利用废弃有机物作为碳源，在污泥厌氧消化物中进行微藻混合营养培养以生产脂质和回收营养物质。
Lipids production and nutrients recycling by microalgae mixotrophic culture in anaerobic digestate of sludge using wasted organics as carbon source.
机构信息
College of Urban and Environment Sciences, Hunan Provincial Key Laboratory of Comprehensive Utilization of Agricultural and Animal Husbandry Waste Resources, Hunan University of Technology, 88 Taishan Road, Zhuzhou City, Hunan Province 412007, China.
College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China.
出版信息
Bioresour Technol. 2020 Feb;297:122379. doi: 10.1016/j.biortech.2019.122379. Epub 2019 Nov 9.
Insufficient organics in anaerobic digestate of sludge limited algal mixotrophic culture and caused low lipids production. In this study, enhancing lipids production and pollutants removal by adding acidified starch wastewater was tested for Chlorella pyrenoidosa mixotrophic culture. The results showed that an optimal addition of acidified starch wastewater into anaerobic digestate of sludge (1:1, v/v) improved biomass and lipids production by 0.5-fold (to 2.59 g·L) and 3.2-fold (87.3 mg·L·d), respectively. The acidified starch wastewater addition also improved the quality of algal biodiesel with higher saturation (typically in C16:0 and C18:0). In addition, 62% of total organic carbon, 99% of ammonium and 95% of orthophosphate in mixed wastewater were effectively removed by microalgae. This study provides a promising way to improve biodiesel production and nutrients recovery from anaerobic digestate of sludge using waste carbon source.
污泥厌氧消化物中有机物不足限制了藻类混合营养培养，导致产脂量低。在这项研究中，通过添加酸化淀粉废水来提高小球藻混合营养培养的产脂量和去除污染物。结果表明，将酸化淀粉废水以最佳比例（1:1，v/v）添加到污泥厌氧消化物中，分别将生物量和油脂产量提高了 0.5 倍（至 2.59 g·L）和 3.2 倍（87.3 mg·L·d）。添加酸化淀粉废水还提高了藻类生物柴油的质量，其中饱和脂肪酸（通常为 C16:0 和 C18:0）更高。此外，混合废水中 62%的总有机碳、99%的氨和 95%的正磷酸盐被微藻有效去除。本研究为利用废碳源提高污泥厌氧消化物中生物柴油的产量和养分回收提供了一种有前景的方法。
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