WANG Yuan-fei,LIU Yu,ZOU Qiang,et al.Wastewater Treatment Project of a Waste Vegetable Disposal Plant in Yunnan[J].China Water & Wastewater,2021,37(2):99-103.
云南某废弃菜叶处理厂废水处理工程实例
- Title:
- Wastewater Treatment Project of a Waste Vegetable Disposal Plant in Yunnan
- 摘要:
- 废弃菜叶处理（破碎+厌氧产沼气）过程中产生的废水是一种污染物浓度较高、C/N偏低的废水。云南某废弃菜叶处理厂废水处理工程采用A2O2（二级O池为MBR膜池）工艺，以强化氮的脱除，保证出水TN的达标。对A2O2工艺的启动特性、运行效果及运行费用组成进行了分析。在工艺启动过程中，COD的去除效率可以稳定在70%以上；当硝化反应发生后，对NH4+-N的去除率＞99.5%；投加一定量的碳源后，对TN可以达到较高的去除率。稳定运行后，出水的COD、NH4+-N、TN和TP分别稳定在300、10、45、5 mg/L以下，满足《污水排入城镇下水道水质标准》（GB/T 31962—2015）的C级标准。经测算，处理成本为27.564 元/m3。
- Abstract:
- The wastewater from waste vegetable disposal including crushing and digestion is characterized by high pollutant concentration and low C/N ratio. To enhance the removal efficiency of nitrogen and ensure the discharge standard of total nitrogen, the A2O2 (secondary O tank is MBR) process is adopted to treat wastewater from a waste vegetable leaf disposal plant in Yunnan Province. The start-up characteristics, operation effect and the treatment cost of the A2O2 process were analyzed. In the start-up stage, the COD removal efficiency was above 70%, the ammonia nitrogen removal efficiency was above 99.5% after nitrification, and TN can achieve a high removal rate after adding a certain amount of carbon sources. After stable operation, the effluent COD, ammonia nitrogen, total nitrogen and total phosphorous were below 300, 10, 45 and 5 mg/L respectively, which met level C criteria in Wastewater Quality Standards for Discharge to Municipal Sewers(GB/T 31962-2015). According to calculation, the wastewater treatment cost was 27.564 yuan/m3.
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