改性硅藻土处理城市污水技术的可行性研究

文章分析了改性硅藻土处理城市污水技术的原理,指出改型硅藻土相对于一般的铝盐、铁盐等污水处理剂具有污水处理的效果稳定、产生二次污染少、可回收利用空间大、价格低廉等优点;并提出该技术的常规工艺流程和改进工艺流程,从而从理论上说明该技术在技术上是可行的。结果表明,该技术对COD和BOD5去除效率分别达到70%和73%左右,对SS和TP的去除率分别>94%和92%,从而进一步验证该技术的技术可行性。参照一般的化学强化一级处理技术的经济费用,分析了该技术在经济上的可行性。

Feasibility Study on Application of Refined and Modified Diatomaceous Earth to Treating Municipal Wastewater

Mechanism of the role that refined and modified diatomaceous earth plays as a kind of chemicals in CEPT (chemical enhanced primary treatment) of sewage is analyzedn An in-site experiment was conducted at a sewage treatment plant in Shanghai, which shows that use of refined and modified diatomaceous earth with a dosage of 50mg/L can obtain 70% or more removals of COD and BOD, and more than 90% removal of both SS and TP. Other merits mentioned are low cost of operation, easiness in sludge handling and disposal.