摘要：

采用SSSAB—AFB—MBR工艺处理20 m³/d豆制品生产废水，进水COD_Cr为3 500~7 500 mg/L、氨氮为80~140 mg/L时，平均去除率分别为99.3%、98.3%，出水达到《污水综合排放标准》（GB 8978—1996）一级排放标准要求。设施运行成本为2.75元/m³，吨水占地1.25 m²，总占地面积约25 m²。该工艺中SSSAB的COD_Cr容积负荷高达17.8 kg/（m³·d），出水COD_Cr≤500 mg/L，COD_Cr去除贡献率高达93.7%；AFB氨氮负荷达0.263 kg/（m³·d），出水氨氮≤15 mg/L，氨氮去除贡献率高达99.5%；MBR反应器的COD_Cr平均去除率为70.5%，氨氮平均去除率为54.4%。

关键词: 豆制品废水, 生物法, 生物流化床

Abstract:

The SSSAB-AFB-MBR process was used to treat 20 m³/d soybean production wastewater with the influent COD_Cr 3 500-7 500 mg/L and NH₃-N 80-140 mg/L, and the average removal rate was up to 99.3% and 98.3%. The effluent met the first-level discharge standard of the Comprehensive Wastewater Discharge Standard(GB 8978-1996). The facility operating cost was 2.75 yuan/m³, the area cost per ton of water was 1.25 m², and the total area was about 25 m². In this process, the COD_Cr volume load of SSSAB was up to 17.8 kg/(m³·d), the effluent COD_Cr was less than or equal to 500 mg/L, and the COD_Cr removal contribution rate was up to 93.7%. The ammonia nitrogen load of AFB reached 0.263 kg/(m³·d), the effluent NH₃-N ≤ 15 mg/L, the ammonia nitrogen removal contribution rate is 99.5%. In addition, the COD_Cr average removal rate and the ammonia nitrogen removal rate of MBR reactor are 70.5% and 54.4%, respectively.

Key words: soybean wastewater, biological process, biological fluidized bed

中图分类号: 

• X703