污水土地处理系统ORP变化特征与COD去除率关系的试验研究

污水土地处理技术具有投资少,运行费用低,处理效果好,以及可实现污水处理的无害化、资源化等特点。用污水土地处理系统来处理生活污水,氧化还原环境是一个重要影响因素,而氧化还原电位的高低可以反映系统氧化水平的高低。本论文设计了一个带有多个通气孔的毛管逆滤渗污水处理装置,并用于处理生活污水。试验按照打开通气孔数量的不同被分为全封闭、半封闭（打开8个）和全打开（打开16个）三组同时进行,探讨开启不同数量通气孔时系统内外柱氧化还原电位（ORP）的变化情况以及ORP与系统COD去除率之间的关系,从而为更科学地设计和控制污水处理系统提供依据。试验结果表明：ORP的变化与系统通气性和COD去除率密切相关;系统通气性越好,COD去除率越高。

A Experimental Study to ORP Characteristic and Its Impact for Treatment Removed Ratio of COD in Land Treatment System

Land Treatment System which has the characteristics of low investment and operation charge can achieve the treatment of environment protection. Oxidation Reduction Potential （ORP） has an important impact in the process of wastewater treatment in Land Treatment System, and represents the extent of oxidation. The experimental is divided into three groups at the same time which include closing all the blowholes, opening 8 blowholes and open all the blowholes. The Reversed Capillarity Filtration System （RCFS） with blowholes in outer cylinder is used to dispose wastewater, and investigates the ORP changing with numbers of blowhole in RCFS, and the relations between the ORP and the removed ratio of COD. It can provide the appropriate improvement in designing and controlling the system. The experimental dates shows that the ORP changing is influenced by the condition of ventilation and the removed ratio of COD. The condition of ventilation is much better, the removed ratio of COD is higher.