苏州高新区静脉产业循环经济发展的对策

以循环经济3R原则的理念,剖析了苏州高新区静脉产业存在的问题。深入分析了苏州高新区静脉产业发展循环经济的对策。为其按循环经济的规律运行作了有益的探索,也为其循环经济的顺利开展提供了科学依据。     

制浆造纸废水生物强化技术研究进展

制浆造纸废水是国内外公认的难处理的工业废水之一,文章介绍了生物强化技术在制浆造纸废水中的应用现状,在分析中,主要从生物强化技术、固定化微生物技术和环境生物制剂等方面,总结了制剂造纸废水生物强化技术的研究进展,并讨论了今后的研究方向。     

论循环经济在工业园区规划中的作用

新兴的工业园区在规划建设中应遵循一定的发展规律,而循环经济体现在区域层面即是中循环,这也正是现代工业集成的发展趋势。将循环经济理念融入工业园区的规划建设中已成必然。     

逆出水方向曝气反冲洗在动态膜生物反应器中的应用

采用逆出水方向曝气措施对以无纺布构建的动态膜生物反应器生活污水处理系统中的动态膜进行在线反冲洗.当反冲洗曝气强度为5.6 m³/(m²·h)、反冲洗时间为5　min时,生物动态膜的恢复需要45　min,生物动态膜恢复后出水浊度保持在5　NTU以下.在该反冲洗条件下,反应器稳定运行2个月,反冲洗周期可以稳定在15　h左右.扫描电镜观察表明,逆出水方向曝气反冲洗能够有效破坏附着在膜基材上的生物动态膜.生物动态膜截留能力研究表明,新的生物动态膜形成后,反应器对相对分子质量3×10⁴以上的有机物的截留率大于50％.逆出水方向曝气是一种经济有效的动态膜反应器在线清洗方法.     

大气污染物扩散模式的应用研究综述

应用大气污染物扩散模式可以模拟不同尺度、气象、地形条件下工业污染物在大气中的输送与扩散特征,为大气监测、城市环境规划和空气质量预报等工作提供科学依据.归纳了目前广泛应用于模拟工业污染物扩散的模式,着重介绍了近年来国内外对这些模式的主要应用研究进展,比较了各模式在应用上的优缺点,并对大气污染物扩散模式的应用研究前景进行了讨论.     

Effect of powdered activated carbon on Chinese traditional medicine wastewater treatment in submerged membrane bioreactor with electronic control backwashing

Chinese traditional medicine wastewater, rich in macromolecule and easy to foam in aerobic biodegradation such as Glycosides, was treated by two identical bench-scale aerobic submerged membrane bioreactors （SMBRs） operated in parallel under the same feed, equipped with the same electronic control backwashing device. One was used as the control SMBR （CSMBR） while the other was dosed with powdered activated carbon （PAC） （PAC-amended SMBR, PSMBR）. The backwashing interval was 5 min. One suction period was about 90 min by adjusting preestablished backwashing vacuum and pump frequency. The average flux of CSMBR during a steady periodic state of 24 d （576 h） was 5.87 L/h with average hydraulic residence time （HRT） of 5.97 h and that of PSMBR during a steady periodic state of 30 d （720 h） was 5.85 L/h with average HRT of 5.99 h. The average total chemical oxygen demand （COD） removal efficiency of CSMBR was 89.29% with average organic loading rate （OLR） at 4.16 kg COD/（m^3.d） while that of PSMBR was 89.79% with average OLR at 5.50 kg COD/（m^3.d）. COD concentration in the effluent of both SMBRs achieved the second level of the general wastewater effluent standard GB8978-1996 for the raw medicine material industry （300 mg/L）. Hence, SMBR with electronic control backwashing was a viable process for medium-strength Chinese traditional medicine wastewater treatment. Moreover, the increasing rates of preestablished backwashing vacuum, pump frequency, and vacuum and flux loss caused by mixed liquor in PSMBR all lagged compared to those in CSMBR; thus the actual operating time of the PSMBR system without membrane cleaning was extended by up to 1.25 times in contrast with the CSMBR system, and the average total COD removal efficiency of PSMBR was enhanced with higher average OLR.     

Simultaneous removal of ammonium and phosphate by zeolite synthesized from coal fly ash as influenced by acid treatment

Zeolite synthesized from fly ash （ZFA） without modification is not efficient for the purification of NH4＋ and phosphate at low concentrations that occur in real effluents, despite the high potential removal capacity. To develop an effective technique to enhance the removal efficiency of ammonium and phosphate at low concentrations, ZFA was modified with acid treatment and the simultaneous removal of ammonium and phosphate in a wide range of concentration was investigated. It was seen that when compared with untreated ZFA, only the treatment by 0.01 mol/L of H2SO4 significantly improved the removal efficiency of ammonium at low initial concentrations. The behavior was well explained by the pH effect. Treatment by more concentrated H2SO4 led to the deterioration of the ZFA structure and a decrease in the cation exchange capacity. Treatment by 0.01 mol/L H2SO4 improved the removal efficiency of phosphate by ZFA at all initial P concentrations, while the treatment by concentrated H2SO4 （≥0.9 mol/L） resulted in a limited maximum phosphate immobilization capacity （PIC）. It was concluded that through a previous mild acid treatment （e.g. 0.01 mol/L of H2SO4）, ZFA can be used in the simultaneous removal of NH4＋ and P at low concentrations simulating real effluent.     

自絮凝颗粒酵母酒精连续发酵过程精馏废液循环回用工艺的研究

以玉米粉双酶法制备的糖化液为底物,采用酵母细胞自絮凝形成颗粒作为细胞固定化方法在有效容积１．５ Ｌ小型悬浮床生物反应器中研究了不同酒精精馏废液循环比条件下的连续发酵工艺过程,并探讨了酒精精馏废液“全循环”的可行性．研究结果表明：虽然产生了比较强的副产物抑制效应,但该工艺能够稳定操作,为酒精发酵行业彻底解决废液污染问题提供了一条简便、可行的工艺路线     

城市综合污水处理厂出水消毒成本-效益分析

分析研究了污水处理厂出水液氯消毒实验所涉及的成本和效益概念,提出了相应的成本-效益分析的计算方法和计算参数.以无锡市芦村污水处理厂出水为例,30 mg/L有效氯作用30 min时,能杀灭出水中98%的大肠菌群,其实施成本约为730万元/a,而产生的总效益约为1 961万元/a.其中,减少肠道传染病发病的健康效益约767万元/a,减少湖水污染和蓝藻繁殖的环境效益约为1 194万元/a,整个技术的效益-成本比约为2.7∶1.      

建设资源循环型城市实现环境与经济协调发展

按工业生态和循环经济的理论建设资源循环型城市,提高资源利用率,实现城市可持续发展战略,实现生态城市的标志,调整产业结构、合理利用资源、防治污染,走新型工业化道路。从而实现环境与经济协调发展。