餐厨垃圾水解酸化液作为外加碳源处理养猪废水

Hydrolytic Acidification Solution of Kitchen Waste as an Additional Carbon Source to Treat Pig Wastewater

采用分段进水多级A/O工艺处理低C/N的养猪废水以解决农村地区水污染问题,确定了分段进水的最佳配比为9∶1,但是其出水NH 4+-N仍不能达标。为提高脱氮效果,提出以餐厨垃圾水解酸化液作为处理养猪废水的外加碳源,并与甲醇、葡萄糖、乙酸钠等传统碳源相比较,确定了甲醇、葡萄糖、乙酸钠和餐厨垃圾水解酸化液的最佳C/N分别为4.8、7.3、4.2和5.0。甲醇、乙酸钠、餐厨垃圾水解酸化液在最佳C/N的条件下,多级A/O工艺出水COD分别为319、301、354 mg/L,出水NH 4+-N分别为36、25、22 mg/L,均能达标排放。此外,测定了餐厨垃圾固体物料的生化产沼气潜力(BMP)为546 NmL/gVS,并确定了处理养猪废水与餐厨垃圾的联合工艺布局。

The segmented influent multi-stage A/O process was used to treat low C/N pig wastewater to solve the environmental pollution problem in rural areas.The optimal ratio of segmented influent was determined to be 9∶1,but the concentration of NH 4+-N in the effluent could not meet emission standards.In order to improve the denitrification effect,household kitchen waste hydrolysis acidification solution(KWHAS)as an additional carbon source for treating pig waste water was proposed.Compared with traditional carbon sources for wastewater treatment,the optimum C/N for Methanol,Glucose,Sodium Acetate,and KWL was determined to be 4.8,7.3,4.2,and 5.0.Under the optimal C/N conditions of Methanol,Sodium Acetate and KWHAS,the effluent COD of the multi-stage A/O process was 319,301 and 354 mg/L,and the effluent NH 4+-N was 36,25 and 22 mg/L,respectively.In addition,the BMP of household kitchen waste solid materials was measured to be 546 NmL/gVS,and the structural layout of the combined process of treating pig wastewater and kitchen waste was determined.