城市污水厂二级出水脱氮除磷回用于景观水体的试验研究

Study on the secondary effluent reuse for scenic water in an urban wastewater treatment plant by denitrification and phosphorous removal

采用纤维生物膜滤池-强化微絮凝纤维过滤的方法,对城市污水厂二级出水进行深度处理,回用于人工景观水体。试验结果表明出水中总磷一般可达到0.2mg/L以下,氨氮一般可以达到1.5mg/L以下;本试验系统在对氮磷去除的同时,对CODCr、BOD5、SS、浊度等也有进一步的去除作用。试验出水水质可以达到GB3838—2002《地表水环境质量标准》中Ⅲ类水体标准,可满足人工景观用水等高级回用的要求。

An experiment of advanced treatment of secondary effluent in an urban wastewater treatment plant is carried out to produce reclaimed water reused for scenic water, in which the method of combination aerobia biofilm with micro-flocculation fibre filter is used as the main treatment process. The experiment results indicate that: the concentration of total phosphorous and ammonia nitrogen of outlet water is below 0.2 mg/L and 1.5 mg/L respectively; moreover, the CODCr, BOD5, SS, turbidity can be further removed. The quality of outlet water of the experiment meets the Surface Water Environment Quality Standard GB 3838-2002 Ⅲ and meets the requirement of the reuse of reclaimed water for scenic water.