混合液及污泥回流比对MUCT工艺缺氧吸磷的影响

以C/N值较低的模拟生活污水为处理对象,研究了当硝化液回流比保持不变时,混合液回流比(r)和污泥回流比(s)对MUCT工艺缺氧吸磷的影响.结果表明:当r和s均为1时,缺氧区2和缺氧区3中的DPB利用厌氧段储存的大量PHB为碳源,以硝酸盐氮为电子受体进行吸磷,吸磷量分别稳定在132.91 mg/h和105.38 mg/h左右,缺氧吸磷率维持在46.58%左右;r和s对COD总去除率的影响不大,系统对COD、NH+4 -N、TP的去除率分别达到91.86%、98.83%和90%,出水COD、NH+4-N和11P分别在30、0.8和0.9 mg/L以下.     

Denitrifying phosphorous removal in anaerobic/anoxic SBR system with different startup operation mode

To achieve stable and efficient nitrogen and phosphorus removal and to investigate the characteristics of the A/A SBR enriched with denitrifying phosphorus removal bacteria(DPB),the whole course of startup was studied with two reactors operated in different mode.The reactor I was operated under anaerobic/settling/anoxic/settling mode,and the reactor II was operated under anaerobic/anoxic/settling mode.Differences between the two reactors in removal efficiency of COD,nitrogen and phosphorus were examined.The results indicated that efficient performance could be achieved in both reactors with different startup operation mode,while the phosphorus removal efficiency was improved sooner in reactor I than in reactor II,which suggested that reactor I would supply a more favorable condition for DPB proliferation.Meanwhile,it was observed that the amount of organic substrates consumption had a linear correlation to that of phosphorus release in anaerobic phase when DPB was accumulated in the A/A SBR denitrifying phosphorus removal system.     

回流臭氧化污泥对污水处理系统影响的研究进展

目前,大部分污水处理厂采用活性污泥处理技术,其弊端是产生大量的剩余污泥,而剩余污泥的处置已成为最主要的难题．因此,在其背景下提出了污泥减量技术,臭氧以其独特的强氧化性被应用到污泥减量技术中．笔者介绍了臭氧化污泥减量的机理：总结了近期臭氧化污泥在各处理系统中对硝化、反硝化及除磷方面的进展;提出了臭氧化污泥减量技术有待解决的问题．     

腐殖土强化SBR工艺运行效能试验

为考察腐殖土填料强化SBR工艺处理生活污水的效能,将添加腐殖土填料的SBR反应器与传统方式运行的SBR反应器进行对比试验.结果表明,腐殖土填料可以提高腐殖土填料SBR反应器对有机物的降解速率,在相同的运行条件下可以提前30 min完成有机物的氧化;在硝化阶段,腐殖土填料有助于活性污泥发生好氧同步硝化反硝化现象,相比传统的SBR工艺反应器对NH4+-N和TN的去除率提高了6%和5%以上.腐殖土的添加缩短了SBR工艺的有机物氧化时间,提高了硝化速率和硝化程度,对于提高处理效率和降低运行费用具有重要意义.     

臭氧破解污泥效能评价指标选择与应用

为解决污泥臭氧化过程中评价指标不统一问题,考察溶解性化学需氧量(SCOD)、颗粒性化学需氧量(PCOD)、总有机碳(TOC)和挥发性悬浮固体物质(VSS)在污泥臭氧化过程中的表现及相关性,筛选出合适的评价指标,并以此为基础评价过氧化氢和pH对污泥臭氧氧化的影响.结果表明,臭氧消耗量<207.6±7.2mg/gSS时,可将TOC作为首选指标,如超过此范围,可选用SCOD和PCOD作为评价指标.过氧化氢与臭氧最佳摩尔比为1.2,最佳pH为6.     

臭氧投量对活性污泥特性参数的影响

通过试验分析和探讨了臭氧投量对活性污泥特性参数的影响.结果表明,随着臭氧投量的增加,SS和VSS呈明显降低的趋势,而活性污泥上清液中的SCOD、蛋白质、总氮及硝酸盐氮则增加;氨氮浓度总体上随臭氧投量的增加而增加,但在投量为95～137 h mgO3/gSS时有所下降,随后又明显增加;当臭氧投量<137 mgO3/gSS时,亚硝酸盐氮呈增加趋势,随后开始明显降低;当臭氧投量<211 mgO3/SSS时,TOC和多糖随臭氧投量的增加而增加,随后开始下降.