Strategies to improve ammonia removal from ammonia-rich sludge liquor in Canada

城市污泥脱水过程中产生的富铵污泥液在处置前需要进行管理。亚硝化/反硝化或亚硝化-厌氧氨氧化(Anammox)工艺是一种低能耗、高氨氮的去除技术，但通常工作在中温(25-40℃)，这限制了反应器在加拿大寒冷天气条件下的性能。*本研究将采用小试和中试规模的IFAS生物反应器来评估适用于低温富氨污泥液处理的氨还原策略。将在受控条件下评估和优化三个小试规模的工艺，包括两个反应器硝化/反硝化、两个反应器硝化/厌氧氨氧化和一个反应器硝化/厌氧氨氧化，以影响微生物种群的动态和功能，并提高氨氮的去除效率。开发稳定高效的富氨污泥液处理中试工艺，模拟全规模废水处理过程。*据我们所知，这是第一次探索在加拿大寒冷天气条件下开发一种高效、低成本的富氨污泥液脱氨处理方法。这种处理方式将为加拿大带来显著的经济和环境效益。参加该CRD计划的高素质人员将获得学术和行业知识和经验，这将加强艾伯塔省和加拿大在废水处理管理方面的能力。**

Ammonium-rich sludge liquor generated during municipal sludge dewatering processes needs to be managed before disposal. Nitritation/denitritation or nitritation-anammox (anaerobic ammonium oxidation) processes are promising technologies for high ammonia sludge liquor removal with low energy cost, but usually work at mesophilic temperatures (25-40 °C), which limits reactor performance in Canadian cold weather conditions.****The proposed study will employ bench scale and pilot scale IFAS bioreactors to evaluate an ammonia reduction strategy for treatment of ammonia-rich sludge liquor that is suitable under low temperatures. Three bench scale processes, including two reactor nitritation/denitritation, two reactor nitritation/anammox, and one reactor nitritation/anammox, will be evaluated and optimized under controlled conditions to influence microbial population dynamics and functionality and to increase ammonia removal efficiency. A stable and efficient pilot scale process for ammonia-rich sludge liquor treatment will be developed to simulate a full scale wastewater treatment process. ****To our knowledge, this is the first work that explores the development of an efficient, low cost ammonia removal treatment for ammonia-rich sludge liquor under Canadian cold weather conditions. Such treatment will provide significant economic and environmental benefits to Canada. The highly qualified personnel participating in this CRD Program will obtain academic and industrial knowledge and experience that will strengthen Alberta's and Canada's capacities in wastewater treatment management.**