摘要
人工湿地是利用介质、植物和微生物构成的复合系统来处理污水。湿地植物如芦苇,具有根系放氧的性能,可在局部区域形成微氧环境,有利于好氧微生物的生长。人工湿地中生物膜的微生物活性直接影响到系统的功效。针对寒冷地区季节性运行的人工湿地,研究了两级逆向垂直潜流人工湿地中微生物INT脱氢酶活性(DHA)的变化。结果表明,系统中0.15 m深度较0.22 m深度的微生物DHA高,可能的原因是由于根系活动和受大气复氧的影响。DHA受温度变化影响明显。系统启动初期,微生物DHA随气温升高而升高;系统运行后期,DHA随气温降低相应下降。同时,DHA受营养物水平影响,高营养对应着高活性。
Constructed wetland is a new energy -saving wastewater treatment technology, which is consisted of media, macrophites and microorganisms. Emergent macrophyte like reed processes the function of oxygen release, which can form micro - environment with aeration in local region and stimulate aerobic microorganism growth. The microorganism activity in biofilm on the media of constructed wetland affects the efficiency of the system directly. The paper studied microorganism INT -dehydrogenase activity （DHA） spatial variation in seasonal running two-stage inverse vertical subsurface constructed wetland wastewater treatment systems. The results showed that in the system, the microorganisms INT- DHA at the depth of 0.15 m was higher than that of 0.22 m depth, the possible reason is due to the effect of plant roots ac- tivity and air re - aeration. The microorganisms INT - DHA was affected by temperature, the microorganisms INT -DHA increased with the increasing of temperature during the system startup and decreased with the decreasing of temperature during the later period of the system running. At the same time, nutrients level in wastewater affected the microorganisms INT - DHA, higher nutrients level corresponds to higher INT - DHA.
出处
《大连民族学院学报》
CAS
2008年第3期193-196,共4页
Journal of Dalian Nationalities University
基金
建设部科技开发项目(04-2-067)
