海藻胶渣在处理高浓度含Zn^2＋废水中的试验研究

利用海藻胶渣吸附法处理高浓度含Zn^2＋废水,试验考察了海藻胶渣用量、反应pH、震荡时间和温度对吸附效果的影响,探讨了吸附作用机理。试验结果表明,海藻胶渣对Zn^2＋有良好的吸附性能,反应的pH、温度和海藻胶渣用量是影响吸附效果的主要因素,在pH7-9,温度30～40℃,用量4％～5％条件下,5～10min内吸附率可达99％以上。     

浅议攀钢翻渣场污染物无害化治理措施

针对攀钢在钢铁生产过程中产生的大量冶炼废弃物,主要是固、液、粉尘三类污染物,分别采用挡渣坝、挡水坝和喷洒降尘进行了处理,从而降低了污染物的扩散,实现了无害化的治理。     

Integration of biological method and membrane technology in treating palm oil mill e uent

Palm oil industry is the most important agro-industry in Malaysia, but its by-product–palm oil mill e uent (POME), posed a great threat to water environment. In the past decades, several treatment and disposal methods have been proposed and investigated to solve this problem. A two-stage pilot-scale plant was designed and constructed for POME treatment. Anaerobic digestion and aerobic biodegradation constituted the first biological stage, while ultrafiltration (UF) and reverse osmosis (RO) membrane units were combined as the second membrane separation stage. In the anaerobic expanded granular sludge bed (EGSB) reactor, about 43% organic matter in POME was converted into biogas, and COD reduction e ciency reached 93% and 22% in EGSB and the following aerobic reactor, respectively.With the treatment in the first biological stage, suspended solids and oil also decreased to a low degree. All these alleviated the membrane fouling and prolonged the membrane life. In the membrane process unit, almost all the suspended solids were captured by UF membranes, while RO membrane excluded most of the dissolved solids or inorganic salts from RO permeate. After the whole treatment processes, organic matter in POME expressed by BOD and COD was removed almost thoroughly. Suspended solids and color were not detectable in RO permeate any more, and mineral elements only existed in trace amount (except for K and Na). The high-quality e uent was crystal clear and could be used as the boiler feed water.     

红霉素发酵菌湿渣烧制氧化锌烧渣研究

红霉素发酵菌湿渣中约含2．5％的锌,经直接烘干后灼烧实验表明,可获得ZnO含量高达87．15％的氧化锌烧渣。烧渣中铅铜镉铁含量远低于同位品的锌焙砂,是生产高纯氧化锌的最佳原料,有较高的经济价值。     

台湾研究用茶渣处理废水

茶叶渣除了除臭、当肥料,现在还可以用来处理废水。近日,中国台湾义守大学土木与生态工程系教授翁志煌发现,茶叶渣可有效吸附污水中的六价铬等重金属,是既廉价又有效的生质吸附剂。翁志煌在实验中发现,台湾随处可见的“茶叶渣”是非常好的吸附剂。他使用压力锅和去离子水反复蒸洗茶叶,去除茶叶中的有机酸,再烘干磨粉,即可处理废水。     

铬渣渗滤液处理方法及应用现状

铬渣产量大、毒性剧烈,是严重污染环境和危害人类健康的危险废物。铬渣的环境污染问题已经引起了国家的高度重视,要求2010年底前,所有历史堆存铬渣实现无害化处理。铬渣堆放所产生的含铬渗滤波已对周围的土壤、地下水乃至居民身体健康造成危害。因此,在铬渣得到治理的同时,含铬渗滤液必须得到有效治理。系统评述了铬渣渗滤液的各种治理技术和应用现状,并展望了含铬废水处理技术的发展前景。     

电石渣热电厂烟气脱硫的实用初探

国内外电厂脱硫成熟技术很多,但对国内热电厂而言,都存在着投资大、运行成本高等问题。本文探索开发了高效电石渣脱硫工艺。实践证明,改用电石渣作为脱硫再生荆,既能适合企业自身特点,达到投资省、运行成本低,脱硫效率高的目标。同时又解决了乙炔气厂电石渣的处置难题。是资源性环境保护的成功尝试,是以废治废的具体体现。     

膨化法制备固体聚合硫酸铁技术

以硫铁矿烧渣为原料,采用膨化技术制备得到固体聚合硫酸铁(SPFS).结果表明,在硫铁矿烧渣酸浸液中加入适量绿矾后进行加热,蒸发浓缩,当水分蒸发率为30.75%,反应温度为60℃,加入膨化剂氯酸钠,反应之后于60℃干燥12h即可得到SPFS.添加脱水明矾,干燥时间缩短为3h;;添加SPFS粉末,干燥时间缩短为4h.表面扫描电镜(SEM)实验结果表明,膨化法所得到的SPFS为片状、疏松体,加入脱水明矾和SPFS粉末,其SPFS片状体增大.XRD实验表明,SPFS化学式为Fe4.67(SO4)6(OH)·220H2O,加入添加剂脱水明矾和SPFS粉末,所得SPFS结构不变.与传统制备SPFS方法相比,膨化法制备SPFS具有干燥时间短、能耗低、设备简单、生产成本低等优点.     

中水回用循环冷却水高浓缩倍率技术特点和运行经验

本文结合华润沧州热电厂中水经石灰深度处理系统特点．不加混凝剂。消石灰反应后副产品泥渣直接供给脱硫系统替代了石灰粉,国内首创。优化较好防垢、防腐蚀和杀菌粘泥剥离的产品技术方案．确保循环水3～5倍高浓缩倍率安全运行．实现了零排放成功案例。