溶解氧对低碳源污水一体化处理工艺脱氮除磷的影响  

Influence of dissolved oxygen on nitrogen and phosphorus removal in integration treatment process of low-carbon source sewage

作　　者：吉芳英[1] 金展[1] 郭倩[1] 徐璇[1] 李琪[1] 

机构地区：[1]重庆大学三峡库区生态环境教育部重点实验室,重庆400045

出　　处：《给水排水》2014年第5期129-133,共5页Water & Wastewater Engineering

基　　金：国家水体污染控制与治理科技重大专项(2013ZX07315001);国家自然科学基金项目(51108483);重庆市自然科学基金项目(cstcjjA20002)

摘　　要：通过试验对比,研究了溶解氧对低碳源污水一体化工艺脱氮除磷效果的影响。结果表明,平均溶解氧为0.18mg/L时,系统出水可以稳定达到GB 18918—2002一级A标准,溶解氧过高或过低都会降低系统脱氮除磷效果。在平均溶解氧为0.18mg/L的工况下,系统存在反硝化吸磷、同时硝化反硝化及全程反硝化3种脱氮方式,且反硝化吸磷和同时硝化反硝化脱氮量占氮总去除量的66.7%,可以较大程度降低脱氮除磷过程所需碳源量并节省耗氧量,提高低碳源污水脱氮除磷效果。Through comparative experiment, the effects of dissolved oxygen（DO） on the removal of ni- trogen and phosphorus from low carbon source sewage in integrated process were studied. The results showed the effluent could meet the first grade of standard A of GB 18918--2002 when the DO was 0. 18 mg/L. However, the removal efficiency would be suppressed when the DO was too high or too low. Under the operation situation of 0. 18 mg/L average DO, there were three nitrogen removal processes in the system simultaneously, which included denitrifying phosphorus adsorption, simultanoues nitrifica- tion and denitrification, and whole process denitrification. Meanwhile, the nitrogen removed by the firest two procecces accounted for 66. 7% of total removed nitrogen. It means that this operation situation would greatly reduce the need of carbon and oxygen in removal of nitrogen and phophorus process and improve the removal effects in low carbon sewage.

关 键 词：生物脱氮 溶解氧 同时硝化反硝化 反硝化吸磷 侧流除磷 

分 类 号：X703[环境科学与工程—环境工程]