功能菌株对柠檬酸废水生化处理剩余污泥减量化研究

采用具有污泥减量化功能的菌株,对柠檬酸发酵废水生化处理二沉池剩余污泥进行摇瓶减量实验。通过对初筛菌株进行定向驯化,再通过正交试验与单因素实验,确定菌株污泥处理优化培养条件后进行优选菌株污泥最终处理。研究结果表明:经过4个周期的驯化,菌株W1-6、W1-10好氧处理后污泥MLSS减量与同期对照相比分别从17.62%提高到24.61%和从16.60%提高到23.17%。在优化培养条件下,污泥MLSS与MLVSS分别减量27%和40%以上,污泥清液中SCOD值从521.7mg/L提高到1700mg/L左右,原污泥91%的SV₃₀可降低到54%~57%。污泥减量效果明显,同时污泥脱水性能也得到明显改善。

Research on Residual Sludge Reduction of Citric Acid Wastewater Biochemical Treatment by Using Function Strains

Function strains have been used for carrying out shake-flash reduction test of the second pond sludge which were derived from citric acid fermentation wastewater. The strains were acclimated by adding sterile original sludge with different concentrations. The optimum cultivate conditions of the strains processing were determined by the orthogonal and single factor tests. Experimental results indicated that the percentage of sludge MLSS reduction with the processing by W1-6 and W1-10 were improved obviously compared with the check sample after 4 cycles acclimation, which increased from 17.62% to 24.61% and 16.60% to 23.17%, respectively. The percentage of sludge MLSS and MLVSS reduction were more than 27% and 40% under the optimum cultivate conditions. The SCOD in sludge centrifugal supernatant were raised from 521.7mg/L to around 1700mg/L, and the SV₃₀ was dropped to 54%-57% from 91%. Therefore, the sludge reduction effect was obvious, and at the same time the sludge dewatering performance significantly improved.