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分析了含油污泥的组成及颗粒粒径,针对性地研制了含油污泥调剖体系,并研究了含油污泥颗粒粒径与孔喉直径的匹配性.结果表明,含油污泥的含水量为13.38% ~84.07%,含油量为7.63% ~35.59%,含泥砂量为3.80%~75.89%;含油污泥颗粒的平均粒径在7~17μm左右,且80% 分布在10~25μm;当孔喉直... 相似文献
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在上流式污泥床好氧颗粒污泥反应器中,以厌氧颗粒污泥为接种泥.采用人工配制的模拟废水为进水的条件下,成功培养出具有同步脱氮除磷的好氧颗粒污泥。颗粒污泥粒径在0.5~2mm,颗粒污泥沉淀速度在29~58m/h。MLSS为3077---4103mg/L。当COD的进水容积负荷为4.8kg/(m3·d)时,去除率高达96%以上。氨氮进水在160mg/L时,去除率达97%以上,出水氨氮在5mg/L以下。对总磷的去除率在22%-37%。主要是因为亚硝态氮浓度、COD/TN比和TN/TP比等对聚磷菌除磷有影响。 相似文献
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分析了炼油厂“三泥”性质和脱水预处理对策,介绍了叠氏污泥脱水机特点原理及处理炼油企业“三泥”的典型应用实例.当处理罐底泥时,进料含水率在86.7%~90.2%时,经叠氏污泥脱水机脱水后泥饼含水率降为54.2%~55.9%;当处理剩余活性污泥时,进料含水率在95.5%~97.5%时,经叠氏污泥脱水机脱水后泥饼含水率降为78.0%~79.0%;当处理浮渣时,进料含水率在90.5%~92.0%时,经叠氏污泥脱水机脱水后泥饼含水率降为67.9%~68.7%.所处理物料的脱水泥饼的含水率均低于80%,满足污泥迸一步处理前的脱水需求,与离心机相比节电在1/10以上. 相似文献
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针对污泥水分和热值的差别,以水泥窑协同处置污泥系统为对象,通过质量和能量衡算,建立了系统运行与污泥物理参数之间的关系式,分析了污泥含水率、热值和掺烧比对窑系统废气量、燃煤消耗、熟料产量的影响.研究表明:系统废气量恒定时,掺加污泥会减少熟料产量和燃煤消耗,且随着污泥含水率和掺烧比的增加,熟料减产率和燃煤减少率增大,提出了熟料减产率可接受限值为20%时的污泥掺烧条件;生料投料量恒定时,熟料增产率随着掺烧比的增大而线性增大;生料投料量或熟料产量恒定时,燃煤增加率随着污泥含水率的增大而增大,随着污泥干基掺烧比的增大而减小,确定燃煤增加率可接受限值为5%时的污泥掺烧条件;熟料量恒定时,废气量随着污泥含水率和干基掺烧比的增加而增大,并确定熟料废气量增加率可接受限值为10%时的污泥掺烧条件. 相似文献
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以电镀污泥脱水及去除Cu为目标,通过摇瓶试验,对初始pH为3~9的电镀污泥进行为期7 d的表面活性剂/嗜酸性硫杆菌处理.结果表明,烷基糖苷(APG-10)的处理效果要优于十二烷基二甲基甜菜碱(BS-12)和鼠李糖脂.对于APG-10组,随着初始pH的上升,污泥中Cu的去除率先增大后减小,在初始pH为5时Cu的去除率达到最高的93.06%;残渣态Cu含量先上升后下降,氧化态Cu含量先下降后上升,可交换态、还原态Cu含量则几乎一直下降;当初始pH为5时,Cu的生物有效性最低、污泥的稳定性最强,残渣态Cu含量增加41.81%,可交换态、还原态及氧化态Cu含量分别减少15.95%、5.44%和24.13%,污泥比阻由pH为7时的1.56×1012 m/kg降至3.11×1011 m/kg,污泥由中等难度脱水状态转化为易脱水状态. 相似文献
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研究了污泥停留时间( SRT)分别为7、14、28 d时,采用微波-厌氧消化联合处理水解酸化残余污泥的效果.试验同时设置进泥为不经微波处理的水解酸化残余污泥的对照组.结果表明,SRT为14d时微波组SCOD去除率可达最高值84.91%;微波组和对照组在SRT为7、14、28 d的条件下对SS的去除率差异不明显,SRT由28 d缩短至7d时SS去除率仅下降了3.95%; SRT为7、14、28d时,微波组的污泥产甲烷率比对照组的分别高出39.09%、27.48%和26.75%.说明采用该联合工艺处理水解酸化残余污泥在SRT为14d时即可达到较好的效果,同时微波处理可增加水解酸化污泥的产甲烷活性. 相似文献
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本文以城市污泥和絮凝污泥为主要原料,石英和煤炭为辅料制备多孔陶瓷.通过均匀试验设计,系统研究各因素对多孔陶瓷性能的影响,找出回归方程和最佳工艺条件.多孔陶瓷制备的优化配方为:城市污泥为16.67%,石英为33.33%,絮凝污泥为25%,煤炭量为25%,煤炭颗粒为0.1 ~0.9 mm,转化时间为150min,烧成温度为1230℃.由最优配方所制备的多孔陶瓷的吸水率为57.2%,显气孔率为60.89%,体积密度为1.065 g/cm3,抗压强度为1.8 MPa,耐酸性为97.1%,耐碱性为98.3%. 相似文献
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Seong Hong Kim Woon Joong Kim Tai Hak Chung 《Korean Journal of Chemical Engineering》2002,19(3):439-444
Batch digestion experiments of biological sludge by continuous aeration and intermittent aeration were performed to find the
release characteristics of nitrogen and phosphorus in this study. Nitrogen content of the sludge increases for the endogenous
respiration period, but the content gradually decreases to the same content of raw sludge. Nitrogen removal efficiency was
up to 42.7% for 34 days by the intermittent aerobic digestion of which aeration ratio was 0.25 and the removal efficiency
was dependent on aeration ratio. Phosphorus does not release until the phosphorus content reaches a limit content. So, phosphorus
content of sludge increases gradually to this limit. After the phosphorus content of the sludge reaches this limit, phosphorus
will be released proportional to VSS reduction rate. 相似文献
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为研究二灰改良风积砂土在低温条件下的动力参数变化规律,采用改进的Hardin双曲线模型,通过室内冻土动三轴试验,展开不同试验条件下二灰改良风积砂土在负温条件下的动力特性研究.试验结果表明:随掺灰比的增加,改良风积砂土的动剪切模量先升高后下降,改良效果以掺灰比30%~40%为最佳;相同掺灰比下,冻土的动剪切模量随围压和频率的增加而增加,随冻融循环次数和温度的增加而减少.结合试验结果,对负温条件下的二灰改良风积砂土的最大动剪切模量变化规律进行了回归分析,得出最大动剪切模量与围压、频率和温度三者之间的线性方程.该成果可为解决实际工程问题提供科学性参考依据,具有一定的社会经济效益. 相似文献
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为实现河底淤泥的资源化处置,常采用水泥等胶凝材料固化淤泥提高承载力作为路基材料。传统固化材料能耗大、碳排放量高。为开发可持续性固化材料,本研究采用矿渣-粉煤灰二元地聚物固化淤泥,研究其力学性能及路用性能。通过研究Si/Al摩尔比、Na/Al摩尔比对地聚物凝结时间和抗压强度的影响规律,确定地聚物配合比设计。依据优化配合比固化淤泥,研究地聚物掺量、养护龄期对固化淤泥力学性能的影响,并对固化淤泥进行水稳性、加州承载比、干缩和温缩试验,以评估其路用性能;采用扫描电镜和X射线衍射等试验方法对固化淤泥进行微观分析,揭示其固化机制。试验结果表明,矿渣-粉煤灰基地聚物地质聚合产物为无定形地聚物凝胶、水化硅酸钙、水化铝酸钙等,增强了土颗粒之间的胶结并且填充了孔隙,提高了固化淤泥的力学性能和路用性能。研究结果为地聚物固化淤泥土工程应用提供了实验基础。 相似文献
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Asskar Janalizadeh Choobbasti Farzad Farrokhzad Ali Nadimi 《Journal of Adhesion Science and Technology》2019,33(4):433-444
To evaluate the behavior of cemented clay treated reinforced with copper sludge, 63 ultrasonic pulse velocity tests were conducted. The copper sludge content, curing period and moisture content were all varied so that the behavior of the sample could be examined. The cement content was 11% by weight clay. The copper sludge contents were 0, 5, 10, 15, 25, 30 and 35% by weight of the cement and samples were cured for 7, 28, and 60 days. The results of this study can be used for estimating of the impacts of these variables on mechanical properties of cemented clay soil treated with copper sludge. The results of this study indicates that at early age of curing time inclusion of copper sludge decreases the ultrasonic pulse velocity. The ultrasonic pulse velocity of samples at 7 and 28 days decreases by increasing copper sludge content. The ultrasonic pulse velocity of sample on the wet side is higher than wet side of the dry unit weight-moisture content curve. Moreover an optimum percentage for the copper sludge (%15) in which the behavior of cemented clay improves significantly. 相似文献
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进行了城市供水厂排泥施用于花园土壤的试验研究。单因素对照试验结果表明,土壤施用污泥后,其渗流出水中溶解磷量降低,土壤的固磷作用增强。当污泥施加量为60t/hm2时,和对照组相比,渗流液中溶解磷浓度、土壤容重分别降低了37.3%和22.9%,含水率和孔隙率较对照组分别增加了81.7%和11.0%。正交试验得出了渗流液含磷量、土壤容重等考察因素与河沙、污泥施加量关系的一次回归方程。在同一时段,土壤含水率、土壤孔隙率与河沙、给水污泥施加量呈正相关,土壤容重与土壤性质以及给水污泥加入量呈负影响,并不同程度存在交互效应。给水污泥适度施用于土壤,对其结构与理化性质的改善明显。 相似文献
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通过一种简化的反应动力学分析方法并结合实际工程应用,分析了活性污泥阶式连续流搅拌反应器(S-CSTR)的净化能力和技术特点。分析结果表明,S-CSTR系统的反应器级数越多,污泥回流比越小,其净化能力和抗污泥膨胀能力越强,抗冲击负荷能力越弱。但级数越多,设备投资也越高。 相似文献
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Graciela I. Vecchioli Oscar R. Costanza Sergio A. Giorgieri Matthias Remmler 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1997,70(4):331-336
Bioremediation is capable of reducing the hydrocarbon concentration of contaminated soil by 75–95% depending on the soil type, the kind of hydrocarbons and the history of the contamination. The impact of different number of petrochemical sludge applications to soil on the degree of PAH elimination was assessed. A simple and reliable extraction and gas chromatographic method was used to facilitate more rapid determination of hydrocarbon contamination in soils and sludge wastes. Its application in a model laboratory bioremediation experiment and a pilot field study were used to illustrate its practical benefits. Post-remediation persistence of sludge constituents was evaluated after a single dose sludge application in the laboratory and after seven sludge applications in the field. A relative increase in the concentration of some PAHs was detected at the end of the experiments, but their individual concentrations were reduced to suggested values for industrial soils. The remaining concentration of total hydrocarbons in soil was found to be similar in both experiments, pointing to soil organic matter adsorption capacity as the factor determining hydrocarbon elimination limits in soil bioremediation. ©1997 SCI 相似文献