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航埠:治水重现生态水塘
2017-08-04 07:40:28 中国青年网
航埠:治水重现生态水塘
杭 炜
来到柯城区航埠镇翁家村的砂锅塘边,一大片人工生态浮岛、几十根正在喷水的曝气装置映入眼帘。来往的翁家村村民相告,在铺设这些“新鲜玩意”之前,河水黑臭,夏季越发让人不敢靠近。而如今,到塘边散步成为村民饭后休闲的一个选择。“小时候可以游泳的水塘又回来了”,村民纷纷为剿劣治水点赞。
作为翁家村的“母亲河”,内河曾是不少村民童年时游泳嬉戏的场所。然而,由于生产生活污水直排情况的加剧,内河水质每况愈下,居民对此意见很大,整治呼声不断。“剿劣治水”行动开展以来,航埠镇对内河流域进行科学整治,生态浮岛、曝气装置、科学引流……一连串组合动作,奏响了该镇全民治水的“协奏曲”。
所谓人工生态浮岛,就是将陆生喜水植物移植到浮床上栽培,可以达到吸收氮、磷等元素,抑制藻类生长的目的,从而达到净化水质的效果。据负责生物浮岛建设的团队介绍,翁家村各个水塘河流共种植了约100平方米鸢尾草和300平方米绿萝,还有荷花、红掌等一系列水生植物,铺设于流域中。经过一段时间的生物循环,水质将有效提高。而曝气装置配合生态绿岛,确保植物长势良好,实现综合治理。据专业人员介绍,曝气增氧技术最早应用在水产养殖、工业废水处理中,如今也应用在景观水治理中。通过曝气设备小孔产生的水流,提高水域的流动性和溶解氧含量,降低厌氧微生物的生存空间。设置好定时装置,每天循环开关,实现水质提升。另外,航埠镇还建立动态的科学引水机制,每周至少两次“科学引流”,确保水质稳定可控。
航埠镇还在清淤泥、堵源头上下功夫,目前已经完成3万立方米的清淤工作,未来还将清淤1万余立方米,完成200户农户生活污水的截污纳管;并对“毛细血管”小微水体查明淤积堵塞原因,逐一制定整改方案,确保水体交换功能恢复;对工业区、居民区的污水排放,制定专门管网建设规划,确保把管道铺到最后一米;利用“四个平台”建设,建立起全方位的农村网格员制度,与治水督导队一起,开展全方位治水督导,做到发现一处、上报一处、整治一处。
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