Abstract: Sludge micro-oxygen hydrolysis fermentation liquid as the carbon source have been used in SBR process operated in anaerobic/aerobic/anoxic mode for treating the urban sewage with low C/N ratio,and the denitrification and dephosphorization capabilities of the system with different C/N ratios are investigated. The results show that with the increase of C/N ratio,the denitrification and dephosphorizaation capabilities of SBR process are enhanced gradually. When C/N ratio is 7 or 8,denitrifying dephosphorization phenomena occur in the system. When C/N=8,highly efficient and synchronous denitrification and dephosphorization are achieved,and the removing rates of COD, NH₄⁺-N,TN and TP are 93.7%,98.9%,84.3% and 96.1% respectively. The effluent water quality reaches Level 1-A standard specified in the Discharge standard of Pollutants for Urban Sewage Treatment Plants(GB 18918-2002).

Key words: sludge micro-aerobic hydrolysis fermentation liquid, carbon source, low C/N ratio, urban sewage

摘要： 采用污泥微氧水解发酵液为碳源用于厌氧/好氧/缺氧模式运行的SBR工艺处理低C/N城市污水，考察了不同C/N下系统的脱氮除磷能力。结果表明：随着C/N的提高，SBR工艺的脱氮除磷效果逐渐强化，当C/N在7、8时，系统内出现了反硝化除磷现象，并在C/N=8时实现了高效同步脱氮除磷，对COD、NH₄⁺-N、TN、TP的去除率分别为93.7%、98.9%、84.3%、96.1%，出水满足《城镇污水处理厂污染物排放标准》（GB 18918—2002）一级A标准。

关键词: 污泥微氧水解发酵液, 碳源, 低C/N, 城市污水

CLC Number: 

• X703.1