公开(公告)号：US4049545A

公开(公告)日：1977-09-20

申请号：US703549

申请日：1976-07-08

申请人： Peter J. Horvath

发明人： Peter J. Horvath

IPC分类号： C02F1/52 ,  C02F1/66 ,  C02F1/72 ,  C02F1/78 ,  C02F3/12 ,  C02F9/00 ,  C02B1/20

CPC分类号： C02F3/1215 ,  C02F1/52 ,  C02F1/5236 ,  C02F1/66 ,  C02F1/72 ,  C02F9/00 ,  C02F1/78 ,  Y02W10/15 ,  Y02W10/37

摘要： A method of treating domestic, commercial or industrial waste water which includes the steps of mixing the waste water with a coagulant aid so as to bring the pH of the mixture to within a range of about 9.0-10.5, and thereafter adding precipitating agents in at least two successive steps so as to lower the pH of the mixture by about one unit for each step and thereby precipitate solids therefrom until the mixture is approximately neutral. After the addition of each precipitating agent, the precipitated solids are separated from the waste water effluent before the next succeeding precipitating agent is added. Preferably two such successive precipitation steps are performed, after which the resultant waste water effluent is treated with an oxidizing and disinfecting agent, filtered, and then treated with a further oxidizing and disinfecting agent to minimize the B.O.D. level. In the course of the process, a portion of the solids separated from the waste water effluent in the respective steps is preferably recycled into the treatment system by mixing it with new incoming waste water to partially take the place of the original coagulant aid. The preferred coagulant aid utilized is portland cement, with aluminum sulfate and copper sulfate preferably being used in sequence as the precipitating agents and potassium permanganate and ozone being used in sequence as the oxidizing and disinfecting agents.

摘要翻译： 一种处理家用，商业或工业废水的方法，其包括将废水与助凝剂混合以使混合物的pH达到约9.0-10.5的范围，然后将沉淀剂加入到 至少两个连续的步骤，以便每个步骤将混合物的pH降低大约一个单位，从而从其中沉淀出固体，直到混合物近似为中性。 加入每种沉淀剂后，将沉淀的固体与废水流出物分离，然后再加入下一个沉淀剂。 优选进行两个这样的连续沉淀步骤，然后用氧化和消毒剂处理所得废水流出物，过滤，然后用另外的氧化和消毒剂处理以最小化B.O.D. 水平。 在该过程中，在相应步骤中从废水流出物分离出的固体的一部分优选通过将其与新进入的废水混合而再次进入处理系统，以部分代替原始的助凝剂。 优选的助凝剂是波特兰水泥，硫酸铝和硫酸铜优选依次用作沉淀剂，高锰酸钾和臭氧按顺序用作氧化和消毒剂。