Treatment of high-strength ammonia containing wastewater using partial nitritation system with biological selector

Abstract

In this paper, one partial nitritation system with biological selector (PNBS) was first evaluated in treating high-strength ammonia containing wastewater. Nitrite production rate (NPR) of 8.25 kg N m -3 d -1 was achieved with influent NH4-N concentration 2000 mg l -1 and HRT 3.2 h, which is, to our knowledge, the highest NPR to be treated successfully by an nitritation reactor. A genetic analysis of the organisms in the PNBS revealed an abundance of Nitrosomonas sp. ENI-11, uncultured bacterium clone: AnDHS-3, Nitrosomonas sp. ENI-11 and Nitrosomonas eutropha enriched in the PNBS reactor.

Integration of anammox into the MBR process for main stream sewage treatment

“…Its engineering remains far from mature, and the compositions of industrial wastewater and domestic sewage are complex, which presents significant challenges for the engineering promotion and stable operation of AX-MBR. Combined with the advantages of MBR, the potential of the AX-MBR process to save energy will inevitably result in huge returns; therefore, future research should focus on optimizing the operating conditions and measures for dealing with environmental changes (Jin et al 2015a(Jin et al , 2015b(Jin et al , 2016c(Jin et al , 2016dZhang et al 2016aZhang et al , 2016b. The direct denitrification of the AX-MBR process applied to actual wastewater at normal or low temperatures is an important developmental direction.…”