混凝—UASB—生物接触氧化处理制滤膜高浓度废水

采用混凝—UASB—生物接触氧化工艺对制滤膜过程中产生的高浓度有机废水进行处理.工程运行结果表明,在进水COD、BOD5、SS分别为15000、7 000、400 mg/L的条件下,三者的去除率均在80％以上,出水水质达到GB 8978-1996《污水综合排放标准》的三级标准要求,尾水最终排入南通开发区污水处理厂.     

污泥与麦秸共热解制备吸附剂的研究

利用外热式固定床反应器,在400～700℃范围内对脱水污泥和麦秸的混合物进行共热解,研究了热解条件对炭粉吸附特性的影响。实验结果表明：在相同的秸秆掺混比下,400℃制得的含炭吸附剂的碘吸附值最高,在406.6～542.1 mg/g之间;孔径分布较宽,以中孔为主,微孔和比表面积较小。总孔容积随热解温度的升高而增大,700℃热解的纯污泥总孔容积最大,达到0.223 6 mL/g,中孔占71.9%。污泥与秸秆以5∶5的混合比例热解后所得固体吸附剂总孔容有所下降,但孔径分布集中,中孔含量达到81.1%,大孔含量高达18.9%。     

调质-机械分离技术处理油田含油污泥

针对大庆油田含油污泥难以处理的特点,通过加入破乳剂和絮凝剂对含油污泥进行综合调质,利用调质-机械分离技术取得了油、水、泥三相分离的效果,考察了固液比、破乳剂种类及加量、温度、调质用絮凝剂的种类及加量、离心条件等因素的影响.结果表明该方法可使污油回收率达90％以上,能有效回收原油.     

污泥固体停留时间对实时控制生物脱氮SBR中亚硝酸盐积累的影响

In this study,four sequencing batch reactors(SBR),with the sludge retention time(SRT)of 5,10,20 and 40 d,were used to treat domestic wastewater,and the effect of SRT on nitrite accumulation in the biological nitrogen removal SBR was investigated.The real-time control strategy based on online parameters,such as pH,dissolved oxygen(DO)and oxidation reduction potential(ORP),was used to regulate the nitrite accumulation in SBR. The model-based simulation and experimental results showed that with the increase of SRT,longer time was needed to achieve high level of nitritation.In addition,the nitrite accumulation rate(NAR)was higher when the SRT was relatively shorter during a 112-day operation.When the SRT was 5 d,the system was unstable with the mixed liquor suspended solids(MLSS)decreased day after day.When the SRT was 40 d,the nitrification process was significantly inhibited.SRT of 10 to 20 d was more suitable in this study.The real-time control strategy combined with SRT control in SBR is an effective method for biological nitrogen removal via nitrite from wastewater.     

加压厌氧反应系统的实验运行研究

介绍了在实验室采用自制的厌氧反应器,通过增加反应器内压力来模拟增加反应器高度后对厌氧处理有机物效果的影响,并着重分析了在中温（37±1℃）环境下,容积负荷稳定在10kgCOD/（m3.d）时,在不同压力条件下,出水有机物浓度和产气量的变化。研究结果表明,在压力0.8MPa以下时,随着压力的升高,COD去除率逐渐增加,出水VFA浓度略有下降,溶于水中的气体量逐渐增加,出水pH值降低,且随着压力的增加,下降的幅度越大,溶于水中而被出水带出的气体量越大。当压力在1.0MPa左右时,较压力为0.8MPa时COD的去除率下降,出水VFA浓度略升高,溶于水中的气体量继续增加,出水pH值进一步下降。     

延长油田油泥组分分析

采用蒸馏法、灰化法、硫酸钡重量法等对延长油田的油泥砂进行了化学组分分析。结果表明,延长油田油泥中水份、泥砂、原油含量随不同来源的厂区差异较大,但硫含量均较低,介于0.055%~0.165%,油泥中的原油具有一定的回收利用价值。     

超声波辐射强化污泥蛋白质的提取

为了提取污泥胞内蛋白质,以CaO为药剂,对污泥进行了热搅拌和超声波辐射的对比实验,考察了超声波发生器输出端电流强度、作用时间、pH值对蛋白提取率的影响,通过正交试验对实验条件进行了优化,并采用SDS-PAGE对提取出的蛋白质的相对分子质量进行了分析.结果表明:超声波辐射提取污泥蛋白质的最佳工艺条件是:辐射时间20 mi...     

污泥焚烧灰渣吸附性能的研究进展

阐述了污泥焚烧灰渣的组成及性质,介绍了其吸附性能在治理废水中的研究进展。综述了污泥焚烧灰渣酸处理、盐和碱处理和微波处理等改性方法在废水处理研究领域的应用,指出了污泥焚烧灰渣吸附的应用前景。     

Model-based characterization of endogenous maintenance, cell death and predation processes of activated sludge in sequencing batch reactors

Maintenance, cell death and predation are endogenous processes of microorganisms and play an important role in governing the overall performance of biological wastewater treatment systems. However, in the previous studies on the activated sludge system, a widely used biological wastewater treatment process, the endogenous processes are summarized as a single process and the kinetics of all related processes are lumped into a single parameter set. In order to better understand the endogenous processes, efforts are made to quantify the maintenance, cell death and predation processes separately with both experimental and mathematical approaches in this work. A model-based analysis on endogenous processes of activated sludge is performed. Both oxygen uptake and biomass concentration gradually decrease with the increasing length of aerobic starvation. Model predictions are in accordance with experimental data. The active bacteria content is reduced to about 23% of the initial value after 10-day starvation, and the maintenance energy consumption rate under non-growth conditions is found to be about four times of that when the microbial growth is of its maximum level. The active microorganisms form the prey for the predator growth. The oxygen consumption related to the predation of active bacteria significantly contributes to the total oxygen consumption.     

浅析工业电镀废水污染的控制与管理

电镀企业的水污染比较严重,本文主要针对污染源的控制和治理工艺的选择进行了讨论,并提出了污泥的处理方法;最大限度的减少污染源,合理的选择处理工艺,不仅要确保处理后的水质达到排放标准,而且不能产生二次污染。