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猪场废水厌氧发酵液循环脱氮工艺

Keywords: 猪场废水厌氧发酵液,水解酸化,生物接触氧化,脱氮

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Abstract:

研究了水解酸化与生物接触氧化组合循环工艺处理猪养殖场废水厌氧发酵液的脱氮特性,重点考察了组合工艺的最佳运行工况和参数,同时讨论了组合工艺低温运行的性能。结果表明,水力停留时间24h和污水循环比1∶3为最佳运行工况,此时出水氨氮浓度为2.16~8.20mg/L。溶解氧(DO)浓度2~3mg/L和有机负荷3g/L以下为最佳运行参数,出水氨氮浓度稳定在10mg/L以下。在春季低温条件下(8~12℃),组合工艺也能较好运行,水解酸化池内小分子有机酸产生总量为114.50~244.22mg/L。组合工艺连续运行3个月以上,污染物去除效果稳定。

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