生活污水回用作循环冷却水补充水处理方案的研究

分析了自来水及经膜生物反应器处理后的生活污水的水质指标，计算了水质判断指数，结果表明两者均为腐蚀性水质。通过静态缓蚀实验筛选合理的药剂，结果表明HEDP，ATMP，PBTCA的最高缓蚀率均高达90％以匕，HEDP，PBTCA与Zn^2＋复配的协同效果较好，复配后最高缓蚀率提高到98％以上。研究了考虑阻垢问题时的水处理药剂配方，通过正交试验筛选出最佳药剂浓度配方为：T-325：PBTCA：Zn^2＋=8：4：3。     

滇东主要断裂带温泉CO_2成因浅析

通过对滇东主要断裂带上典型温泉的地质背景、环境条件、水化学及碳、氦稳定同位素分析,探讨这些温泉CO2释放的一般规律。分析表明滇东主要断裂带温泉具有特殊的碳来源,其CO2释放与沿小江断裂混杂第三纪煤层(褐煤)有关。     

微型反应柱在含铬废水处理试验研究中的应用

针对镀铬车间废水,采用活性炭吸附处理法对Cr6 和Cr3 的去除效果进行了系统的试验.通过微型反应柱集成装置对穿透时间、吸附容量及活性炭再生方法进行了研究,动态试验表明该装置能有效地处理含铬废水.     

A~2/O法应用于酒店污水处理工程的实例

某酒店污水处理工程设计规模 80 0m3 d ,进水CODCr2 50～ 30 0mg L ,BOD51 50～ 1 0 0mg L ,SS 1 4 0～ 1 2 0mg L ,氨氮2 5mg L ,动植物油 50mg L。采用处理工艺 ,2年来的运行效果显示 ,出水水质稳定达到广东省《水污染物排放限值》(DB4 4 2 6 2 0 0 1 )第二时段第一级标准。     

Purification and molecular weight distribution of a key exopolysaccharide component of Bacillus megaterium TF10

Extracellular polymeric substances (EPS) are organic metabolic compounds excreted by microorganisms. They largely impact microbial aggregate structures and functions. Extracellular polysaccharides (EP) in EPS are responsible for the formation of microbial aggregates. In this work, we successfully separated and characterized EP from EPS of the bacterium Bacillus megaterium TF10. Extraction of EP from EPS was optimized using Sevag''s reagent. Chemical characteristics, functional groups, and molecular weight (MW) distribu-tion of EP were compared with the harvested EPS and soluble microbial products (SMP). We found that the polymers of lower MW and free proteins were successfully removed by Sevag''s reagent. The higher MW components of EPS were predominantly polysaccharides, while the polymers of lower MW tended to secrete to the supernatant and were described as SMP. A part of the proteins in the EP was polysaccharide-bonded. Our results can be further used in elucidating the complex flocculation mechanisms in which EP play a major role.     

Shifts in microbial community structure and diversity in a MBR combined with worm reactors treating synthetic wastewater

The chemical oxygen demand (COD) and NH₃-N removal, membrane fouling, sludge characteristics and microbial community structure in a membrane bioreactor (MBR) coupled with worm reactors (SSBWR) were evaluated for 210 days. The obtained results were compared to those from a conventional MBR (C-MBR) operated in parallel. The results indicated that the combined MBR (S-MBR) achieved higher COD and NH₃-N removal efficiency, slower increase in membrane fouling, better sludge settleability and higher activities of the related enzymes in the activated sludge. Denaturing gradient gel electrophoresis was used to analyze the microbial community structures in the C-MBR and the S-MBR. The microbial community structure in the S-MBR was more diverse than that in the C-MBR. Additionally, the slow-growing microbes such as Saprospiraceae, Actinomyces, Frankia, Clostridium, Comamonas, Pseudomonas, Dechloromonas and Flavobacterium were enriched in the S-MBR, further accounting for the sludge reduction, membrane fouling alleviation and wastewater treatment.     

预处理-气浮-氧化沟工艺处理再生纸废水

介绍了预处理-气浮-氧化沟工艺在再生纸废水处理工程中的应用。运行结果表明:该工艺处理效果稳定,耐冲击负荷能力强,进水ρ(COD)、ρ(BOD5)、ρ(SS)分别为1542,654,2254mg/L时,出水分别为77,38,22mg/L,系统出水水质达GB3544-2001《造纸工业水污染物排放标准》。