共查询到20条相似文献,搜索用时 62 毫秒
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采用UASB+二级SBR工艺处理皮革废水,在进水COD为8256 mg/L,BOD5为858 mg/L,SS为389 mg/L时,经该工艺处理后的废水能达到《污水综合排放标准》(GB8978-1996)的Ⅰ级标准,COD、BOD5和SS的去除率分别为99%、98.6%和97.4%。 相似文献
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介绍了UASB+两级接触氧化+混凝沉淀组合工艺处理豆制品加工废水的工程实例。运行结果表明,该工艺处理效果稳定,出水平均COD、BOD5分别为64、20 mg/L,SS、NH3-N平均质量浓度分别为39、9 mg/L,出水水质达到污水综合排放标准(GB 8978-1996)排放标准一级标准。 相似文献
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采用气浮+SBR+液氯消毒工艺处理小蓝工业园废水,一期工程技改后设计规模为25000m3/d,进水水质为COD 600mg/L,BOD5220mg/L,SS 200mg/L,色度80倍,pH值6.5-8.5;经该工艺处理后,出水水质为COD≤100 mg/L,BOD5≤30mg/L,SS≤30mg/L,色度40倍,pH值6-9,达到了国家《城镇污水处理厂污染物排放标准》(GB18918-2002)二级排放标准的要求。 相似文献
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在原有废水处理设施的基础上,对原有水处理工艺进行了改造,强化了预处理过程,采用UASB+CASS工艺处理乳酸生产废水,在进水COD为3 256 mg/L、BOD5为1 320 mg/L、SS和NH3-N的质量浓度分别为635、31 mg/L时,出水水质稳定,COD为98mg/L、BOD5为26mg/L、SS和NH3-N的质量浓度分别为75和22mg/L,达到GB8978-1996表4中规定的二级要求,去除率分别可达到97.0%、98.0%、88.2%和29.05%。该项工程可为类似高含量有机废水的处理提供参考。 相似文献
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江西某纺织企业采用初沉+水解酸化+CASS+混凝沉淀吸附+过滤组合工艺处理纺织工业印染废水,处理水量为8 000 m3/d。调试运行结果表明,当进水COD、BOD5、SS分别为2 000、450、300 mg/L,色度为800倍时,出水COD、BOD5、SS分别为54、10、30 mg/L,色度为30倍,平均COD、BOD5、SS和色度去除率分别为97.3%、97.8%、90.0%和96.3%,出水水质稳定,达到《纺织染整工业水污染物排放标准》(GB 4287—2012)中新建企业水污染物排放限值的要求。 相似文献
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采用气浮+水解酸化+气浮+气浮过滤工艺处理小蓝工业园二期工程废水,二期工程设计规模为50000m3/d,进水水质为COD 600mg/L,BOD5400 mg/L,SS 400mg/L,色度80倍,p H值6-9;经该工艺处理后,出水水质为COD≤100 mg/L,BOD5≤30mg/L,SS≤30 mg/L,色度40倍,p H值6-9,达到了国家《城镇污水处理厂污染物排放标准》(GB18918-2002)二级排放标准的要求,并且预先对今后提标进行先期部分考虑。 相似文献
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卤代硅烷的相平衡数据为硅烷生产所需,而这方面的研究又较缺乏,尤其是甲基乙烯基二氯硅烷生产中所需的汽液相平衡数据尚未见报道.今用新型泵式沸点仪测定了常压(101.325 kPa)下甲基二氯硅烷 甲基三氯硅烷 二甲基二氯硅烷 苯四元系及其四个三元体系和六个二元体系在不同液相组成时的泡点.由所测的二元系数据,用过量自由焓Q函数间接法推算了与之平衡的汽相组成.再用最小二乘法求出二元体系的最佳配偶液相活度系数模型参数.所得的六组最佳二元系Wilson模型参数符合热力学一致性,并用于该体系三元和四元系汽液相平衡数据的预测,将计算的泡点与实验测得的泡点作了比较,其拟合精度良好,关联结果令人满意,硅烷二元系、多元系的热力学模型及VLE数据可为该体系的分离设计提供必要的理论依据. 相似文献
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应用水热技术制备了二元Ni2+-Fe3+-CO23- LDHs和三元Co2+-Ni2+-Fe3+-CO32- LDHs,以十二烷基磺酸根离子作为插层客体,通过离子交换反应在酸性溶液中实现了十二烷基磺酸根插层Ni2+-Fe3+ LDHs和Co2+-Ni2+-Fe3+-LDHs。十二烷基磺酸根在Ni2+-Fe3+LDHs层间出现了2种空间导向和排列:即十二烷基磺酸根以单层垂直方向排布和以双层垂直方向排布在层间;十二烷基磺酸根在三元组分Co2+-Ni2+-Fe3+-LDHs层间只有一种空间排列方式,即十二烷基磺酸根以单层垂直方向排布于Co2+-Ni2+-Fe3+-LDHs层间。 相似文献
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Erevan. Translated from Fizika Goreniya i Vzryva, Vol. 26, No. 5, pp. 33–36, September–October, 1990. 相似文献
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The partition coefficients of ethylene between hydrate and vapor for methane + ethylene + water and methane + ethylene + SDS + water systems 总被引:1,自引:0,他引:1
The hydrate formation of CH4+C2H4 mixture was studied experimentally in two different cases, with and without the presence of sodium dodecyl sulfate (SDS) in water. The results manifested that the presence of SDS could not only accelerate the hydrate formation process, but also increase the partition coefficient of ethylene between hydrate and vapor drastically. The partition coefficients of ethylene between hydrate and vapor for methane + ethylene + water with the presence of 500 ppm SDS in water were then systematically measured. The experimental temperature ranged from 273.15 to 278.15 K, the pressure ranged from 2.5 to 5.5 MPa, the initial gas-liquid volume ratio ranged from 95 to 240 standard volumes of gas per volume of liquid, and the mole percentage of ethylene in feed gas mixture ranged from 5.28% to 79.36%. The results demonstrated that ethylene could be enriched in hydrate phase and partition coefficients were increased with the presence of SDS in water. This conclusion is of industrial significance; it implies that it is feasible to recover ethylene from gas mixture, e.g., various kinds of refinery gases or cracking gases in ethylene plant, by forming hydrate. 相似文献
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研究了Na+-Ca2+-Mg2+与钠型斜发沸石和NH4+-Ca2+-Mg2+与铵型斜发沸石的离子交换平衡,分别测定出2个体系的离子交换平衡数据,并利用三维坐标绘制出三元离子交换平衡等温面,计算出改型沸石对体系中离子的分离因数. 结果表明,在Na+-Ca2+-Mg2+溶液体系中,Na+的分离因数>10,Ca2+的在0.4~10之间,Mg2+的小于0.4,斜发沸石离子交换顺序为Na+>Ca2+>Mg2+,且温度升高Ca2+和Mg2+的交换能力增强,而低温则有利于沸石对Na+的选择;在NH4+-Ca2+-Mg2+溶液体系中,NH4+的分离因数>15,Ca2+的在0.2~1.5之间,Mg2+的小于0.2,斜发沸石离子交换顺序为NH4+>Ca2+>Mg2+,且温度升高Ca2+和Mg2+的交换能力增强,NH4+的选择性降低. 相似文献
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W. E. Blake J. Randle 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1967,17(12):358-360
Very dilute solutions containing zinc sulphate, sodium and sulphuric acid were passed down a column of Zeo-Karb 225 cation-exchange resin, and the volume at which zinc first appeared in the effluent (breakthrough volume), together with the volume at which the concentration of zinc in the effluent became equal to its concentration in the influent (equivalent volume), were determined. 相似文献
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Erevan. Translated from Fizika Goreniya i Vzryva, Vol. 26, No. 6, pp. 120–124, November–December, 1990. 相似文献
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A chemical model,based on Pitzer activity coefficient model,is developed with a speciation approach to describe the solubility and chemistry of nesquehonite in concentrated chloride solutions.The chemical equilibrium constants for nesquehonite and aqueous species,i.e.0 3 MgCO,3 MgHCO,and MgOH +,are precisely calculated as a function of temperature according to the Van’t Hoff equation by use of standard Gibbs free energy,standard formation enthalpy and heat capacity.The most recent solubility data are regressed to obtain new Pitzer parameters with good agreement.The predictive ability of the new model is improved significantly in comparison with previous models.The behavior of speciation chemistry for nesquehonite in various chloride media is explained through this modeling work on the basis of the 2 3 Mg /CO bearing species distribution,activity coefficient and pH changes. 相似文献
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高聚物萃取分离光度法测定Pb2+ 总被引:5,自引:0,他引:5
《化学世界》2003,44(4):185-187
利用非挥发性水溶性高聚物的水溶液在无机盐存在下可分成两相的特点,讨论了Pb2+、Cd2+、Co2+、Cu2+、Fe3+、Ni2+、Zn2+混合液中Pb2+的分离和测定条件,实现了Cd2+、Co2+、Cu2+、Fe3+、Ni2+、Zn2+与Pb2+的定量分离和测定,结果表明方法简便、可靠、快速,在Pb2+含量0~4.0μg/mL范围内有良好的线性关系.回收率在95%~105%. 相似文献