摘要：
对污水厂出水经过深度处理后回用到循环水系统作为补充水，且循环水排污又回流到污水厂的系统，将产生内循环浓缩，使TDS和COD升高，由于循环系统补充水有TDS上限值，污水循环回用比也存在上限值。提出了污水循环回用比和回用后污水厂出水COD的确定方法。
关键词:
污水回用,
循环回用比,
总溶解固体,
循环水系统
Abstract:
After the effluent from wastewater treatment plant is treated, it will go back to the circulating water system and be recycled as make-up water.During this procees, the inner circulating concentration will increase, making the TDS and COD get higher.Since the TDS of make-up water has an upper limit, the circulating recycle ratio of wastewater has an upper limit as well.The method of determining wastewater recycle ratio and the COD of the effluent from wastewater treatment plant after being recycled is given.
Key words:
wastewater recycle,
circulating recycle ratio,
total dissoloved solid,
circulating cooling water system
中图分类号:
安景辉. 污水循环回用比及污水厂出水COD变化分析[J]. 工业水处理, 2008, 28(6): 82-85.
An Jinghui. Analysis of wastewater recycle ratio and effluent COD variation at the wastewater treatment plant[J]. INDUSTRIAL WATER TREATMENT, 2008, 28(6): 82-85.