SBIR Phase II: Energy Efficient COD Removal and De-nitrification for Re-circulating Aquaculture Facilities with a Combined Bio-electrochemical Process

这个小型企业创新研究(SBIR)第二阶段项目将为全球水产养殖业优化和试点测试一种新的、能量积极的反硝化方法。循环水产养殖系统面临着高昂的废水处理成本。利用生物电化学系统的最新进展，寒武纪的反硝化技术能够同时处理管道末端的化学需氧量(COD)和养殖池水中的硝酸盐，同时直接发电。第一阶段研发证明了水产养殖废水中存在外源电生微生物。流经反应器的处理后的硝酸盐浓度持续低于美国环保局饮用水浓度(10毫克/L)，同时平均去除65%的管道末端COD，产生超过96安培/立方米。一项经济分析表明，与竞争对手的系统相比，潜在的运营节省超过70%，并带来显著的生物安全效益。第二阶段的研发将集中于与合作伙伴公司优化处理率和反应堆参数，并在一个水产养殖场试行规模化反应堆。这项研究的更广泛影响是为循环水产养殖业引入解决水和能源问题的技术和策略。随着全球渔业的崩溃，水产养殖业正准备填补我们粮食生产的一个重要缺口。然而，循环系统尤其面临限制水强度和污染造成的环境损害的压力。生物电化学系统代表了一种将废物资源转化为能源的新方法，从而增加了农民S的底线，并解决了经济与可持续发展之间的紧张关系。未来的研究可以扩大到其他行业的应用。

This Small Business Innovation Research (SBIR) Phase II project will optimize and pilot test a novel, energy-positive approach to de-nitrification for the global aquaculture industry. Recirculating aquaculture systems suffer from high wastewater treatment costs. Leveraging recent advances in bio-electrochemical systems, Cambrian's de-nitrification technology is capable of simultaneously treating chemical oxygen demand (COD) at end of pipe and nitrates in culture tank water while generating electricity directly. Phase I R&D demonstrated the existence of exo-electrogenic microorganisms in aquaculture wastewater. A flow through reactor consistently treated nitrate to below EPA drinking water concentrations (10mg/L) while removing an average of 65% of end-of-pipe COD and generating over 96 Amps/m3. An economic analysis demonstrated potential operating savings of over 70%, and significant bio-security benefits, versus competing systems. Phase II R&D will focus on optimizing treatment rates and reactor parameters with partner firms, and piloting a scaled reactor at an Aquaculture farm.The broader impacts of this research are to introduce technologies and strategies that solve water and energy problems for the recirculating aquaculture industry. With the collapse of fisheries globally, the aquaculture industry is poised to fill an important gap in our food production. However, recirculating systems in particular are under pressure to limit environmental harm caused by water intensity and pollution. Bio-electrochemical systems represent a novel approach to turn waste resources into energy, thereby increasing farmer?s bottom line and resolving the tension between economics and sustainability. Future research can broaden applications to other industries.