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岛城:污水处理成清流

2017-08-24 08:47:40   中国青年网

李村河污水处理厂的工作人员演示污水由污变清的过程。

□ 本报记者 张晓帆 宋弢

本报实习生 党悦

8月17日,针对岛城市民关注的污水处理问题,青岛市开展“青岛污水处理厂升级改造建设进展”大家看活动,市人大代表、环保社会监督员、环保热心人士等走进李村河污水处理厂、麦岛污水处理厂,探访近年来城区内改扩建规模大、效果显著的污水处理厂。

生态环保的“清洁工”

在李村河污水处理厂生物处理池里,有不少黑色小圆柱在随水波翻滚。工作人员介绍,那些都是“移动生物床”,微生物附着在上面,污水要在这里反应19个小时,然后进入下一个环节。

大量生活污水从排污管道流进污水处理厂,经过层层过滤和沉淀,并经过生物池内微生物除磷除氮,经过最后一步处理的污水已经重新变得清澈透明。污水处理要经过格栅过滤、多次沉淀、生物处理等一系列操作。

李村河污水处理厂是全市最大的污水处理厂,目前承担着市北、李沧、崂山三区城市污水处理任务。

李村河污水处理厂负责人告诉记者,该厂目前服务面积124平方公里,服务市民约80万人,每天可生产超过20万吨的中水,其中有5万吨用于园林绿化灌溉和城市景观河道的补充水源。

“进入夏季以来,岛城居民生活用水量猛增。李村河污水处理厂设计处理能力是每天25万吨,但今年5月份以来,日进厂污水量达27万吨,最近岛城降雨量较大,最大污水处理量超过每天31万吨,超过设计能力24%。”工作人员介绍,支撑这一强大污水处理能力的关键,是去年投入运营的李村河污水处理厂三期日处理能力8万吨改扩建工程。

经过此次改扩建,李村河污水处理厂改良更新了工艺技术,处理工艺稳定运行,出水水质全部达到现行国家城市生活污水最高排放一级A标准,极大缓解了整个市区的城市污水处理压力。

废水产沼气用来发电

“麦岛污水处理厂在2008年奥帆赛期间发挥了巨大处理能力,整个比赛期间没有超标污水流入青岛前海,海域水质持续达标。”工作人员介绍,麦岛污水处理厂于2007年7月建成投产,日处理规模达14万立方米。

麦岛污水处理厂的污水处理设备运转现场,污浊的生活污水从排污管道流进污水处理厂,经过层层过滤和沉淀,并经生物池内微生物除磷、除氮,最后流出的水,已经重新变得清澈透明。

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