共查询到16条相似文献,搜索用时 109 毫秒
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UASB反应器处理啤酒废水的颗粒污泥培养研究 总被引:1,自引:0,他引:1
颗粒污泥是UASB反应器高效稳定运行的最基本的保障,因此污泥颗粒化技术一直是UASB技术的关键之一。以啤酒废水为基质,重点研究了在生产性UASB反应器内培养颗粒污泥的工艺控制条件。 相似文献
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采用小试规模的EGSB反应器,接种厌氧絮状污泥,培养出SRB颗粒污泥并研究了SRB颗粒污泥形成的工艺条件与影响因素。研究表明,进水SO4^2-负荷、碳氮磷源、COD与SO4^2-质量浓度比、反应器的启动方式、水力负荷、微量元素、H2S、pH、温度等是影响SRB污泥颗粒化的主要工艺条件。 相似文献
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采用序批式颗粒污泥床反应器(SBBGR)培养、驯化好氧颗粒污泥,并应用于处理再生纤维造纸废水二级出水,探讨废水中污染物的去除效果,分析反应器中微生物种群的变化。结果表明,在进水(二级出水) CODCr和BOD5分别为(190±33.4) mg/L和(7.2±1.7) mg/L条件下,出水CODCr可降至(95±22) mg/L,去除率为(47.7±5.0)%;红外光谱和气相色谱-质谱联用仪分析表明,SBBGR反应器对芳香族化合物为代表的特征污染物具有良好的降解去除效果;微生物群落分析表明,经过驯化后具有降解废水中芳香族化合物能力的微生物在污泥中的相对丰度提高,SBBGR反应器有降解木质素的能力。 相似文献
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草浆中段废水厌氧污泥的培养 总被引:2,自引:0,他引:2
分析了UASB反应器中颗粒污泥的性质,通过UASB反应器处理经过浓硫酸沉淀过的草浆中段废水培养颗粒污泥的试验,进一步说明了颗粒污泥的形成过程,并讨论了形成的影响因素. 相似文献
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高效上流式厌氧污泥床(UASB)反应器能否成功运行的关键在于颗粒污泥的培养。作者对在(UASB)反应器中颗粒污泥的培养技术、营养条件和环境因素进行了较为详细的研究,并从物理学和生物学的角度对颗粒污泥的特性进行了分析和探讨,最后进行了颗粒污泥(UASB)反应器运行性能的研究。研究结果表明,实验室可在65天的时间内培养得到具有良好沉降性能和高活性的颗粒污泥,这种颗粒污泥其内部结构极为合理;装有颗粒污泥的UASB反应器是一种非常高效稳定的废水厌氧处理装置。 相似文献
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分析了厌氧膨胀颗粒污泥床(EGSB)反应器处理竹浆制浆废水有机物的降解过程和启动规律,并对启动过程中厌氧颗粒污泥的基础性质、形态特征和微生物相进行了探讨和表征。结果表明,在废水水质逐渐变化和废水浓度逐渐提升的过程中,EGSB反应器对竹浆制浆废水COD有良好的去除效果,启动完成后期,CODCr去除率保持在68.5%以上,出水p H值为7.8~8.0,稍高于进水,反应器容积负荷为13.50 kg CODCr/(m~3·d),且处理后竹浆制浆废水获得了更佳的可生物降解性,其BOD/COD值较原水提高了46.9%;较接种污泥,启动后期颗粒污泥总量呈减少趋势,且沿反应器高度自下而上逐渐减少,而VS/TS值,中部污泥82.4%,顶部污泥73.5%,底部污泥56.7%,接种污泥44.6%,颗粒污泥活性较大程度改善;同时,启动后期颗粒污泥Ca含量的大幅度减少,Mg、Fe、Zn等含量的增加,也对改善反应器内污泥外观、尺寸、沉降性、强度及微生物群落的构建起到一定作用。 相似文献
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氯酚菌的筛选及其对氯酚的降解 总被引:2,自引:0,他引:2
通过驯化筛选分离出7株高效降解氯酚的菌株,采用冷冻法通过3种不同组合方式(①氯酚优势好氧菌和厌氧颗粒污泥的混合固定;②中氯酚优势好氧菌单独固定后再与厌氧颗粒污泥混合;③氯酚优势好氧菌直接投加到厌氧颗粒污泥中)在微好氧及厌氧条件下进行了研究.结果表明,在微好氧条件下,氯酚优势好氧菌和厌氧颗粒污泥的混合固定可以实现氯酚厌氧好氧同时降解;而在厌氧过程中,3种组合方式的氯酚降解速率则没有明显差别.厌氧好氧的活性实验也进一步证实了固定化颗粒中厌氧、好氧菌活性的存在. 相似文献
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分别以活性污泥和厌氧颗粒污泥培养的好氧颗粒污泥为对象,对成熟污泥颗粒的脱氮性能进行了比较研究。结果表明,颗粒污泥驯化成熟之后,对氨氮的去除效果维持在95%左右,与其污泥接种源没有明显的相关关系;对一个降解周期内氮的形态分析表明,在颗粒污泥存在的反应器内发生了同步硝化反硝化。 相似文献
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Formation and characterization of aerobic granules in a sequencing batch reactor treating soybean-processing wastewater 总被引:7,自引:0,他引:7
Aerobic granules were cultivated in a sequencing batch reactor (SBR) fed with soybean-processing wastewater at 25+/-1 degrees C and pH 7.0+/-0.1. The granulation process was described via measuring the increase of sludge size. The formation of granules was found to be a four-phase process, that is, acclimating, shaping, developing, and maturated. A modified Logistic model could well fit with the granule growth by diameter and could be employed to estimate the maximum diameter, lag time, and specific diameter growth rate effectively. Both normal and log-normal distributions proved to be applicable to model the diameter distribution of the granules. The granule-containing liquor was shear thinning, and their rheological characteristics could be described by using the Herschel-Buckley equation. The suspended solids concentration, pH, temperature, diameter, settling velocity, specific gravity, and sludge volume index all had an effect on the apparent viscosity of the mixed liquor of granules. The matured granules had fractal nature with a fractal dimension of 1.87+/-0.34. Moreover, 83% of matured granules were permeable with fluid collection efficiencies over 0.034. As compared to activated sludge flocs, the aerobic granules grown on the soybean-processing wastewater had better settling ability, mass transfer efficiency, and bioactivity. 相似文献
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Multi-scale individual-based model of microbial and bioconversion dynamics in aerobic granular sludge 总被引:2,自引:0,他引:2
Xavier JB De Kreuk MK Picioreanu C Van Loosdrecht MC 《Environmental science & technology》2007,41(18):6410-6417
Aerobic granular sludge is a novel compact biological wastewater treatment technology for integrated removal of COD (chemical oxygen demand), nitrogen, and phosphate charges. We present here a multiscale model of aerobic granular sludge sequencing batch reactors (GSBR) describing the complex dynamics of populations and nutrient removal. The macro scale describes bulk concentrations and effluent composition in six solutes (oxygen, acetate, ammonium, nitrite, nitrate, and phosphate). A finer scale, the scale of one granule (1.1 mm of diameter), describes the two-dimensional spatial arrangement of four bacterial groups--heterotrophs, ammonium oxidizers, nitrite oxidizers, and phosphate accumulating organisms (PAO)--using individual based modeling (IbM) with species-specific kinetic models. The model for PAO includes three internal storage compounds: polyhydroxyalkanoates (PHA), poly phosphate, and glycogen. Simulations of long-term reactor operation show how the microbial population and activity depends on the operating conditions. Short-term dynamics of solute bulk concentrations are also generated with results comparable to experimental data from lab scale reactors. Our results suggest that N-removal in GSBR occurs mostly via alternating nitrification/denitrification rather than simultaneous nitrification/denitrification, supporting an alternative strategy to improve N-removal in this promising wastewater treatment process. 相似文献
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