低碳源城市污水化学除磷的研究

Research on chemical dephosphorization from low-carbon municipal sewage

分别采用硫酸铝和改性硅藻土对低碳源城市污水进行化学除磷试验,并对其剂量、除磷效果及成本进行比较分析。研究结果表明:TP=3.5 mg/L时,投加60 mg/L的硫酸铝可使出水TP<1.0 mg/L,而改性硅藻土只需30 mg/L,且效果更稳定,成本也可节省10%;改性硅藻土的投加量为50 mg/L时,出水TP<0.5 mg/L。

Aluminum sulfate and modified diatomite have been used respectively for carrying through the chemical dephosphorization from low-carbon municipal sewage. And,its dosages, dephosphorization effectiveness and operational costs have been compared and analyzed. The results show that when TP=3.5 mg/L,and Al2（SO4）3 dosage is 60 mg/L, the effluent TP is less than 1.0 mg/L. But, more stable effectiveness can be obtained when the dosage of modified diatomite is only 30 mg/L. Furthermore, 10% of operational cost can be saved. The effluent TP will be less than 0.5 mg/L when the dosage of modified diatomite is 50 mg/L.