Department of Biology and Environmental Science, Centre for Ecology and Evolution and Microbial Model Systems, Linnaeus University, 39231 Kalmar, Sweden.
Department of Biology and Environmental Science, Centre for Ecology and Evolution and Microbial Model Systems, Linnaeus University, 39231 Kalmar, Sweden; School of Business, Innovation and Sustainability, Halmstad University, 30118 Halmstad, Sweden.
Bioresour Technol. 2024 Oct;410:131250. doi: 10.1016/j.biortech.2024.131250. Epub 2024 Aug 8.
Mixotrophic microalgal solutions are efficient nutrient recovery methods, with potential to prolong the cultivation seasons in temperate climates. To improve operation sustainability, the study used landfill leachate for nitrogen source and whey permeate for phosphorus and organic carbon. A non-axenic polyculture, dominated by green algae, was cultivated in mixotrophic mode on glucose or whey permeate compared to a photoautotrophic control in outdoor pilot-scaled raceway ponds during Nordic spring and autumn. The whey permeate treatment had the highest algal growth rate and productivity (0.48 d, 183.8 mg L d), nutrient removal (total nitrogen: 21.71 mg L d, total phosphorus: 3.05 mg L d) and recovery rate (carbon: 85.19 mg L d, nitrogen: 17.01 mg L d, phosphorus: 2.58 mg L d). When grown in whey permeate, algal cultures demonstrated consistent productivity and biochemical composition in high (spring) and low light conditions (autumn), suggesting the feasibility of year-round production in Nordic conditions.
混合营养微藻溶液是一种有效的养分回收方法，具有延长温带气候下培养季节的潜力。为了提高运行的可持续性，该研究使用垃圾渗滤液作为氮源，乳清渗透物作为磷和有机碳源。在北欧春季和秋季的户外中试跑道池塘中，与光自养对照相比，以非纯培养的绿藻为主的混合营养培养物在葡萄糖或乳清渗透物上进行了混合营养培养。乳清渗透物处理的藻类生长速率和生产力最高（0.48 d，183.8 mg L d），养分去除率（总氮：21.71 mg L d，总磷：3.05 mg L d）和回收率（碳：85.19 mg L d，氮：17.01 mg L d，磷：2.58 mg L d）。当在乳清渗透物中生长时，藻类培养物在高光（春季）和低光条件（秋季）下表现出一致的生产力和生物化学组成，表明在北欧条件下全年生产的可行性。
