The invention discloses a sludge dewatering additive, which comprises the following raw materials of weight ratio: magnesium chloride 20-70, modified dolomite 30-80 and calcium chloride 0-5. The weight ratio of the raw material is also added to heavy calcium carbonate 8-10. Since the invention of sludge dewatering additive destroys the cells in sludge water, so a large amount of water contained in the sludge cell water be dissipated after the sludge is then placed in the filter after the natural environment, which can continuously evaporate moisture, natural drying after 36 hours, the water content of the sludge can be reduced to about 10%; sludge reuse provides an excellent foundation. At the same time, the invention of sludge dewatering additive can make heavy metal in sludge was solidified in the sludge, will not be absorbed by plant roots, and will not be spread in soil and water, so the invention is used for sludge dewatering additive of dewatered sludge does not have two pollution, dewatered sludge can be used as fertilizer raw materials, fuel or building material raw materials, does not have two pollution.
【技术实现步骤摘要】
本专利技术涉及污泥处理,是一种污泥脱水添加剂。
技术介绍
对生活用水和工业废水处理后产生的污泥中含有机残片、细菌菌体、无机颗粒、胶 体等极其复杂的非均质体,由于污泥的含水量高达85%,所以极易腐化变臭,其运输存放等 均严重污染环境。由于污泥的脱水是一项极难实现的技术,所以世界各国对污泥的处理最 初均采用填埋法,但是随着技术进步后发现,对污泥填埋没有最终消除污染,并对水资源及 农作物产生严重危害。当进入80年代后,才对污泥的处理有了较大的改进。目前,比较好 的几种污泥处理方法是①将污泥油炸,使水份脱除后,将固体物做燃料的原料使用;这种 方法的不足是投资一条污泥处理生产线,需要8000多万元人民币,并且运行成本极高,以 工艺中设备10年寿命计,每处理一吨污泥需要50万元人民币,运行成本约为180元左右; ②许多国家用发电石发电尾气将污泥烘干,将固体物做燃料的原料,这种方法的不足是投 资大,运行成本高,每处理一吨污泥需要10-12万元人民币,运行成本约为200元左右;③将 污泥发酵后做成肥料,它的不足在于污泥中的汞、锌等重金属易通过植物根系被吸收,使 粮食和蔬菜的重 ...
【技术保护点】
1.一种污泥脱水添加剂,其特征在于:包括下述重量比的原料:氯化镁20-70、改性白云石30-80、氯化钙0-5。
【技术特征摘要】
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