【作者】 曲振晓；

【导师】 张智；

【作者基本信息】 重庆大学 ， 市政工程， 2008， 硕士

【摘要】 本文阐述了污泥的减量化和稳定化的发展概况,针对目前国内污泥处理处置存在的问题,如污泥脱水困难、能耗高等,并从生产性和实用性的角度出发,探索污泥竖式强化渗滤自然干化与消化一体化新工艺,并验证一体化污泥竖式强化渗滤自然干化与消化反应器的可行性并分析其效果,得出以下主要结论。①开发了污泥一体化强化渗滤浓缩自然干化与消化新工艺,验证了该反应器初步用应于城市污水厂污泥处理是可行性。②一体化污泥强化渗滤浓缩自然干化与消化反应器具有较好的浓缩效果,进泥含水率为99.2%左右,在污泥停留时间为120d条件下,排泥含水率为79%左右,浓缩效果良好且未出现滤料堵塞现象。③一体化强化渗滤自然干化消化反应器采用膜保温系统,使反应器在常温下基本达到污泥中温消化的温度要求。④污泥一体化强化渗滤浓缩自然干化与消化反应器在常温下消化效果良好。污泥中有机物含量由进泥的52%降到排泥的30%以下,有机物分解程度达到44.4%。较佳运行参数:有机负荷为0.8kgVSS/ （m3·d） ,污泥停置时间为120d,水力停留时间8.3d,污泥浓度为209.423g/L,污泥含水率为79.06%,有机物分解率达到44.4%。⑤污泥渗滤液COD值大部分在200～600mg/L之间;TN最大值为489.5 mg/L;TP最大值为117.5 mg/L;NH₃-N平均值大部分在150～250mg/L之间,污泥渗滤液必须抽回至污水厂的水处理流程中处理。⑥采用一体化强化渗滤自然干化消化反应器消化后污泥重金属检测中铜是超出污泥农用标准（城镇污水处理厂污染物排放标准GB18918-2002）的。因此污泥不宜农用,但可以作为园林用土和土壤改造。⑦得到一体化污泥强化渗滤自然干化与消化反应器基于污泥沉降试验的减量预测模型式R = [99 - 79.3959t^-0.5529]×100%。利用这一模型式进行一体化污泥强化渗滤自然干化与消化反应器减量效率进行预测。通过试验证明本反应器提高了污泥泥水分离效率,增强了污泥自然干化效果,并且经过消化实现了减量化、稳定化及资源化。本反应器集污泥浓缩、稳定、脱水过程在一个装置中完成,管理简单、投资节约。更多还原

【Abstract】 This paper described the development of the general situation of sludge reduction and stabilization. In light of the existing problems of domestic sludge treatment and disposal, such as sludge dewatering difficulties, higher energy consumption and so on, we explored from the perspective of the production and practicality, and developed a new type of reactor of integration of vertical enhanced filtration and natural drying and digestion on sewage sludge treatment. By the experiment, we vertified the feasibility of the reactor and analyzed its effect. Main conclusions are as follows:①We developed a new type reactor of integration of vertical enhanced filtration and natural drying and digestion （IVEFNDD） on sewage sludge treatment. Furthermore, we vertified the feasibility of the reactor and analyzed its effect.②The IVEFNDD reactor has a better effect on the sludge concentration. The rate of the moisture content in the sludge is 99.2%. But in the condition of 120 d, the rate of moisture content in the sludge is 79% .The effect on the sludge concentration is better and there is no plugging in the filter material.③The IVEFNDD reactor has been adopted the membrane insulation system, so under the normal temperature, the temperature of digestion in the IVEFNDD reactor has basically reached the medium temperature of sludge digestion.④Under the normal temperature, the IVEFNDD reactor has a better effect on digestion. The organic matter content in sludge which entered in the IVEFNDD reactor is from 52 percent to 30 percent, and the decomposition of organic matter level has reached 44.4%. Better operating parameters: The organic loading is 0.8 kgVSS / （m3 ? d）, the sludge staying time is 120 d, the hydraulic retention time is 8.3 d, the sludge concentration is 209.423 g / L, the moisture content of the sludge is 79.06%, the decomposition of organic matter rate has reached 44.4%.⑤Most of the COD value of the sludge leachate is from 200 to 600 mg / L; TN max is 489.5 mg / L, TP max is 117.5 mg / L; Most of the average NH3-N is from 150 to 250 mg / L . So the leachate must be returned to the wastewater treatment plant to deal with.⑥Through the heavy metal examining, we discovered that the copper in the sludge which is treated in the IVEFNDD reactor had exceeded the standard （urban sewage treatment plant pollutant discharge standards GB18918-2002）. Therefore, it is not appropriate to use the sludge on the farm, but it can be used as garden soil and soil transformation.⑦Based on the sludge settlement test, we find the prediction model of the IVEFNDD reactor: R = [ 99 - 79.3959t^-0.5529]×100%. Use the prediction model; we can prognosticate the reducing efficiency of sludge.By the experiment, we proved that the IVEFNDD reactor improved the efficiency of slurry separation and enhanced the effect of sludge natural drying, and achieved the reductions, the stability and the resource through digestion. Furthermore, sludge thickening, stability and dehydration process are completed in a device of the IVEFNDD reactor. The management is simple, and the investment is saving.更多还原