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本文阐述了我实验室开展的絮凝性微生物研究工作。此项研究得到絮凝性菌株3株,给出絮凝活性与生长量的关系,初步建立了适合我地区的絮凝性细菌的筛选方法。 相似文献
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Mengyuan Zhu Guangwei Zhu Linlin Zhao Xin Yao Yunlin Zhang Guang Gao Boqiang Qin 《Environmental science and pollution research international》2013,20(3):1803-1811
Algal bloom could drastically influence the nutrient cycling in lakes. To understand how the internal nutrient release responds to algal bloom decay, water and sediment columns were sampled at 22 sites from four distinct regions of China’s eutrophic Lake Taihu and incubated in the laboratory to examine the influence of massive algal bloom decay on nutrient release from sediment. The column experiment involved three treatments: (1) water and sediment (WS); (2) water and algal bloom (WA); and (3) water, sediment, and algal bloom (WSA). Concentrations of dissolved oxygen (DO), total nitrogen (TN), total phosphorus (TP), ammonium (NH 4 + -N), and orthophosphate (PO 4 3? -P) were recorded during incubation. The decay of algal material caused a more rapid decrease in DO than in the algae-free controls and led to significant increases in NH 4 + -N and PO 4 3? -P in the water. The presence of algae during the incubation had a regionally variable effect on sediment nutrient profiles. In the absence of decaying algae (treatment WS), sediment nutrient concentrations decreased during the incubation. In the presence of blooms (WSA), sediments from the river mouth released P to the overlying water, while sediments from other regions absorbed surplus P from the water. This experiment showed that large-scale algal decay will dramatically affect nutrient cycling at the sediment–water interface and would potentially transfer the function of sediment as “container” or “supplier” in Taihu, although oxygen exchange with atmosphere in lake water was stronger than in columns. The magnitude of the effect depends on the physical–chemical character of the sediments. 相似文献
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上海市污染源废水在线监控系统的开发与应用 总被引:6,自引:0,他引:6
为提高现场监督水平和环境管理手段,及时监控企业排放状态、运用自动监测、计算机网络、数据库、GIS等多项先进和成熟的信息技术,集成开发了上海市重点污染源废水排放实时监控分析系统。在市、区监察队和企业分设三级在线监控中心,市级监控中心主要负责对市级重点污染的在线监控,并根据环境管理部门的需求,在监控信息进行综合分析。文章着重在介绍该系统的结构、功能和技术特点。 相似文献
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The first part of this paper reviews the environment-friendly techniques implemented when the Qinghai–Tibet Railway was built. They include (1) state-of-the-art techniques to protect the permafrost in the subgrade of the railway embankment; (2) measures to avoid disturbing the species in the Qinghai–Tibet Plateau; (3) efforts to minimize the disturbance of the grassland and wetland; and (4) regulation to ensure the environmental disposal of the construction waste. The second part presents the subsequent environmental challenges which, after the operation of the railway, potentially risk the fragile ecological and environmental system in the plateau. The challenges come from the skyrocketing tourists, expansive natural resource exploitation, the long-term efficiency of permafrost-protected measure, and climatic warming. 相似文献