微生态菌剂直投技术原位修复微污染水源水的试验研究

应用微生态菌剂直投技术处理城市微污染水源水体是控制季节性水质污染和水体富营养化的重要方法。采用实验室模拟的方法,研究了筛选制备的生态菌剂在自然条件下不同投加量对水质净化效果的影响。试验进行了32d,结果表明,微生态菌剂原位直投技术用于水源水质的原位改善是可行有效的,对水中主要污染物指标及其去除率分别可达到:氨氮100%、硝态氮76.2%、总氮80.9%、总磷90%、TOC 67.6%和CODMn40.6%;微生态菌剂可与水体的土著菌种叠加形成稳定的生态位,充分发挥了同步硝化反硝化作用。

FDI＇s Spillover Effects on China＇s Growth Quality

Using panel data of 29 regions in China from 1999 to 2007, this paper presents a systematic evaluation of how FDI＇s spillover effects impact the quality of China＇s indigenous econotnic growth, Research outcomes suggest that technology transfers and diffusion have a positive effect on indigenous growth quality. Spitlover effects （mainly competition effect） have primarily negatively affected indigenous growth quality. The effect on indigenous growth quality is positive only in sub-samples with high foreign capital concentration and ,,hen the spillover effect is similar to the technology transfer and diffusion effect brought about by localization. It is also found that technology gaps, foreign capital concentration and value added ratio gaps are important factors affecting the impact of technology transfer and diffusion on indigenous economic growth.