School of Management, China University of Mining and Technology (Beijing Campus), Ding 11 Xueyuan Road, Beijing 100083, China; Center for Biorefining and Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Ave., St. Paul, MN 55108, USA.
Center for Biorefining and Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Ave., St. Paul, MN 55108, USA.
Bioresour Technol. 2016 Jul;211:584-93. doi: 10.1016/j.biortech.2016.03.102. Epub 2016 Mar 22.
Combining algae cultivation and wastewater treatment for biofuel production is considered the feasible way for resource utilization. An updated comprehensive techno-economic analysis method that integrates resources availability into techno-economic analysis was employed to evaluate the wastewater-based algal biofuel production with the consideration of wastewater treatment improvement, greenhouse gases emissions, biofuel production costs, and coproduct utilization. An innovative approach consisting of microalgae cultivation on centrate wastewater, microalgae harvest through flocculation, solar drying of biomass, pyrolysis of biomass to bio-oil, and utilization of co-products, was analyzed and shown to yield profound positive results in comparison with others. The estimated break even selling price of biofuel ($2.23/gallon) is very close to the acceptable level. The approach would have better overall benefits and the internal rate of return would increase up to 18.7% if three critical components, namely cultivation, harvest, and downstream conversion could achieve breakthroughs.
将藻类养殖与废水处理相结合以生产生物燃料被认为是资源利用的可行途径。本研究采用了一种更新的综合技术经济分析方法，该方法将资源可用性纳入技术经济分析中，以评估基于废水的藻类生物燃料生产，同时考虑了废水处理的改进、温室气体排放、生物燃料生产成本和副产物利用。本研究分析了一种创新方法，该方法包括在浓缩废水中培养微藻、通过絮凝收获微藻、生物质的太阳能干燥、生物质的热解转化为生物油以及副产物的利用，与其他方法相比，该方法产生了深远的积极结果。生物燃料的预估盈亏平衡点售价（2.23 美元/加仑）非常接近可接受水平。如果三个关键组件（即培养、收获和下游转化）能够取得突破，该方法将具有更好的整体效益，内部收益率将提高至 18.7%。
