摘要
为解决污水厂在冬季脱氮效果欠佳的问题，将水解酸化与反硝化过程耦合于水解池中而形成水解反硝化工艺。在温度为10．3～17．6cc条件下，利用水解反硝化工艺处理城镇污水，当进水COD、NH；-N、TN和TP的平均浓度分别为446、23．6、36．5和7．3mg／L时，对其平均去除率分别为93．6％、96．6％、75．6％、92．3％；在无外加碳源的条件下，出水COD、NH4-N、TN浓度均可达到一级A排放标准，通过投加少量化学除磷药剂也可实现TP浓度达标排放。在温度为8℃条件下，水解反硝化工艺中污泥的比脱氮速率是AAO工艺中缺氧池污泥的1．6倍，而反硝化所消耗的碳源仅为缺氧池污泥的81．7％。
In order to improve poor denitrification in the WWTP in winter, a hydrolysis-denitrifica- tion technology was developed by coupling hydrolysis acidification with denitrifieation in the hydrolysis tank. The hydrolysis-denitrification technology was used to treat municipal sewage. At temperature of 10.3 to 17.6 ℃, when the average influent concentrations of COD, NH4＋ -N, TN and TP were 446 mg/L, 23.6 mg/L, 36.5 mg/L and 7.3 mg/L, the corresponding removal rates were 93.6%, 96.6%, 75.6% and 92.3% , respectively. The effluent COD, NH4 - N and TN could meet the first level A cri- teria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant （GB 18918 - 2002） in the absence of external carbon source. By adding a small amount of reagent, TP could also meet the discharge standard. The specific denitrifieation rate of hydrolysis-denitrification sludge was 1.6 times that of anoxic sludge in AAO, and the carbon consumption rate was only 81.7% of the anoxic sludge rate at temperature of 8 ℃.
出处
《中国给水排水》
CAS
CSCD
北大核心
2013年第15期1-4,共4页
China Water & Wastewater
关键词
水解
反硝化
脱氮除磷
低温
比脱氮速率
hydrolysis
denitrification
nitrogen and phosphorus removal
low temperature
specific denitrification rate
