水胺硫磷降解优势菌的筛选及其降解条件的研究

本文从已驯化好的活性污泥菌是悬液中分离筛选出水胺硫磷的降解优势菌，并对其降解条件进行了实验研究，当温度为２５℃，ＰＨ为６．５～７．５，水胺硫磷进水浓度１３５ｍｇ／Ｌ，停留时间为１２ｈ，在供氧条件下，水胺硫磷降解率可达７２．３％，而混合菌在最佳条件下，其水胺硫磷降解率为５５．８％，本文还要菌种进行了鉴定。     

ASMs模型中异养菌减衰系数之间的关系及其测定

国际水协(IAWQ)推出的ASM1、ASM2、ASM2D号模型中描述微生物的衰亡过程采用了死亡-再生模式,而ASM3号模型中描述微生物的衰亡则采用了传统减衰模式,文章从两种减衰模式的机理出发,指出了两者之间的区别与联系,并详细推导了两种减衰模式中各参数之间的关系,以此得出了异养菌传统减衰系数bH'和死亡-再生减衰系数bH的测定计算方法。文中在20℃条件下,对以印染废水为主的实际污水处理厂活性污泥的异养菌减衰系数bH'和bH进行了测定,所得结果分别为0.20和0.50。     

Application of compost in agricultural practice could potentially cause contamination of foodstuffs with pathogenic bacteria such as Escherichia coli O157:H7. This study investigated pathogenic bacteria in compost collected from the compost facilities, an

IntroductionIncreasing public interests have been concerned onsafety foods and the environmental aspects recently,especially on the so-called organic foods , which are madefromcrops grown with organic fertilizers or compost but notchemical fertilizers .Pu…     

生物法净化含NO_x尾气的研究

以化纤厂废水处理曝气池的活性污泥为接种污泥 ,采用生物法处理硝酸碱吸收后的含NOx 尾气。初步研究表明 :静态、动态培养驯化挂膜后 ,可见到短杆菌属的脱氮菌 ,在进气浓度、循环液pH值、液气比等一定的条件下 ,可获得较高的脱氮效率。生物法是净化含NOx 废气的可行途径     

华南地区几种常见岩性的水土流失成因与治理措施研究

华南地区是我国经济相对比较发达的地区，随着人口的增长和区域开发进程的加快，水土流失问题日益严重。本文提出了华南地区常见的四种产生水土流失的岩性（花岗岩、石灰岩、紫色砂页岩和红色砂砾岩），并在分析了其产生水土流失的原因的基础上，提出了治理每种岩性水土流失的具体措施。     

Acid resistance of methanogenic bacteria in a two-stage anaerobic process treating high concentration methanol Wastewater

In this study, the two-stage upflow anaerobic sludge blanket (UASB) system and batch experiments were employed to evaluate the performance of anaerobic digestion for the treatment of high concentration methanol wastewater. The acid resistance of granular sludge and methanogenic bacteria and their metabolizing activity were investigated. The results show that the pH of the first UASB changed from 4.9 to 5.8 and 5.5 to 6.2 for the second reactor. Apparently, these were not the advisable pH levels that common methanogenic bacteria could accept. The methanogenic bacteria of the system, viz. Methanosarcina barkeri, had some acid resistance and could still degrade methanol at pH 5.0. If the methanogenic bacteria were trained further, their acid resistance would be improved somewhat. Granular sludge of the system could protect the methanogenic bacteria within its body against the impact of the acidic environment and make them degrade methanol at pH 4.5. The performance of granular sludge was attributed to its structure, bacteria species, and the distribution of bacterium inside the granule. Translated from Acta Scientiae Circumstantiae, 2004, 24(4): 633–636 [译自: 环境科学学报]     

硫铁矿生物法制酸及其应用研究

用细菌氧化硫铁矿产酸，然后用该酸性水去中和燃煤电厂碱性灰水。在实验室内研究了初始ｐＨ、温度及硫铁矿的投加量等因素对产酸速度的影响；试验表明：用该酸性水处理高ｐＨ、高悬浮物（ＳＳ）含量的灰水，可以达到排放或回用要求，且成本较低。     

太湖水中降解苯酚细菌的分布与降解能力研究

太湖水中降解苯酚的细菌有3个属，分别是假单胞菌属、微球菌属和芽孢杆菌属。芽孢杆菌属和假单胞菌属是降解苯酚的主要细菌。未驯化细菌对1mg/L苯酚的降解率介于70％～85％。驯化细菌对苯酚的降解能力有了很大提高，对60mg／L苯酚的降解率达到了60％，86％。CS1培养基适宜测试未驯化细菌对苯酚的降解能力，测试驯化细菌则要用CS2培养基。     

厌氧酸化-二级PSB流化床工艺处理高浓度有机废水

采用厌氧酸化+二级光合细菌(PSB)流化床的组合工艺对植物压榨发酵废水进行降解实验,一级流化床(PSB1)中填料为轻质多孔炭渣,二级流化床(PSB2)为活性炭,扰动方式分别采用机械流化和机械气动组合流化,稳定运行40d。结果表明,进水酸化12h后CODCr由80000~120000mg/L降至63000~95000mg/L,进而由系统出水回流稀释至8000~12000mg/L,进入二级流化床反应器,PSB1白天厌氧光照、夜间微好氧,PSB2白天微好氧、夜间好氧,停留48h,CODCr降至295.8~384mg/L,稳定实现96.2%以上的CODCr去除率,TN去除率为71.3%。