CAJ | 학술논문

为了利用摇蚊幼虫改善活性污泥的沉降性能，以摇蚊幼虫为研究对象，考查其对污泥沉降性能改善作用的影响因素并探究改善机理.结果表明：投加摇蚊幼虫可以在短时间内明显改善污泥的沉降性能.在投加幼虫密度为每克干污泥中含0.2~1.2 g湿质量摇蚊幼虫时，污泥沉降性能改善效果随虫密度增加而增加.在相同虫密度(每克干污泥中含1.0 g湿质量摇蚊幼虫)的情况下，摇蚊幼虫对污泥质量浓度为5 g/L的活性污泥改善效果最佳.而摇蚊幼虫对污泥沉降性的改善作用与投加摇蚊幼虫后活性污泥2种主要胞外聚合物(蛋白质、多糖)含量以及蛋白质与多糖比值的降低有关.另外，长期试验证实，向污水处理反应器中连续回流摇蚊幼虫培养装置上清液可以使污泥容积指数由120 mL/g降至60 mg/L.
위료이용요문유충개선활성오니적침강성능，이요문유충위연구대상，고사기대오니침강성능개선작용적영향인소병탐구개선궤리.결과표명：투가요문유충가이재단시간내명현개선오니적침강성능.재투가유충밀도위매극간오니중함0.2~1.2 g습질량요문유충시，오니침강성능개선효과수충밀도증가이증가.재상동충밀도(매극간오니중함1.0 g습질량요문유충)적정황하，요문유충대오니질량농도위5 g/L적활성오니개선효과최가.이요문유충대오니침강성적개선작용여투가요문유충후활성오니2충주요포외취합물(단백질、다당)함량이급단백질여다당비치적강저유관.령외，장기시험증실，향오수처리반응기중련속회류요문유충배양장치상청액가이사오니용적지수유120 mL/g강지60 mg/L.
In order to imporve the activated sludge settling performance by using chironomid larvae ( CL) , the effect and mechanism of CL on activated sludge settling performance were investigated in this study. The results show that the adding of CL enhances the sludge settling performance in a short time. The improvement performance becomes significant as the CL density increased from 0. 2 to 1. 2 g wet mass of CL per g dry mass of activated sludge. There is a suitable sludge concentration (5 g/L) in achieving settleability improvement at the same CL density ( 1. 0 g wet mass of CL per g dry mass of activated sludge) . The introduction of CL reduces the contents of protein and polysaccharide and the ratio of protein to polysaccharide in extracellular polymeric substance ( EPS) , which is probably the main reason for CL improving the sludge settling performance. Furthermore, the long-term experiment confirms that adding the supernatant from the CL reactor to the sequencing batch reactor ( SBR) for treating domestic wastewater reduces the sludge volume index ( SVI) from 120 mL/g to 60 mL/g.