公开(公告)号：US12297132B2

公开(公告)日：2025-05-13

申请号：US17798386

申请日：2021-02-10

Applicant: BL TECHNOLOGIES, INC.

Inventor： John David Ireland ,  Zebo Long ,  Daniel Coutts ,  Dwight Cornelius Houweling ,  Jeffrey Gerard Peeters ,  Moreno Di Pofi ,  Sven Baumgarten

IPC: C02F3/30 ,  C02F3/10

Abstract: This specification describes a membrane aerated biofilm reactor (MABR) and processes for nitritation, nitritation-denitritation or deammonification. The supply of oxygen through the gas-transfer membrane is limited to suppress the growth of nitrite oxidizing bacteria (NOB). Exhaust gas from an MABR unit may have an oxygen concentration of 4% or less. The process can optionally include one or more of: intermittent (batch) feed of process air; process air modulation; process air direction reversal; process air recycle; and, process air cascade flow. The process can optionally include adding a seed sludge containing anammox to a reactor, optionally after pre-treatment and selection. The process can optionally include pre-seeding an MABR media.