Abstract: A system for recovering ammonia from an ammonia-containing liquid, which system comprises a waste tank (10) for receiving ammonia-containing liquid entering the system; a filtration unit (14) comprising an ultrafiltration unit for receiving the ammonia-containing liquid from the waste tank (10) and filtering the ammonia-containing liquid to remove solids; an ammonia concentrating unit comprising a reverse osmosis unit (18) for receiving ammonia-containing liquid from the filtration unit (14) and concentrating the ammonia within the liquid; and an ammonia-recovery unit (100) for receiving concentrated ammonia-containing liquid from the ammonia concentrating unit (18) and recovering ammonia therefrom, wherein the ammonia-recovery unit (100) comprises a rectifier (102) for separating ammonia from the concentrated ammonia-containing liquid and recovering the ammonia as ammonia-containing gas; and wherein the system does not comprise an ammonia stripper.

Abstract: A system and method for removing ammonia from an ammonia-containing liquid is described. The system comprises a primary heat exchanger 12 for heating the ammonia-containing liquid to operational temperature, an ammonia stripper 14 for stripping ammonia from the ammonia-containing liquid from the primary heat exchanger and discharging it as ammonia-containing gas, and an acid scrubber 16 for reacting the ammonia in the ammonia-containing gas with acid to form an ammonium salt. The acid scrubber comprises a scrubbed air outlet 32 in fluid communication with a hot air inlet 20 of the ammonia stripper, such that scrubbed air which is discharged from the acid scrubber may be recycled for use in the ammonia stripper. Also described is a system and method for removing ammonia from an ammonia-containing liquid, wherein the system comprises a cold-water scrubber for removing ammonia from the ammonia-containing gas discharged from the ammonia stripper.

Abstract: Described is a pyrolysis system including an entrained flow pyrolyzer having an opening through which biomass can be added. The pyrolyzer also has an inlet for hot exhaust gas, an outlet for pyrolyzed biomass and an outlet for syngas. The system has a burner for producing hot exhaust gas and a conduit between the burner and the hot exhaust gas inlet. A syngas extraction means for extracting syngas from the pyrolyzer. The syngas extraction means extracts syngas from the pyrolyzer at a rate such that the internal pressure within the pyrolyzer never exceeds the pressure external to the pyrolyzer.

Abstract: A system for removing ammonia from landfill leachate comprising an economizer for producing high pressure hot water in a hot water circuit from heat exchange with a hot gas stream carrying waste heat; a boiler which is heated by the high pressure hot water to produce steam; and an ammonia stripper. The ammonia stripper has a leachate inlet connected to a leachate flow path, and an ammonia containing gas outlet. A leachate discharge outlet is connected to a leachate discharge flow path, and a steam inlet is provided which is connected to the boiler by a conduit. At a lower end of the ammonia stripper there is a forced air inlet. A randomly packed bed located between the upper end and the lower end. In use there is a flow of steam and air in one direction and of leachate in the opposite direction which releases ammonia from the leachate.

Abstract: The present invention provides a pyrolysis system comprising an entrained flow pyrolyser having an opening through which biomass can be added. The pyrolyser also has an inlet for hot exhaust gas, an outlet for pyrolysed biomass and an outlet for syngas. The system has a burner for producing hot exhaust gas and a conduit between the burner and the hot exhaust gas inlet. A syngas extraction means for extracting syngas from the pyrolyser. The syngas extraction means extracts syngas from the pyrolyser at a rate such that the internal pressure within the pyrolyser never exceeds the pressure external to the pyrolyser.