PAC-SMBR处理低温低浊微污染原水的研究

目的为解决低温低浊微污染原水难于处理的问题．方法以松花江水为研究对象，考察粉末活性炭-淹没式膜生物反应器（PAC-SMBR）组合工艺对低温低浊微污染原水的浊度、有机物处理效果及对膜过滤性能的影响，并与常规水处理工艺滤后出水进行对比．结果试验结果表明，该工艺对浊度的去除率在90％以上，出水浊度在0．2～0．5NTU，对CODMn和UV254的去除率分别可达50％～65％和33％～65％，组合工艺中膜过滤周期较长，可达60～70h．结论PAC-SMBR出水水质优于常规工艺滤后水质，在低温低浊时，PAC-SMBR组合工艺可取代滤池运行．     

Decreasing residual aluminum level in drinking water

The relativity of coagulant dosage, residual turbidity, temperature, pH etc. with residual aluminum concentration were investigated, and several important conclusions were achieved. Firstly, dosage of alum-coagulant or PACl influences residual aluminum concentration greatly. There is an optimal-dosage-to-aluminum, a bit less thanthe optimal-dosage-to-turbidity. Secondly, it proposes that decreasing residual aluminum concentration can be theoretically divided into two methods, either decreasing (even removing) the concentration of particulate aluminum component, or decreasing dissolved aluminum. In these tests there is an optimal value of residual turbidity of postprecipitation at 7.0 NTU. Thirdly, residual aluminum level will increase while water temperature goes higher. At the last, optimal pH value corresponds a minimum dissolved aluminum at a given turbidity. Data shows the optimal pH value decreases with water temperature‘s increasing.     

深圳供水厂生产废水优化节水的试验研究

为了降低水厂自用水量,节约水资源,在深圳S供水厂进行了生产废水优化节水的试验研究.通过提出水厂各排泥构筑物的优化节水排泥工况,S水厂的耗水率由原来的3.5%降到了2.1%,水厂节约用水量为42.42×104m3/a,同时每年节省生产成本为49.19万元.S水厂回用工艺每年可以为水厂节省生产成本为48.66万元,节省制水成本为0.013元/m3.因此,建议在深圳等水资源费较高的地区的供水厂内增建生产废水的回收处理工艺.