共查询到20条相似文献,搜索用时 78 毫秒
1.
养猪废水处理技术研究进展 总被引:2,自引:0,他引:2
养猪废水是一种高浓度有机废水,直接排入或随雨水冲刷进入江河湖库会引起水体富营养化,破坏生态环境。因此,必须对养猪废水进行有效处理。文章分析了物理处理法、化学处理法、生物处理法、自然处理法和组合工艺处理法处理养猪废水。结合养猪废水处理技术的研究进展,对养猪废水处理技术的发展进行了展望。 相似文献
2.
3.
印染废水处理技术研究进展 总被引:1,自引:0,他引:1
印染废水具有水量大、有机污染物含量高、成份复杂、色度高、碱性大、水质变化大等特点,是难处理的工业废水之一。印染废水的处理方法有物理处理法、化学处理法和生物处理法。文章对印染废水的各种处理方法,从原理、特点及研究进展等方面分别进行了概述,并指出今后印染废水处理技术的优化组合会成为印染废水处理技术的研究重点。 相似文献
4.
5.
6.
7.
高浓度氨氮废水处理技术及研究进展 总被引:2,自引:0,他引:2
高浓度氨氮废水来源广泛,成分复杂,水质差异性大,难以处理,一直是环境领域研究的重难点。本文综述了近些年来国内外氨氮废水处理技术及其特点,并对未来氨氮处理技术发展提出展望。 相似文献
8.
9.
主要对当前化学实验室废水处理技术进行分析。在对化学实验室污水的具体性质进行分析之后,对有效处理方法进行介绍,目的就是为了保证所排出的污水符合国家相关标准,以避免废水对环境的再次污染。 相似文献
10.
近年来,随着我国经济社会的不断发展,化工方面的发展也呈现出了突飞猛进的效果,化工企业的规模以及数量也越来越多,随之而来增加的不只有经济效益,工业废水的排放也在随之增多,并且大多数工厂的废水排放都存在着超标的情况,对于环境造成了严重的污染。随着当前对于环境的保护力度的逐渐加大,对于工业废水的处理方式也在不断的进步。主要针对于当前综合化工废水的来源和特点进行分析,并且对于化工废水处理技术的研究进展进行不断深入探讨。 相似文献
11.
分析了不饱和聚酯树脂(UP)的固化机理和DNT(二硝基甲苯)对不饱和聚酯树脂的阻聚机理,设计了包覆方式,研制出DT-1和DT-2两种底涂液,并将其应用于含DNT双基推进剂的不饱和聚酯包覆。结果表明,DT-1底涂液阻隔性好,但与不饱和聚酯包覆剂的黏结性较差;DT-2底涂液与不饱和聚酯包覆剂具有很好的黏结性,但阻隔性能不好。在两种底涂液联合使用,烘干时间为180min,凝胶时间大于110min条件下,可包覆出黏结可靠的装药。对包覆的含DNT双基推进剂进行环剪切黏结性能试验,测试结果表明,在6.83MPa时黏结强度趋于稳定,破坏发生在非黏结面,可满足装药黏结要求。 相似文献
12.
13.
设计了针对二硝基甲苯催化氢化反应的控制系统,采用计算机控制,实现反应器的温度、压力及流量等参数控制。催化剂与DNT采用比值控制,保证反应过程的工艺条件、提高其转化率,确保整个工艺过程安全可靠运行。 相似文献
14.
Autoclave methods are commonly used when pressure progress under thermal stress is of interest. One of them is the mini‐autoclave method by Kühner AG. To test the robustness of the equipment under powerful exposure, two known high energetic materials, DNT and TNT, were investigated. The sample mass was increased stepwise in the range from 0.25 g to 1.0 g. For one test (1 g TNT), gas burners instead of the usually employed 2‐zone heating block, were used to intensify the test conditions. Results showed the expected slower pressure generation of DNT in comparison to TNT. The mechanical robustness of the apparatus could be approved in all runs. Pressure data were used to calculate the energy release of decomposition. The values were in good agreement with the heat of decomposition, estimated by DSC. 相似文献
15.
16.
以丙酮为溶剂,通过蒸发结晶法制得六硝基六氮杂异伍兹烷(CL-20)/二硝基甲苯(DNT)共晶炸药。利用扫描电镜(SEM)、X射线衍射(XRD)和热重/差示量热法(TGA/DSC)研究了共晶炸药的形貌、结构和热分解特性,测试了CL-20/DNT共晶炸药的机械感度和5s爆发点温度,并计算了其爆轰性能。结果表明,共晶炸药的微观形貌不同于原料CL-20,呈条状晶体;衍射峰明显不同于CL-20/DNT物理混合物的衍射峰,表明有新物相生成。在DSC曲线上,CL-20/DNT共晶几乎没有DNT的熔化吸热峰,而CL-20/DNT物理混合物中有明显的熔化峰,且二者的放热峰峰形和峰位不同;与原料CL-20相比,共晶炸药的分解峰温提前了21℃,放热量(ΔH)和最大热流量(Qmax)分别增加了39%和104%。与CL-20/DNT物理混合物相比,共晶炸药的5s爆发点温度和表观活化能分别增加3.9℃和65.7kJ/mol,撞击感度降低88.9%,摩擦感度降低40%,说明共晶炸药热稳定性增强。CL-20/DNT共晶炸药的理论爆速达到8 340m/s。 相似文献
17.
18.
采用废水混合-混凝沉降-生物接触氧化法处理农药唑蚜威生产废水,效果较好。生产排放的三种废水混合后产生絮状沉淀,除去沉淀物后,废水COD为20760豪克/升,色度为250倍。混合废水经混凝沉降预处理COD降至7515毫克/升,色度降为150倍。预处理后废水再经挂膜生物接触氧化法进行二级处理,出水COD〈150毫克/升,色度〈80倍。 相似文献
19.
20.
Daniel Cassidy Abraham Northup Duane Hampton 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2009,84(6):820-826
BACKGROUND: Recent studies indicate that chemical oxidation may be compatible with subsequent biodegradation in contaminated soils. To test this, soil contaminated with 2,4‐dinintrotoluene (2,4‐DNT) was treated in batch slurry reactors with (1) ozone, (2) modified Fenton chemistry (MFC), and (3) iron‐activated sodium persulfate (SPS). Chemical and subsequent biological oxidation were monitored, and compared with biodegradation alone. Release of nitrite and nitrate distinguished biological from chemical oxidation of 2,4‐DNT, respectively. DNT‐degrading microorganisms were enumerated. The disappearance of volatile fatty acids (VFAs) accumulated during chemical oxidation was also monitored. RESULTS: In the biological reactor 66% of the 2,4‐DNT was degraded, but further biodegradation was inhibited by nitrite concentrations approaching 18 mmol L?1. At the doses tested, all oxidants achieved chemical oxidation followed by biodegradation, resulting in 98% DNT removal overall. Ozone achieved the greatest DNT removal (70%), but also caused the greatest reduction in DNT degraders and the longest rebound time (60 days) before biodegradation of the remaining DNT and VFAs. SPS resulted in the least DNT removal by chemical oxidation (37%), but showed no obvious rebound period for DNT degraders, and even signs of co‐existing chemical and biological oxidation. By releasing nitrate, which is less toxic than nitrite, the oxidants kept nitrite levels below 18 mmol L?1, enabling the follow‐on biodegradation step to attain lower concentrations of 2,4‐DNT than biodegradation alone. CONCLUSIONS: All three chemical oxidants were compatible with biodegradation of residual 2,4‐DNT. Post‐oxidation bioremediation should be included in remedial designs. Copyright © 2009 Society of Chemical Industry 相似文献