Developing a rapid start-up technology for a novel moving bed anammox biofilm reactor MBABR

部分亚硝化-厌氧氨氧化（PNA）工艺是一种节能的脱氮选择，已开发用于高温，高氮负荷的工业流。PNA工艺允许去除氨氮（一种有毒化合物）和总氮（一种导致地表沃茨富营养化的营养物），而不使用昂贵的外部碳源，并且比常规处理少60%的曝气要求。因此，PNA可以将脱氮的成本效益提高30%，并显着降低总脱氮的化学要求。对 ** 加拿大城市废水实施PNA厌氧氨氧化将使面临基础设施老化和需要升级到更严格的污水营养物限制的社区受益。然而，PNA工艺尚未被证明是一种有效的处理方法，用于低温和低氮浓度（40 mg N/L）的城市废水，典型的加拿大城市。Headworks-Bio是一家加拿大移动床生物膜反应器（MBBR）供应商，一直在努力扩展到厌氧MBBR，并对开发PNA生物反应器以应对不断增长的市场感兴趣。由于低温和低浓度系统存在未解决的问题，该项目提出了解决阻碍对加拿大城市废水实施 **PNA的主要问题的方法：1）在低温和低氮负荷下快速建立自养生物膜，即进行处理的微生物;和2）通过防止不需要的微生物（亚硝酸盐氧化剂）的建立来延长工艺稳定性的控制机制。

The partial nitritation-anammox (PNA) process is an energy efficient option for nitrogen removal that has been developed for high temperature, high-nitrogen load industrial streams. The PNA process allows for removal of ammonia nitrogen, a toxic compound, and total nitrogen, a nutrient contributing to eutrophication of surface waters, without the use of expensive external carbon sources, and 60% less aeration requirements than conventional treatment. Thereby, PNA could increase cost-effectiveness of nitrogen removal by 30% and significantly reduce chemical requirements for total nitrogen removal. Implementation of PNA anammox for**Canadian municipal wastewaters would benefit communities faced with aging infrastructure and the need to upgrade to more stringent effluent nutrient limits. However, the PNA process has not yet been demonstrated as an effective treatment method for low temperature and low nitrogen concentration (40 mg N/L) municipal wastewaters typical of Canadian municipalities. Headworks-Bio, a Canadian vendor of moving bed biofilm reactors (MBBR) has been striving to expand into the anaerobic MBBR and was interested in development of an PNA bioreactor to answer the growing market. With unresolved problems associated with low temperature and low concentration systems, the project proposes solutions to the major issues preventing implementation of**PNA to Canadian municipal wastewaters: 1) rapid establishment of autotrophic biofilm, the microorganisms performing treatment, under low temperatures and low nitrogen loads; and 2) control mechanisms for prolonged process stability by preventing the establishment of undesirable microorganisms (nitrite oxidizers).