Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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The Fermentation Characteristics of Foodwaste with Rumen Microbes

Rumen Microbes을 이용한 음식물 쓰레기의 발효특성

Sim, Nag-Jong;Kim, Byoung-Ug;Rim, Jay-Myoung
심낙종;김병욱;임재명

  • Published : 20021100
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Abstract

This research was performed to investigate the fermentation characteristics of food-waste with rumen microbes, and the effect of NaCl, ${NH_4}^+-N$ and alkaline pretreatment. As a results of experiment, total volatile fatty acids(TVFA) production rate was very low at 5.000 mg/L-NaCl over and ${NH_4}^+-N$ concentration had no particular effect on the formation of TVFA at 2.000 mg/L over. In the case of first-order decay rates of VSS. it was very high at CaO treatment. TVFA production rate was high at CaO, $CaC0_3$ treatment and high foodwaste loading. The correlation between TVFA and SCOD concentration was TVFA=$0.8656{\times}SCOD$-295.62 with high relation concern as $R^2$ = 0.8589. Consequently, the TVFA production of foodwaste fermentation with rumen microbes is influenced at high foodwaste loading under the concentration of 5,000 mg/L-NaCl and the adaptable pretreatment is a CaO treatment.

반추미생물을 이용한 음식물 쓰레기의 발효시 NaCl 및 ${NH_4}^+-N$ 농도에 대한 영향과 알칼리 전처리에 따른 발효특성에 대하여 고찰하였다. 실험결과 NaCl은 5,000 mg/L 이상의 농도에서 저해로 작용하였으며 ${NH_4}^+ N$는 2,000 mg/L 이상의 농도에서 초기 지체시간은 있었으나 최대 농도에는 영향을 미치지 않았다. VSS 1차 분해 속도상수는 CaO 처리시 가장 높았다. TVFA 생성율은 CaO, $CaC0_3$, 미처리 순이었으며 부하량이 높올수록 TVFA 생성율이 높았다. VSS 제거량당 TVFA의 생성율은 미처리, $CaC0_3$, CaO 순이었으며 부하량이 높을수록 높게 나타났다. TVFA와 SCOD의 상관관계는 CaO처리시 TVFA = $0.8656{\times}SCOD$-295.62였으며 이때의 $R^2$ 값은 0.8589였다. 종합적으로 본 공정의 현장 적용시 음식물 쓰레기의 NaCl 농도를 고려하여 최대의 부하량으로 운전하는 것이 타당할 것으로 판단되며. 전처리로는 CaO에 의한 전처리가 적합한 것으로 사료된다.

Keywords

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