垃圾渗滤液膜后浓缩液混凝预处理

垃圾渗滤液膜后浓缩液是垃圾渗滤液经膜技术处理过程中产生的一种成分复杂、难以生物降解的高浓度有机废水,由于其具有高化学需氧量(chemical oxygen demand,COD)、高氨氮、高盐等特点,盐分达到饱和状态后无法结晶析出,致使后续的蒸汽机械再压缩工艺难以进行.为了后续处理工艺能够顺利进行,研究以三氯化铁、六水...     

对化学浆氯化过程的认识

论述了纸浆的氯化过程以及改进措施，给出了有效氯加入量和漂白废液有机物产生量的计算方法。表明采用较高的二氧化氯取代率氯化、１００％二氧化氯氯化以及高剪切中浓混合器的应用，是减少废液污染的有效手段。     

STUDY ON TREATING ALKALI EXTRACTION-STAGE EFFLUENT FOR COLOR REMOVAL BY MICRO-ELECTROLYSIS METHOD

INTRODUCTIONPulping and papermaking wastewaters have presented a formidable waste treatment problem for many years. Various effluents from kraft pulp and paper factories have the potential to color the receiving waters. Bleaching wastewater supplies most of the total color loading, with the caustic extraction stage being responsible for 70~75% of it [1,2]. Color interferes with aquatic life by limiting light transmittance. Color also contributes to taste problems and increases stability o…     

BIO-DEINKING OF ONP AND ITS EFFLUENT TREATMENT BY WHITE ROT FUNGUS

INTRODUCTIONIt is well known that deinking of secondary fiber can be carried out by chemical or cellulose-degrading enzymes[ 1,2]. However, due to serious pollution produced from chemical deinking and loss of yield affected by cellulosases, new approach for deinking of secondary fiber is expected. White rot fungus is a variety of microorganism that can degrade woody fiber and lignin in natural environment[3,4,5,6], lignin is one of the integrate component in secondary fiber, especially in …     

THE EFFECT OF TRANSITION METAL IONS-MANGANESE ON HYDROGEN PEROXIDE BLEACHING

INTRODUCTIONHydrogen peroxide bleaching has been extensively used in high-yield pulp bleaching. It is well known that hydrogen peroxide can be decomposed under alkaline conditions, especially when transition metal ions are present. Recent studies showed that valence of transition metal ions is a significant factor in these reactions.Among various transition metal ions, manganese ions are the most harmful species during alkaline peroxide bleaching. Manganese has seven valence electrons (3d…     

Fenton法深度处理桉木APMP废水的工艺流程

阐述广西某制浆厂Fenton法深度处理桉木APMP废水的工艺流程,并考察各处理单元的最佳工艺参数及工程应用效果。该废水处理方法工艺简单、占地面积小、运行费用低、运行稳定且处理效果好,在2个月稳定运行期间,出水化学需氧量CODCr〈90mg/L,色度〈50倍,完全符合《制浆造纸工业水污染物排放标准》（GB3544-200...     

聚合物驱不可入孔隙体积效应的室内研究及应用评价

基于聚合物互溶驱替和弥散渗流原理,利用双段塞浓度剖面法测定了聚合物溶液在长庆油田侏罗系延10储层6块岩心上的不可入孔隙体积(IPV),考察其对聚驱效果的影响。结果表明,聚合物溶液在6块岩心上的IPV值为20.6%~27.9%,平均为24.8%。岩心渗透率越高,IPV值越小,二者呈明显的线性负相关关系。IPV值与孔隙度无明显对应关系。不可入孔隙体积的大小反映聚合物分子线团与储层孔喉大小的匹配程度。M区块延10油藏聚合物驱试验结果表明,考虑聚合物驱过程中不可入孔隙体积效应的存在,在矿场注入工艺设计时适当提高注入量和增加前置保护段塞,有利于提升驱油效果。聚合物驱方案设计时考虑不可入孔隙体积效应是必要的。     

基于EHO优化的COBDP预神测经模网型络污水处理出水COD预测模型

为了改善在污水处理环节中对有关化学需氧量预测效果的问题,提出了一种经象群算法优化的 BP 神经网络预测模型。 首先通过将象群算法中的分离操作与改进权重的粒子群算法相结合,有效去除了种 群中适应度较差的个体,进一步提高算法寻找最优值的能力;首次利用改进后的象群算法优化 BP 神经网络 对预测数据进行更好的逼近,提高预测模型的预测准确度;最后,通过仿真结果清晰表明:改善后的 BP 神经 网络相对于传统 BP 神经网络以及一般的小波神经网络有着更高的预测精度。 改进后的象群算法结合 BP 神经网络所建立的预测模型在一定程度上可以对污水处理中的出水化学需氧量进行比较准确的预测,能满 足预测出水化学需氧量的一般要求,具有一定的研究价值。     

关于C-41冲洗套液药物组成的改进

本文通过实验，对Ｃ－４１工艺配方进行了改进，改进后的配方适用于目前市售所有Ｃ－４１工艺之彩色胶卷的加工，具有成本低、时间短、色彩还原好等特点     

Pilot Test of Advanced Treatments Combination of Wastewaterfor Groundwater Recharge

IntroductionInterests in artificial groundwater recharge ofreclaimed wastewater have been strengthened inrecent years in response to declining groundwaterlevels,increased vulnerability of surface watersupplies to contamination,opposition to increasedreliance upon surface water supplies and manyother reasons[14 ] .　A demonstration plantwill be builtin Beijing forartificial groundwater recharge with reclaimedwastewater effluent as a showplace and trainingcenter in China.This project was undert…