Pilot scale investigation and optimization of the moving bed bioreactor (MBBR) as an ammonia removal upgrade technology for lagoon wastewater treatment systems

移动床生物反应器（MBBR）作为泻湖废水处理系统除氨升级技术的中试研究和优化

• 批准号: 436450-2012
• 负责人: Delatolla, Robert
• 金额: $ 4.05万
• 依托单位: University of Ottawa
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=498636
• 关键词: Pilot; scale; investigation; optimization; moving

Biological treatment is the most common and economical means of ammonia removal in wastewater. However, at cold temperatures nitrification rates decline substantially or become completely impeded in many treatment systems in Canada. Over 1000 aerated lagoon treatment facilities are presently in operation in Canada and due to their large exposed surface areas are subject to low temperatures in the winter. Attached growth processes and specifically the moving bed biofilm reactor (MBBR) has shown promise with respect to low temperature nitrification; however, the MBBR technology has not been studied nor optimized during long exposures to 1ºC, a common temperature of wastewater exiting lagoons during winter months. Furthermore, a fundamental gap in knowledge exists with respect to the response of attached biofilm and embedded microbial communities in wastewater treatment systems exposed to very cold temperatures for long durations. The objective of this research is to investigate and optimize the performance of the MBBR technology as an upgrade treatment for lagoon systems at cold temperatures and further develop a fundamental understanding of attached growth biofilm and biomass characteristics at very cold temperatures. In addition, the study will investigate methods to optimize the treatment efficiency and operational costs of MBBR units during warm temperature and low ammonia concentration conditions in upgrade MBBR systems designed to oxidize high ammonia concentrations at very cold temperatures. Furthermore, the study will characterize the solids exiting the nitrifying upgrade MBBR treatment systems using digital particle size analysis. Next generation genetic sequencing, environmental scanning electron microscopy and confocal laser scanning microscopy in combination with live/dead viability staining and fluorescent in-situ hybridization will be used to investigate the effects of temperature, loading and biocarrier geometry on the biofilm and biomass attached to the MBBR carriers. Ultimately theses advances will help reduce the risks to the environment, fisheries resources, and human health by decreasing the discharge of harmful deleterious substances.

生物处理是去除废水中氨氮最常用、最经济的方法。然而，在加拿大的许多处理系统中，在低温下硝化速率大幅下降或完全受阻。目前在加拿大有1000多个曝气泻湖处理设施在运行，由于其大的暴露表面积在冬季会受到低温的影响。附着生长过程，特别是移动床生物膜反应器（MBBR）已显示出低温硝化的前景;然而，MBBR技术尚未在长时间暴露于1ºC（冬季离开泻湖的废水的常见温度）期间进行研究或优化。 此外，在知识方面存在根本的差距，附着的生物膜和嵌入的微生物群落在废水处理系统中暴露于非常冷的温度长时间的响应。本研究的目的是调查和优化的MBBR技术的性能，作为一个升级处理泻湖系统在寒冷的温度和进一步发展的附着生长生物膜和生物量特性在非常寒冷的温度下的基本理解。此外，该研究还将探讨在温暖的温度和低氨浓度条件下优化MBBR装置的处理效率和运行成本的方法，以在非常冷的温度下氧化高氨浓度的升级MBBR系统。此外，该研究将使用数字粒度分析来表征离开硝化升级MBBR处理系统的固体。下一代基因测序，环境扫描电子显微镜和共聚焦激光扫描显微镜结合活/死活力染色和荧光原位杂交将用于研究温度，负载和生物载体的几何形状上的生物膜和生物量附着到MBBR载体的影响。最终，这些进展将有助于减少有害物质的排放，从而降低对环境、渔业资源和人类健康的风险。