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).     

水泥粉尘的比电阻及其测量

水泥粉尘经粒径分级，得粒径相对集中之各级粉尘，分别测定比电阻，从而找出水泥粉尘粒径、温度与比电阻的规律，为改进和合理使用电除尘器提供依据     

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.     

Sludge-grown algae for culturing aquatic organisms: Part I. Algal growth in sludge extracts

This project is aimed at studying the feasibility of using sewage sludge to prepare culture media for microalgae (Chlorella-HKBU) and the use of the sludge-grown algae as a feed for some aquatic organisms. Part I of the project included results on preparing sludge extracts and their use on algal culture. By comparing two culturing techniques, aeration and shaking, it was noted that both lag and log phases were shortened in the aeration system. A subsequent experiment noted that algal growth subject to aeration rates of 1.0 and 1.5 liters/min had similar lag and log phases. In addition, both aeration rates had a significantly higher (P < 0.05) final cell density than that of 0.5 liters/min. A detailed study on the variation of growth conditions on the algal growth was done. The results indicated that pH values of all the cultures declined below 5 at day 12. The removal rates of ammonia N ranged from 62% to 70%. The sludge-grown algae contained a rather substantial amount of heavy metals (µg/g): Zn 289–581, Cu 443–682, Ni 310–963, Mn 96–126, Cr 25–118, and Fe 438–653. This implied that the rather high levels of heavy metals may impose adverse effects on higher trophic organisms.     

豆奶粉废水生物处理技术

维维集团第二生产基地污水处理设施为全国第一套豆奶粉废水处理设施。该设施采用了“ＵＡＳＢ（ＡＦ）—活性污泥法”工艺。其中ＵＡＳＢ（ＡＦ）反应器是国内最大规模的生产性ＵＡＳＢ装置之一。     

污泥中重金属性质分析及处理方法实验研究

选取典型城市污水厂污泥进行重金属总量及形态分析，确定超标重金属的含量、形态，并选择重金属稳定化方法对污泥中的重金属进行了初步实验。通过实验，结果证明了重金属的稳定化是污泥农用中重金属控制的有效方法，并给出了进一步研究的目标和建议。