预处理-气浮-氧化沟工艺处理再生纸废水

介绍了预处理-气浮-氧化沟工艺在再生纸废水处理工程中的应用。运行结果表明:该工艺处理效果稳定,耐冲击负荷能力强,进水ρ(COD)、ρ(BOD5)、ρ(SS)分别为1542,654,2254mg/L时,出水分别为77,38,22mg/L,系统出水水质达GB3544-2001《造纸工业水污染物排放标准》。     

烟气脱硫设施运行及脱硫电价实时监控系统设计

由于缺乏有效监管手段,目前脱硫设施实际投运情况不理想。设计了一套B/S架构的烟气脱硫设施运行及脱硫电价实时监控系统,分为数据采集、数据通讯、数据处理及发布3个子系统。选择能全面反映脱硫设施运行状况的28个信号,采用"共享-分流"信号防伪采集技术进行采集,通过电力系统内载波电话拨号与无线GPRS两种通讯方式相互竞争、互为备用来实现可靠通讯,并经过软件防伪判别模块和统计运算后以WEB形式发布。数据以5m in的间隔实时刷新,且每小时更新脱硫投入率、脱硫电价款等报表数据。     

宜兴市清源污水处理厂升级改造工艺设计

宜兴市清源污水处理厂升级改造工程设计规模5×104m3/d,采用强化生物脱氮、机械微过滤(盘片过滤)工艺,利用现有池容进行内部改造,同时增加深度处理设施,提高出水标准,改造后出水ρ(COD)、ρ(BOD5)、ρ(SS)、ρ(NH3-N)、ρ(TN)和ρ(TP)平均值分别为34,6,5,1.3,10.3和0.36mg/L,各项水质指标均达GB18918-2002《城镇污水处理厂污染物排放标准》一级A标准。     

Bioreduction of nitrate in groundwater using a pilot-scale hydrogen-based membrane biofilm reactor

A long-term pilot-scale H₂-based membrane biofilm reactor (MBfR) was tested for removal of nitrate from actual groundwater. A key feature of this second-generation pilot MBfR is that it employed lower cost polyester hollow fibers and still achieved high loading rate. The steady-state maximum nitrate surface loading at which the effluent nitrate and nitrite concentrations were below the Maximum Contaminant Level (MCL) was at least 5.9 g·N·(m²·d)^?1, which corresponds to a maximum volumetric loading of at least 7.7 kg·N·(m³·d) ^?1. The steady-state maximum nitrate surface area loading was higher than the highest nitrate surface loading reported in the first-generation MBfRs using composite fibers (2.6 g·N·(m²·d)^?1). This work also evaluated the H₂-utilization efficiency in MBfR. The measured H₂ supply rate was only slightly higher than the stoichiometric H₂-utilization rate. Thus, H₂ utilization was controlled by diffusion and was close to 100% efficiency, as long as biofilm accumulated on the polyester-fiber surface and the fibers had no leaks.     

油气钻井作业对地下水污染治理研究＊

分析了钻井作业对地下水污染的特点、污染途径,针对性地提出了钻井作业对地下水污染的预防措施,以及污染物处理技术,其中氧化还原技术、气体抽取技术、环境生物技术主要用于有机物污染治理,SRB技术、废弃钻井液固化技术、钻井液转换为水泥浆(MTC)的固井技术可用于处理废弃钻井液。钻井引起的污染治理应以"预防为主,防治结合",切实推行清洁生产和HSE管理。     

Enhanced NOx removal from flue gas by an integrated process of chemical absorption coupled with two-stage biological reduction using immobilized microorganisms

An integrated process of metal chelate absorption coupled with two stage bio-reduction using immobilized cultures has been proposed to continuously removal of NO_x, and the effects of SO₂, NO and O₂ concentration, gas/liquid flow rate on NO_x removal efficiency were investigated. Although nitrogen-containing components, such as Fe(II)EDTA-NO, NO₂^? and NO₃^? in the scrubbing solution, inhibited the bio-reduction of Fe(III)EDTA obviously, it was feasible to abate the inhibition effect by using the two stage bio-reduction system, and thus to improve NO_x removal efficiency. The removal efficiency decreased slowly with the increase of SO₂, O₂, NO concentration and gas flow rate, and increased with the increase of liquid flow rate. Continuously operating for 18 days, a high removal efficiency around 95% was reached by using the two-stage bio-reduction system with immobilized microorganisms, while the value decreased to 85% after 5 days of operation by using the suspended microorganisms, at a constant gas flow rate of 60 L/h containing 424–450 mg/m³ NO, 2428–2532 mg/m³ SO₂ and 3% O₂.     

典型进口废物循环利用技术园区投资建设模式研究

随着社会经济的快速发展、资源及原材料需求量的不断增加,以进口废物为原料进行加工利用的循环经济园区也随之蓬勃发展。循环经济产业园区建设过程中有投资巨大、资本回收周期长、投资主体众多的特点。在考虑经济效益的同时,也要统筹考虑社会效益和环境效益,因此选择何种投资建设模式来指导园区建设具有十分重大的意义。本文通过对国内三省的四个园区投资建设模式的调查研究,分析对比了不同投资建设模式的典型特征,总结概括了不同模式之间的优缺点,为同类园区的开发建设提供了有益参考。     

解读《温室气体自愿减排交易管理暂行办法》

本文对发改委颁布的（《温室气体自愿减排交易管理暂行办法》进行了解读、分析其特点并指出尚需进一步解决的问题。     

美国页岩气开采的水环境监管经验研究

页岩气开采所使用的核心技术——水力压裂技术不仅消耗大量水资源,而且向地下注入裂解液可能污染地下水。为应对页岩气开发所带来的环境问题,美国已开展并积累了相对丰富的环境监管经验和技术。文章就美国页岩气开采场地的水环境监管体系、法规、制度及技术等进行探讨和研究,并提出我国在页岩气大规模开采初期的水环境监管思路及技术方向。     

废钻井液固化剂的筛选实验

针对目前许多废钻井液固化剂产品达不到降低污染物浓度的要求,而效果较好的产品价格昂贵,处理成本高,难以推广使用的问题,选取了9种固化剂进行固化实验,通过针入度测定仪、固化效果比对,参考相应市场价格,筛选出经济效益较高的固化剂,为同行业开展固化处理提供参考和借鉴。