共查询到19条相似文献，搜索用时 109 毫秒
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着重介绍综合利用海滨的巨大风能和地场对电镀污泥酸解液进行自然浓缩、结晶提取浸出液中的铜、镍、铬、锌等金属及其化合物的工艺方法,进而阐述利用天然海边晒场资源浓缩结晶回收电镀污泥中的有价金属,既节能,又环保,可实现循环生产。 相似文献
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活性污泥沉降性能影响因素的分析研究 总被引：4，自引：0，他引：4
该文探讨了活性污泥沉降性能与生长因子的相关性,结果表明,当pH值为8.0的时候,活性污泥的沉降比和污泥指数最好.通过方差分析和显著性分析,pH值、C、N、P各因素对活性污泥的沉降比的影响差异不显著,而各因素间对活性污泥指数的差异是显著的.N对活性污泥指数影响的效果显著高于C,也高于P;pH值对活性污泥指数影响的效果显著于C和P;N、pH、P与C对活性污泥指数影响的效果差异不显著. 相似文献
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综述了好氧颗粒污泥颗粒化研究进展及好氧颗粒污泥处理技术在废水生物处理中的应用．着重讨论了好氧颗粒污泥的形成机理,分析了好氧颗粒污泥培养过程中的影响因素,以及好氧颗粒污泥技术在废水生物处理和工程应用中的研究进展．好氧颗粒污泥的形成、发展和成熟过程可分为5个不同阶段,污泥颗粒化过程取决于基质组成与负荷、适当的水力选择压和工艺操作参数等因素． 相似文献
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《实验室研究与探索》2016,(2)
排水系统性能的影响因素众多,为了对其量化研究,将排水量作为衡量排水性能的指标,研究了不同影响因素的变化对排水量的影响。结果表明:对于设计参数而言,排水系统入口阻抗相对于其他参数对排水量大小的影响最小;排水沟土壤表面以下的水位深度对排水量的大小影响最大;排水沟间距的影响(尤其是排水沟间距较小的情况)也不容忽视。另外,对于非设计参数而言,气候因素和城市土地利用率对地下排水系统性能的影响类似,在对未来排水系统性能进行预测时,这两个因素均要考虑。 相似文献
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数据库管理是数据管理的重要部分,是计算机学科的重要分支。数据库性能的好坏直接决定着数据库应用系统的运行效率。在阐述影响数据库性能的主要因素的基础上,结合实际探讨了优化数据库性能的一些策略,分析和比较了不同策略可能对数据库性能的具体影响。 相似文献
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《嘉应学院学报》2017,(8):50-55
以污水厂的活性污泥为吸附剂,对水溶液中的直接耐晒黑G(Direct Black G,DB G)进行吸附性能研究.考察了污泥pH、吸附时间、污泥量、离子浓度和温度等对吸附的影响,对吸附热力学和吸附动力学进行了探讨.结果表明,污泥可以快速吸附水中的DB G,污泥吸附DB G时最佳污泥pH为1;离子浓度和温度变化对污泥吸附DB G的影响很小;Freundlich方程可以较好的描述DB G在污泥上的吸附等温过程;污泥对DB G的吸附行为可以用假二级动力学来描述,其吸附过程受膜扩散和颗粒扩散的共同影响,DB G质量浓度越高,前者影响作用越大.热力学分析表明污泥对DB G的吸附为自发、吸热过程,温度升高自发进行的趋势增大. 相似文献
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INTRODUCTION limiting conditions, obligatory aerobic and an- aerobic bacteria will survive in a mixed culture Sequential anaerobic/aerobic wastewater treat- (Gerritse et al., 1992). Little is know about thement has received increasing attention for effective change in the activity of anaerobic bacteria whennutrient removal, enhanced de… 相似文献
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陈红 《浙江大学学报(A卷英文版)》2004,5(6):727-732
Specific ATP content of volatile solids was measured to characterize the sludge activity in a sequential anaerobic/aerobic wastewater treatment system, with an upflow anaerobic sludge blanket (UASB) reactor and a three-phase aerobic fluidized bed (AFB) reactor. The wastewater COD level was 2000(3000 mg/L in simulation of real textile wastewater. The ATP content and the specific ATP contents of volatile solids at different heights of the UASB reactor and those of the suspended and immobilized biomass in the AFB reactor were measured. In the UASB reactor, the maximum value of specific ATP (0.85 mg ATP/g VS) was obtained at a hydraulic retention time (HRT) 7.14 h in the blanket solution. In the AFB reactor, the specific ATP content of suspended biomass was higher than that of immobilized biomass and increased with hydraulic retention time reaching a maximum value of 1.6 mg ATP/g VS at hydraulic retention time 4.35 h. The ATP content of anaerobes in the UASB effluent declined rapidly under aerobic conditions following a 2nd-order kinetic model. 相似文献
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A sequencing batch reactor (SBR) seeded with activated sludge was established for landfill leachate treatment. Small bio-aggregates
began to appear after 40-d operation, and gradually changed to mature aerobic granules, with a mean size of 0.36–0.60 mm.
Their sludge volume index at 5 min (SVI5 min), mixed liquor volatile suspended solids (MLVSS), and wet density were around 35 ml/g, 3.4 g/L, and 1.062 g/cm3, respectively. The settling velocities of the granules in distilled water ranged from 0.3 to 1.3 cm/s, which were faster
than those in landfill leachate with a salt content of 1.4% (w/v), and also slightly faster than those predicted by Stokes’
law for porous but impermeable particles. Microbial community evolution during the granulation process and stages under different
nitrogen loading rates (NLRs) were monitored and analyzed by polymerase chain reaction-denaturing gradient gel electrophoresis
(PCR-DGGE), cloning, and sequencing of 16S ribosomal RNA (rRNA) fragments. Results revealed that some primary and dominant
communities in inoculating activated sludge died out gradually; while a few common bacteria, inhabiting soils, municipal wastewater,
or activated sludge systems, dominated in the SBR system throughout. In addition, some other dominant species, associated
with the aerobic granulation process, were thought to play a significant role in the formation and growth of aerobic granular
sludge. During the stable operation time under low NLR, a few species were present in abundance, and may have been responsible
for the high organic removal efficiency at this time. 相似文献
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对目标污泥进行试验分析,获得最佳工艺条件后将含油污泥在经搅拌后静置分离,原油回收,泥水经机械脱水过滤。过滤后油泥利用氧化钙将除油后污泥在干燥反应器内发生的热化学反应,将细胞水在反应器内大部分蒸发,达到脱水、杀菌等目的。利用微波加热器将部分低温蒸汽加热至250℃以供再次强化干燥。经试验测定,经增钙干化后处理污泥含水率控制在35%以内。 相似文献
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为了快速培养出能同时去除生活污水中化学需氧量(COD)和氮的微氧颗粒污泥,采用膨胀颗粒污泥床(EGSB)反应器接种污水处理厂剩余污泥,研究了微氧颗粒污泥的培养过程以及稳定运行条件下供氧量对处理效果和污泥性能的影响。结果表明,水力停留时间(HRT)为6h,微氧颗粒污泥的成功培养仅需1个月;供氧速率在2.83.2gO2/d,COD,NH3-N和总氮(TN)的去除率最高分别可达91%,85%和81%,脱氮速率达1.7gN/d,出水水质最佳;成熟的微氧颗粒污泥粒径集中在0.453.2gO2/d,COD,NH3-N和总氮(TN)的去除率最高分别可达91%,85%和81%,脱氮速率达1.7gN/d,出水水质最佳;成熟的微氧颗粒污泥粒径集中在0.452mm,当供氧速率低于2.3gO2/d时,颗粒污泥结构致密,供氧速率在2.32mm,当供氧速率低于2.3gO2/d时,颗粒污泥结构致密,供氧速率在2.33.2gO2/d时,污泥性能稳定,供氧速率增加到3.2gO2/d时,污泥沉降性能下降,并出现颗粒解体和丝状菌生长优势。 相似文献
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潘周光 《浙江工贸职业技术学院学报》2011,11(3):68-71
通过印染废水特性、印染污泥化学成分对印染污泥热值影响的试验研究,结果表明印染污泥有较高的燃烧热值,是一种潜在的可再生资源,但受印染废水特性和印染污泥化学成分的影响。印染污泥经过适当的处理作为新能源加以利用是一种既环保又节能的处理方法。 相似文献
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目前常规的活性污泥处理的方法都存在投资大、处理成本高等各种问题,本文介绍了剩余污泥可溶化回流氧化处理技术及其尚待改进的问题,并重点列举了臭氧、超声波法处理剩余污泥工艺的应用实例和研究现状.为达到污泥零排放的目的并能从本质上减少污泥排放量提出了未来的发展方向和研究方向. 相似文献
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污泥热干化是能够实现减量化、无害化、稳定化的处理工艺,已是处理污泥的主流手段。本文针对污泥干化工艺全过程存在的不安全因素,及其安全性进行了分析,对安全评价方法做了较全面的论述,应用安全三元评价法对污泥干化全过程进行了评估,对指导污泥干化的实践,预防事故,保护环境,有一定的现实意义。 相似文献
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The mechanical dewatering of activated sludge is difficult due to its high compressibility, which can be improved by electroosmosis. In electroosmosis, direct electric field is applied to sludge cake. Based on the conductivity modes of different sludge beds, a model is presented in which sludge cake consists of two series parts in the circuit: a dewatered bed and an undewatered one. The dewatered bed called solid conductor is mainly made up of immovable water and sludge particles. The undewatered bed includes movable water and solid conductor, which are connected in parallel in the circuit. The model describes the variation of water content with time and electric power consumption as a function of water content in sludge cake, and interprets the reason for the variation of electroosmotic dewatering rate. Comparison with the experimental data for electroosmotic dewatering under constant voltage supports the validity of the model. 相似文献