摘要
采用城市污水处理厂的初沉污泥进行碳源开发试验。在水解酸化池的HRT为32h、温度为35℃、污泥回流比为1的条件下,考察了SRT对水解酸化效果的影响。结果表明,当SRT=4 d时系统的产酸效果最佳,出水SCOD稳定在1 178.19 mg/L左右,TOC保持在517.34 mg/L左右,水解酸化池的碱度维持在约854.3 mgCaCO3/L;当SRT为10 d时,系统的产酸效果恶化并进入产甲烷阶段。碱度能够反映初沉污泥水解酸化系统的产酸效果,当碱度维持在854.3～1 029.3mgCaCO3/L时,水解酸化系统能够保持良好的产酸效果,这对于提高碳源受限型污水的脱氮除磷效率及降低城市污水处理厂的运行成本具有重要意义。
Carbon source development with hydrolysis and acidification of primary sludge from wastewater treatment plants was studied. The influence of SRT on the hydrolysis and acidification was investigated under the conditions of HRT of 32 h, temperature of 35 ℃ and sludge reflux ratio of 1. The best acidogenesis effect is achieved when SRT is 4 d. The effluent SCOD and TOC are 1 178.19 mg/L and 517.34 mg/L, and the alkalinity of the hydrolysis and acidification tank is 854.3 mgCaCO3/L. When SRT is 10 d, the acidogenesis effect of the hydrolysis and acidification tank is deteriorated. Alkalinity can show the acidogenesis effect of the hydrolysis and acidification system. When alkalinity is 854.3 to 1 029.3 mgCaCO3/L, the system can maintain good acidogenesis effect, which is important for improving nitrogen and phosphorus removal efficiency of carbon source-limited wastewater and reducing the operation cost of municipal WWTP.
出处
《中国给水排水》
CAS
CSCD
北大核心
2009年第5期15-19,共5页
China Water & Wastewater
基金
国家自然科学基金资助项目(50678008)
北京市教委项目(KM200510005006)
北京市属市管高校人才强教计划项目(PHRIHLB)
关键词
初沉污泥
污泥停留时间
产酸效果
碳源
primary sludge
sludge retention time
acidogenesis effect
carbon source
