摘要
设计了双系列厌氧/缺氧交替运行式A^2O(D-A^2O)中试反应器,进行18个月的生活污水处理的试验研究。研究结果表明,反应器最佳水力停留时间(HRT)为6 h。当气温≥28℃时,温度的影响主要体现在气温方面;当气温<28℃,温度的影响主要体现在水温方面。控制混合液回流比(R)=200%、污泥回流比(r)=100%、双系列厌氧/缺氧交替运行时间(DAOT)=1 h,水温为(22±2)℃时,系统的COD、TN、NH_3-N、TP去除率分别可达94.54%、81.50%、97.73%、94.47%;水温降至(12±1)℃时,COD、TN、NH_3-N、TP去除率分别为87.21%、69.33%、81.29%、75.96%。以剩余污泥经浓缩稳定后的泥水混合液作为学生假期离校后系统的外加碳源,形成应对碳源不足的有效调控策略。分析结果表明,D-A^2O技术中试研究成果具有推广应用的可能性。
A pilot-scale double anaerobic/anoxia alternative operating A2O （D-A2O） reactor was designed to treat sewage from university campus, and the trials lasted 18 months. The results indicated that when the air temperature ≥28 ℃, the influence of temperatures on efficacy of system mainly reflects in air temperature; when the air temperature 〈28 ℃, the influence of temperatures on efficacy of system mainly reflects in sewage temperature. COD, TN, NH3-N and TP removal rate of divisional influent D-A2O were 94.54%, 81.50%, 97.73% and 94.47% at （22±2） ℃, while they could maintain as 87.21%, 69.33%, 81.29% and 75.96% at （12±1） ℃, respectively, under the conditions of HRT 6 h, R 200%, r 100% and DAOT 1 h. The sludge mixed liquor which comes from surplus sludge stabilization was taken as external carbon source, and the adjusting and control strategies of lack of carbon source were established. Based on the analysis results, the research result would be support of popularization and application of D-A2O process.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2016年第9期166-170,共5页
Environmental Science & Technology
基金
国家自然科学基金资助项目(51568066)
关键词
D-A2O
双系列厌氧/缺氧
外加碳源
调控策略
D-A2O
double anaerobic/anoxia
external carbon source
adjusting and control strategies
