炭泥系统循环吸附降解有机物藻类试验研究

发布时间：2018-04-28 02:23

  本文选题：炭泥 + 循环吸附　； 参考：《山东建筑大学》2017年硕士论文

【摘要】：近年来,随着地表水源水受周边环境污染影响的加剧,季节性枯水期使得微污染物质变得更加复杂,水体富营养化越来越严重,传统的水处理工艺很难保证水厂出水水质要求。高密市孚日自来水厂的原水有机物藻类含量近年来不断增加,亟需升级水厂现有工艺以保证出水水质。研究提出一种新型微污染水源水预处理技术——炭泥系统循环吸附降解技术(Carbon-Sludge system Circle Adsorption Bio-degradation technology),简称CSCAB技术。本文主要研究了CSCAB技术对水厂原水的预处理效果。试验研究了系统中生化池的启动、调试与运行,考察了系统对原水CODcr、UV254、氨氮、各藻类指标的去除效果,总结了温度、有机物浓度、pH、停留时间、生物活化炭泥浓度等因素对系统处理效果的影响。炭泥系统主要由生物再生池、吸附池、混凝沉淀池和回流系统构成,利用生物活化炭泥的吸附降解特性、生物泥絮凝剂助凝作用强化混凝效果,去除水中有机物、藻类等物质。生物再生池正常运行后,对CODcr、氨氮与UV254的去除率分别达到53.09%、33.74%、28.66%;对绿藻、蓝藻、硅藻、隐藻的去除率分别达到32.19%、51.89%、50.94%、38.89%。生物活化炭泥的最佳投加体积比为3%。生物活化炭泥分别进入吸附池进行吸附降解、混凝沉淀池炭泥强化混凝,对原水CODcr、UV254、氨氮、藻类细胞总数及浊度的去除率分别为53.99%、44.05%、58.63%、40.14%、56.11%;处理后水中的CODcr、UV254、氨氮、藻类细胞总数及浊度分别为6.83mg/L、0.10 cm-1、0.13mg/L、10331cell/ml、1.58NTU。影响炭泥系统处理效果的因素有温度、有机物浓度、pH、停留时间、生物活化炭泥浓度等。水温变化对系统的处理效果影响较大,温度越高对有机物藻类各指标的去除率越大,温度达到28.4℃时CODcr、氨氮、UV254的去除率达到最大值。冬季采用回流系统适当加温的方式,提高系统冬季处理效果,且能耗较低。原水有机物浓度升高后,生物活化炭泥的吸附降解率也随之升高,且当CODcr浓度为25.74mg/L时,CODcr和藻类的去除率达到67.4%、49.4%。pH对系统的影响较大,酸性较大时(6.5)系统出水的CODcr、藻类浓度较高,pH在6.5~8.0时,出水CODcr与藻类细胞总数含量较低;当pH上升到8.5时,出水CODcr浓度升高,而藻类细胞总数降低。通过对生物再生池不同停留时间的处理效果试验研究表明,生物再生池最佳的停留时间为10h。生物活化炭泥浓度随着系统的运行不断升高,试验研究表明炭泥浓度在3500~4500mg/L处理效果较好,炭泥浓度过高时可通过适当炭泥外排、调节回流系统等方式降低炭泥浓度,使系统达到最佳的处理效果。
[Abstract]:In recent years, as the surface water source water is affected by the surrounding environmental pollution, the seasonal dry season makes the micro-polluted material more complex, and the eutrophication of the water body becomes more and more serious. The traditional water treatment process is very difficult to ensure the water plant effluent quality requirements. The content of organic matter algae in raw water of Fulge Waterworks in Gaomi City has been increasing in recent years. It is urgent to upgrade the existing process of water plant in order to ensure the quality of effluent. In this paper, a new micro-polluted source water pretreatment technique, Carbon-Sludge system Circle Adsorption Bio-degradation technology, is proposed. In this paper, the pretreatment effect of CSCAB technology on raw water in water plant was studied. The start-up, commissioning and operation of the biochemical tank in the system were studied. The removal effects of the system on the CODcr-UV254, ammonia nitrogen and algae indexes in raw water were investigated, and the temperature, organic concentration pH and residence time were summarized. The influence of the concentration of activated carbon sludge on the treatment effect of the system. Carbon sludge system is mainly composed of biological regeneration tank, adsorption tank, coagulation sedimentation tank and reflux system. Biological sludge flocculant helps to enhance coagulation effect and remove organic matter, algae and other substances in water by utilizing the adsorption and degradation characteristics of biological activated carbon sludge. After normal operation, the removal rates of COD, NH3-N and UV254 were 53.09 and 33.74and 28.66respectively, and the removal rates of chlorophyta, cyanobacteria, diatoms and cryptophaga were 32.191.89and 50.94and 38.89respectively. The optimum volume ratio of activated carbon sludge is 3. The activated carbon sludge entered the adsorption tank for adsorption and degradation, and the activated carbon sludge enhanced the coagulation in the sedimentation tank. The removal rates of CODcrr UV254, ammonia nitrogen, total algal cell count and turbidity were 53.9999, 44.05 and 58.63 and 56.11, respectively; the CODcrcrn UV254, ammonia nitrogen, ammonia nitrogen, The total number and turbidity of algal cells were 6.83 mg / L 0.10 cm ~ (-1) and 0.13 mg 路L ~ (-1) mg 路ml ~ (-1) 路ml ~ (-1) NTU, respectively. The factors affecting the treatment effect of carbon sludge system are temperature, pH of organic matter, residence time, concentration of activated carbon sludge and so on. The change of water temperature has great influence on the treatment effect of the system. The higher the temperature is, the greater the removal rate of organic algae is. When the temperature reaches 28.4 鈩，

本文编号：1813362