【摘要】 对广元市污水处理厂在2013～2015年监测数据进行分析,探索了该市城镇污水处理厂尾水水质的特征。结果表明:（1） 2013～2015年各污水处理厂的pH值和TP浓度变化不大,均能达标,尾水大多呈弱碱性。2013年市区大一污水处理厂的尾水排放整体优于其他污水处理厂,2014年最好的是青川县污水处理厂,2015年是剑阁县城污水处理厂。（2） 2013年的8项指标均达到排放标准,2013～2015年的pH、COD、TSS、BOD、总磷5项指标均达到排放标准。COD处理效率在2013～2015年分别为84. 56%、91. 33%、84. 38%;氨氮的处理效率在分别为82. 31%、80. 70%、77. 40%。（3）不同的工艺对处理效率有影响,改良型A₂/O工艺对于COD处理效率比其他工艺更好,而曝气生物滤池（BAF）工艺处理COD和氨氮相比于其他工艺更优。根据各地区的实际情况,建议强化居民安全用水意识,相关单位保证污水处理厂的达标排放。更多还原

【Abstract】 This paper analyzed the monitoring data of the treatment plants( VVTP) from 2013 to 2015 in Guangyuan city,and explored the spatial and temporal characteristics of tail water quality in waste water treatment plants. The results showed that( 1)The concentration of pH and TP of the sewage treatment plants were stable,and can meet the national standards,tail water is mostly weakly alkaline. In 2013,the tailwater discharge of the Dayi sewage treatment plant in the urban area was better than that of other sewage treatment plants,in 2014 and 2015,Qingchuan and Jiange sewage treatment plant was the best,respectively.( 2) The eight indicators in 2013 all met the emission standards,and the five indicators of pH,COD,TSS,BOD and total phosphorus in 2013-2015 all met the emission standards. COD treatment efficiency was 84. 56% in 2013,91. 33% in 2014 and 84. 38% in 2015. The ammonia nitrogen treatment efficiency was 82. 31% in 2013,80. 70% in 2014,and 77. 40% in 2015.( 3) Different processes have influence on the treatment efficiency. The modified A~2/O process has better COD treatment efficiency than other processes,while the biological aerated filter( BAF) process has better COD and ammonia nitrogen treatment efficiency than other processes. According to local actual situation,it is suggested to strengthen the residents’ awareness of safe water use,and ensure the sewage treatment plant emissions standards.更多还原