摘要
现场试验表明,SR系统处理城市污水,对TK—N、NH_4—N和T—P的总去除率达90％以上;出水中NO_3—N虽有增加,但总均值<2mg/1,远低于饮水标准(20mg/1);各组分出水水质符合工艺要求。根据试验结果和有关资料,为本地区的SR系统提出如下工艺指标:水力负荷150cm/年,2次/月,9cm/次;氮负荷500kg/ha·年(旱地)和250kg/ha·年(水田);磷负荷分别为150kg/ha·年和75kg/ha·年;进水中氮的控制浓度30～40mg/1(旱地)和15～20mg/1(水田),磷的控制浓度均为10mg/1。
The field experiments were conducted to treate wastewater by SR system, in east suburb of Tianjin. The results showed that total removal rates of TK-N, NH_4-N and T-P are over 90％, and the effluent quality can meet the standards of the treatment. Total average value of NO_3- Nin effluents, was below 2mg/1 which was much tess than drinking water standard, 20mg/1. On the basis of the results, the process conditions have been suggested for the SR system as follows: hydraulic loading rate is 150cm/year, which is to irrigate twice a month and 9cm each time; nitrogen loading rate is 500kg/ha·year in upland field and 250kg/ha·year in paddy field; Phosphorus loading rate is 150kg/ha·year and 75kg/ha·year respectively; control concentration of total nitrogen in the inffuent is 30-40mg/1 in upland field and 15-20mg/1 in paddy field; control concentration of total phosphorus is 10mg/1.
出处
《农业环境保护》
CSCD
1992年第1期3-10,共8页
Agro-Environmental Protection
