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)工艺是为高温、高氮负荷的工业蒸气开发的一种节能脱氮选择。PNA工艺可以去除有毒化合物氨氮和导致地表水富营养化的营养物质总氮，而不需要使用昂贵的外部碳源，曝气要求比传统处理减少60%。因此，PNA可以将脱氮的成本效益提高30%，并显著降低总脱氮的化学需要量。对**加拿大城市废水实施PNA Anammox将使面临基础设施老化和需要升级到更严格的出水营养限制的社区受益。然而，PNA工艺尚未被证明是加拿大典型市政当局典型的低温和低氮浓度(40mgN/L)城市废水的有效处理方法。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领域，并对PNA生物反应器的开发感兴趣，以应对不断增长的市场。由于与低温和低浓度系统相关的悬而未决的问题，该项目提出了对阻碍**PNA在加拿大城市废水中实施的主要问题的解决方案：1)快速建立自养生物膜，即在低温和低氮负荷下进行处理的微生物；以及2)通过防止建立不受欢迎的微生物(亚硝酸盐氧化剂)来延长过程稳定性的控制机制。

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).