【作者】 张丽；

【导师】 李勇；

【作者基本信息】 苏州科技学院 ， 环境工程， 2008， 硕士

【摘要】 随着我国工农业的发展及人口的不断增多,污水量剧增,污水未经处理直接排入河道的现象普遍存在,造成我国地表水体的环境承载力下降。污染问题的日益突出,严重制约了城市的经济发展和影响人民身体健康。因此,急需探索出一种经济有效的河道水质改善方法。本研究提出利用生物促生技术改善河道水体水质,通过投加可促进土著微生物生长的生物促生剂,联合水力搅拌,人工强化微生物的降解能力,达到净化水质的目的。生物促生剂Bio-energizer(简称BE)集多项尖端生物技术、生态原理于一体,为生物治污技术的前沿,其中富含大量微生物必需的营养元素,如:微量元素、维生素、天然荷尔蒙、有机酸、促生素-细胞分裂素、酶等,具有安全可靠、无毒无害,使用简单,经济节能,管理方便等优点。通过室内动态的小试研究,考察底泥及不同水力条件下联合投加生物促生剂对河道水质净化效果的影响,初步探索出水质改善效果的变化规律,优选出适合于改善河道水质的最佳配比,并对生物促生技术在治理受污河道方面有一定的指导作用,对实际工程应用提供数据和理论支持,为进一步优化工艺提供技术参考。研究表明,在有底泥条件下,联合投加BE和控制水体流速,可以有效激发土著微生物的生理活性,通过微生物的同化、异化作用来吸附、降解其中的有机物及氮、磷等营养物质,从而快速有效地促进受污水体向良性生态系统演替。底泥能为水体修复提供良好的环境、充足的生物资源和丰富的营养物质,对水体生物修复过程贡献较大,净化效果总优于无底泥的水体。通过考察流速和BE投加量对水体修复效果的比较,得出流速是微生物降解总磷最主要的控制因素,除磷效果的最优配比是BE0ml/m3+流速0.064m/s+有底泥,经修复后,水体浊度降为2.5NTU,pH值可稳定在7.8～8.2之间;控制BE投药量是脱氮效果好坏的关键所在,脱氮的最优配比是BE5ml/m3+流速0m/s+有底泥,经修复后,水体浊度从37NTU降为0.5NTU,pH值可稳定在7.2～8.0之间。综上所述,生物促生技术能充分利用环境中固有的土著微生物作用,强化污染物质降解的自然规律,具有无污染、不破坏原有生态系统的优点,将其应用于河道水体的水质修复具有较广阔的前景。更多还原

【Abstract】 With the development of industry and agriculture and the growing population, sewage quantity raced up, untreated sewage was discharged directly into the river is common, caused to fall of the environmental bearing capacity of our surface water. The problem of water pollution is becoming a key factor restricting the development of economy and affecting people’s health. Therefore, we need to explore a cost-effective method to improve the water quality.The research uses biostimulation to bioremediate the water quality, by adding Bio-energizer which can promote the growth of aborigine’s microorganism, associate with hydraulic agitation, strengthening capacity of the microbial degradation to the objective of purifying water quality. Bio-energizer (abbreviation BE) set a number of cutting-edge biotechnology and ecological principles. It is the forefront of biotechnology. It is rich in a large number of essential nutrients such as microelements, vitamin, hormone and organic acid, cytokinin, enzyme and so on. It is on the safe side, innocuity, easy to use and manage. On the basis of dynamical laboratory tests under different conditions with adding BE, the study aimed to analyze the effect on river water purifying, exploring changing rules and choosing the best match. It is able to play a certain guiding role in river control. It offers data and theory supports to the project. Also it offers technical reference to optimize process.Research shows that it can stimulate the physiological activity of microorganisms with sediment, adding BE and controlling velocity of flow. It also can promote the succession of sewage body to fine ecosystem. The water body with sediment is better than without it. It provides a good environment, sufficient biological resources and rich nutrient. The velocity of flow is the most important controlling factor for phosphorus degration by examining the effect on the restoration of velocity and BE dosage. The best match is BE0ml/m3 + the flow rate0.064m/s + sediment. After bioremediation the turbidity fell to 2.5 NTU and pH can be stabilized between 7.8 ~ 8.2; Controlling dosage of BE is the key to remove nitrogen. The best match is BE5ml/m3 + the flow rate0m/s + sediment. After bioremediation the turbidity fell to 0.5 NTU and pH can be stabilized between 7.2 ~ 8.0. Biostimulation make full use of the microorganisms. It strengthens the rule of degradation. It is clean. It doesn’t destroy the original ecosystem. It has a broader outlook of being applied to the river bioremediation.更多还原