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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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本文论证了在城市生活污水处理厂中,利用各种污水处理池面所能收集的太阳能热量,采用两相法污泥厌氧消化技术,对污水处理过程中产生的污泥进行消化处理的可能性。 相似文献
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污泥厌氧消化/热电联产是一项重要节能工艺技术,对于提高资源和能源利用效率意义重大。完善的管理是保证污泥消化及热电联产系统稳定高效运行的关键环节。麦岛污水处理厂将Multiflo~?Trio初沉污泥与生物滤池剩余污泥进行混合,形成沼气产率较高的混合污泥,并进行中温厌氧消化,所产沼气进入热电联产系统用于发电及沼气锅炉,回收余热作为污泥消化及厂区采暖热源。10余年来,麦岛污水处理厂的污泥消化及热电联产系统实现了安全、稳定、高效的运行,保证了污泥的资源化、减量化、无害化处理及利用。介绍了青岛麦岛污水处理厂污泥厌氧消化及热电联产的运行情况,探讨如何在污泥消化及热电联产间做好运行管理和调控,使之形成良性循环。 相似文献
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污泥消化池设计中几个问题的探讨 总被引:2,自引:0,他引:2
我国污泥消化处理尚未普及,有关研究、实践的经验也不多。通过对天津东郊污水处理厂污泥消化池的工艺设计,探讨了污泥投配、污泥加热、沼气搅拌等设计中的几个关键问题。 相似文献
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介绍了青岛海泊河污水处理厂污泥消化过程中产生沼气的成分以及此沼气在生活炉灶应用的情况 相似文献
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以厌氧产氢反应器出水为底物,在序批式反应器中研究了好氧颗粒污泥的培养过程。结果表明,以厌氧产氢反应器出水为底物,在60d内能够培养出粒径大、沉降性能优异且对污染物去除能力强的好氧颗粒污泥。在活性污泥的颗粒化过程中,伴随着污泥体积指数的减小。污泥的粒径和沉速增大,反应器内的污泥浓度增加,从而提高了反应器的处理效能。 相似文献
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为考察啤酒厂污水处理站的脱水污泥(简称啤酒污泥)用作城市污水厂接种污泥的可行性,摸索污泥的培养与驯化规律,采用连续操作、全流量同步培养和驯化方法,在处理能力为500m^2/d的UNITANK池中对啤酒污泥进行了培养和驯化。试验结果表明,啤酒污泥完全可以作为城市污水处理厂的接种污泥使用,而且培养时间短,出水水质好。曝气0.5h、厌氧搅拌1h时,活性污泥增长最快。将DO控制在2mg/L左右有利于活性污泥的增长;当DO长时间在7mg/L以上时,污泥浓度下降趋势明显。污泥浓度达到2000mg/L所需的培养驯化时间仅为5d;使出水水质达到一级B标准所需的培养时间约为6d。这种培养、驯化方法和经验可为其他城市污水处理厂的建设和运行提供参考。 相似文献
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合成与实际污水中聚磷菌厌氧代谢研究 总被引:1,自引:0,他引:1
以实际生活污水为进水,在实验室对连续流A/O除磷系统进行了聚磷菌的驯化与培养,当系统对磷的去除率稳定在95%以上时利用烧杯批式试验考察了合成污水与实际污水中聚磷菌的厌氧代谢过程,并基于生物除磷的Mumleitner代谢模型,根据试验数据推求了表征聚磷菌厌氧代谢特性的化学计量参数及反应速率。结果表明,合成污水与实际污水中聚磷菌厌氧代谢过程生成的聚β羟基链烷酸的成分及反应速率存在显著差异,研究结果对采用活性污泥数学模型准确模拟实际污水中的生物除磷过程具有一定的参考价值。 相似文献
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To investigate the mechanism of sludge reduction in the anaerobic side-stream reactor (SSR) process, activated sludge with five different sludge reduction schemes were studied side-by-side in the laboratory. These are activated sludge with: 1) aerobic SSR, 2) anaerobic SSR, 3) aerobic digester, 4) anaerobic digester, and 5) no sludge wastage. The system with anaerobic SSR (system #2) was the focus of this study and four other systems served as control processes with different functions and purposes. Both mathematical and experimental approaches were made to determine solids retention time (SRT) and sludge yield for the anaerobic SSR process. The results showed that the anaerobic SSR process produced the lowest solids generation, indicating that sludge organic fractions degraded in this system are larger than other systems that possess only aerobic or anaerobic mode. Among three systems that involved long SRT (system #1, #2, and #5), it was only system #2 that showed stable sludge settling and effluent quality, indicating that efficient sludge reduction in this process occurred along with continuous generation of normal sludge flocs. This observation was further supported by batch anaerobic and aerobic digestion data. Batch digestion on sludges collected after 109 days of operation clearly demonstrated that both anaerobically and aerobically digestible materials were removed in activated sludge with anaerobic SSR. In contrast, sludge reduction in the aerobic SSR process or no wastage system was achieved by removal of mainly aerobically digestible materials. All these results led us to conclude that repeating sludge under both feast/fasting and anaerobic/aerobic conditions (i.e., activated sludge with anaerobic SSR) is necessary to achieve the highest biological solids reduction with normal wastewater treatment performance. 相似文献
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Anaerobic/oxic/anoxic granular sludge process as an effective nutrient removal process utilizing denitrifying polyphosphate-accumulating organisms 总被引:17,自引:0,他引:17
In a biological nutrient removal (BNR) process, the utilization of denitrifying polyphosphate-accumulating organisms (DNPAOs) has many advantages such as effective use of organic carbon substrates and low sludge production. As a suitable process for the utilization of DNPAOs in BNR, an anaerobic/oxic/anoxic granular sludge (AOAGS) process was proposed in this study. In spite of performing aeration for nitrifying bacteria, the AOAGS process can create anaerobic/anoxic conditions suitable for the cultivation of DNPAOs because anoxic zones exist inside the granular sludge in the oxic phase. Thus, DNPAOs can coexist with nitrifying bacteria in a single reactor. In addition, the usability of DNPAOs in the reactor can be improved by adding the anoxic phase after the oxic phase. These characteristics enable the AOAGS process to attain effective removal of both nitrogen and phosphorus. When acetate-based synthetic wastewater (COD: 600 mg/L, NH4-N: 60 mg/L, PO(4)-P: 10 mg/L) was supplied to a laboratory-scale sequencing batch reactor under the operation of anaerobic/oxic/anoxic cycles, granular sludge with a diameter of 500 microm was successfully formed within 1 month. Although the removal of both nitrogen and phosphorus was almost complete at the end of the oxic phase, a short anoxic period subsequent to the oxic phase was necessary for further removal of nitrogen and phosphorus. As a result, effluent concentrations of NH(4)-N, NO(x)-N and PO(4)-P were always lower than 1 mg/L. It was found that penetration depth of oxygen inside the granular sludge was approximately 100 microm by microsensor measurements. In addition, from the microbiological analysis by fluorescence in situ hybridization, existence depth of polyphosphate-accumulating organisms was further than the maximum oxygen penetration depth. The water quality data, oxygen profiles and microbial community structure demonstrated that DNPAOs inside the granular sludge may be responsible for denitrification in the oxic phase, which enables effective nutrient removal in the AOAGS process. 相似文献
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《Water research》1987,21(7):789-799
Methanogenic bacteria of 108 g SS−1 in the activated sludges from an aeration tank treating sewage and from a secondary sedimentation tank of an activated sludge plant treating textile dyeing wastewater were enumerated by the Most Probable Number (MPN) technique. By using the two activated sludges as the seed material, anaerobic granular sludges were obtained at 35°C in two lab-UASB reactors having volumes of 29 and 481, and treating a glucose molasses solution of 1000–3500 mg COD 1−1 and citrate wastewater of 20,000–36,000 mg COD 1−1 respectively. The characteristics of granulation using the activated sludge as the seed were similar to those using digested sewage sludge as the seed. It is shown that activated sludge is readily available seed material for an anaerobic reactor. The growth of methanogenic bacteria in the activated sludge can be attributed to the existence of some anaerobic nuclei in the activated sludge flocs. The factors for the cultivation of granular sludge by using the activated sludge are also discussed. 相似文献