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1.
SBR法处理模拟印染废水的实验研究 总被引：1，自引：0，他引：1
采用实验室规模的序批式活性污泥曝气反应器（SBR）工艺处理模拟的印染废水．通过实验分析了不同曝气时间、进水浓度、静沉时间与SBR处理效果之间的关系,确定了SBR法处理中低浓度的印染废水的最佳运行参数．实验结果表明,在SBR的曝气时间为8h,沉淀时间为1h的条件下,且废水进水pH值为7．5～8．6,COD—cr为8901080mg／L、氨氮为13～20mg／L、色度为350倍左右时,该工艺对CODcr、氨氮、色度等均有很好的去除效果,经处理的印染废水COD、氨氮、色度去除率分别为50％～70％、40％～67％、20％．该法具有投资少、运行费用低、操作简单的特点． 相似文献
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针对垃圾焚烧发电厂产生的废水,采用间歇式活性污泥法(SBR)对其进行处理。工艺运行结果表明,出水水质达到排放指标,并取得较好的经济效果。 相似文献
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根据酱菜废水的水质特点,采用两级SBR处理酱菜废水,对其处理效能进行了研究。结果表明：室内温度维持在17～22℃,进水有机物浓度在3000mg/L,DO为4.2mg/L,反应器运行工况为进水0.5h—曝气8h—沉淀1h—滗水0.5h—待机2小时的条件下,二级SBB反应器对BOD、COD、TN、NH4＋-N、TP的去除率分别达到98.3%、97.5%、88.7%、97.1%、52.4%。 相似文献
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对培养嗜高浓度甲醛废水的活性污泥的净化性能进行了研究,研究中采用序批式活性污泥法（SBR）及脱氮除磷工艺（A2/O工艺）．考察了停留时间、溶解氧多少、进水的pH值和水温等对微生物净化高浓度甲醛废水的影响。实验结果表明,进水的pH值在7～9范围内,水温在10～30℃,停留时间控制在48小时,并根据进水浓度的变化选择合适的溶解氧,获得的活性污泥的净化性能最佳。 相似文献
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研究了SBR法对啤酒工业废水水质变化的适应性.试验结果表明:SBR法的运行方式具有较强的抗冲击负荷性能,且出水水质优良. 相似文献
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By combining sequencing batch reactor （SBR） activated sludge process and constructed wetland （CW）, this study is to achieve the domestic wastewater treatment. Our purpose was to determine the optimum operating parameters of the combined process. The process involved advantages and shortages of SBR and CW. Under normal temperature, the 3rd cycle （SBR’s operation cycle is 8 h： inflow for 1 h, limited aeration for 3 h, sediment for 1 h, outflow for 1 h, and idling for 2 h; CW’s hydraulic retention time （HRT） is 24.8 h and hydraulic loading is 24.5 m^3/m^2 d） was the best cyclic mode. The effluents can meet the standard GB/T18921-2002： “The reuse of urban recycling water： water quality standard for scenic environment use”. In the 3rd cycle, the efficiency of CW was the maximum, and energy consumption of SBR was the minimum. Under the condition of low dissolved oxygen, the removing efficiency of chemical oxygen demand （COD） and ammonia was not affected obviously. Simultaneously, nitrification and denitrification phenomena occured and phosphorus was absorbed obviously. 相似文献
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“加压气浮＋水解酸化＋SBR”工艺在中药制药废水处理中的应用 总被引：1，自引：0，他引：1
初征 《辽宁科技学院学报》2009,11(2):46-47
采用“加压气浮＋水解酸化＋SBR”工艺处理制药厂废水,处理量为3000m^3／d,CODcr、BOD5、SS去除率分别为97．2％、99．3％和98％。出水均达到国家污水综合排放一级标准。 相似文献
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邱建华 《闽西职业技术学院学报》2004,6(2):98-99
介绍了啤酒废水的来源、减污措施及处理工艺的原理,通过工艺流程、主要设计参数等方面,综合比较接触氧化法、SBR工艺、氧化沟工艺和厌氧生物处理几种常用工艺,在此基础上提出采用厌氧-好氧联合工艺处理啤酒废水。 相似文献
10.
朱蕾 《渭南师范学院学报》2014,29(19):34-38
在处理制革废水中常用SBR工艺,试验探讨了不同HRT、进水pH、COD负荷、NH3-N浓度、活性污泥浓度的运行参数,研究SBR工艺处理制革废水的最优运行参数．结果表明：SBR反应器在进水COD为1500～2000mg／L、NH3-N为150～250mg／L、pH为7．5、运行污泥浓度在3．0g／L左右、曝气时间为18h时COD去除率能达到95％左右,NH3-N去除率达到97％左右,其出水能够达到一级出水标准． 相似文献
11.
Sewage source heat pump unit operates under partial load most of the time, and study on the law of coefficient of performance (COP) of the unit varying with load ratio can provide basis for the heat pump units running in high efficiency. A mathematical model determining COP, evaporation temperature and condensation temperature of a single unit was proposed. Under the condition of uniform load distribution, the model was established according to different ways of bearing partial load with the same type multiple units but different parallel operation models, and the operation characteristics of units were analyzed as well. Results show that the single screw water-source heat pump can maintain high COP only at 60%—100% load ratio, COP decreases sharply with the decrease of load ratio, and the units with parallel operation are controlled by the load ratio of a single unit according to the reduction of total load which can keep the average COP at high level within a wide load range. 相似文献
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A sequencing batch reactor (SBR) seeded with activated sludge was established for landfill leachate treatment. Small bio-aggregates
began to appear after 40-d operation, and gradually changed to mature aerobic granules, with a mean size of 0.36–0.60 mm.
Their sludge volume index at 5 min (SVI5 min), mixed liquor volatile suspended solids (MLVSS), and wet density were around 35 ml/g, 3.4 g/L, and 1.062 g/cm3, respectively. The settling velocities of the granules in distilled water ranged from 0.3 to 1.3 cm/s, which were faster
than those in landfill leachate with a salt content of 1.4% (w/v), and also slightly faster than those predicted by Stokes’
law for porous but impermeable particles. Microbial community evolution during the granulation process and stages under different
nitrogen loading rates (NLRs) were monitored and analyzed by polymerase chain reaction-denaturing gradient gel electrophoresis
(PCR-DGGE), cloning, and sequencing of 16S ribosomal RNA (rRNA) fragments. Results revealed that some primary and dominant
communities in inoculating activated sludge died out gradually; while a few common bacteria, inhabiting soils, municipal wastewater,
or activated sludge systems, dominated in the SBR system throughout. In addition, some other dominant species, associated
with the aerobic granulation process, were thought to play a significant role in the formation and growth of aerobic granular
sludge. During the stable operation time under low NLR, a few species were present in abundance, and may have been responsible
for the high organic removal efficiency at this time. 相似文献
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Combined treatment of landfill leachate with fecal supernatant in sequencing batch reactor 总被引：2，自引：1，他引：1
A laboratory-scale sequencing batch reactor （SBR） is used to treat landfill leachate containing high concentration of ammonium nitrogen with municipal fecal supernatant. The SBR system is operated in the following sequential phases： fill period, anoxic period, aeration period, settling period, decant and idle period. The results indicated that the average removal efficiencies of COD, BOD5, TN, NH4^＋-N were 93.76%, 98.28%, 84.74% and 99.21%, respectively. The average sludge removal loading rates of COD, BOD5, TN and NH4^＋-N were 0.24 kg/（kg SS.d）, 0.08 kg/（kg SS.d）, 0.04 kg/（kg SS.d） and 0.036 kg/（kg SS.d）, respectively. Highly effective simultaneous nitrification and denitrification was achieved in the SBR system. The ratio of nitrification and denitrification was 99% and 84%, respectively. There was partial NO2^- denitrification in the system. 相似文献
14.
20世纪80年代美国教育界的标准化改革运动对当今美国教育影响极大.此次改革以确定学生学术标准为核心,涉及六个方面的内容.尽管此次运动在“标准”的设定、测验使用等方面仍存在争议,但它在促进教育公平、完善教育标准、推进测验发展等领域对美国教育的影响和作用是巨大的.美国教育的标准化运动为我国教育的改革与发展提供了可资借鉴的经验. 相似文献
15.
为建立空气源热泵热水器COP随室外环境温度和水箱温度变化的动态模型,先测定了某一空气源热泵热水器随环境温度和水温变化的COP,引入了卡诺因子,得出了COP的拟合公式,并与测试数据进行了对比,对比表明COP的拟合公式精确度较高,能够满足实际工程应用需要。同时．为使该拟合公式对不同性能的空气源热泵热水器具有普适性,在上述公式的基础上引入COP修正系数,得出了适合不同性能空气源热泵热水器COP的拟合公式．经实验对比．表明该公式也能较好的满足实际工程应用需要。 相似文献
16.
Attheendoftheyear2000,annualglobalfluo rocarbonrefrigerantemissionfrommobileandunitaryairconditioningequipmentsislikelytosurpass100000tons,correspondingtoaglobalwarmingim pactofmorethan150milliontonsofCO2.Evenlar gerindirectCO2emissionresultsfromthegeneration ofpowerconsumedtodrivethesystems[1].Within creasingfocusongreenhousegasemissionreductions,strictregulationsontheuseofsynthesizedrefrigerants suchasHCFCsandHFCsmaybeexpected,possiblyfollowedbyphase outtargetsanddates.Theinterna tionale… 相似文献
17.
COP1(consitutive photomorphogenesis)基因是一个重要的植物基因，它编码的蛋白质COP1是一个光形态发生的抑制子。本文对COP1蛋白的结构、亚细胞定位及其在植物发育过程中抑制光形态建成的作用机制进行简要综述。 相似文献
18.
《家用空气源热泵辅助型太阳能热水系统技术条件》中对整机综合制热性能系数（COP）试验的平均环境温度和全天太阳能辐照量给出了一定变化范围,为研究这一变化对整机综合COP的影响,将整机的性能试验分两个阶段进行,其中太阳能热水系统加热段在户外进行,空气源热泵加热段在环境温度可控的环境试验室进行。试验表明在标准规定的变化范围内,平均环境温度的变化及全天辐照量的变化对空气源热泵辅助太阳能热水系统整机综合COP有较大影响．其中因平均环境温度的变化及全天辐照量的变化对太阳能热水系统性能影响而引起整机综合COP的变化较小．而因平均环境温度的变化对空气源热泵性能的影响而引起整机综合COP的变化最大可达40％左右。据此对该标准的试验方法、试验条件提出了修改建议。 相似文献
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余华明 《顺德职业技术学院学报》2008,6(2):15-17
针对使用R134a／R23混合制冷剂的自然复叠制冷系统．编制了基于NISTREFPROP的仿真程序。利用仿真和实验对系统各种优化措施的效果进行了分析和验证。两者都表明：分凝措施有利于降低系统蒸发温度、提高COP;而回热可以略微降低系统蒸发温度,但使系统COP降低、压缩机排气温度升高。 相似文献
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以对苯乙烯磺酸钠改性硝酸根型镁铝水滑石,将其与丁苯橡胶（SBR）混炼,制备水滑石/橡胶复合材料。用硫化仪、万能测试仪及热重分析仪对其结构与性能进行了研究。实验结果表明,在过氧化物硫化体系中,随着水滑石含量的增加,SBR/水滑石复合材料的焦烧时间变化幅度不大,最大小扭矩之差逐渐减小,且经过有机修饰的水滑石变化幅度更大。其次,加入水滑石后,复合材料的拉伸强度和扯断伸长率出现先增后降的趋势,在水滑石含量为3～5%时最佳;同时水滑石的加入也提高了橡胶的热稳定性。 相似文献