College of Civil and Transportation Engineering, Shenzhen University, Shenzhen, China.
Institute for Advanced Study, Shenzhen University, Shenzhen, China.
J Environ Manage. 2023 Dec 15;348:119285. doi: 10.1016/j.jenvman.2023.119285. Epub 2023 Oct 18.
To use unicellular microalgae to remove waste nutrients from brewery wastewater while converting them into algal biomass has been explored but high-cost treatment and low-value biomass associated with current technologies have prevented this concept from further attempts. In this study, a filamentous microalga Tribonema aequale was introduced and the alga can grow vigorously in brewery wastewater and algal biomass concentration could be as high as 6.45 g L which can be harvested by a cost-effective filtration method. The alga together with autochthonous bacteria removed majority of waste nutrients from brewery wastewater. Specifically, 85.39% total organic carbon (TOC), 79.53% total dissolved nitrogen (TN), 93.38% ammonia nitrogen (NH-N) and 71.33% total dissolved phosphorus (TP) in brewery wastewater were rapidly removed by co-cultivation of T. aequale and autochthonous bacteria. Treated wastewater met the national wastewater discharge quality, and resulting algal biomass contained large amounts of high-value products chrysolaminarin, palmitoleic acid (PLA) and eicosapentaenoic acid (EPA). It is anticipated that reduced cost of algal harvesting coupled with value-added biomass could make T. aequale as a promising candidate for brewery wastewater treatment and resource utilization.
利用单细胞微藻从啤酒废水中去除废营养物，同时将其转化为藻生物质，这一概念已经得到了探索，但由于当前技术的高处理成本和低生物质价值，这一概念尚未得到进一步尝试。在本研究中，引入了丝状微藻等鞭毛藻（Tribonema aequale），该藻类可以在啤酒废水中旺盛生长，藻类生物质浓度高达 6.45 g/L，可以通过成本效益高的过滤方法进行收获。藻类与土著细菌一起从啤酒废水中去除了大部分废营养物。具体而言，啤酒废水中的总有机碳（TOC）的 85.39%、总溶解氮（TN）的 79.53%、氨氮（NH-N）的 93.38%和总溶解磷（TP）的 71.33%被等鞭毛藻和土著细菌的共培养迅速去除。处理后的废水达到国家废水排放标准，所得藻类生物质含有大量高附加值产品岩藻黄质、棕榈油酸（PLA）和二十碳五烯酸（EPA）。预计藻类收获成本的降低加上增值生物质，将使等鞭毛藻成为啤酒废水处理和资源利用的有前途的候选生物。
