Abstract:
A pilot scale hydrolysis/acidification-anaerobism-modified oxidation ditch process for the removal of phos- phorus from mixed urban sewage has been studied, through the regulation and control of HRT of pre-hydrolysis/acidification reactor, HRT of oxidation ditch and sludge reflux ratio of secondary sedimentation tank. The results show that under the following conditions:the influent average concentrations of COD is 557 mg/L, and TP 5.9 mg/L, total HRT 17.5 h, sludge reflux ratio=1, averge DO 2-4 mg/L, and without extra carbon source, the average concentrations of effluent COD and TP are 54.9 mg/L and 0.9 mg/L, respectively, the average removing rates of COD and TP are 90.1% and 86.4%, respectively. It indicates that the hydrolysis/acidification-anaerobism-modified oxidation ditch process has good phosphorus removing effect on mixed urban sewage, being stable and realiable.
Key words:
oxidation ditch,
mixed urban sewage,
dephosphorization
摘要：
采用水解酸化-厌氧-改良氧化沟多点强化氧化沟除磷工艺, 通过对前置水解酸化反应器、氧化沟水力停留时间及二沉池污泥回流比的调控, 对混合型城市污水进行除磷研究。结果表明, 当进水COD、TP平均分别约为557、5.9 mg/L, 总水力停留时间为17.5 h, 污泥回流比为1, 平均DO为2~4 mg/L, 无外加碳源时, 经上述工艺处理后, 出水COD、TP平均分别为54.9、0.9 mg/L, COD、TP平均去除率可分别达到90.1%、86.4%。水解酸化-厌氧-改良氧化沟工艺对混合型城市污水的除磷效果良好、稳定可靠。
关键词:
氧化沟,
混合型城市污水,
除磷
CLC Number:
Wang Sulan, Duan Shengjun, Xing Chuanhong, Hu Guangjie. Experimental research on the modified oxidation ditch process for the removal of phosphorus from urban sewage[J]. INDUSTRIAL WATER TREATMENT, 2015, 35(2): 37-40.
王素兰, 段胜君, 邢传宏, 胡广杰. 改良氧化沟工艺处理城市污水除磷试验研究[J]. 工业水处理, 2015, 35(2): 37-40.