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氧化锌法处理低浓度SO_2烟气的模拟实验研究 总被引:3,自引:0,他引:3
文中介绍了氧化锌法脱硫的基本原理,总结了国内外研究及应用现状,同时详细叙述了模拟实验采用的流程、主要仪器,着重分析了不同SO2浓度下的吸收率以及亚硫酸锌的氧化率与氧化时间、浆液温度的关系,提出了实验过程中发现的问题及可采取的措施,为后期中试以及工业化应用提供了设计依据。 相似文献
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介绍了三索式格栅除污机的工艺及控制原理 ,提出了一些以低价的元器件代替高价元器件的方案 ,设计了国产化的电控系统 ,使整机完全实现国产化 ,降低了系统的成本 ,同时便于调试和维修。 相似文献
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运用计算流体力学软件FLUENT,对旋风除尘器内部流场进行了数值模拟,利用模拟结果对旋风除尘器入口不同位置气流在除尘器顶部的环形空间的轨迹进行了分析研究,探明了气流在环形空间的运动规律和基本特征,阐明了旋风除尘器顶部"尘环"形成的根本原因,指出了粉尘发生短路的原因和多发区域并在此基础上就除尘器的增效问题给出了改进方案. 相似文献
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中国排污权交易的法制建设探讨——以浙江省为例 总被引:1,自引:0,他引:1
分析了浙江省排污权交易试点工作中存在的问题,探讨了美国、欧盟等国家和地区的排污权交易法制建设对中国的启示,对国家、地方2个层面进行了排污权交易法制建设的构想。最后,对浙江省排污权交易的法制建设进行了具体设计,并对排污权交易的法制建设提出了可操作性建议。 相似文献
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Phenol is degraded by biological treatment, however mineralization requires long time. To decrease the time and operational cost necessary for the mineralization of phenol, an optimum operation condition of the combined biological–photocatalytical treatment was investigated. The mineralization of phenol (50 mg l−1) was conducted in a flow-type biomembrane tank combined with a batch-type TiO2-suspended photocatalytic reactor. Phenol was degraded biologically to the concentration of 6.8 mg l−1, an effective concentration for further photocatalytic treatment. After the biological treatment, the biotreated phenol was treated photocatalytically to complete the mineralization of phenol. The combined treatment shortened the mineralization time compared to the biological treatment and electric cost compared to the photocatalytic treatment only. The combined treatment may be suitable for a short-time mineralization of phenol in wastewater. 相似文献
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剩余污泥中富含有机质和营养元素可回收利用物质,污泥水解酸化液中的有机酸在去除或回收利用氨和磷后可作为进水化学需氧量(COD)不足的污水处理厂的补充碳源。通过控制pH,对比分析了不同处理方式(单独碱处理、酸-碱处理和碱-酸处理)对污泥水解酸化的影响。结果表明,单独碱处理的溶解性化学需氧量(SCOD)溶出量比酸碱联合处理要大16%左右,预处理第8天,达到5 406.1 mg/L。采用先酸(pH 4.0,4 d)后碱(pH 10.0,4 d)预处理,乙酸产量达到74.4 mg COD/g VSS,占总SCFAs的60.5%,产量及其占总短链脂肪酸(SCFAs)百分比含量均高于其他预处理方式。且酸-碱处理方式下NO4+-N和PO34--P溶出要优于其他处理方式。而单独碱处理方式下污泥减量效果最好,VSS去除率为36.6%。 相似文献
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采用液膜分离工艺处理含酚、氰农药废水,处理废水量36t/d,通过工业应用实例试运行,效果一直很好。达到了设计要求。 相似文献
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James J. Stone Erin K. Dreis Christopher D. Lupo Sharon A. Clay 《Journal of environmental science and health. Part. B》2013,48(8):752-762
The land application of aged chortetracycle (CTC) and tylosin-containing swine manure was investigated to determine associated impacts to soil microbial respiration, nutrient (phosphorus, ammonium, nitrate) cycling, and soil microbial community structure under laboratory conditions. Two silty clay loam soils common to southeastern South Dakota were used. Aerobic soil respiration results using batch reactors containing a soil-manure mixture showed that interactions between soil, native soil microbial populations, and antimicrobials influenced CO2 generation. The aged tylosin treatment resulted in the greatest degree of CO2 inhibition, while the aged CTC treatment was similar to the no-antimicrobial treatment. For soil columns in which manure was applied at a one-time agronomic loading rate, there was no significant difference in soil-P behavior between either aged CTC or tylosin and the no-antimicrobial treatment. For soil-nitrogen (ammonium and nitrate), the aged CTC treatment resulted in rapid ammonium accumulation at the deeper 40cm soil column depth, while nitrate production was minimal. The aged CTC treatment microbial community structure was different than the no-antimicrobial treatment, where amines/amide and carbohydrate chemical guilds utilization profile were low. The aged tylosin treatment also resulted in ammonium accumulation at 40 cm column depth, however nitrate accumulation also occurred concurrently at 10 cm. The microbial community structure for the aged tylosin was also significantly different than the no-antimicrobial treatment, with a higher degree of amines/amides and carbohydrate chemical guild utilization compared to the no-antimicrobial treatment. Study results suggest that land application of CTC and tylosin-containing manure appears to fundamentally change microbial-mediated nitrogen behavior within soil A horizons. 相似文献
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臭氧预氧化-BAF工艺深度处理垃圾渗滤液 总被引:4,自引:0,他引:4
以广东省江门市垃圾填埋场垃圾渗滤液为研究对象,对经SBR生化处理和聚合硫酸铁混凝后的垃圾渗滤液,采用臭氧-BAF(曝气生物滤池)工艺进行深度处理。该工艺优点在于:臭氧高级氧化技术使大分子有机污染物降解成二氧化碳和水,或者小分子有机污染物,有利于后继BAF的生化处理,且臭氧处理过后废水的色度明显降低,是废水处理的有效方法之一。而后采用曝气生物滤池对垃圾渗滤液进行进一步处理,对COD进一步去除。结果表明,当臭氧的加入量为150 mg/L,BAF停留时间>4 h,出水COD低于85 mg/L,稳定达到国家GB 16889-1997《生活垃圾填埋污染控制标准》一级排放标准,臭氧氧化法处理每吨垃圾渗滤液的费用为4.8元。 相似文献
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Petit AN Fontaine F Clement C Vaillant-Gaveau N 《Environmental pollution (Barking, Essex : 1987)》2009,157(1):130-134
The aim of this study was to determine the impact of the fludioxonil (fdx) fungicide on the diurnal fluctuation in grapevine photosynthesis. Therefore, fdx treatment was performed at the end of flowering, at 8 am, 12 am or 7 pm. The study was performed in experimental field and several photosynthesis parameters were followed one day after treatment. Morning fdx treatment induced (i) a significant and simultaneous drop of both photosynthesis (Pn) and stomatal conductance between 8 am and 4 pm and (ii) an increase of intercellular CO2 concentration when compared to control plants. On the contrary, evening fdx treatment did not affect Pn whereas midday treatment caused Pn increase after 4 pm. These data suggest that (i) morning fdx treatment results in a non-stomatal limitation of Pn, (ii) midday treatment is more suitable to treat grapevine with fdx and (iii) a phenomenon of gating was noticed. 相似文献
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分析了地区性的印染废水排放情况以及水污染治理的现状,综合比较了印染废水的主要处理工艺,对地区印染废水实施集中治理进行了初步设想,并推荐了主要处理工艺和流程,对提高行业水污染治理水平、改善区域环境质量具有探索性意义. 相似文献
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城市污水再生处理流程大多采用几种深度处理单元组合而成,由单个处理单元对污染物的去除效果来准确评价组合流程整体的处理效率对于工艺方案的确定和实际运行具有重要意义。在对处理过程中污染物浓度分布变化分析的基础上,建立了污水深度处理流程污染物去除效果的评价分析方法,并根据3种常用再生处理单元的实验结果,以总大肠菌群为例,评价了混凝沉淀过滤与生物活性炭和超滤联用处理流程对总大肠菌群的去除效果,计算结果表明,这种评价分析方法是准确可行的。 相似文献