Growth of microalgae adapted to high-light temperature conditions in different types of wastewater.

IF 2.5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL
Hussein Abdel-Shafy, Reda Moghazy, Mona Mansour, Martin Kerner
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Abstract

To obtain microalgae strains adapted to wastewater in the Mediterranean region, microalgae present in the Nile River were cultivated at both high-light temperature (HLT) and low-light temperature (LLT) conditions. It was found that the species which became dominant under HLT was chlorophyta of the genus Scenedesmus. In contrast, under LLT, bacillariophyta became dominant. The microalgae strain (Scenedesmus arcuatus) was subsequently isolated and cultivated in different types of primary treated wastewater under HLT and LLT conditions. The different types of primary treated wastewater were black water (BW), grey water (GW), and sewage water (SW). Growth rates reached during the exponential phase at HLT using GW, BW, and SW were between 0.38 and 0.4 (day-1). At LLT, 1.5-2.7 folds of lower growth rates were determined due to limitation by CO2. Removal of COD and inorganic N and P from sewage wastewater reached up to 88, 96, and 100%, respectively. Results thus indicate that microalgae adapted to the climate conditions can be efficiently used for COD removal and nutrient recovery from wastewater in the Mediterranean.

不同类型废水中适应高光照温度条件的微藻的生长。
为了获得适应地中海地区废水的微藻菌株,在高光照温度(HLT)和低光照温度(LLT)条件下培养尼罗河中的微藻。结果发现,在高光照温度条件下占优势的物种是叶绿藻属 Scenedesmus。与此相反,在低光照温度条件下,叶绿藻属(bacillariophyta)成为优势物种。随后,分离出微藻菌株(Scenedesmus arcuatus),并在 HLT 和 LLT 条件下在不同类型的初级处理废水中进行培养。不同类型的初级处理废水分别为黑水(BW)、灰水(GW)和污水(SW)。在 HLT 条件下,GW、BW 和 SW 在指数期的增长率介于 0.38 和 0.4(天-1)之间。在 LLT 条件下,由于受到 CO2 的限制,生长率降低了 1.5-2.7 倍。污水中 COD 和无机氮、磷的去除率分别达到 88%、96% 和 100%。因此,研究结果表明,在地中海地区,适应当地气候条件的微藻类可有效去除废水中的 COD 并回收营养物质。
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来源期刊
Water Science and Technology
Water Science and Technology 环境科学-工程:环境
CiteScore
4.90
自引率
3.70%
发文量
366
审稿时长
4.4 months
期刊介绍: Water Science and Technology publishes peer-reviewed papers on all aspects of the science and technology of water and wastewater. Papers are selected by a rigorous peer review procedure with the aim of rapid and wide dissemination of research results, development and application of new techniques, and related managerial and policy issues. Scientists, engineers, consultants, managers and policy-makers will find this journal essential as a permanent record of progress of research activities and their practical applications.
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