Journal of the Korea Organic Resources Recycling Association (유기물자원화)

Korea Organic Resources Recycling Association (유기성자원학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on Environmental and Economic Analysis for Each Treatment of Sewage Sludge(III) - Results of Environmental Assessment -

하수슬러지 처리방법별 환경성 및 경제성 분석에 대한 연구(III) - 환경성 분석 중심으로 -

  • Bae, Jisu (Environmental Resource Research Department, National Institute of Environmental Research) ;
  • Lee, Suyoung (Environmental Resource Research Department, National Institute of Environmental Research) ;
  • Cho, Yuna (Environmental Resource Research Department, National Institute of Environmental Research) ;
  • Kwon, Younghyun (Environmental Resource Research Department, National Institute of Environmental Research) ;
  • Lee, Dongjin (Environmental Resource Research Department, National Institute of Environmental Research)
  • 배지수 (국립환경과학원 환경자원연구부) ;
  • 이수영 (국립환경과학원 환경자원연구부) ;
  • 조윤아 (국립환경과학원 환경자원연구부) ;
  • 권영현 (국립환경과학원 환경자원연구부) ;
  • 이동진 (국립환경과학원 환경자원연구부)
  • Received : 2016.05.10
  • Accepted : 2016.06.13
  • Published : 2016.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

This study investigated the environmental and economical assessment for sewage sludge treatment options including biogasification, incineration, carbonization, drying, and solidification. For the economical feasibility the 30 plants with anaerobic digestion treatment and the 17 plants without anaerobic digestion treatment were investigated. In regarding to the environmental assessment, the air emission pollutants (SOx, NOx, etc) from incineration and carbonization plants were assessed and 1~34 % of emission limits was emitted. Drying and solidification plants emitted about 30 % of odour limits. And the rest of the pollutants were emitted either at not-detectable level or at below the limits. When the by-products from the solidification treatment was used as landfill cover materials, the unconfined compression strength could be below the limit and it could cause an unsafe condition for those passing vehicles and the possibility of the ground subsidence. There has been a maintenance difficulty due to frequent blockage and operational failure. The result of the comparison of sewage sludge treatment options showed that anaerobic digestion+incineration was the most economically feasible considering incineration and drying. For smaller treatment capacity, solidification was the most economically feasible considering carbonization and solidification and anaerobic digestion+carbonization was the most economically feasible considering carbonization and solidification.

본 연구는 바이오가스화 처리 유 무에 따라 하수슬러지 처리방법별, 즉 소각, 탄화, 건조, 고형화 등에 대한 환경성 및 경제성 분석을 실시하였다. 환경성 분석에 대하여, 소각 및 탄화로부터의 대기오염물질은 기준치의 1-34 % 수준으로 배출되고 있었다. 건조 및 고형화는 악취 기준치의 30 % 정도 배출되고 있었다. 나머지 오염물질들은 검출되지 않거나 기준치 이하에서 관리되고 있었다. 고형화에서 부산물은 매립지 복토재로서 사용될 때, 일축강도가 기준치보다 못미쳐서 차량 통해서 불완전하고 토양유실의 가능성이 있다. 또한 고형화는 빈번한 공정 막힘과 운전 중단 등의 어려움이 많은 것으로 조사되었다. 결과적으로, 환경성 및 경제성을 고려할 때 혐기소화 이후 후처리로 소각 또는 건조하는 경우가 가장 타당한 것으로 분석되었으며, 후처리로 탄화처리하는 경우가 가장 타당성이 적은 것으로 분석되었다. 고형화 처리는 가장 경제적이었으나 환경적 및 운전성이 부족하여 타당성이 부족한 것으로 분석되었다.

Keywords

References

  1. Ocean dumping management system, http://www.oceandumping.re.kr/lundonconvention, (2013).
  2. Ministry of Environment, 2011 Sewer statistics, (2012).
  3. Ministry of Environment, Official testing method on wastes, (2012).
  4. Buswell, A. M. and Muller, H. F., "Mechanism of methane formation", Industrial and Engineering Chemistry, 44, pp. 550-552 (1952). https://doi.org/10.1021/ie50507a033
  5. Angelidak, I. and Sanders, W., "Assessment of the anaerobic biodegradability of macropollutants", Reviews in Environmental Science and Bio/Techology, 3, pp. 117-129 (2004). https://doi.org/10.1007/s11157-004-2502-3
  6. Ministry of Environment, Energy technology on the biogasification, Korean Environment Coorperation (2011).
  7. Anti H., Addition of Esters on Anaerobic digestion: inhibiting or boosting biogas production, Master thesis, Chalmers University of Technology, Sweden (1912).
  8. Appels et al., "Principles and potential of the anaerobic digestion of waste-activated sludge", Progress in Energy and Combustion Science, 34, pp. 755-781 (2006).
  9. Yiying, J., "Biomass-biogas recycling technique studies of municipal food waste disposal: a review", Rocznik Ochrona Srodowiska, 14, pp. 21-55 (2012).
  10. Kim, M., "Monitoring of digester optimum and impediment factors in intermediate temperature anaerobic digestion using high-concentration food wastes, J. Korean Soc. Urban Environment, 11(2), pp. 161-167 (2011).
  11. Lee, J., "Effect of ammonia and salinity in the anaerobic digestion using food waste, J. Korean Soc. Environ. Eng. 19(9), pp. 1185-1192 (1997).
  12. Korean Institute of Development Research, An research on supplementary revision of general manual of preliminary feasibility plan, (2004).
  13. Korea of Environment, An research on improvement plan of establishment.operation and economic analysis of each livestock excretion treatments, pp. 46-50 (2011).
  14. Korea of Environment, An research on calculation of unit requirement of water and wastewater in housing area and cost of sewage treatment facilities, Korean Land Cooperation (2001).
  15. Park, J., An research on emission characteristic of hazardous air pollution matters in incineration of sewage sludge, National Institute of Environmental Research (2006).
  16. Wang, et al., "Environmental effects of sewage sludge carbonization and other treatment alternatives", Energies, 6, pp. 871-883 (2013). https://doi.org/10.3390/en6020871