Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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A Study on the Application of Pre-Chemical Treatment on the Decentralized Domestic Wastewater Reclamation System

도시의 분산형 생활오수 재생시스템에 화학적 전처리공정도입에 관한 연구

  • Received : 2005.11.16
  • Accepted : 2006.02.07
  • Published : 2006.02.15
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Abstract

The purpose of this study was to investigate applicability of pretreatment on the existing biological treatment for domestic wastewater reclamation. From Jar Tests, it was found that optimum dosage of coagulant was PAC 0.5mg/L and $FeCl_3$ 180mg/L for urban sewage. In this study, PAC 0.5mg/L was selected considering sludge production and the amount of coagulant required. In a continuous experiment performed with combining chemical coagulation and biological treatment, a considerable removal efficency was obtained in term of BOD, SS, T-N, T-P and ABS. When the raw sewage was supplied into the pre-chamical treatment facility, the removal of BOD and SS was 48.3% and 81.1%. However T-N removal was very low which means T-N consists of $NH_3-N$ mostly. T-P was almost completely recluced by the chemical addition. The effluent BOD & SS was 57~76 and 21~43mg/L, which could reduce the size of biological treatment facility. From the cost estimation pre-chemical treatment could save around half of the area required for biological treatment with post ceagulation.

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References

  1. 건설부 (1992) 하천환경정비기법 개발 연구 조사보고서
  2. 곽종운 (1994) 무기응집제(Hi-PAX)에 의한 화학적 하수처리 공정의 국내적용에 관한 연구, 하수도심포지움, pp. 87-107
  3. 김희근 (2004) 황산이온과 이중응집이 응집공정에 미치는 영향, 창원대학교 석사논문
  4. 박흥석 외 2 (1996) 1차 침전법 하수처리장의 화학적 처리에 의한 개선, 하수도 제36회 심포지움, 하수도협회지, 23(5), pp.31-45
  5. 박흥석 외 1 (1997) 1차 침전 하수처리장의 화학적 고도화, 대한환경공학회지, 19(4), pp. 529-540
  6. 장영호 외 8 (2001) 현수미생물접촉여재 소재별 운전특성과 적정 포기방법에 관한 연구, 환경연구원보, 제14권
  7. 조병락 외 2 (1995) 현수미생물접촉법(HBC)에 의한 염색폐수처리, 환경관리학회지, pp. 105-114
  8. $H.{\phi}degaard$ 외 1 (1994) Chemical Wastewater Treatment-Value for Money, in Chemical Water and Wastewater Treatment III, Springer-Verlag Berlin Heidelberg, pp. 191-210
  9. Ingemar Karlsson 외 1 (1991) Pre-precipitation Facilitates Nitrogen Remonval without Tank Expansion, Water. Sci. Technol., 23, pp.811-817 https://doi.org/10.2166/wst.1991.0532
  10. U. Nyberg 외 3 (1994) The Use of Polymer in the preprecipitation Step of a Wastewater Treatment System for Extended Nutrient Removal, in Chemical Water and Wastewater Treatment III, Springer-Verlag Berlin Heidelberg, pp. 211-220
  11. Y.J. Shao 외 4 (1996) Advanced Primary Treatment: An Altenative to Biological Secondary Treatment. The City of Los Angeles HYPERION Treatment Plant Experience, Water. Sci. Technol., 34(3-4), pp. 223-233