Abstract:

The efficiency of removing alachlor from water by the integrated process of ferrate oxidation andactivated sludge has been studied. Ferrate can firstly oxidize and degrade the alachlor molecules and then oxidize its degraded intermediates. Under optimal conditions: 40mg/L of alachlor can be removed completely within 10 min. But, the complete mineralization of alachlor cannot be realized. A lot of COD_Cr residue is still in the water body after oxidation. To prolong the ferrate oxidation time can improve the biodegradation capacity of alachlor wastewater, and reduce the inhibitive effect of wastewater on the activated sludge treatment. After the ferrate oxidation wastewater is mixed with municipal sewage according to a certain volumetric ratio, further activate dsludge process can be done to realize complete mineralization.

Key words: alachlor, ferrate oxidation, activated sludge, mineralization

摘要：

研究了高铁氧化-活性污泥耦合工艺去除水中甲草胺的效能。高铁首先氧化废水中的甲草胺分子，然后进一步氧化其降解中间物。在优化工艺条件下，高铁可在10 min内完全去除40mg/L甲草胺，但无法实现对甲草胺的完全矿化，氧化后水体中仍有大量COD_Cr残留。延长高铁氧化时间可提高甲草胺废水的可生化性，并降低废水对活性污泥处理能力的抑制。高铁氧化废水与市政污水按一定体积比混合后，进一步采用活性污泥工艺处理可最终实现对甲草胺的完全矿化过程。

关键词: 甲草胺, 高铁氧化, 活性污泥, 矿化

CLC Number: 

• X703.1