紫外吸收光度法测定工业污水中石油烃类的方法改进

本文对工业污水中,石油烃类分析的紫外吸收光度法,进行了删繁就简的试验。实验表明,石油烃萃取溶剂石油醚的透光率T,可以在很大范围内应用,可以简化或省略脱芳净化。脱水剂硫酸钠用量必须适当,否则会产生负偏差。分析中,标准油样可用具有代表性的单一油品代替。     

工业废水治理技术及其进展

本文根据近年来国内外有关工业废水治理技术的发展情况,对这些治理技术的特点及进展作了一个综合介绍,并对其应用前景给以了一定的评述和比较。     

适于中小城镇污水处理工艺的流程研究

本文针对中小城镇污水的特点 ,通过不同工艺的比较 ,提出了适合中小城镇污水处理的工艺流程。此工艺具有占地少、投资小、处理效率高 ,易实现集成化和自动化的特点。     

Characteristics of dynamic membrane filtration: structure,operation mechanisms,and cost analysis

Dynamic membrane technology represents a promising substitution for conventional membrane bioreactor system,which owns the merits of flexible and comparably cheap materials,easy for backwash,good antifouling property,etc.It has been over half a century since the principle of dynamic membranes was first reported,whereas the development and popularization are still limited.This paper makes a review on characteristics of dynamic membranes,including development and application,mechanism,structure and materials,operation conditions,membrane fouling,dynamic membrane cleaning,and cost analysis,attempting to give clues on promotions and perspectives exhibited of this technology.     

两种沸石吸附废水中磷污染物的研究

采用人造沸石和4A沸石对含磷50 mg·L-1模拟废水进行吸附实验,研究了沸石用量、含磷浓度、吸附时间、反应温度和pH值对两种沸石吸附性能的影响.结果表明,室温,pH=2～3,P2.5 mg/g(沸石),吸附100 min的条件下,两种沸石对磷的去除率均在90%以上,4A沸石对磷的吸附效果优于人造沸石.     

膜分离技术处理钼酸铵废水的研究

钼是稀有金属。生产钼酸铵的废水直接排放不仅造成大量钼资源的流失,而且还严重污染环境。膜分离技术处理钼酸铵废水具有分离效果好、占地小、操作简单、安全环保等优点。通过对在相同压力下钼酸铵溶液经陶瓷膜分离和荷负电膜分离时通量的变化,说明钼酸铵溶液经陶瓷膜和荷负电膜串联分离情况下,陶瓷膜通量比单用大些,荷负电膜变化不明显,但这一情况是在料液已被陶瓷膜分离过一次的基础上进行的,所以串联分离效果比单独使用好。这些研究对改进钼酸铵废水处理生产工艺、降低生产成本具有积极的意义。     

Modified natural zeolite as heterogeneous Fenton catalyst in treatment of recalcitrants in industrial effluent

Industrial effluents with high recalcitrants should undergo post-treatment after biological treatment. The aim of this study was to use cheap and abundantly available natural materials to develop heterogeneous Fenton catalysts for the removal of colored recalcitrants in molasses distillery wastewater(MDW). The pellets of zeolite,which is naturally available in many countries, were modified by pre-treatment with sulphuric acid, nitric acid and hydrochloric acid, before embedding on them the ferrous ions. The effects of p H and temperature on heterogeneous Fenton were studied using the modified catalysts. The sulphuric acid-ferrous modified catalysts showed the highest affectivity which achieved 90% color and 60% TOC(total organic carbon) removal at 150 g/L pellet catalyst dosage, 2 g/L H_2O_2 and 25 °C. The heterogeneous Fenton with the same catalyst caused improvement in the biodegradability of anaerobic effluent from 0.07 to 0.55. The catalyst was also applied to pre-treat the raw MDW and increased it's biodegradability by 4%. The color of the resultant anaerobic effluent was also reduced. The kinetics of total TOC removal was found to depend on operation temperature. It was best described by simultaneous first and second order kinetics model for the initial reaction and second order model for the rest of the reaction.     

基于工业以太网的污水处理控制系统

通过工业以太网,使得每个污水处理环节中的数据,可以在其相关联的控制器中得到实时的更新,同时污水处理厂的管理人员也可以在办公室通过工业以太网,得到现场的实时数据和视频监控图像。工业以太网利用其具有冗余性、高可靠性、实时性的特点,为污水处理厂的实时数据传输提供了保障。通过工业以太网技术,实现了污水处理厂的信息化。     

利用人工湿地减少排入水体的污水量

人工湿地可有效地处理污水,是一种投资少、能耗低、适用范围广、效果好、易于掌握和管理的生态处理系统。根据郑州市西流湖的实际情况,提出利用人工湿地减少排入湖泊中的污水量,并因地制宜地对人工湿地进行了初步设计。     

浅析DDNP废水处理几种方法

DDNP废水的治理是一大难题．文中归纳整理出现有处理DDNP废水的方法,并在此基础上对其优缺点进行了讨论旨在对其做进一步的研究．以找到一种治理效果好、成本低廉的可靠方法。