文章基本信息

标题：Effects of nanobubble aeration in oxygen transfer efficiency and sludge production in wastewater biological treatment
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作者：Mehrdad Ahmadi ; Mehrdad Ahmadi ; Gholamreza Nabi Bidhendi 等
期刊名称：Journal of Advances in Environmental Health Research
电子版ISSN：2345-3990
出版年度：2018
卷号：6
期号：4
页码：225-233
DOI：10.22102/JAEHR.2019.140617.1092
语种：English
出版社：Kurdistan University of Medical Sciences
摘要：Low efficiency of conventional aeration techniques and the excessive production and disposal of sludge are great concerns in biological wastewater treatment systems. The present study aimed to evaluate the active sludge method using batch reactors under continuous operation to determine the efficiency of aeration and sludge production through microbubble and nanobubble aeration. The results indicated that compared to microbubble aeration, nanobubble aeration increased the concentration of dissolved oxygen in the mixed liqueur of the reactor (from 2 to 4.5 mg/l), while reducing the production of excess sludge from 100 to 40 ml/g (SRT: 15-40 d). With the same SRT duration, these values were within the range of 160-70 ml/g using fine-bubble aeration. According to the results, nanobubble aeration could increase the efficiency of aeration, thereby increasing the capacity of the treatment plant and reducing the costs of biological wastewater treatmen.
关键词：Air Nanobubbles; Dissolved Oxygen; Excess Sludge; Biological Wastewater Treatment