Optimization of phosphorus removal process by chemical method in Baijiu brewing wastewater treatment

In order to optimize the phosphorus removal process by chemical method of Baijiu brewing wastewater treatment process, the effects of initial alkalinity, initial pH, and polyferric sulfate (PFS) on thephosphorus removal of Baijiu brewing wastewater were investigated by single factor test combined with response surface method. The phosphorus removal conditions were optimized, and their feasibility and operational effects were verified in actual wastewater treatment. The results showed that the optimized phosphorus removal process was as follows: initial alkalinity 27 mmol/L, initial pH 7.0, and PFS addition 0.1%. Under these optimal conditions, the highest phosphorus removal efficiency could reach 98.06%, and the initial alkalinity and initial pH were the key factors affecting the phosphorus removal efficiency of polyferric sulfate. In 2023, the phosphorus removal rate in the actual phosphorus removal process by chemical method of Baijiu brewing wastewater could be as high as 98.8%, and the effect was stable, so the optimal phosphorus removal process of Baijiu brewing wastewater had practical and certain reference value.