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 2):99-103.
Wastewater Treatment Project of a Waste Vegetable Disposal Plant in Yunnan
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
2 2
Page:
99-103
Column:
Date of publication:
2021-01-17
- 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.
Last Update:
2021-01-17