东辛油田辛一污水处理站因污水处理设施老化，所加药剂与水质的配伍性较差，使回注于地层的污水水质不达标。作者较详细地介绍了辛一污水处理站通过改造污水处理流程，利用流程中沉降、过滤技术，优选污水处理剂，使处理后的污水水质有明显的改善，回注污水水质达标。

Since the wastewater treatment equipment in Xinyi Effluent Treatment Station of Dongxin Oil Fild wasgetting aged,the compatibility of the chemicalsand water quality waspoor and the water quality of the effluent re-injected into the stratum could not come up to the standard.The flow processreform of the effluent treatment in Xinyi Effluent Treatment Station isintroduced in detail.Now the water quality of the treated effluent isimproved remarkably and the water quality of the re-injection effluent can come up to the standard by using the settling and filtration techniquesand optimizing effluent treatment agents.