三峡库区污水处理厂污泥处置现状研究

目前,重庆三峡库区共建有污水处理厂18座,日产污泥132.95 t/d。污泥处理主要采用浓缩 机械脱水的工艺,然后送至垃圾填埋场填埋。运行过程中,由于脱水污泥含水率较高(80%左右),且未经稳定化处理,已经极大的影响了填埋场的正常运行。针对这种情况,本文提出:在有垃圾填埋场的情况下,通过机械脱水、石灰稳定化等处理后进行填埋,不具备卫生填埋条件的实行堆肥后资源化利用。

Existing Situation on Disposal of Sludge from Wastewater Treatment Plant in Three-Gorges Reservoir Area

At present 18 wastewater treatment plants operateing in the Small towns of Three Gorge Areas of Chongqing Municipality,producing 132.95 tons surplus sludge everyday.As regards to the disposition of such numerous surplus sludge,the major disposition technique in these wastewater water treatment plants, i.e.,thickening and mechanical dewatering technique followed by feeding into the municipal solid waste landfill,seems to have a rather bad effect on the normal operation of the municipal solid waste landfill,due to the unstabilized sludge resulted from this technique of the sludge disposition and high moisture in the sludge,which is higher than 80%.This paper has paid some attention to this phenomenon.With respect to the small towns having the the municipal solid waste landfill,the techniques of mechanical dewatering,calcareousness stabilized etc.before feeding into the municipal solid waste landfill,seem to be feasible,while the composting and comprehensive utilization of sludge is available in the small towns which have no municipal solid waste landfills.