人工湿地不同的水流方式和基质对氮和磷的净化的比较

比较了在两种污水浓度下,人工湿地选用不同基质和水流方式时的处理效果,旨在通过试验,找到处理污水的最佳基质和水流方式.结果表明,对于高浓度污水,将陶粒和蛭石结合作为人工湿地基质,对总氮和COD的处理效果较好;水流方式采用表面流和垂直流串联搭配时,污水处理负荷较大,出水水质高.对于低浓度污水,选用陶粒和腐殖质作为基质,出水水质较好.人工湿地基质是影响磷的处理效果的主要因素,选用富含氧化铁的炉渣作为基质时处理效果最好,通过合理的操作方式可以最终从污水中除磷.

Comparison on the Different Stuffing and Flow Style Removel of Nitrogen and Phosphorus in Constructed Wetlands

To find the optimal stuffing and flow systems for constructed weltand in case of high-concentration and light-concentration wastewater,treatment effectiveness of constructed weltand with different stuffing and different flow systems are studied in this paper.The result shows that for high-concentration wastewater, the removal rate of TN(Total Nitrogen) and COD are higher when haydite and vermiculite are selected as the stuffing of constructed weltand;the wastewater treatment load is bigger and the effluent quality is higher when surface flow system and vertical flow system are connected in series.For light-concentration wastewater,the effluent quality is better when haydite and humus are selected as the stuffing of constructed weltand.Stuffing play the vital role in the removal of phosphorus.The removal rate of phosphorus is better when slag which contains ferric oxide is chosen to be the stuffing.Phosphorus can be removed from the wastewater by exact operation mode with this kind of slag.