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厨余垃圾渗滤液作为低碳氮比废水处理外加碳源的脱氮性能研究
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Abstract:
厨余垃圾渗滤液有机物含量高，可生化性强，将厨余垃圾渗滤协同处理低碳氮比废水，不仅可以降低废水处理成本，而且可以实现以废治废。针对厨余垃圾渗滤液作为外加碳源对于低碳氮比废水处理的脱氮性能研究，在不同COD/TN条件下将厨余垃圾渗滤液与传统碳源甲醇、乙酸钠的反硝化性能进行对比，结果表明：当COD/TN = 6时，反硝化速率厨余垃圾渗滤液 > 乙酸钠 > 甲醇，分别为18.77 mg /(gVSS？h)、15.84 mg /(gVSS？h)、9.09 mg /(gVSS？h)；总氮去除率厨余垃圾渗滤液 > 乙酸钠 > 甲醇，分别为91.72%、90.98%、75.18%；将厨余垃圾渗滤液作为外加碳源实际应用到某有机资源处理中心废水处理中，废水处理工艺的生化系统运行稳定。
The kitchen waste leachate contains high organic matter, and its biodegradability is strong. Collab-orative treatment of low carbon nitrogen ratio wastewater through kitchen waste leachate can not only reduce the cost of wastewater treatment, but also realize waste treatment by waste. Aiming at the research on the nitrogen removal performance of kitchen waste leachate as an external carbon source for low carbon ratio wastewater treatment, the denitrification effect of kitchen waste leach-ate with traditional carbon sources methanol and sodium acetate was compared under different COD/TN conditions. The results showed that: When COD/TN = 6, the order of the denitrification rate is: kitchen waste leachate: 18.77 mg /(gVSS？h) > sodium acetate: 15.84 mg /(gVSS？h) > methanol: 9.09 mg /(gVSS？h); the order of total nitrogen removal rates is: kitchen waste leachate: 91.72% > sodium acetate: 90.98% > methanol: 75.18%. The kitchen waste leachate was actually applied to the wastewater treatment of an organic resource treatment center as an external carbon source, and the biochemical system of the wastewater treatment process op-erated stably.
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