垃圾焚烧厂渗滤液处理工程中常见问题探讨

结合在渗滤液处理设计上的经验,对垃圾焚烧厂渗滤液处理工程中出现的一些问题进行分析和探讨,希望本文能起到抛砖引玉的作用。     

膜法处理垃圾渗滤液新技术实验研究

将改进间歇式活性污泥法与FIL-MAX膜组合处理工艺相结合,应用于沈阳某垃圾场垃圾渗滤液处理工程实例中。通过实验,分析了COD、NH3-N等指标的处理效率以及影响因素,最终得出改进间歇式活性污泥法与FIL-MAX组合工艺处理在一定程度上改善膜污染、膜堵塞等常见问题。     

上海市污泥集装化运输可行性研究

随着上海市生活垃圾集装化运输系统的逐步完善和发展,上海市污泥的集装化运输逐渐被提上日程。本文通过对上海市中心城区的10座城市污水处理厂的污泥产量、污泥含水率、污泥运输道路和装卸环境等进行系统调研,综合分析和研究了上海市各污水处理厂污泥集装化运输的可行性,并进一步研究了污泥性质对集装化运输的影响。结果表明,上海市中心城区仅白龙港污水处理厂含水率约为60%的深度脱水污泥符合污泥集装化运输的要求;深度脱水污泥性质较为稳定,对各种钢材料的腐蚀性为0.00016~0.00125 mm/a,对集装化运输影响较小,但污泥释放的氨气浓度高达173.66 mg/m3,影响集装化运输,需采取水雾喷洒等措施进行控制。     

IC反应器的启动研究进展

针对IC反应器存在的启动时间较长的问题,对有关IC反应器的启动研究做一综述,为IC反应器的研究提供一定的参考和借鉴。     

日光型厌氧好氧一体化技术处理滨海农村污水

对日光型厌氧好氧一体化技术处理农村生活污水的效能进行了应用研究。系统的处理量为89t/d,HRT为1.8 d,水解酸化段水力负荷为0.78 m3/(m3·d),接触氧化段水力负荷4.24 m3/(m3·d),稳定运行6个月结果表明:该工艺对CODcr、NH3-N 、TP和SS的去除率分别为73.2%、49.5%、56.1%和79.3%,出水 CODcr、NH3-N、TP、SS的平均浓度分别在60.3 mg/L、20.4 mg/L、2.7 mg/L、26.7 mg/L以下出水水质达到GB18918-2002要求。     

低温SMBR系统中高粘性膨胀的发生与控制

利用一体式膜生物反应器(SMBR),研究了低温时的高粘性膨胀现象。结果表明:当温度为8℃,SRT为60d时发生了严重的高粘性膨胀。膨胀期间,SMBR对COD的去除并无太大影响,但NH3-N和TN的去除率降低。高粘性膨胀使膜污染速率大大增加,降低了膜清洗周期。通过调整进水配方、增加排泥次数、加大曝气量等方法控制了膨胀现象。     

啤酒废水组合处理工艺的应用与工程实例

概述国内现阶段啤酒生产废水厌氧与好氧组合处理工艺的应用,同时对某厂利用EGSB＋接触氧化＋过滤组合工艺处理啤酒废水的实际应用进行了介绍,处理后排放废水水质达到景观环境用水标准（GB/T18921-2002）,处理啤酒废水费用为0.75元/m3,同时可产生沼气作为能源利用,具有一定的经济效益。     

Mercury leaching characteristics of waste treatment residues generated from various sources in Korea

In this study, mercury (Hg) leaching characteristics of the waste treatment residues (fly ash, bottom ash, sludge, and phosphor powder) generated from various sources (municipal, industrial, medical waste incinerators, sewage sludge incinerator, oil refinery, coal-fired power plant, steel manufacturing plant, fluorescent lamp recycler, and cement kiln) in Korea were investigated. First, both Hg content analysis and toxicity characteristic leaching procedure (TCLP) testing was conducted for 31 collected residue samples. The Hg content analysis showed that fly ash from waste incinerators contained more Hg than the other residue samples. However, the TCLP values of fly ash samples with similar Hg content varied widely based on the residue type. Fly ash samples with low and high Hg leaching ratios (R_L) were further analyzed to identify the major factors that influence the Hg leaching potential. Buffering capacity of the low-R_L fly ash was higher than that of the high-R_L fly ash. The Hg speciation results suggest that the low-R_L fly ashes consisted primarily of low-solubility Hg compounds (Hg₂Cl₂, Hg⁰ or HgS), whereas the high-R_L fly ashes contain more than 20% high-solubility Hg compounds (HgCl₂ or HgSO₄).     

Performance evaluation of a completely stirred anaerobic reactor treating pig manure at a low range of mesophilic conditions

Many Chinese biogas plants run in the lower range of mesophilic conditions. This study evaluated the performance of a completely stirred anaerobic reactor treating pig manure at different temperatures (20, 28 and 38 °C). The start-up phase of the reactor at 20 °C was very long and extremely poor performance was observed with increasing organic loading rate (OLR). At an OLR of 4.3 g ODM L^?1 d^?1, methane production at 28 °C was comparable (3% less) with that at 38 °C, but the risk of acidification was high at 28 °C. At low OLR (1.3 g ODM L^?1 d^?1), the biogas process appeared stable at 28 °C and gave same methane yields as compared to the reactor operating at 38 °C. The estimated sludge yield at 28 °C was 0.065 g VSS g^?1 COD_removed, which was higher than that at 38 °C (0.016 g VSS g^?1 COD_removed).     

Effects of Al3+ on the microstructure and bioflocculation of anoxic sludge

The aluminum ions generated from mining aluminum,electrolytic aluminum and the industrial production of aluminum-based coagulants(such as AlCl_3 and Al_2(SO_4)_3) enter sewage treatment plants and interact with activated sludges.An anaerobic/anoxic/oxic(A~2 O) process was used to reveal the effects of Al~(3+) on the pollutant removal efficiencies,bioflocculation and the micro structure of sludge.The results showed that a low concentration of Al~(3+) improved the pollutant removal efficiencies and increased the sludge particle size.However,a high concentration of Al~(3+) hindered microbial flocculation and reduced the pollutant removal efficiencies.With a 10 mg/L Al~(3+) addition,the chemical oxygen demand(COD),total nitrogen(TN) and NH_4~+-N increased by 3%,16% and 27%,and reached as high as 68%,60% and 87%,respectively.At the same time,the dehydrogenase activity,flocculation ability(FA) and contact angle of the sludge reached their maximum levels at 41.3 mg/L/hr,45% and 79.63°,respectively.The specific surface area of the sludge decreased to 7.084 m2/g and the sludge pore size distribution shifted to concentrate in the me soporous range.Most of Al~(3+) was adsorbed on the surface of sludge,changing the physicochemical properties and physical structure of the sludge.