Aerated granules for carbon, nitrogen and phosphorous removal using a bench scale sequencing batch reactor

加拿大的废水处理目前正在经历一个修改期，在此期间，更严格的条例已经生效或将在今后几年内生效。具体地说，工业废水，尤其是食品和饮料废水，其特点是氨和磷浓度较高；氨和磷对接收水的系统造成有害影响；氨导致急性和慢性毒性问题，包括鱼类死亡；磷导致富营养化，可能导致藻类大量繁殖、溶解氧损失，从而有可能导致鱼类死亡。食品和饮料行业产生高碳、总氮和磷浓度的废水。高浓度的碳、氮、磷和氨氮(60%到10%) 2 70 mg/L可对水生生物造成相当大的毒性效应，并可能构成富营养化的风险。在加拿大和全世界，生物处理是去除废水中碳和氨的最常见和最经济的方法。然而，传统的悬浮生长好氧或厌氧生物处理系统可能无法处理高碳氮磷比的食品饮料工业废水。好氧颗粒污泥工艺具有处理高有机负荷率的潜力，同时通过硝化、反硝化和微生物磷的积累在单个反应器中同时去除营养物质；然而，这种工艺的应用 餐饮废水处理的创新技术还没有得到充分的探索。特别是，关于食品和饮料废水中好氧颗粒的启动、运行和性能的信息很少。因此，本研究项目旨在通过研究曝气颗粒SBR的启动运行、碳、氮和磷的去除速率来提供环境可持续的废水处理方案，以制定在实验室规模开发和维护稳定的曝气颗粒污泥以去除营养物质的策略，未来的合作工作旨在中试规模试验。

Wastewater treatment in Canada is currently undergoing a period of revision wherein stricter regulations have come into force or will come into force over the next several years. Specifically, industrial wastewater, in particular food and beverage wastewater, is characterise by high ammonia and phosphorous concentrations Both ammonia and phosphorous cause deleterious impacts on the receiving aquatic systems; ammonia results in both acute and chronic toxicity issues, including fish death, and phosphorous leads to eutrophication that may results in algae blooms, loss of dissolved oxygen with the potential for fish death as a results as well. The food and beverage industry produce effluents with high carbon, total nitrogen and phosphorous concentrations. The high concentration of carbon, nitrogen, phosphorous and the ammonium nitrogen (60 to 270 mg/L) could cause considerable toxic effects to aquatic life and might pose the risk of eutrophication. Biological treatment is the most common and economical means of carbon and ammonia removal from wastewater in Canada and throughout the world. However, conventional suspended growth aerobic or anaerobic biological treatment systems might not be capable of treating food and beverage industry wastewater with the these high carbon:nitrogen:phosphorous ratios. An aerobic granular sludge processes has the potential capacity to treat high organic loading rates and simultaneously removes nutrient through nitrification, denitrification and microbial phosphorous accumulation in a single reactor; however the application of this innovative technology to treat the food and beverage wastewater is not fully explored. In particular information on the start-up operation and performance of aerobic granules in the food and beverage wastewater is scarce. Thus, this research project is aimed at providing environmentally sustainable wastewater treatment options by investigating the aerated granular SBR startup operation, removal rates of carbon, nitrogen and phosphorous to develop a strategy for the development and maintenance of stable aerated granules for nutrient removal at the lab scale with future collaborative work aimed at pilot scale testing.