논문 상세보기

한국폐기물자원순환학회> 한국폐기물자원순환학회지> 호기성 폐기물매립지의 온실가스 감축효율 및 메탄보정계수(MCF) 평가

KCI등재

호기성 폐기물매립지의 온실가스 감축효율 및 메탄보정계수(MCF) 평가

Assessment of Greenhouse Gas Emission Savings and Methane Correction Factor in an Aerobic Municipal Solid Waste Landfill

송상훈 ( Sang-hoon Song ) , 고준혁 ( Jun-hyeok Ko ) , 박상흠 ( Sang-heum Park ) , 김란희 ( Ran-hui Kim ) , 김상민 ( Sang-min Kim ) , 이남훈 ( Nam-hoon Lee ) , 박진규 ( Jin-kyu Park )
  • : 한국폐기물자원순환학회
  • : 한국폐기물자원순환학회지 38권4호
  • : 연속간행물
  • : 2021년 08월
  • : 303-309(7pages)
한국폐기물자원순환학회지

DOI

10.9786/kswm.2021.38.4.303


목차

Ⅰ. 서 론
Ⅱ. 연구내용 및 방법
Ⅲ. 결과 및 고찰
Ⅳ. 결 론
사 사
References

키워드 보기


초록 보기

This study aims to analyze greenhouse gas (GHG) emissions reductions in anerobic municipal solid waste (MSW) landfills to evaluate the efficiency of active aeration in the reduction of GHG and to verify the accuracy of the methane correction factor (MCF) reported in the 2019 Refinement (i.e., 0.4). Experimental results revealed that the GHG reduction efficiency was 61.1%, which is slightly lower than that reported in literature. However, under the assumption that active aeration was applied to all MSW landfills in Korea in 2018, this finding indicates that active aeration reduced GHG emissions by 4.7 million tons of CO2eq., which is approximately equivalent to 60% of the emissions from the MSW landfills. This corresponds to the 2030 GHG reduction target of Korea’s waste sector. This indicates that the application of active aeration to MSW landfills is essential for reducing GHG emissions from the waste sector. The calculated MCF of the landfill with a methane concentration of 5% or less under aerobic conditions was 0.31 to 0.34, which is lower than the MCF default value suggested in the IPCC guideline (i.e., 0.4). However, further research on MCF in aerobic landfill should be conducted.

UCI(KEPA)

I410-ECN-0102-2022-500-000789914

간행물정보

  • : 공학분야  > 환경공학
  • : KCI등재
  • :
  • : 격월
  • : 2093-2332
  • : 2287-5638
  • : 학술지
  • : 연속간행물
  • : 1984-2022
  • : 2943


저작권 안내

한국학술정보㈜의 모든 학술 자료는 각 학회 및 기관과 저작권 계약을 통해 제공하고 있습니다.

이에 본 자료를 상업적 이용, 무단 배포 등 불법적으로 이용할 시에는 저작권법 및 관계법령에 따른 책임을 질 수 있습니다.

39권2호(2022년 04월) 수록논문
최근 권호 논문
| | | |

KCI등재

1고형 폐기물에 포함된 무기물의 냉각 포집에 관한 실험적 연구

저자 : 윤주형 ( Joohyeong Yoon ) , 김상범 ( Sangbum Kim ) , 김종수 ( Jongsu Kim ) , 구본진 ( Bonjin Koo ) , 김범종 ( Beomjong Kim ) , 류태우 ( Taeu Yu )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 39권 2호 발행 연도 : 2022 페이지 : pp. 87-95 (9 pages)

다운로드

(기관인증 필요)

초록보기

Combustible solid waste usually contains inorganic elements and compounds such as solid oxides (e.g., SiO2, Al2O3, TiO2, and Fe2O3), alkali metals (e.g., Na, K, Mg, Ca, and Cs), and non-metals (e.g., S, P, and Se). When this waste is treated using thermal conversion processes such as combustion, gasification, or pyrolysis, the removal of inorganic substances depends on the process operating conditions. In this study, inorganic elements with a low melting temperature (S, Se, and Cs) were studied experimentally to analyze their evaporation process during thermal conversion and their cooling while passing through a gas-cleaning facility followed by collection in a filter. In the experiments, S, Se, or Cs (as a compound of CaNO3) was mixed with combustible solid waste and fed into an electric heater with N2. The proportion of these elements that were evaporated, condensed, or collected by filters installed in a post-cleaning system was then measured. It was found that the evaporation rate for S, Se, and Cs depends on the interaction between the vapor pressure and molecular weight. The amount of inorganic particles decreased linearly with the ratio of the wire temperature to the boiling temperature. In addition, the amount of Cs particles was higher than that of S and Se. This is because Cs has a much lower vapor pressure and thus condenses earlier on the reactor wall than S and Se at the same temperatures.

KCI등재

2포장재 EPS의 물질흐름분석과 재활용에 따른 온실가스 감축량 산정 연구

저자 : 임진홍 ( Jin Hong Im ) , 장용철 ( Yong-chul Jang )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 39권 2호 발행 연도 : 2022 페이지 : pp. 96-109 (14 pages)

다운로드

(기관인증 필요)

초록보기

Many synthetic resins manufactured using foaming polystyrene (PS) have been reported, including expanded PS (EPS), a thermoplastic polymer widely used in insulation, packaging, aquaculture floats, and buoys. There has been increasing demand for packaging EPS in recent years due to the growth of online shopping and food delivery markets. However, if not adequately managed, EPS decomposes into microplastics, adversely affecting human health and the ecosystem. In this study, the material flow of EPS packaging in Korea was analyzed quantitatively according to its life cycle. In addition, greenhouse gas emissions reduction from recycling EPS was estimated using the US EPA waste reduction model WARM. In 2019, approximately 47,000 tons of EPS were sold and ultimately discharged into plastic waste streams. About 42,000 tons were recycled, of which 40,000 tons (96%) were recycled as ingots, 287 tons as pellets, and 1,521 tons as a fireresistant coating for steel frames. As a result of this recycling, 62,700 tons of CO2eq was reduced in 2019, while the cumulative greenhouse gas reduction from 2003 to 2019 was estimated to be about 592,000 tons of CO2eq. This study demonstrated the potential benefits of minimizing environmental emissions and reducing greenhouse gases through recycling. However, more detailed research is needed to ensure more effective EPS packaging management and thus further minimize potential environmental impacts and microplastic pollution, including investigations into the impacts of restrictions and bans and the consequences for marine littering.

KCI등재

3한우와 젖소 분뇨의 계절별 물리화학적 성상 및 생화학적 메탄 잠재량 변화

저자 : 김승환 ( Seunghwan Kim ) , 이창민 ( Changmin Lee ) , 김준현 ( Junhyeon Kim ) , 조흠 ( Xin Zhao ) , 이상명 ( Sang Myung Lee ) , 이승철 ( Seung Chul Lee ) , 김재영 ( Jae Young Kim )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 39권 2호 발행 연도 : 2022 페이지 : pp. 110-116 (7 pages)

다운로드

(기관인증 필요)

초록보기

The livestock industry produces large volumes of cattle manure, which can be used as an organic fertilizer after composting and renewable energy after anaerobic digestion. In the anaerobic digestion process, cattle manure is usually stored in a cowshed until it is transferred to treatment facilities, and its physicochemical characteristics vary depending on this storage environment. Any change in these characteristics acts as a source of instability in the operation of an anaerobic digester. This study investigated the physicochemical characteristics and biochemical methane potential of cattle manure between seasons. The total solid content of Hanwoo (Korean beef) cattle manure and dairy cattle manure was 29.1 ~ 33.8 and 21.1 ~ 29.5% (by wet wt.), respectively, while the biochemical methane potential was 113.3 ~ 180.8 mLCH4/g-VS for Hanwoo cattle manure and 94.0 ~ 166.2 mL-CH4/g-VS for dairy cattle manure. The amount of methane generated per wet weight of cattle manure, taking into account the change in volatile solid content and biochemical methane potential, differed by 42.8% for Hanwoo cattle manure and 129% for dairy cattle manure. No distinct seasonal patterns in the physicochemical characteristics of the manure were observed due to the influence of other factors (e.g., the storage period). Overall, these results indicate that it is important to design treatment facilities that consider variations in the physicochemical properties and methane generation of cattle manure.

KCI등재

4해양 폐플라스틱 SRF의 고정층 연소 시 우드펠릿 혼소에 따른 화염전파 특성 분석

저자 : 박종근 ( Jongkeun Park ) , 유승한 ( Seunghan Yu ) , 김희윤 ( Heeyoon Kim ) , 류창국 ( Changkook Ryu ) , 김종현 ( Jonghyun Kim ) , 이재하 ( Jaeha Lee ) , 허준 ( Joon Heo )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 39권 2호 발행 연도 : 2022 페이지 : pp. 117-126 (10 pages)

다운로드

(기관인증 필요)

초록보기

Marine waste plastic is a source of a variety of health and safety concerns in marine ecosystems. One disposal option for marine waste plastic is pelletization and subsequent combustion for energy recovery. However, with plastic pellets in a fixed bed, which is widely employed in waste combustion processes, it is difficult to achieve stable and continuous propagation of the ignition front from the surface to the bottom of the bed because of the melting of the plastic and subsequent blockage of air passages. This study investigated the fixed bed combustion of plastic pellets with the cofiring of wood pellets at different cofiring ratios and airflow rates. It was found that the steady propagation of the ignition front can be achieved via cofiring with at least 20 wt.% wood pellets. The burning rate was approximately 123 kg/m2h, and this figure can be used to determine the minimum area required for the design of the moving grate.

KCI등재

5EFB 연소공정에서 첨가제에 의한 클링커 형성 억제에 관한 연구

저자 : 박찬 ( Chan Park ) , 김혁진 ( Hyeok Jin Kim ) , 송민정 ( Min Jeong Song ) , 오세천 ( Sea Cheon Oh )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 39권 2호 발행 연도 : 2022 페이지 : pp. 127-138 (12 pages)

다운로드

(기관인증 필요)

초록보기

The carbon emitted by the use of fossil fuels pollutes the environment, necessitating the development of alternative energy sources. However, renewable energy derived from nature such as solar energy and wind power is insufficient in practical applications. As a result, studies on the combustion efficiency of various forms of biomass, including empty fruit bunches (EFB) generated as a by-product of palm oil production, have been conducted. However, the generation of clinkers in the combustor during high-temperature combustion reduces the combustion efficiency and increases the treatment costs. Therefore, the effect of additives on clinker formation in the EFB combustion process was studied in this study. Kaolin and dolomite were tested as additives to inhibit clinker formation at additive-to-EFB-ash mass ratios of both 1 : 2 and 1 : 4, and the experimental reaction temperature was increased from 800℃ to 1000℃ at intervals of 50℃. The characteristics of the clinkers, including their sintering shape, were analyzed using X-ray diffraction and Xray fluorescence spectrometry for each experimental condition.

KCI등재

6국내 생활 및 의료 폐기물소각시설의 다이옥신 배출계수 산정방법에 관한 연구 - 중·대형시설 1 ton/hr 이상 중심으로 -

저자 : 권은혜 ( Eun-hye Kwon ) , 박세인 ( Sein Park ) , 강준구 ( Jungu Kang ) , 이승재 ( Seungjae Lee ) , 이원석 ( Wonseok Lee ) , 김기헌 ( Kiheon Kim )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 39권 2호 발행 연도 : 2022 페이지 : pp. 139-151 (13 pages)

다운로드

(기관인증 필요)

초록보기

Dioxin is unintentionally generated during waste incineration and heat treatment processes. The Stockholm Convention conducts research, development, and monitoring to eradicate persistent organic pollutants (POPs), so some countries are currently calculating dioxin emissions. Emissions are also being calculated in Korea, and we would like to improve the dioxin calculation method currently in use. In this study, two different calculation methods were used and compared. Calculation method A is now in use, and data measured on the same day was used as the calculation factor. Calculation method B was developed, where the average of the annual data was used as the calculation factor. The emission factors were calculated using methods A and B for municipal waste incineration facilities with a 2 t/h or higher processing rate. The method A results were 81 ~ 204 ng I-TEQ/ton, and the method B results were 79 ~ 284 ng I-TEQ/t. Also, the emission factors were calculated using both methods for medical waste incineration facilities with a processing rate of 1 t/h or higher. The method A results were 834 ~ 2,737 ng I-TEQ/t, and the method B results were 737 ~ 2,049 ng I-TEQ/ton. The range of fluctuations was small. In the future, if the facility operation data of small incineration facilities are confirmed, it is judged that comparative analysis is also helpful.

KCI등재

7데이터센터 폐열의 지역난방 활용에 대한 경제적 효익 평가 및 온실가스 배출량 평가

저자 : 박미숙 ( Mi Sook Park ) , 황용우 ( Young Woo Hwang ) , 김다연 ( Da Yeon Kim ) , 양수진 ( Soo Jin Yang ) , 문진영 ( Jin Young Moon )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 39권 2호 발행 연도 : 2022 페이지 : pp. 152-159 (8 pages)

다운로드

(기관인증 필요)

초록보기

As carbon neutrality emerges as a global challenge, the government announced the “Data Dam” as one of the ten major projects of the Korean New Deal. Accordingly, the number of data centers and the amount of power usage for equipment operation are expected to increase due to the acceleration of the data economy. In this study, the costs of existing heating systems and district heating systems using data center waste heat are compared according to the life cycle cost analysis using the payback period method. However, the payback period method has difficulty reflecting future value, so the value was complemented using the present value method. When the data center waste heat is used as district heating, assuming that the energy cost is frozen (scenario 1), the benefit is about KRW 4 billion for 1,000 households, and the investment cost recovery takes 18 years. On the other hand, if the energy cost goes up by 5% every five years from the start of the project (scenario 2), the resulting energy savings is about KRW 30 billion, and the time to recoup the initial investment is shortened by eight years. The study calculated greenhouse gas (GHG) emissions according to energy consumption for each scenario in accordance with the 2006 Intergovernmental Panel on Climate Change (IPCC) Guidelines. The results are 14.9 tCO2-eq for scenario 1 and 0.006 tCO2-eq for scenario 2 (a reduction of more than 99% in GHG emissions compared to scenario 1).

KCI등재

8사후관리 결과 분석을 통한 순환굵은골재 품질인증 3차 시험의 타당성 연구

저자 : 전수민 ( Soomin Jeon )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 39권 2호 발행 연도 : 2022 페이지 : pp. 160-165 (6 pages)

다운로드

(기관인증 필요)

초록보기

Recycled coarse aggregates are tested twice for certification. If an aggregate passes both tests, the aggregate is certified; if it fails both, the aggregate is not certified. If the aggregate only passes one, then a third test is conducted to certify it for conformance or to terminate it if it does not conform. In other national certifications, such as fire-resistance structures, if one of two quality tests fails, the case is closed, so it can be considered that the quality test for aggregate certification that can be used for the third test is relatively easy. Follow-up audits for the certified products for the past three years were analyzed to see if there is a difference in the post-quality of aggregates certified by the secondary and tertiary tests. The results show no statistically significant difference between the two, and therefore, the tertiary test procedure of the certification process did not negatively affect the quality assurance of recycled aggregate.

KCI등재

9토픽모델링 분석을 활용한 국내 자원순환 연구동향 분석

저자 : 유재호 ( Jae-ho Yoo ) , 김하나 ( Hana Kim )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 39권 2호 발행 연도 : 2022 페이지 : pp. 166-173 (8 pages)

다운로드

(기관인증 필요)

초록보기

Since the Wastes Control Act of 1987, Korea has laid the groundwork for proper waste management. The Framework Act on Resource Circulation was enacted in 2016 to manage and use waste throughout the entire lifecycle efficiently. Furthermore, “resource circulation” has recently become mainstream in domestic policies, such as establishing a digital-based resource circulation industrial complex as a part of the Korean New Deal 2.0. This study collected domestic studies on resource circulation, which has recently emerged as a major environmental issue, and analyzed research trends using topic modeling analysis. Relevant articles were collected from the Korea Citation Index using the keywords “resource circulation” and “circular economy,” and topic modeling analysis was performed on 207 papers and 712 keywords. Seven topics were drawn from the analysis: (1) energy-climate change policy, (2) eco-friendly design and systems, (3) waste electronics and plastic management, (4) revitalization of circular economy and local community, (5) environmental laws related to resource circulation, (6) concrete using recycled resources, and (7) matter flow analysis and management systems. In sum, it was found that many resource circulation studies have been conducted to address energy and climate change issues. In addition, resource circulation studies are not limited to policies and laws. Various studies are carried out across disciplines, such as engineering research on the management and utilization of specific resources and analytical research using tools, such as life cycle analysis (LCA). The findings of this study contributed to organizing major issues in recent resource circulation-related research and guiding future resource circulation-related studies.

KCI등재

10전기 및 가스 연소 열원을 이용한 커피찌꺼기 건조특성 평가

저자 : 이재희 ( Jae-hee Lee ) , 최장욱 ( Jang-wook Choi ) , 상병찬 ( Byung-chan Sang ) , 엄태인 ( Tae-in Ohm )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 39권 2호 발행 연도 : 2022 페이지 : pp. 174-183 (10 pages)

다운로드

(기관인증 필요)

초록보기

The water content of the coffee grounds discharged from coffee beverage production facilities and coffee stores is about 75 wt.%. When the coffee grounds is used as solid energy source, drying technology is important because the high water content of the coffee grounds causes lower heating values reduction and combustion deterioration. In particular, it is necessary to maintain a constant water content of the dried coffee grounds with low energy consumption. In this study, two types of coffee ground batch dryer were tested: an electric heating and a gas burning system. After coffee grounds were injected into each dryer, vapor evaporation, drying rate, specific moisture evaporation rate, and drying efficiency were measured. The drying systems applied the moisture intensity (pulse, P) sensor and an automatic control program to maintain the moisture content of the dried coffee grounds. The drying performance and efficiency of the electric heating dryer were 21% and 33% higher than the gas burning dryer, respectively. The water content of dried coffee grounds is about 2.1 wt.%, and the ash content is 1.5 wt.%. The lower calorific value of dried coffee grounds is 5,710 kcal/kg, satisfying Bio-SRF (solid refuse fuel, Korea) quality standard. Therefore, when the dried coffee grounds is used as a solid energy source, it is advantageous to reduce the amount of greenhouse gas and save fossil fuels compared to the case of landfilling the dried coffee grounds.

1
권호별 보기
같은 권호 다른 논문
| | | | 다운로드

KCI등재

1COVID-19 감염병 확산에 따른 일회용 마스크의 적정 관리 방안 연구

저자 : 이송현 ( Songhyun Lee ) , 김병환 ( Byeonghwan Kim ) , 지승민 ( Seungmin Ji ) , 장용철 ( Yong-chul Jang ) , 이어진 ( Eojin Lee ) , 박미솔 ( Misol Park ) , 김선용 ( Sunyong Kim ) , 심유나 ( Yuna Sim ) , 김동현 ( Donghyeon Kim ) , 한소영 ( Soyeong Han )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 38권 4호 발행 연도 : 2021 페이지 : pp. 281-293 (13 pages)

다운로드

(기관인증 필요)

초록보기

This study examined the current management and problems of discarded single-use masks in Korea during COVID- 19. Field visits have been made to identify potential problems associated with the disposal of single-use face masks. We analyzed a total of 32 discarded single-use face masks and newly made singe-use face masks for material composition and characteristics. Based on this study, there were more than 6.7 billion single-use masks manufactured in 2020, indicating that more than six times higher than the production of the masks in 2019 due to COVID-19 pandemic. The average use of single-use face masks per person was found to be 130 masks/yr, which is equivalent to 6.7 billion masks/yr in 2020 in Korea. After the collection of the used masks, the large fraction of discarded masks was incinerated (14,961 ton or 3.8 billion masks) and landfilled (8,056 ton or 2.1 billion masks). Only approximately 1% of the discarded masks from households was improperly disposed on streets, parks, roads, shopping carts, rivers and streams, and other environment. Improper disposal of such masks may pose a threat to humans, animals, and other ecological receptors because of potential spread of virus, the occurrence of microplastics and their non-biodegradable characteristics. Technical development of biodegradable face masks has been made from scientific community to reduce plastic pollution from single-use face masks. However, more research is still needed to warrant the safety, biodegradability, waste management, and economic factors of the eco-friendly face masks. Waste minimization and prevention of single-use face masks is a challenging task due to the preference of the mask to consumers over the COVID-19 pandemic.

KCI등재

2순환경제를 위한 PET병 물질흐름분석과 재활용에 따른 온실가스 감축량 산정 연구

저자 : 임진홍 ( Jin Hong Im ) , 장용철 ( Yong-chul Jang )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 38권 4호 발행 연도 : 2021 페이지 : pp. 294-302 (9 pages)

다운로드

(기관인증 필요)

초록보기

Plastic wastes are majorly packaging plastic materials composed of polyethylene terephthalate (PET). The improper disposal of PET bottles can cause severe environmental problems, such as environmental plastic pollution, greenhouse gas emission, resource depletion, and marine plastic pollution. Owing to the steady increase in the consumption of PET bottles, it is important to improve the recycling rates and quality of recycled PET products. This study analyzed the material flow of PET bottles in Korea in 2018 to develop an appropriate management policy for recycling PET bottles. In addition, the content of greenhouse gases reduced via the recycling of PET bottles was quantified using US EPA waste reduction model (WARM). The results revealed that approximately 301,000 tons of PET bottles were sold and discharged as plastic waste in 2018. In addition, approximately 236,000 tons of waste PET bottles were recycled. Consequently, about 240,000 tons of CO2eq was reduced in 2018 and 1,768 thousand tons of CO2eq was reduced from 2010 to 2018. This study aimed to highlight the potential benefits of recycling PET bottles by providing the content of reduced greenhouse gas and recycled materials. The quantitative analysis of the material flow revealed that it is essential to perform high-quality recycling of PET bottles (e.g., bottle-to-bottle and long-fiber uses) in contrast to low-grade recycling to achieve a circular economy.

KCI등재

3호기성 폐기물매립지의 온실가스 감축효율 및 메탄보정계수(MCF) 평가

저자 : 송상훈 ( Sang-hoon Song ) , 고준혁 ( Jun-hyeok Ko ) , 박상흠 ( Sang-heum Park ) , 김란희 ( Ran-hui Kim ) , 김상민 ( Sang-min Kim ) , 이남훈 ( Nam-hoon Lee ) , 박진규 ( Jin-kyu Park )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 38권 4호 발행 연도 : 2021 페이지 : pp. 303-309 (7 pages)

다운로드

(기관인증 필요)

초록보기

This study aims to analyze greenhouse gas (GHG) emissions reductions in anerobic municipal solid waste (MSW) landfills to evaluate the efficiency of active aeration in the reduction of GHG and to verify the accuracy of the methane correction factor (MCF) reported in the 2019 Refinement (i.e., 0.4). Experimental results revealed that the GHG reduction efficiency was 61.1%, which is slightly lower than that reported in literature. However, under the assumption that active aeration was applied to all MSW landfills in Korea in 2018, this finding indicates that active aeration reduced GHG emissions by 4.7 million tons of CO2eq., which is approximately equivalent to 60% of the emissions from the MSW landfills. This corresponds to the 2030 GHG reduction target of Korea's waste sector. This indicates that the application of active aeration to MSW landfills is essential for reducing GHG emissions from the waste sector. The calculated MCF of the landfill with a methane concentration of 5% or less under aerobic conditions was 0.31 to 0.34, which is lower than the MCF default value suggested in the IPCC guideline (i.e., 0.4). However, further research on MCF in aerobic landfill should be conducted.

KCI등재

4Methane Production of Food Waste Anaerobic Digestion Recovered from NaCl Inhibition by Water Dilution

저자 : Eunil Cho , Qiyong Xu , Danling Xia , Jae Hac Ko

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 38권 4호 발행 연도 : 2021 페이지 : pp. 310-317 (8 pages)

다운로드

(기관인증 필요)

초록보기

One of the significant challenges of food waste anaerobic digestion (AD) is the negative effect of high NaCl concentrations. This study investigated the effects of NaCl fluctuation on the methane generation of food waste AD under thermophilic and mesophilic conditions. Particularly, the effects of the shock loading of high NaCl concentration with/ without water dilution treatment were investigated. Generally, the methane generation decreased with increasing NaCl concentration. In addition, the sensitivity of the thermophilic AD to NaCl concentrations (5-10 g/L) was higher than that of the mesophilic AD. Furthermore, with an increase in the NaCl concentration from 0 to 30 g/L, the accumulative methane volumes of the thermophilic reactors decreased from 210 to 45 mL/gVS, and those of the mesophilic reactors decreased from 265 to 67 mL/gVS. Additionally, the pH of digestate decreased with increasing NaCl concentration. In contrast, the concentrations of the chemical oxygen demand and volatile fatty acid increased with increasing NaCl concentration. These results indicated that a shock loading of NaCl significantly reduced methane generation. In addition, the methane generation rates could be recovered up to 64-72% using water dilution as a remedial measure. Further investigation using 16S rRNA analysis revealed that the predominant genus of the methanogens shifted from Methanoculleus to Methanosarcina after the removal of the osmotic stress using water dilution.

KCI등재

5Lab-Scale 반응기를 이용한 PCNs 함유 폐기물의 소각처리 가능성 연구

저자 : 권은혜 ( Eunhye Kwon ) , 배지수 ( Jisu Bea ) , 김우일 ( Wooil Kim ) , 윤영삼 ( Youngsam Yoon ) , 이원석 ( Wonseok Lee ) , 박호연 ( Hoyeun Park )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 38권 4호 발행 연도 : 2021 페이지 : pp. 318-329 (12 pages)

다운로드

(기관인증 필요)

초록보기

Polychlorinated naphthalenes (PCNs), one of Persistent Organic Pollutants (POPs), and are colorless crystalline substances with similar structure and physical and chemical properties with PCB (polychlorinated biphenyl), and are produced by the chlorination of naphthalene. PCN is one of POPs are rarely degraded in the environment; consequently, they negatively impact the environment by threatening human health and the ecosystem. In this study, the potential of a stable treatment for lab-scale-incinerated waste containing PCNs was evaluated. For this study, waste containing PCNs were selected as the surface coating agent, mixed sample, and technical sample. The results revealed that when the PCNs concentration was 34.552 ~ 2,582.463 ng/g, the concentrations of Mono-CN and Tetra-CN were higher than those of other homologues. The incineration treatment conditions were derived by measuring three parts, after which the elemental composition was analyzed and the calorific value, theoretical air content, and residence time were calculated. Using the temperature of the target sample, thermogravimetric analysis revealed that the incineration treatment can be achieved at the incineration temperature of the existing incineration facility via weight change. Therefore, the incineration temperature was set between 850 and 1,100℃; however, the incineration temperature of the sample containing a high concentration of PCNs was set at 350, 500, 850, and 1,100℃. At 350 and 500℃, high concentrations of CO and NOx were observed, which could be attributed to incomplete combustion. Furthermore, heat-sensitive PCNs showed a de-chlorination reaction between 200 to 440℃. In addition, the decomposition rate (DRE) slightly increased according to the incineration temperature increase.

KCI등재

6Alum 슬러지를 이용한 인제거용 흡착제 개발

저자 : 한상무 ( Sang Moo Han ) , 김도형 ( Do Hyung Kim ) , 김소희 ( So Hee Kim ) , 김홍민 ( Hong Min Kim ) , 정병곤 ( Byung Gon Jeong )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 38권 4호 발행 연도 : 2021 페이지 : pp. 330-336 (7 pages)

다운로드

(기관인증 필요)

초록보기

Various media were manufactured using different ratios of alum sludge obtained from a water purification plant, loess, and clay, and the properties of the media were investigated. The results revealed that the optimal compressive strength was achieved at a ratio of 15/65/20 (alum sludge/loess/clay). In addition, the absorption rate of the media increased with an increase in the quantity of alum sludge in the media. Furthermore, the scanning electron microscopy analysis of the pore structure of the media revealed that the optimal permeability was achieved at a ratio of 15/65/20. Additionally, the manufactured media satisfied the dissolution test of heavy metals regardless of the mixing ratio. Furthermore, at the optimal mixing ratio, the removal efficiency of phosphorus by the media increased with a decrease in the size of the media.

KCI등재

7우리나라 타이어 마모 분진 배출량 및 수계 유입량 추정

저자 : 이혜성 ( Hyesung Lee ) , 김용진 ( Yongjin Kim )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 38권 4호 발행 연도 : 2021 페이지 : pp. 337-349 (13 pages)

다운로드

(기관인증 필요)

초록보기

Tire particles account for a high proportion of emitted microplastics, and the quantity is increasing with an increase in the production of vehicles and tires. Such tire particles are present not only in roadsides, rainwater inlets, and sewage treatment facilities, but also in mud flats. Tire particles are introduced into water environment through the atmosphere and rainwater. In this study, the inflow of tire particles to water environment in Korea based on district was estimated using statistical data on roads and sewage management areas and previous studies. In addition, the quantity of tire particles generated by each type of vehicle and the ratio of the inflow of the generated tire particles to water environment based on the district and type of road and vehicle were reviewed. The results revealed that the quantity of tire particles generated in Korea was 49,995 t per year, and the quantity of tire particles generated based on the vehicle type was in the order of heavyweight truck > bus > passenger car > lightweight truck. In addition, the quantity of tire particles discharged to the atmosphere was 50-4,999 tonnes per year, and the quantity of tire particles retained on the ground surface was 44,995- 49,945 tonnes per year. Furthermore, the quantity of tire particles introduced to water environment was 12,897-24,241 tonnes per year, and the inflow to water based on the road type was in the order of other roads > national road > highway.

KCI등재

8도시 하수슬러지의 열 가수분해와 농업용 바이오솔리드로의 이용

저자 : 안조환 ( Johwan Ahn ) , 하승수 ( Seung-soo Ha )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 38권 4호 발행 연도 : 2021 페이지 : pp. 350-356 (7 pages)

다운로드

(기관인증 필요)

초록보기

Biosolids are physically or chemically stabilized organic solids derived from sewage treatment processes. In the last one year, municipal sewage sludge, which is treated using thermal hydrolysis, has been used as a raw material for export fertilizer. Thus, in this study, we investigated if the quality of biosolids recovered from sewage treatment plants equipped with both thermal hydrolysis and anaerobic digestion processes meets the Korean fertilizer raw material standards. The investigations revealed that the contents of heavy metals, Ni, Zn, and Al in biosolids were higher than the regulated standards; however, pathogens, such as Escherichia coli and Salmonella sp., were not observed in the biosolids. The results indicated that biosolids are inappropriate as a raw material for domestic fertilizer. Nevertheless, as biosolids can be used for manufacturing export fertilizer, it is necessary to establish the quality standards for toxic heavy metals, pathogens, and organic micropollutants present in biosolids for the protection of public health.

KCI등재

9재활용 PET 투수블록과 시멘트 투수블록의 환경영향 비교평가에 관한 연구

저자 : 임성현 ( Sung-hyun Lim ) , 윤석표 ( Seok-pyo Yoon )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 38권 4호 발행 연도 : 2021 페이지 : pp. 357-365 (9 pages)

다운로드

(기관인증 필요)

초록보기

In this study, we developed an environmental assessment method to investigate permeable blocks prepared using recycled polyethylene terephthalate (PET) as a binder. First, Los Angeles abrasion test was conducted to simulate the surface abrasion caused by the long-term use of water-permeable block, and the number of rotations was 100-300. To separate the microplastics from the residual fragments of the degraded surface of the permeable block, the microplastics were subjected to a flotation process using calcium chloride as a sorting solvent. The obtained microplastics from the abrasion test was quantitatively and qualitatively analyzed using a particle size analyzer, microscopy, and Fourier transform-infrared spectroscopy. To obtain the extract, the permeable block was subjected to a leaching test, and the pH and Ca concentration were measured. The pH of the cement-based permeable block (10.79 ± 0.17) was higher than that of the PET-based permeable block (9.58 ± 0.23). In addition, the extracts of recycled PET- and cement-based permeable blocks were subjected to an acute toxicity test using Daphnia, and the results revealed that the toxic unit of the recycled PET permeable blocks was 0, whereas that of the cement-based permeable blocks was 1.98 ± 0.11.

KCI등재

10연소공기비율에 따른 가축분뇨연료 소각로 내 연소특성에 대한 수치해석 연구

저자 : 윤종혁 ( Jonghyuk Yoon ) , 송형운 ( Hyoungwoon Song ) , 장은석 ( Eun-suk Jang )

발행기관 : 한국폐기물자원순환학회 간행물 : 한국폐기물자원순환학회지 38권 4호 발행 연도 : 2021 페이지 : pp. 366-376 (11 pages)

다운로드

(기관인증 필요)

초록보기

With the depletion of fossil fuels, the use of new and renewable energy has attracted significant attention. Among various biomass fuels, wood pellets and chips are used as commercial fuels owing to their low water content compared to sewage sludge and food waste. Recently, the use of livestock manure as fuel has attracted significant owing to its ease of collection and transportation. However, the low economic feasibility of co-firing boiler, which is used to process livestock manure solid refuse fuel (SRF), has limited the further application of livestock manure. Therefore, the development of an efficient grate boiler for livestock-manure is highly needed. In this study, a three-dimensional computational fluid dynamics simulation was performed to evaluate the combustion performance of a livestock manure SRF grate furnace. To validate the numerical method, the numerical results of the temperature and species concentration at several monitoring points were compared to those of the experimental results. In addition, a parametric study was performed using various ratios of primary to assist air to understand the effects of air conditions on the overall combustion performance.

1
발행기관 최신논문
자료제공: 네이버학술정보
발행기관 최신논문
자료제공: 네이버학술정보

내가 찾은 최근 검색어

최근 열람 자료

맞춤 논문

보관함

내 보관함
공유한 보관함

1:1문의

닫기