| 化粪池工艺原理 |
| 添加时间：2018/5/25 16:48:28 浏览次数： |
| 化粪池工艺原理 Process principle of septic tank 化粪池是一种利用沉淀和厌氧发酵的原理，去除生活污水中悬浮性有机物的处理设施， 属于初级的过渡性生活处理构筑物。生活污水中含有大量粪便、纸屑、病原虫...悬浮物固体浓度为 100~350mg/L，有机物浓度CODCr 在100~400mg/L之间，其中悬浮性的有机物浓度BOD5为50~200mg/L。污水进入化粪池经过12~24h的沉淀，可去除50%~60%的悬浮物。沉淀下来的污泥经过3个月以上的厌氧发酵分解，使污泥中的有机物分解成稳定的无机物，易腐败的生污泥转化为稳定的熟污泥，改变了污泥的结构，降低了污泥的含水率。定期将污泥清掏外运，填埋或用作肥料。要求：化粪池 的沉淀部分和腐化部分的计算容积，应按《建筑给水排水设计规范》(GB50015-2003)第4.8.4～4.8.7条确定。污水在化粪池中停留时间宜采用12h~36h。对于无污泥处置的污水处理系统，化粪池容积还应包括贮存污泥的容积。 The septic tank is a kind of primary transitional life processing structure, which uses the principle of precipitation and anaerobic fermentation to remove the suspended organic matter in domestic sewage. There are a lot of feces, paper scraps and pathogens in domestic sewage. The solid concentration of suspended solids is 100~350mg/L, and the concentration of organic matter is CODCr between 100~400mg/L, and the concentration of suspended organic matter is 50~200mg/L. When sewage enters septic tanks through 12~24h precipitation, the suspended solids of 50%~60% can be removed. The sludge is decomposed through anaerobic fermentation for more than 3 months. The organic matter in the sludge is decomposed into stable inorganic matter, and the corrupted raw sludge is converted to stable ripe sludge. The structure of the sludge is changed and the water content of the sludge is reduced. The sludge is regularly transported out for landfill or used as fertilizer. Requirements: the calculation volume of the precipitate part and the decadent part of the septic tank shall be determined according to section 4.8.4 to 4.8.7 of the design specification for water supply and drainage of buildings (GB50015-2003). 12h~36h should be used for the residence time of sewage in septic tanks. For sewage disposal systems without sludge disposal, the volume of septic tanks should also include the volume of storage sludge. |
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