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上海市白龙港污水处理厂采用化学一级强化处理工艺(CEPT),污泥产量大且稳定性差,直接脱水填埋很难满足有关环保要求,因此对其进行稳定化和减量化研究是污泥处理、处置工作的重中之重。为此,开展了臭氧氧化/厌氧消化工艺处理该类污泥的中试研究。结果表明,当臭氧投量为0.08kg/kgDS、臭氧氧化污泥量占进泥量的比例为67%、污泥投配率为5%时,臭氧氧化对厌氧消化的促进作用比较明显,对有机物的降解率较单纯厌氧消化的高约6.3%,产气量增加了近20.1%。此外,投加臭氧还能改善污泥的脱水性能,并减少了脱水时助凝剂的投量。 相似文献
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污水处理厂协同处理餐厨垃圾是行业内研究热点,但目前对不同协同处理方式的比较较少.通过污水处理模型模拟的方法,研究餐厨垃圾投加至污水进水和投加至污泥厌氧消化池2种策略下对厌氧消化产能、污泥产量、污水处理和能量平衡的影响.研究结果表明,污水处理厂宜通过厌氧消化池协同处理餐厨垃圾,从而可获得更高的能量回收率. 相似文献
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白龙港污水处理厂污泥厌氧消化系统的运行分析 总被引:1,自引:0,他引:1
对目前国内规模最大的上海市白龙港污水处理厂污泥厌氧消化系统的运行情况进行了系统分析。该污泥厌氧消化系统的设计规模为204 tDS/d,于2011年5月完成启动调试,稳定运行后的产气量受进泥流量和性质的影响呈现较为规律的季节性变化,单位污泥实际年均产气量为10.73 m3/m3污泥,沼气产率为0.82 m3/kgVSS。厌氧消化系统运行中存在的较为突出的问题包括浮渣泡沫、鸟粪石结晶、池内积砂等,分析了其产生原因,并给出了相应的解决措施。 相似文献
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通过对我国北方地区108座大型污水处理厂污泥处理工艺的调研,总结了污泥厌氧消化工艺在我国北方大型污水处理厂的应用现状.结果显示,在108座污水处理厂中,共有27座采用厌氧消化工艺,其中具有代表性的9座污水厂中仅有3座正常运行.针对采用污泥厌氧消化工艺的污水处理厂,分别从工艺类型、污泥泥质、消化池池型、污泥搅拌系统、沼气利用以及系统运行管理等方面对污泥厌氧消化系统的运行状况进行了对比分析,探讨了污泥厌氧消化工艺在我国北方大型城市污水处理厂应用中存在的主要问题,并指出了解决方向. 相似文献
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城市污水处理厂剩余污泥厌氧消化试验研究 总被引:10,自引:4,他引:10
以北京市某污水处理厂的剩余污泥为研究对象,对该污泥的理论产气量进行了估算,考察了投加接种污泥和未投加接种污泥条件下污泥厌氧消化的产气情况,并分析了污泥消化前、后的泥质特点。结果表明:与未接种条件相比,污泥厌氧消化前采用投加接种污泥的方式可大大促进消化反应的进行,加快污泥的产气速率,使厌氧消化周期缩短近1/4,但对污泥的总产气量影响较小;在厌氧消化正常运行条件下,污泥产气量达到总产气量的90%时所需反应时间约为16d,可将其作为污泥厌氧消化工艺较为理想的消化周期;剩余污泥的消化性能差、产气率低、试验产气量占理论产气量的比例〈50%,在工程上单独的剩余污泥不宜采用厌氧消化工艺处理。 相似文献
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Characteristics of sludge developed under different loading conditions during UASB reactor start-up and granulation 总被引:8,自引:0,他引:8
Sludge characteristics available inside the reactor are of vital importance to maximize advantages of UASB reactor. The organic loading rate and sludge loading rate applied during start-up are among the important parameters to govern the sludge characteristics. Effects of these loading rates on the characteristics of the sludge developed are evaluated in six laboratory scale UASB reactors. The sludge characteristics considered are VSS/SS ratio of the sludge, sludge volume index, specific gravity, settling velocity and metal contents of the sludge developed under different loading rates. The experimental results indicate that, for developing good characteristics sludge, during primary start-up from flocculent inoculum sludge, organic loading rate and sludge loading rate should be in the range of 2.0-4.5 kg COD/m3 d and 0.1-0.25 kg COD/kg VSS d, respectively (chemical oxygen demand, COD). Proper sludge granulation and higher COD removal efficiency will be achieved by these loading rates. 相似文献
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Modelling the start-up of a full-scale biological phosphorous and nitrogen removing WWTP 总被引:5,自引:0,他引:5
In this paper we simulated the start-up of a full-scale biological phosphorus and nitrogen removing (BPNR) wastewater treatment plant (wwtp). For the simulation we used a metabolic phosphorus model integrated in ASM2d, referred to as the Technical University Delft Phosphorus (TUDP) model. In a previous study it was shown that under steady state conditions the model is determined by stoichiometry rather than kinetics. To evaluate the kinetics of the metabolic biological phosphorus model, we recorded and simulated the start-up of a full-scale upgraded BPNR process. The initial state of the start-up was the simulated steady state of the process prior to the start-up. We could evaluate the SRT during the start-up on the basis of the accumulation of total-phosphorus in the sludge. During the start-up, the process changed from partly nitrifying to fully nitrifying, denitrifying and phosphate removing. Growth of PAO only showed sensitive for the glycogen formation rate kGLY. Disregarding a 20% in- or decrease of the kinetic rates of biological phosphorus removal (BPR), all start-up simulations converged to comparable steady states. This underlines that BPR is determined by stoichiometry rather than kinetics. Previous simulation studies with the TUDP-model showed that glycogen accumulated to unrealistic high concentrations with an increasing sludge retention time (SRT). We modelled the glycogen kinetics with a maximum glycogen fraction, which proved an effective and straightforward method to avoid unrealistic glycogen accumulation. In the steady state simulations, the glycogen concentration was determined by the value of the maximum glycogen fraction (fGLY(max)), whereas the overall sludge composition showed insensitive towards this parameter. Temperature appeared highly sensitive and therefore should not be neglected when modelling BPR. 相似文献
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针对传统UASB反应器在启动时颗粒污泥形成缓慢的问题,采用内循环UASB反应器作为厌氧单元对酒精废水进行处理。其以低负荷启动,启动完成后容积负荷为7.9 kg/(m3.d),对COD的去除率可达80%,整个试验阶段对NH3-N的平均去除率为16.38%。扫描电镜显示颗粒污泥中的优势菌开始为短杆菌,随着培养时间的延长则出现了球菌;而现有UASB反应器中颗粒污泥的优势菌为丝状菌。对沼气成分进行分析,CH4含量最高为81.61%,N2含量则随着颗粒污泥培养时间的延长由3.68%增加至18.59%。 相似文献
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对污泥浓缩消化一体化(ISTD)中试反应器处理城市污泥的启动进行研究。试验进泥为二沉剩余污泥,含水率为98.1%~99.3%、pH值为6.75~7.2、挥发性脂肪酸(VFA)为30~144 mgHAc/L、碱度为172~277 mg/L(以CaCO3计,下同)、VS/TS值为0.355~0.434。启动试验采用逐步培养法、以投配率为10%的方式进行,污泥经加热后进入反应器。在中温条件下,经过约55 d的运行,ISTD反应器内各项指标趋于稳定,内反应室的VFA平均值为250 mgHAc/L,启动期间未出现酸化现象。稳定后,产气量为280~300 L/d、排泥含水率为92.0%~93.5%、VS/TS值为0.320~0.340、碱度为1 200~1 300 mg/L。 相似文献
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详细介绍了武汉市三金潭污水处理厂卵形消化池的启动过程,针对我国南方城市污水处理厂污泥的特点,进行了调试期能耗计算及初期投泥量的控制计算,指出调试启动过程需制定严谨的工作计划并合理使用资源才能达到节能降耗的目的。 相似文献
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