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氨污泥液在处置前需要进行管理。硝化/反硝化或硝化-厌氧氨氧化（厌氧氨氧化）工艺是一种很有前途的低能耗高氨污泥脱除技术，但通常在中温（25-40°C）下工作，这限制了反应器在加拿大寒冷天气条件下的性能。拟议的研究将采用实验规模和中试规模的IFAS生物反应器来评估适用于低温条件下处理富氨污泥液的氨还原策略。将在可控条件下评估和优化三个实验规模工艺，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，以影响微生物种群动态和功能，并提高氨去除效率。开发一种稳定、高效的富氨污泥液处理中试工艺，模拟全规模污水处理工艺。据我们所知，这是探索在加拿大寒冷天气条件下开发高效、低成本的富氨污泥液氨去除处理的第一项工作。这种处理将为加拿大带来重大的经济和环境效益。参加CRD项目的高素质人才将获得学术和工业知识和经验，这将加强阿尔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.