Restructuring water industry in China: towards sustainable urbanization

１　ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｄｕｓｔｒｉａｌｉｚａｔｉｏｎａｎｄｕｒｂａｎｉｚａｔｉｏｎａｒｅｔｗｏｍａｉｎａｓｐｅｃｔｓｏｆｅｃｏｎｏｍｉｃｄｅｖｅｌｏｐｍｅｎｔ．Ｃｈｉｎａｈａｓｂｅｅｎｕｎｄｅｒｇｏｉｎｇｔｈｅｓｅｃｏｕｒｓｅｓ．ＩｎｔｈｅｐｒｏｃｅｓｓｏｆＣｈｉｎｅｓｅｕｒｂａｎｉｚａｔｉｏｎ，ｔｈｅｐｒｏｐｏｒｔｉｏｎｏｆｕｒｂａｎｐｏｐｕｌａｔｉｏｎｉｎｔｏｔａｌｐｏｐｕｌａｔｉｏｎｉｎｃｒｅａｓｅｓｆｒｏｍ２５－８１％ｉｎ１９８８ｔｏ２９－９２％ｉｎ１９９７（ＳＳＢ，１９９０；…     

与赵忠祥的绿色对话

我是中央电视台这棵大树上的一片叶子，我为这个机体输送过经光合作用而形成的养分，也受这棵大树的支撑能在阳光下闪烁。尽管任何一片叶子都迟早会脱落，但是，这棵大树注定根深叶茂，日益繁盛。没有中央电视台就没有我。     

丝状菌污泥膨胀的微生物学理论与控制对策

在活性污泥系统中，由丝状菌过度繁殖引起的污泥膨胀是最难解决的问题之一。文章对与丝状菌污泥膨胀相关的微生物学和丝状菌生理生态学进行了讨论；介绍了现有的解释污泥膨胀的基本理论，并对丝状菌膨胀的控制措施进行了探讨。     

美国自然保护选民联合会

自然保护选民联合会（LCV）是美国一家旨在反映全国环保运动，并略带有政治观点的非政府组织，也是美国唯一一个竭力促使国会和白宫成为对环境负责任的国家权利机构的无党派和非营利组织。因而，也被称之为环境政治压力团体。     

受内压厚壁圆筒的弹塑性有限元分析及其在焊管管端定径工艺中的应用

此文用自行编制的弹塑性有限元程序对承受内压的厚壁圆筒进行了分析,考虑了材料的应变强化,分析了小变形情况下达到塑性极限点以后内压与径向位移之间的关系。并将其应用于焊管管端定径工艺分析中,得出了主要工艺参数。     

硫化氢捕消剂的应用试验研究

针对硫化氢气体的特点,研制了在泄漏事故中用于清除硫化氢气体的硫化氢捕消剂;开展了密闭空间和开放空间硫化氢清除应用试验,结果表明,硫化氢捕消剂能够有效地清除泄漏在空气中的硫化氢气体。     

Characterizing the antibiotic resistance genes in a river catchment: Influence of anthropogenic activities

Previous studies on environmental antibiotics resistance genes(ARGs) have focused on the pollution sources such as wastewater treatment plants, aquaculture and livestock farms,etc. Few of them had addressed this issue in a regional scale such as river catchment. Hence,the occurrence and abundances of 23 ARGs were investigated in surface water samples collected from 38 sites which located from the river source to estuary of the Beijiang River.Among them, 11 ARGs were frequently detected in this region and 5 ARGs(sul I, sul II, tet B,tet C, and tet W) were selected for their distribution pattern analysis. The abundances of the selected ARGs were higher in the upstream(8.70 × 10~6 copies/ng DNA) and downstream areas(3.17 × 10~6 copies/ng DNA) than those in the midstream areas(1.23 × 10~6 copies/ng DNA), which was positively correlated to the population density and number of pollution sources. Pollution sources of ARGs along the Beijiang River not only had a great impact on the abundances and diversity, but also on the distribution of specific ARGs in the water samples. Both sul I and sul II were likely originated from aquaculture farms and animal farms,tet W gene was possibly associated with the mining/metal melting industry and the electric waste disposal and tet C gene was commonly found in the area with multiple pollution sources.However, the abundance of tet B was not particularly related to anthropogenic impacts. These findings highlight the influence of pollution sources and density of population on the distribution and dissemination of ARGs at a regional scale.     

电化学辅助微电解法处理焦化废水

制备了锰粉改进的规整化微电解填料,采用电化学辅助改进微电解填料处理初始COD为6 153.6 mg/L、ρ(NH_3-N)为182.6 mg/L的焦化废水,优化了工艺条件。实验结果表明,电化学辅助微电解法处理焦化废水的最佳工艺条件为电压8 V,填料投加量20 g/L,初始废水pH 6,反应时间30 min。在此条件下废水COD去除率为75.3%,NH_3-N去除率为65.4%;在其他工艺条件相同的情况下,未通过电化学辅助的填料微电解反应的COD去除率为33.0%,NH_3-N去除率为16.2%,电化学辅助后的COD去除率和NH_3-N去除率均明显提高。     

Removal of nutrients and veterinary antibiotics from swine wastewater by a constructed macrophyte floating bed system

The potential of three varieties of Italian ryegrass (Lolium multiflorum Lam.), Dryan, Tachimasari and Waseyutaka, to improve the water quality of swine wastewater was evaluated using a constructed macrophyte floating bed system. With respect to reductions in levels of nutrients, chemical oxygen demand (COD), and sulfonamide antimicrobials (SAs, including sulfadiazine, sulfamethazine, and sulfamethoxazole), Dryan performed better than Tachimasari and Waseyutaka. For Dryan, total N was reduced by 84.0%, total P by 90.4%, COD by 83.4% and sulfonamide antimicrobials by 91.8–99.5%. Similar results were observed for Tachimasari and Waseyutaka. The results indicated that the treatment of swine wastewater using the constructed macrophyte floating bed system was effective in the removal of nutrients and veterinary antibiotics.     

生态旅游环境容量研究进展

生态旅游环境容量是在生态旅游研究成熟后的另一个热点,通过对国内外相关文献梳理后发现,国外对生态旅游环境容量的研究起步较早、成果颇丰、用途广泛且研究体系自成一脉,国内对生态旅游环境研究取得成绩的同时还有很多不足,特别是现有的测量方法已落后于生态旅游的发展,今后需系统梳理生态旅游容量的理论,并在理论指导下提出适合自身的动态测量模式,进一步向旅游环境容量综合管理转变。