Petrochemical wastewater treatment with a pilot-scale bioaugmented biological treatment system

In solving the deterioration of biological treatment system treating petrochemical wastewater under low temperatures, bioaugmentation technology was adopted by delivering engineering bacteria into a pilot-scale two-stage anoxic-oxic (A/O) process based on previous lab-scale study. Experimental results showed that when the concentrations of COD and NH4 -N of the influent were 370~910 mg/L and 10~70 mg/L, the corresponding average concentrations of those of effluent were about 80 mg/L and 8 mg/L respectively, which was better than the Level I criteria of the Integrated Wastewater Discharge Standard (GB8978-1996). According to GC-MS analysis of the effluents from both the wastewater treatment plant (WWTP) and the pilot system, there were 68 kinds of persistent organic pollutants in the WWTP effluent, while there were only 32 in that of the pilot system. In addition, the amount of the organics in the effluent of the pilot system reduced by almost 50% compared to that of the WWTP. As a whole, after bioaugmentation, the organic removal efficiency of the wastewater treatment system obviously in- creased.     

洗刷废水改性膨润土--一种有效的废水处理剂

Trimeric quaternary ammonium surfactants are newly developed surfactants, their widespread synthesis and utilization results in a great amount of scouring wasterwater of high COD, which is unmanageable. The present investigation aims to find a new type of organo-bentonites modified by the scouring wastewater and to treat the scouring wastewater at the same time. Results of adsorption experiments of phenol and formaldehyde by the modified bentonite show that, at the optimal ratio 24 % (W/V) of modified bentonite to scouring wastewater, the removal rate of phenol and formaldehyde by FTAT scouring wastewater modified bentonite is 3.53 times and 2.48 times higher than that of Na-bentonite, and the COD of treated scouring wastewater reduces to below 200 mg/L, meeting the second level of Standards for Discharge of Water Pollutants from the Ammonia Industry of China.     

实验室废水处理研究进展

该文介绍了实验室存在的危害，总结了其思想和管理等源头处理方式以及实验药品的回收、预处理和综合处理等处理方法，对实验室废水处理的技术进行了展望，实现了实验室药品回收取得经济性，又避免实验室废水排入河流中造成环境污染。     

除砷技术研究现状

介绍含砷废水对人类的危害，阐述除砷材料和含砷废水的处理方法的发展情况，以及各种除砷技术的优缺点．总结出在各种除砷方法中生物除砷将是最有发展前景的方法。     

Development of an evaporation crystallizer for desalination of alkaline organic wastewater before incineration

A wastewater evaporation-desalination pretreatment method was introduced to remove the Na^＋ and K^＋ salts in volatile organic compounds （VOCs） wastewater before it was fed into the incinerator. VOCs in the wastewater were volatilized in the evaporation system and then the vapor was combusted in an incinerator. Simulated phenol wastewater containing sodium chloride was evaporated and concentrated and sodium chloride was crystallized in different parameters. The experimental results showed that the higher initial concentration of sodium chloride increases the ratio of volatilization of VOCs, which was due to the effect of “salting out” （a decrease in the solubility of the nonelectrolyte in the solution, or more rigorously, an increase in its activity coefficient, caused by the salt addition （Furter and Cook, 1967））. When evaporation speed was increased from 1.67 ml/min to 2.73 ml/min, the total removal coefficient of sodium chloride was about 99.88%-99.99%. This pretreatment procedure eliminates the slag phenomenon caused by Na^＋ and K^＋ salts during wastewater incineration, so the incinerator could operate continuously, and the wastewater evaporation could increase the heat value of wastewater, and the operation cost would be reduced.     

金华城市污水SBR处理工艺

应用序批式活性污泥法(SBR工艺)处理中、小规模城市生活污水，确定了主反应池运行周期以及运行技术参数；全程采用PLC自动控制，不设调节池，投资省，具有耐冲击负荷、运行费用低、效果好等特点；COD去除率这85％以上，BOD5、氨氮去除率这80％以上，处理后出水达到地表水Ⅳ类标准，是比较理想的城市污水处理方法。     

CTP生产废水的物化特性及处理工艺

本文介绍了N—环己基硫代邻苯二甲酰亚胺(CTP)生产过程中废水的物理化学特性，并提出了对各股废水分别预处理，然后对全厂废水进行厌氧／好氧综合处理的工艺。结果表明，该工艺处理CTP废水是成功的，处理后的废水达到GB8978—19N《污水综合排放标准》中的二级标准。     

利用硫化亚铁代用品治理含铬废水的中试实验

采用硫化亚铁代用品治理某厂含铬废水,并与硫酸亚铁法和亚硫酸钠法进行了比较．     

Performances of lateral flow biological aerated filter in treating domestic wastewater

1 Introduction ? The biological aerated filter technique has developed rapidly since 1980s, and is widely used in municipal sewage treatment. It has been used in the primary and secondary treatment processes due to its desirable economical efficiency and …     

生物接触氧化工艺在印染废水治理中的应用

通过对某一针织印染厂生产废水处理工艺存在的问题进行研究和分析,对其废水处理工艺进行了改进,针对废水水质特点,采用“缺氧酸化＋生物接触氧化”相结合的工艺路线进行治理。运行结果表明,经该工艺处理后,废水中的COD、BOD,等指标均能达标排放,有利于企业的可持续发展。