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Methane Fermentation of the Paper Mill Sludge under Anaerobic Condition

제지슬러지의 혐기메탄발효

  • Published : 2004.03.31

Abstract

The activated paper mill sludge was treated with WF and some additives (sodium sulfide, nickel nitrate, ethyl acetate) for methane fermentation at $35^{\circ}C$. Optmum C/N ratio was 60 out of three conditions (20, 30 and 60). The Period of 40% of methane content possibly ignition, was 2 days shorter than with non-treatment during 10 days. Nevertheless, the total amount of methane production showed the 1/8 level of control far the same period. The yield and content of methane were increased by the addition of sodium Sulfur and ethyl acetate. Sulfur was an essential factor in methane fermentation of paper mill sludge.

제지공장의 슬러지를 활성오니슬러지와 집수조슬러지로 나누어 C/N율, 메탄발효폐액 첨가 그리고 몇몇 첨가제를 처리하고 발생한 혐기발효가스 중 메탄함량을 측정하여 각각의 처리효과를 조사해 보았다. 1. 활성오니 제지슬러지를 이용한 메탄발효의 최적 C/N율은 60으로 이전의 다른 재료들과는 다른 경향이었다. 2. 혐기발효 폐액의 첨가로 메탄함량 40% 도달 시간은 약 2일정도 앞당겼지만, 10일간의 총 메탄발생량은 1/8 수준으로 적었다. 3. 첨가제중 sodium sulfide와 ethylacetate의 처리효과는 발효폐액 첨가구에서 뚜렷하였고, 무첨가구에서도 sodium sulfide는 1.3배의 메탄생성 증가에 기여하였다. 4. 황화수소가 제거된 제지슬러지에서는 메탄이 전혀 생성되지 않았고, sodium sulfide가 첨가된 처리구에서는 메탄생성이 증가되었기에 제지슬러지 메탄발효에서 황은 필수적이라고 할 수 있다.

Keywords

References

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