共查询到19条相似文献,搜索用时 187 毫秒
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可用于造纸废水处理的抗性菌株选育及处理效果研究 总被引:2,自引:1,他引:2
用逐步提高底物浓度的方法 ,定向选育出抗造纸废水毒性并能有效降低废水CODCr含量的几株高效白腐菌株 ,对其中Z - 1、Z -2和Z - 3等 3株菌株处理造纸中段废水的效果进行了研究。结果表明 ,3种菌株均可以有效地降低废水的CODCr含量 ,但其各自的处理效果有所不同。菌株Z - 1可以有效地降低废水的CODCr及使废水脱色 ,同时还可以降低废水的pH值 ,处理 4天后 ,色度降低 82 61 % ,处理 6天 ,CODCr含量降低 63 44% ,废水pH值从中性下降到pH值 2左右的水平 ;而菌株Z - 2和Z - 3在降低废水CODCr含量的同时 (其中用Z - 2处理 2天 ,CODCr含量下降 69 1 5% ) ,废水的色度有所增加 ,但pH值在处理过程中基本保持稳定。就处理效果而言 ,其顺序为Z -1 >Z - 2 >Z - 3。此外 ,用驯化后的菌株Z - 1直接处理蒸煮浓黑液也表现出了良好的效果 ,显示出菌株Z - 1具有良好的工业应用前景。 相似文献
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在摇床培养条件下将白腐菌菌丝团接入脱墨废水中,在不添加任何外源营养物的条件下,1~2d内白腐菌生长比较缓慢,外观没有明显变化.生长至第3d时,白腐菌菌丝体发生了明显的变化,呈现舒展的团块状.在第7d时,白腐菌处理后废水的CODCr去除率最高可达57.1%;在第7d后,CODCr不再降低.在pH值3.0~4.5的范围内,白腐菌生长最好.未经处理的脱墨废水包括压榨后废水、浮选后废水和混合废水,污染物出峰时间主要集中在tR<25min,表明废水中污染物以低分子质量的居多.经白腐菌处理后,污染物的GC色谱峰减少很多,表明这些物质得到了降解. 相似文献
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无机复合混凝剂处理造纸综合废水 总被引:7,自引:0,他引:7
用煤矸石及硫铁矿烧渣作原料制备了一种高效复合混凝剂聚硅酸铝铁(PSAF),并将其用于造纸综合废水的处理.结果表明,在较宽的pH值范围内,PSAF混凝剂对废水有很好的处理效果.在常温、pH值7.0、PSAF用量50mg/L的条件下,SS、CODCr和色度的去除率分别为96.5%、88.6%、92.3%;温度对CODCr去除率的影响不大;与传统混凝剂Al2(SO4)3和FeCl3相比,PSAF混凝剂具有混凝沉降速度快、处理废水后水中残余量低、处理废水费用低等特点.文中还探讨了混凝剂对造纸废水的混凝沉降机理. 相似文献
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以Fenton氧化处理造纸废水产生的污泥为原料,复配粉煤灰、煤泥、羧甲基纤维素钠,采用高温热解的方法制备铁泥基催化剂。以废纸造纸二沉池出水为目标污染物,并以CODCr去除率和色度去除率作为评价指标,研究了非均相Fenton深度处理过程中铁泥基催化剂对废水的处理效果。结果表明,铁泥基催化剂的比表面积为230 m~2/g;当反应体系初始pH值为2.5、催化剂投加量15 g/L、m(CODCr)∶m(H2O2)=1∶1.5、反应时间100 min时,CODCr去除率为66.7%,色度去除率高于80%,污泥产量比均相Fenton降低了91%~94%。 相似文献
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用聚合氯化铝(PAC)和聚合氯化铁(PFC)对造纸废水进行混凝实验,通过它们在不同pH值和投加量的情况下,对废水色度、CODCr的去除率进行分析,以选择最佳混凝剂及混凝条件。实验结果表明,在pH值为8,混凝剂投加量为30 mg/L时,用PFC混凝剂处理造纸废水比用PAC效果好且更经济,其脱色率达到90%,CODCr去除率可达43%。 相似文献
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探讨了黄孢原毛平革菌和红假单胞菌生物强化活性炭对造纸废水色度、COD的去除效果。结果表明,只投加1%黄孢原毛平革菌时,在处理时间180 min后造纸废水的脱色率达80%以上,CODCr去除率达65.1%;只投加1%红假单胞菌脱色效果较差,但CODCr去除率为71.4%;两种菌体组合投加造纸废水,脱色率随着时间的延长可达到90%以上,CODCr去除率均高于单一菌种的效果,达80%左右,其中先经红假单胞菌后经黄孢原毛平革菌生物强化活性炭的组合对造纸废水CODCr去除率高于先经黄孢原毛平革菌后经红假单胞菌生物强化活性炭的CODCr去除率。 相似文献
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Alkaline pretreatment of straw materials prior to enzyme hydrolysis is a key step for bioconversion of lignocellulose to bioethanol and chemicals. Wastewater from the alkaline pretreatment process must be treated before discharge to minimize its environmental impact. In this study, biotreatment of the wastewater from soda-pretreatment process of corn stover was investigated using fungus Z-6, and some indexes such as color, chemical oxygen demand (COD), and lignin content of wastewater before and after biotreatment were determined to assess the effect of the biotreatment. Results showed that fungus treatment could remove color up to approximately 72% after 2 d, and decrease COD and lignin content by about 63% and 60%, respectively after 3 d. The wastewater was fractionated using dynamic ultrafiltration method, and the changes in lignin contents of the effluent fractions with different molecular weights before and after biotreatment were analyzed. Some compounds produced by the fungus during treatment were identified using gas chromatography-mass (GC-MS) spectrometer, which revealed that depolymerization of lignin occurred during the biotreatment process. 相似文献
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Two advanced oxidation processes (AOPs), TiO2/UV/O2 and TiO2/UV/Cu (II), were used to remove color from a Kraft bleaching effluent. The optimal decoloration rate was determined by multivariate analysis, obtaining a mathematical model to evaluate the effect among variables. TiO2 and Cu (II) concentrations and the reaction times were optimized. The experimental design resulted in a quadratic matrix of 30 experiments. Additionally, the pH influence on the color removal was determined by multivariate analysis. Results indicate that color removal was 94% at acidic pH (3.0) in the presence of Cu (11) as an electron acceptor. Under this condition, the biodegradation of the effluent increased from 0.3 to 0.6. Moreover, 70% of COD (chemical oxygen demand) was removed, and the ecotoxicity, measured by Daphnia magna, was reduced. Photocatalytic oxidation to remove the color contained in the Kraft mill bleaching effluent was effective under the following conditions: short reaction time, acidic pH values, and without the addition of oxygen due to the presence of Cu (II) in the effluent. Moreover, residual Cu (II) was a minimum (0.05.mg L(-1)) and was not toxic to the next biological stage. The experimental design methodology indicated that a quadratic polynomial model may be used to representthe efficiencyfor degradation of the Kraft bleach pulp effluent by a photocatalytic process. 相似文献
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Fe0-H2O2法深度处理草类制浆造纸中段废水 总被引:2,自引:0,他引:2
采用Fe0-H2O2法对制浆造纸中段废水二级处理后的出水进行了深度处理,考察了pH值、Fe/C比、H2O2投加量和载气等不同的操作条件,结果表明:在pH值为3.0、Fe/C(体积比)为2、H2O2投加量为50 mg/L的条件下对污染物去除有利,温度能够加快反应速度;载气不仅能够提高反应效率,且节省H2O2用量。Fe0-H2O2工艺对中段废水的色度去除率超过98%、对CODCr的去除率在77%以上,紫外吸收光谱表明该工艺可有效去除或降解氯化木素。 相似文献
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纸厂三废综合治理利用技术 总被引:1,自引:0,他引:1
本文介绍煤渣、含SO2烟气、造纸中段碱性废水综合治理利用技术。达到的指标是:湿式脱硫设备的脱硫率98.0%,烟气总除尘率99.0%,煤渣回收率98.5%。沉淀池排水指标CODcr<100mg/L,BOD5<50mg/L。处理1m3混合废水的费用为0.02元,开辟了一条治理造纸中段碱性废水的新路子。 相似文献