Abstract: Disclosed are a process and system for simultaneous nitrification and denitrification of wastewater. The process comprises: (i) subjecting mixed liquor to treatment within at least one membrane aerated bioreactor (MABR), to provide a MABR effluent; (ii) treating said MABR effluent within at least one aeration tank to provide treated mixed liquor, wherein treating said MABR effluent within the at least one aeration tank comprises controlling dissolved oxygen (DO) concentration to be within a concentration range that supports simultaneous nitrification and denitrification within said at least one aeration tank; and (iii) discharging said treated mixed liquor; wherein said is under conditions to provide simultaneous nitrification and denitrification without circulation of mixed liquor.

Abstract: Disclosed are a process and system for simultaneous nitrification and denitrification of wastewater. The process comprises: (i) subjecting mixed liquor to treatment within at least one membrane aerated bioreactor (MABR), to provide a MABR effluent; (ii) treating said MABR effluent within at least one aeration tank to provide treated mixed liquor, wherein treating said MABR effluent within the at least one aeration tank comprises controlling dissolved oxygen (DO) concentration to be within a concentration range that supports simultaneous nitrification and denitrification within said at least one aeration tank; and (iii) discharging said treated mixed liquor; wherein said is under conditions to provide simultaneous nitrification and denitrification without circulation of mixed liquor.

Abstract: A wastewater treatment method comprising splitting wastewater influent into a first influent stream and second influent stream; subjecting the first influent stream to treatment within at least one membrane aerated biofilm reactor (MABR) to provide a MABR effluent; subjecting the second influent stream and said MABR effluent to treatment within an anaerobic ammonium oxidation (Anammox) reactor to obtain treated water effluent; and discharging from said Anammox reactor said treated water effluent. Also provided is a wastewater treatment system comprising at least one membrane aerated biofilm reactor (MABR) module; an anaerobic ammonium oxidation (Anammox) reactor comprising at least one inlet and an outlet for discharging treated water effluent; and a wastewater influent arrangement configured for splitting a wastewater influent to a first influent stream and a second influent stream and for supplying said first influent stream to said MABR module and said second influent stream to said Anammox reactor.

Abstract: The present disclosure provides a multi stage activated sludge system for biological wastewater treatment, having improved sludge settling properties, the multi stage activated sludge system comprising: an MABR tank comprising an MABR module, an MABR tank aeration unit configured for periodically aerating mixed liquor within the MABR tank, and an outlet from the MABR tank configured for selectively discharging partially settled sludge from the MABR tank, thus selecting for faster settling sludge.

Abstract: A system for treatment of ammonia in a feed water stream containing ammonia, the system comprising: an ion exchanger unit comprising: a feed inlet configured to receive the feed water stream; an ion exchanger bed configured to exchange the ammonia in the feed water stream and to provide thereby a treated effluent; and a treated effluent outlet configured to discharge the treated effluent from the ion exchanger unit; and a regeneration unit in fluid communication with the ion exchanger unit and configured to provide a regeneration brine for regenerating the ion exchanger bed, said regeneration unit comprising a Membrane Aerated Biofilm Reactor (MABR) for recovery of the regeneration brine.

Abstract: A wastewater treatment method comprising splitting wastewater influent into a first influent stream and second influent stream; subjecting the first influent stream to treatment within at least one membrane aerated biofilm reactor (MABR) to provide a MABR effluent; subjecting the second influent stream and said MABR effluent to treatment within an anaerobic ammonium oxidation (Anammox) reactor to obtain treated water effluent; and discharging from said Anammox reactor said treated water effluent. Also provided is a wastewater treatment system comprising at least one membrane aerated biofilm reactor (MABR) module; an anaerobic ammonium oxidation (Anammox) reactor comprising at least one inlet and an outlet for discharging treated water effluent; and a wastewater influent arrangement configured for splitting a wastewater influent to a first influent stream and a second influent stream and for supplying said first influent stream to said MABR module and said second influent stream to said Anammox reactor.