两种培养基对饮水机出水中细菌总数的测定效果比较

采用营养琼脂培养基和R2A Agar培养基对上海某高校及其附属小学公用饮水机出水细菌总数变化规律进行了测试分析比较。结果表明,在洁净饮用水受微生物微污染情况下,R2A Agar培养基更适合这种贫营养环境中的微生物的培养,比营养琼脂培养基具有更好的灵敏度。     

从含金废料中回收金与金的提纯

本文介绍了从几种含金废料中回收金的具体方法，将回收得到的金再用化学方法提纯为９９．９９％的高纯度的黄金，该法工艺简单、成本低、经济效益显著。     

Production of laccase by Coriolus versicolor and its application in decolorization of dyestuffs: (Ⅱ) Decolorization of dyes by laccase containing fermentation broth with or without self-immobilized mycelia

The capability of decolorization for commercial dyes by Coriolus versicolur fermentation broth containing laccase with or without immobilized mycelium was evaluated.With cell-free fermentation broth containing laccase,high decolorization ratio was achieved for acid orange 7,but not for the other dyes concerned.The immobilized mycelium was proved to be more efficient than the cell-free system.All the four dyestuffs studied were found being decolourized with certain extent by immobilized mycelium.The repeated-batch decolorization was carried out with satisfactory results.The experimental data showed that the continuous decolorization of wastewater from a printing and dyeing industry was possible by using self-immobilized C.Versicolor.     

土工织物在废料填埋场污染防治中的应用

近年来应用土工合成材料作为填埋场的防渗反滤系统材料逐渐增多。土工合成材料化学性能稳定，可取代传统的砂石、粘土用作反滤、防渗层，具有造价低、施工简便等优点。1填埋场污染防治系统的组成填埋场底部和侧边须布置防渗系统以防止废物中有害物质进入地基影响地下水和周围环境，并将填埋场内的沥滤液收集导入污水处理装置中进行无害化处理；顶部布置防渗系统以减少雨水浸润而减少沥滤液的产生和扩散。近年来大型现代化填埋场中的顶部防渗系统还可收集利用垃圾发酵过程中产生的气体。填埋场防渗反滤系统一般由以下几部分组成：填埋场底部…     

电路板生产中废边料的处置方法

电路板生产中废边料的处置方法山东省招远市环保局刘青海深圳市宝安区环保服务公司邓恩忠随着电子工业迅猛发展，电路板厂如雨后春笋般崛起，仅深圳周围就超过百家，由于环境污染问题，这类工厂在特区一些地方由限建到禁建，逐渐由沿海地区向内陆延伸，山东招远最近新建的...