缓解藻类培养中奶制品废水中的氨氮缺乏问题。
Mitigating ammonia nitrogen deficiency in dairy wastewaters for algae cultivation.
机构信息
Center for Biorefining, and Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN, USA.
Center for Biorefining, and Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN, USA; MOE Biomass Energy Research Center and State Key Laboratory of Food Science, Nanchang University, Nanchang, Jiangxi, People's Republic of China.
出版信息
Bioresour Technol. 2016 Feb;201:33-40. doi: 10.1016/j.biortech.2015.11.029. Epub 2015 Nov 19.
This study demonstrated that the limiting factor to algae growth on dairy wastewater was the ammonia nitrogen deficiency. Dairy wastewaters were mixed with a slaughterhouse wastewater that has much higher ammonia nitrogen content. The results showed the mixing wastewaters improved the nutrient profiles and biomass yield at low cost. Algae grown on mixed wastewaters contained high protein (55.98-66.91%) and oil content (19.10-20.81%) and can be exploited to produce animal feed and biofuel. Furthermore, algae grown on mixed wastewater significantly reduced nutrient contents remained in the wastewater after treatment. By mitigating limiting factor to algae growth on dairy wastewaters, the key issue of low biomass yield of algae grown on dairy wastewaters was resolved and the wastewater nutrient removal efficiency was significantly improved by this study.
本研究表明，限制藻类在奶牛废水中生长的因素是氨氮缺乏。将奶牛废水与含有更高氨氮含量的屠宰废水混合。结果表明，混合废水以低成本改善了营养状况和生物量产量。在混合废水中生长的藻类含有高蛋白（55.98-66.91%）和高油含量（19.10-20.81%），可用于生产动物饲料和生物燃料。此外，在混合废水中生长的藻类显著降低了处理后废水中残留的营养物质含量。通过缓解限制藻类在奶牛废水中生长的因素，解决了藻类在奶牛废水中生长生物量产量低的关键问题，本研究显著提高了废水的养分去除效率。
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