Abstract

This study was performed about composting in a batch reactor of laboratory scale using garbage waste and swine waste. Sawdust and coconut peat were materials to control optimum moisture, C/N ratio and specific gravity in the study. Comparing compost using only sawdust with compost using sawdust and coconut peat, the latter was higher at reduction rate and decomposition rate. Coconut peat was accelerated aerobic fermentation, because it had moisture holding ability, initial moisture was low, ventilation was good and control of optimum specific gravity was possible. Compost by only garbage waste was under standard of manure. but mixtures in same proportion of garbage waste and swine waste producted high quality compost. CEC value was average 63.8me/100g. The initial C/N ratio of compost was regulated effectively because of high C/N ratio of sawdust. As the C/N ratio(>40) was higher, reduction rate was higher. During the composting C/N ratio was improved more and more.

본 연구는 실험실 규모의 회분식 반응기로 음식물쓰레기와 돈분을 퇴비화하였으며, 수분, C/N비 및 비중 조절재로써 톱밥과 코코넛 피트를 사용하였다. 첨가재로 톱밥만을 이용하여 생산된 퇴비와 톱밥과 코코넛 피트를 이용하여 생산된 퇴비를 비교하여 볼 때, 전자가 후자보다 감량율과 분해율이 약간씩 높게 나타났다. 이는 코코넛 피트가 톱밥보다 보습력이 뛰어났기 때문이며, 초기 수분량이 낮고, 통기성이 좋아 적정의 비중조절이 가능하여 호기성 발효를 촉진할수 있었다. 음식물 쓰레기만에 의한 퇴비는 그 비료성분이 부산물 비료의 기준을 만족시킬 수 없으며, 따라서 음식물쓰레기와 돈분을 동일 비율로 혼합하여 양질의 퇴비를 생산할 수 있었다. CEC값은 평균적으로 63.8me/100g 이었다. 톱밥의 높은 C/N비 때문에 퇴비화 초기의 C/N비는 적절하게 조절되었다. C/N비(>40)가 높을수록 감소율이 컸으며, 퇴비화하는 동안의 C/N비는 점점 향상되었다.

Keywords

• Composting;
• Swine waste;
• Garbage waste;
• C/N ratio;
• Sawdust;
• Coconut peat;
• CEC

• 퇴비화;
• 돈분;
• 음식물쓰레기;
• C/N비;
• 톱밥;
• 코코넛 피트;
• 양이온교환능력;