餐厨垃圾污泥共发酵强化低C/NA_(2)O脱氮除磷

Study on Enhancement of Nitrogen and Phosphorus Removal of A^(2)O with Low C/N by Co-fermentation of Kitchen Waste and Sludge

为寻求餐厨垃圾污泥资源化利用方式,明晰共发酵产酸对厌氧-缺氧-好氧(A^(2)O)工艺脱氮除磷强化效果。研究共发酵产酸对强化生物反硝化可行性,对比研究传统碳源和发酵液对A^(2)O工艺脱氮除磷性能的影响,并解析该过程的微生物群落特性。结果表明,采用餐饮垃圾和污泥共发酵产物可作为生物脱氮除磷碳源,反硝化效率为5.31mg/(g·h);与甲醇作为碳源相比,发酵液对NH_(4)^(+)-N和TP的去除效果分别提高2.04和4.84百分点;而对TN的去除差别较小。采用不同的碳源,活性污泥中微生物群落组成发生显著差别,发酵液作为碳源优势菌群为Rhodocyclaceae。

In order to find a resource utilization method of kitchen waste and sludge,and clarify the enhancement effect of kitchen waste and sludge cofermentation on nitrogen and phosphorus removal in anaerobic/anoxic/aerobic(A^(2)O)process.The feasibility of co-fermentation for acid production to enhanced biological denitrification was studied,and the effect of traditional carbon source and fermentation liquor on the performance of nitrogen and phosphorus removal in A^(2)O process was compared.The microbial community characteristics of this process were analyzed.The results showed that,the products of kitchen waste and sludge co-fermentation could be used as carbon source for biological nitrogen and phosphorus removal,and the denitrification efficiency was 5.31 mg/(g·h).Compared with methanol as carbon source,the removal effect of NH_(4)^(+)-N and TP by fermentation liquor was increased by 2.04% and 4.84% percentage points respectively,while the difference in the removal of TN was small.The composition of microbial community in activated sludge was significantly different with different carbon sources,and Rhodocycleae was the dominant flora when fermentation liquor was as carbon source.