添加霍甫水丝蚓对活性污泥系统运转效能及微型动物群落结构的影响  

Effect of adding Limnodrilus hoffmeisteri on performance of activated sludge and microfauna structure of wastewater treatment system

作　　者：管越强[1] 杨秀芬[1] 张娜[1] 周可新[2] 

机构地区：[1]河北大学生命科学学院,保定071002 [2]环境保护部南京环境科学研究所,南京210042

出　　处：《环境工程学报》2013年第1期377-383,共7页Chinese Journal of Environmental Engineering

基　　金：河北省自然科学基金项目(C2006000973;C2010000253)

摘　　要：研究了实验室模拟条件下添加霍甫水丝蚓(Limnodrilus hoffmeisteri)对活性污泥水处理系统的影响。实验设对照组和实验组各一个,各设3个平行缸,实验组每缸添加水丝蚓100条,每个批次的实验周期为20 h,循环7 d。结果显示,实验组和对照组的出水COD去除率分别为(69.6±1.7)%和(67.9±2.5)%,两者无显著差异;实验组和对照组的活性污泥沉降比SV(%)分别为(16.39±0.30)%和(16.98±0.46)%,活性污泥浓度MLSS分别为(2.48±0.16)g/L和(2.61±0.12)g/L,活性污泥指数SVI分别为(66.35±3.51)和(65.19±2.57)mL/g,两组的SV和MLSS差异显著,说明添加水丝蚓在短期内起到减少污泥量、提高污泥沉降性能的作用。添加霍夫水丝蚓短期内不影响微型动物的种类组成,但使原生动物总密度下降。实验组和对照组污泥生物指数SBI均为7,质量等级为Ⅱ。上述结果可为剩余污泥减量化应用提供参考依据。The effect of adding Limnodrilus hoffmeisteri, which belongs to Tubidicidae, on the activated sludge wastewater treatment system was studied under laboratory modulated conditions. The experiment consists of one experimental group and one control group with triplicate tanks. In each experimental tank, 100 worms were added at the beginning. The experimental cycle of each batch was 20 h and the whole experiment lasted 7 d. The results showed that there was no significant difference in removal efficiency of COD between the experi- mental and the control groups, （69.6 ± 1.7） % vs. （67.9 ± 2.5） %. Setting velosity （ SV, % ）, mixed liquor suspended solids（MLSS） and sludge volume index （SVI） of the experimental group were （ 16.39 ± 0.30） %, （2.48±0. 16） g/L and （66.35 ±3.51 ） mL/g, respectively, whereas these of the control group were （16.98 ± 0.46）% , （2.61 ± 0. 12） g/L and （65.19 ±2.57） mL/g. The difference of SV and MLSS between the two groups was statistically significant, which indicated that L. hoffmeisteri supplementation minimized excess sludge production and improved the sludge performance in short term. In addition, supplementation of L. hoffmeisteri has little impact on the species composition of microfauna, but leads to decrease of protozoan density in short term. Sludge biotic index （SBI） of each treatment was 7 and the quality class belongs to Ⅱ. The results could provide references for the minimization of excess sludge production in the activated sludge system.

关 键 词：污水 活性污泥 霍甫水丝蚓 剩余污泥 微型动物群落 

分 类 号：X703[环境科学与工程—环境工程]