晶析法による養豚廃水中の窒素、リン、カリウム同時回収の生物処理への影響晶析法による養豚廃水中の窒素、リン、カリウム同時回収の生物処理への影響 Infuluence of Simultaneously Recovering Ammonium,Phosphorous and Potasium by Crystallization from Swine Wastewater on Biological Treatment
In order to clarify the influence of pH, cation, etc. of solution after simultaneously recovering ammonium, phosphorus and potassium from swine wastewater on biological treatment, the solution was biorogically treated with an intermittent aeration process. An inhibition of TOC and T-N removal was not found although the concentration of Na and Cl exceeded the concentration which was reported to cause inhibition. Even if pH was 9.5, the inhibition was not found. On the contrary, at a pH of 9.5 biological removal of TOC and T-N was promoted. It was considered that simultaneously recovering ammonium, phosphorus and potassium by crystallization from swine wastewater would not hinder biological treatment.