Closing wastewater treatment energy balance through advanced nutrient removal and recovery

通过先进的营养物去除和回收实现废水处理能量平衡

• 批准号: 5897-2012
• 负责人: Oleszkiewicz, Jan
• 金额: $ 1.75万
• 依托单位: University of Manitoba
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=592820
• 关键词: Closing; wastewater; treatment; energy; balance

The proposed research will improve the environmental sustainability of wastewater treatment by simplifying the process of nitrogen removal and lowering its cost. It will increase the opportunity for phosphorus removal in different locations in the wastewater treatment facility and its subsequent recovery by commercial processes. The team assembled for this research has three main objectives. The first objective is to apply a novel technology where hydrogen gas is used to remove nitrogen using membrane biofilm reactors. This will be done by using non-porous membranes, which is a new technology at the prototype stage, therefore, allowing for exploration and discovery of new methods of nitrogen removal from wastewater and groundwater. In the second objective we propose to investigate the potential for recovery of supernatant from sludge treatment before anaerobic methane-generating digestion, using acid fermentation. This will result in the removal of filamentous microorganisms so they do not contribute to foaming in anaerobic digestion. The process is expected to lead to better digestibility of the sludge and improved methane generation, and an increase in phosphorus-rich supernatant for subsequent phosphorus recovery. The third objective involves a new anaerobic membrane bioreactor that introduces electrodes supplied with very low direct current to produce a high-quality effluent for non-potable industrial reuse. The impetus for this research is the fact that agricultural wastes and manures in the Prairies are required to use anaerobic digestion and removal of phosphorus, which causes eutrophication of Prairie lakes. This research will develop a mechanism by which phosphorus is solubilized and thus easily removed using magnesium compounds thus producing a usable fertilizer called struvite. The impact on Canadian economy of the research to be realized by the assembled team under my guidance is very significant: improve energy use and management at wastewater treatment plants; resolution of phosphorus removal concurrent with biogas recovery; improved removal of nutrients to meet the increasingly more stringent effluent standards.

拟议的研究将通过简化去除氮的过程并降低其成本来改善废水处理的环境可持续性。它将增加废水处理设施中不同位置去除磷的机会，并通过商业过程恢复。为这项研究组装的团队具有三个主要目标。第一个目标是应用一种新技术，使用氢气使用膜生物膜反应器去除氮。这将通过使用非孔膜（在原型阶段是一种新技术）来完成，因此可以探索和发现从废水和地下水中清除氮的新方法。在第二个目标中，我们建议研究使用酸发酵在厌氧甲烷产生消化之前从污泥处理中恢复上清液的潜力。这将导致去除丝状微生物，因此它们不会导致厌氧消化的泡沫。预计该过程将导致污泥和改善甲烷的产生更好的消化率，并增加富含磷的上清液，以增加磷回收。第三个目标涉及一种新的厌氧膜生物反应器，它引入了带有非常低直流电的电极，以产生高质量的废水，以用于非替代工业再利用。这项研究的推动力在于，大草原中的农业废物和肥料必须使用厌氧消化并去除磷，这会导致草原湖泊的富营养化。这项研究将开发出一种机制，通过该机制将磷溶解并因此使用镁化合物轻松去除，从而产生一种称为腾湖石的可用肥料。在我的指导下，组装团队实现的对加拿大研究的影响非常重要：改善废水处理厂的能源使用和管理；分辨磷去除与沼气回收的共同消除；改善了养分的去除，以满足越来越严格的废水标准。