上海报废信息卡回收及资源化利用探讨

信息产业不断发展,促使各类信息卡不断涌现,相关报废信息卡的回收和资源化利用已成为资源综合利用的重要课题。围绕上海市废旧信息卡的产生量与回收情况,就报废信息卡回收可借鉴的经验与资源利用技术问题进行了探讨。为其他地区开展相关工作提供参考。     

Evaluation of recycling the effluent of hydrogen fermentation for biobutanol production: Kinetic study with butyrate and sucrose concentrations

Butyrate in the effluent of hydrogen-producing bioreactor is a potential feed for biobutanol production. For recycling butyrate, this study investigated the kinetics of biobutanol production by Clostridium beijerinckii NRRL B592 from different paired concentrations of butyrate and sucrose in a series of batch reactors. Results show that the lag time of butanol production increased with higher concentration of either sucrose or butyrate. In regression analyses, the maximum specific butanol production potential of 6.49 g g⁻¹ of dry cell was projected for 31.9 g L⁻¹ sucrose and 1.3 g L⁻¹ butyrate, and the maximum specific butanol production rate of 0.87 g d⁻¹ g⁻¹ of dry cell was predicted for 25.0 g L⁻¹ sucrose and 2.6 g L⁻¹ butyrate. The specific butanol production potential will decrease if more butyrate is added to the reactor. However, both sucrose and butyrate concentrations are weighted equally on the specific butanol production rate. This observation also is true on butanol yield. The maximum butanol yield of 0.49 mol mol⁻¹ was projected for 25.0 g L⁻¹ sucrose and 2.3 g L⁻¹ butyrate. In addition, a confirmation study found butanol yield increased from 0.2 to 0.3 mol mol⁻¹ when butyrate addition increased from 0 to 1 g L⁻¹ under low sugar concentration (3.8 g L⁻¹ sucrose). The existence of butyrate increases the activity of biobutanol production and reduces the fermentable sugar concentration needed for acetone–butanol–ethanol fermentation.     

住宅小区雨水资源化与中水回用模式与技术

住宅小区雨水资源化利用与中水回用是建设节水型城市,实现水资源可持续利用的重要组成部分．住宅小区的雨水资源化利用技术将雨水收集、雨水分散处理、雨水集中利用、雨水渗透等技术进行集成优化,具有处理效果好、雨水利用率高、管理方便的优点。住宅小区中水回用属于封闭式污水再生回用系统,采用膜生物反应器（MBR）技术作为小区中水回用技术,具有占地面积少、工艺流程短、处理效率高等优点。     

废旧塑料的再生及其在制管行业中的应用

总结了再生、降解、焚烧及填埋等几种废旧塑料处置方式的特点,指出对于品种单一、老化程度低的废旧塑料应优先选择再生利用.重点介绍了废旧聚氯乙烯塑料、聚乙烯塑料、聚丙烯塑料、氯化聚氯乙烯塑料的再生及其在制管行业中的利用情况进展.     

我国废有色金属拆解利用再生产业发展现状

阐述了我国废金属拆解利用产业发展现状及存在的主要问题,提出了应对废金属拆解再生产业加强政府引导、加强回收体系建设、研发推广先进技术和改善税收政策等对策建议。     

城市垃圾分类回收中的循环经济

在分析我国城市垃圾现状的基础上,从资源、环境和社会可持续发展的角度,提出应在遵循循环经济的"三R"原则基础上对城市垃圾进行分类、收集、处理,并论述了实现措施.     

Performance improvement of a double-pass V-corrugated solar air heater under recycling operation

The device performance of double-pass V-corrugated solar air heaters with external recycle was investigated experimentally and theoretically. The comparison between V-corrugated and flat-plate collectors was made to show the thermal efficiency improvement with various operating parameters. The results show that the collector efficiency improvement of the recycling double-pass V-corrugated operation is much higher than those of the other configurations under various recycle ratios and mass flow rates. However, there exists the penalty on the power consumption increment due to implementing V-corrugated channel into the solar air heaters, an economic consideration on both the heat-transfer efficiency enhancement and power consumption increment for the double-pass V-corrugated device was also delineated. The experimental setup was carried out to validate the theoretical predictions, and the fairly good agreement between both results was achieved with the error analysis of 0.48-1.83%.     

Chemical Recovery of Useful Chemicals from Polyester (PET) Waste for Resource Conservation: A Survey of State of the Art

In this paper we present the main technologies developed over the last decades on chemical recycle of PET from a practical and economical point of view. We show details of plants used to carry out solvolitic reactions emphasising steps of purification, which are sometimes not considered when discussing chemical, recycle but which, in fact, are the key feasibility factors. The recycling or modification of PET to obtain monomers and other useful chemicals as intermediates and additives is carefully considered.     

循环半干法烟气脱硫对循环灰堵塞的分析及对策

以某130 t/h机组循环半干法烟气脱硫典型工程为例,通过调试运行,分析循环灰的堵塞问题,并提出几种对应措施。对新、老机组项目的运行、维护都非常经济、实用。     

废CRT玻璃循环利用现状与研究进展

随着技术的发展,CRT逐步被LED等取代。废弃CRT锥管玻璃含有氧化铅,含铅玻璃是一种对环境有害的物质,如何处理这些玻璃,是目前被广泛关注的课题之一。从循环利用的角度出发,分析了锥管玻璃的氧化物含量,将废弃CRT玻璃中的氧化物含量与照明及建材玻璃的组成比较,研究了废阴极射线管及屏锥在玻璃工业中的循环利用。