混凝加SBR组合工艺处理餐饮废水实验研究

Study on Restaurant Wastewater Treatment with Combined Process of Coagulation and SBR

通过检测并分析餐饮废水水质特点,以出水水质达到GB 18918-2002《城镇污水处理厂污染物排放标准》中规定的一级B标准为目标,探讨了混凝加SBR组合工艺对餐饮废水的处理。研究发现,对于COD均值在3 000 mg/L左右的餐饮废水,在混凝阶段,PAC(50 mg/L)加PAM(30 mg/L)为最佳混凝药剂组合,可使混凝后的餐饮废水COD在480 mg/L左右;在SBR阶段,污泥质量浓度在3 g/L以上、SVI为100～150 mL/g、水力停留时间不少于6 h时出水水质可稳定达到一级B的排放标准。

Aiming at making the effluent water quality meet the standard of first level（B） stated in＂Discharge standard of pollutants for municipal wastewater treatment plant＂（GB 18918-2002）,the processes of coagulation plus SBR was discussed by testing and analysing the characteristics of restaurant wastewater’s quality.The study found that when treating the restaurant wastewater whose original average COD concentration is about 3 000 mg/L,PAC（50 mg/L） ＋ PAM（30 mg/L） is the best coagulant combination during its coagulation period,decreasing the wastewater’s COD concentration to about 480 mg/L;in its SBR period,the effluent water quality can achieve the first level（B） of discharge standard when the activated sludge’s concentration is over than 3 g/L and SVI is 100～150 mL/g with no less than 6 hours of hydraulic retention time.