甲酸钠促进厌氧生物降解蔗糖废水的研究

Study on Promoting Anaerobic Biological Degradation of Sucrose Wastewater by Sodium Formate

[目的]探讨甲酸钠在促进蔗糖废水厌氧生物处理方面的可行性。[方法]接种污泥取自上海市某污水厂浓缩池,密封一个星期后使用,实验废水采用自配蔗糖废水,实验分为两个阶段:污泥驯化阶段和负荷提高阶段。采用PCR-DGGE技术对各系统中的污泥样品进行微生物多样性分析。[结果]添加甲酸钠可以促进蔗糖废水厌氧生物系统的启动,提高COD去除率以及系统所能承受的容积负荷,且甲酸钠浓度越高,其促进作用越明显;添加甲酸钠可改善污泥沉降性,增加污泥中的微生物浓度,提高污泥活性,从而提高COD去除率;添加甲酸钠会改变污泥中的微生物种群,提高生物多样性,由此也能提高COD去除率。[结论]甲酸钠在促进蔗糖废水厌氧生物处理方面取得良好效果。

[Objective] The study aimed to explore the feasibility of the sodium formate in promoting the anaerobic biological degradation of the sucrose wastewater.[Method] The inoculated sludge was from the concentrated pool in a sewage plant in Shanghai City,which was sealed a week after use and the experiment waste water was used by the self-made sucrose wastewater.The experiment was divided into two stages： sludge domesticated stage and load improving stage.The sludge samples in each system were made for microbial diversity analysis by PCR-DGGE technology.[Result] The addition of sodium formate could accelerate the startup of the anaerobic biological system,increase the COD removal rate and the volume loading rate（VLR） of the system,and the effect was more significant as the sodium formate concn.was increased.The addition of sodium formate could improve the settleability of sludge,enhance the microbial concn.,increase its microbial activity,thus increase the COD removal rate.The addition of sodium formate also could change the microorganism species and increase the biodiversity,which also could increase the COD removal rate.[Conclusion] The sodium formate got good effect in promoting the anaerobic biological degradation of the sucrose wastewater.