煤制乙二醇废水预处理装置的工业化调试

针对煤制乙二醇废水含高浓度硝酸盐氮的特点,设计了缺氧膨胀床(AEB)反应器预处理装置,并进行了工业化启动和调试运行,考察了其在反硝化连续流运行条件下的处理效果及工艺参数变化。结果表明,AEB反应器启动后,填料层生物膜挂膜快速且生长稳定。反应器在工业化调试阶段运行稳定,COD和TN的去除率和去除负荷较为稳定。在受到来水冲击后,AEB反应器处理效果稳定,出水可在短期内恢复正常。该技术的系统操控参数范围较广,易于工业化操控运行,在煤制乙二醇废水和其他含高浓度硝酸盐氮废水的处理中具有较大的推广价值。     

膜生物反应器处理乙二醇乙醚有机废气

针对水性涂料使用过程产生的乙二醇乙醚有机废气,通过膜生物反应器进行处理,考察了进气浓度、停留时间、液体喷淋量以及循环液pH对净化性能的影响;研究了膜生物反应器降解乙二醇乙醚废气动力学;采用16S rRNA、宏基因组测序技术对微生物群落结构及功能基因进行了分析。结果表明,适宜的运行条件为停留时间10 s,循环液pH 7.60,喷淋密度1.2 m~3·(m~2·h)~(-1);生化降解乙二醇乙醚的最大反应速率为666.67 g·(m~3·h)~(-1);经过2次进气负荷的提高,反应器中的优势菌属发生变化,由30 d的Methyloversatilis、90 d的Methyloversatilis、Pseudomonas变为145 d的Thauera和Flavobacterium。膜生物反应器能够高效降解乙二醇乙醚有机废气,去除率可达99.6%,本研究为处理水性涂料产生的醇醚类有机废气提供了参考。     

Compositions and sources of organic acids in fine particles (PM2.5) over the Pearl River Delta region, south China

Organic acids as important constituents of organic aerosols not only influence the aerosols' hygroscopic property, but also enhance the formation of new particles and secondary organic aerosols. This study reported organic acids including C14–C32fatty acids, C4–C9dicarboxylic acids and aromatic acids in PM2.5collected during winter 2009 at six typical urban, suburban and rural sites in the Pearl River Delta region. Averaged concentrations of C14–C32fatty acids, aromatic acids and C4– C9 dicarboxylic acids were 157, 72.5 and 50.7 ng/m3, respectively. They totally accounted for 1.7% of measured organic carbon. C20–C32fatty acids mainly deriving from higher plant wax showed the highest concentration at the upwind rural site with more vegetation around, while C14–C18fatty acids were more abundant at urban and suburban sites, and dicarboxylic acids and aromatic acids except 1,4-phthalic acid peaked at the downwind rural site. Succinic and azelaic acid were the most abundant among C4–C9dicarboxylic acids, and 1,2-phthalic and 1,4-phthalic acid were dominant aromatic acids. Dicarboxylic acids and aromatic acids exhibited significant mutual correlations except for 1,4-phthalic acid, which was probably primarily emitted from combustion of solid wastes containing polyethylene terephthalate plastics. Spatial patterns and correlations with typical source tracers suggested that C14–C32fatty acids were mainly primary while dicarboxylic and aromatic acids were largely secondary. Principal component analysis resolved six sources including biomass burning, natural higher plant wax, two mixed anthropogenic and two secondary sources; further multiple linear regression revealed their contributions to individual organic acids. It turned out that more than 70% of C14–C18fatty acids were attributed to anthropogenic sources, about 50%–85% of the C20–C32fatty acids were attributed to natural sources, 80%–95% of dicarboxylic acids and 1,2-phthalic acid were secondary in contrast with that 81% of 1,4-phthalic acid was primary.     

吉林石化乙二醇厂:连续11年实现安全生产无事故

1月5日在吉林石化公司安全表彰会上了解到,吉林石化乙二醇厂连续11年创成安全生产无事故工厂,这对于一个甲级防爆企业来说,取得这样的成绩实属不易。据该厂安全环保科副科长关进介绍,这个厂上下牢固树立"抓安全环保从基层入手"的理念,严格     

某环氧乙烷精制塔爆炸事故HAZOP分析

针对某烯烃厂乙二醇装置环氧乙烷精制塔的爆炸事故,采用HAZOP分析方法对该乙二醇装置进行定性工艺危害分析,辨识该装置存在的安全隐患。针对爆炸的环氧乙烷精制塔,结合事故爆炸后果,利用HAZOP分析理念,分析环氧乙烷精制塔爆炸原因,最终提出相应的整改建议。     

乙二醇装置催化剂延期运行及安全控制措施

对乙二醇装置SD400-9催化剂延期运行进行了必要性和可行性分析,提出了延期运行要采取的有效控制措施,确保了装置的安全稳定运行,取得了可观的效益,同时减少了危废品的产生,减少了资源浪费和环境污染。     

吸附-电氧化法降解气态乙二醇乙醚乙酸酯(EGEA)的研究

采用吸附-电氧化两步联动降解VOCs,结果表明,相同电压下以铁作为阳极时的CODCr脱除率达到80%以上,比用不锈钢阳极时高40%左右.电解质溶液的pH值和CODCr值随时间有规律地变化,也验证了反应器中所发生的反应.     

矿泉水瓶反复使用可致癌

一般矿泉水瓶用PET(聚对苯二甲酸乙二醇酯)塑料制成,含有潜在致癌物乙基己基胺,瓶子用一次是安全的,如果重复使用,就有致癌危险.每个矿泉水瓶底部都有一个带箭头的三角形标志,里面的数字愈大愈安全,假若数字≥5,就可以循环再用;小于5甚至没有数字的,请勿再利用或加热使用.一般矿泉水瓶子底部标志为1,因此不能放在汽车内晒太阳.     

矿泉水瓶不宜重复用

一般矿泉水瓶用PET（聚对苯二甲酸乙二醇酯）塑料制成，含有潜在致癌物乙基己基胺。用一次是安全的，如重复使用，就有致癌危险。     

聚对苯二甲酸乙二醇酯废料的回收方法

介绍了聚对苯二甲酸乙二醇酯传统的化学回收方法：甲醇醇解法、水解法和醣酵解法；简述了聚酯新的回收工艺：伊斯曼乙二醇水解工艺、超临界水水解工艺和Reco-PET工艺，及有关国家聚酯回收的工业化实践，并对聚酯回收的前景及影响聚酯回收的因素进行了分析。