首页> 外文期刊>Applied Biochemistry and Biotechnology >Cultivating Chlorella sp. in a Pilot-Scale Photobioreactor Using Centrate Wastewater for Microalgae Biomass Production and Wastewater Nutrient Removal
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Cultivating Chlorella sp. in a Pilot-Scale Photobioreactor Using Centrate Wastewater for Microalgae Biomass Production and Wastewater Nutrient Removal

机译:培养小球藻中规模废水用于微藻生物质生产和废水营养去除的中试光生物反应器中

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This study is concerned with a novel mass microalgae production system which, for the first time, uses “centrate”, a concentrated wastewater stream, to produce microalgal biomass for energy production. Centrate contains a high level of nutrients that support algal growth. The objective of this study was to investigate the growth characteristics of a locally isolated microalgae strain Chlorella sp. in centrate and its ability to remove nutrients from centrate. A pilot-scale photobioreactor (PBR) was constructed at a local wastewater treatment plant. The system was tested under different harvesting rates and exogenous CO2 levels with the local strain of Chlorella sp. Under low light conditions (25 μmol·m-2s-1) the system can produce 34.6 and 17.7 g·m-2day-1 biomass in terms of total suspended solids and volatile suspended solids, respectively. At a one fourth harvesting rate, reduction of chemical oxygen demand, total Kjeldahl nitrogen, and soluble total phosphorus were 70%, 61%, and 61%, respectively. The addition of CO2 to the system did not exhibit a positive effect on biomass productivity or nutrient removal in centrate which is an organic carbon rich medium. The unique PBR system is highly scalable and provides a great opportunity for biomass production coupled with wastewater treatment.
机译:这项研究涉及一种新颖的大规模微藻生产系统,该系统首次使用浓缩废水流“ centrate”来生产微藻生物质,以进行能源生产。离心液含有高水平的营养物质,可帮助藻类生长。这项研究的目的是调查本地分离的微藻菌株小球藻的生长特性。浓缩液及其从浓缩液中去除营养的能力。在当地的废水处理厂建造了一个中试规模的光生物反应器(PBR)。该系统在不同的收获率和外源CO 2 水平下,以小球藻的本地菌株进行了测试。在弱光条件下(25μmol·m -2 s -1 ),系统可以产生34.6和17.7 g·m -2 day <分别以总悬浮固体和挥发性悬浮固体表示的sup> -1 生物量。在四分之一的收获速率下,化学需氧量,凯氏总氮和可溶性总磷的减少分别为70%,61%和61%。向该系统中添加CO 2 不会对生物质生产率或营养液中的养分去除产生积极影响,而该浓缩液是一种富含有机碳的培养基。独特的PBR系统具有高度可扩展性,为生物质生产和废水处理提供了巨大的机会。

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