浮动湿地构建技术及其对再生水受纳水体水质的净化作用OACSTPCD

The comparative selection of three types of eco-floating wetland carrier fiber materials—polyester fiber,polypropylene fiber,and coconut shell fiber—was conducted,and the purification effect of eco-floating wetland technology on receiving water bodies with reclaimed water was examined.The results indicated that the strength of polyester fiber was 1.18 cN/dtex,which was higher than that of polypropylene fiber and coconut shell fiber;the elongation at break among the three fibers does not differ significantly.The contact angle of polyester fiber was 18.2°,indicating it more hydrophilic compared to polypropylene fiber and coconut shell fiber.Additionally,the rate and total amount of microbial attachment on polyester fiber were greater than those of the other two fibers,making it more suitable for use as an eco-floating bed carrier.Bottom aeration(aeration depth of 1.2 m)could significantly improve the removal effect of pollutants from the water body by the eco-floating wetland.Increased oxygenation was beneficial for removal of CODCr,ammonia nitrogen and TN,but had little effect on the removal of TP.The purification effect on receiving water bodies with reclaimed water indicates that the bottom oxygen supply-eco-floating wetland technology effectively removes the main pollutants from lake water,with the main water quality indicators meeting the Class Ⅳ water quality standards of Environmental Quality Standards for Surface Water(GB 3838-2002).