摘要
将低压射流曝气系统应用于氧化沟中,采用2h曝气,2h停曝的连续运行方式,系统CODCr去除率高达92%,BOD5去除率高于94%,NH3—N去除率达87%,TN去除率高于50%,TP去除率高于72%;测定SVI<80mL/g,活性污泥的外源比耗氧速率为63.7mgO2/(gMLVSS·h)。污泥内源呼吸比耗氧速率为9.8mgO2/(gMLVSS·h)。与常规的活性污泥法相比较,污泥碳化比耗氧速率可提高2～3倍,污泥内源呼吸比耗氧速率提高1～2倍,污泥活性得到较大提高。
In this study, a low-pressure jet aeration system was applied in the process of oxidation ditch, 2 h aeration and 2 h non-aeration as well as continuous inflow and outflow were performed. The results showed that the removal rates of CODcr and NH3-N were 92% and 87%; the removal rates of BOD5, TN and TP were more than 94%, 50%, and 72% respectively. Detected SVI was less than 80 mL/g. Activated sludge specific exogenous respiration rate was 63.7 mgO2/ （gMLVSS·h） and endogenous respiration rate was 9. 8 mgO2/（gMLVSS·h）, which improved 2-3 times and 1-2 times respectively, compared with the rates using conventional activated sludge technique.The sludge activity has been improved significantly.
出处
《给水排水》
CSCD
北大核心
2008年第11期52-55,共4页
Water & Wastewater Engineering
关键词
氧化沟
射流间歇曝气
连续流间歇曝气
呼吸速率
Oxidation ditch
Jet-intermittent aeration
Continous flow-intermittent aeration
Respiration rate
