Solid bacterial growth support for wastewater treatment, methods and uses thereof

A method for wastewater treatment using a solid bacterial growth support or a wastewater treatment system comprising said solid bacterial growth support, said solid bacterial growth support comprising:

• a body comprising at least one surface comprising a plurality of microparticles coupled to and partly inserted on said at least one surface, providing a biomass development surface of about 1.57 to 10 times larger than the biomass development surface of said body without microparticles,
• said solid bacterial growth support having a microparticle coverage of at least 50% of total surface for removal of ammoniacal nitrogen in said wastewater,
• said solid bacterial growth support providing a biomass development surface of about 100 to 600 m2/m3 when used as a fixed bed bacterial support and/or provides a biomass development surface of about 1250 to 3000 m2/m3 when used as a fluidized bed bacterial support,
• the method comprising contacting an influent of said wastewater with a plurality of said solid bacterial growth support or said wastewater treatment system, placed in an enclosure to be held together to form a treatment unit, said treatment unit having a size dependent on the flow rate and contaminant loads in said wastewater, said solid bacterial growth support being completely submerged in said wastewater, and
• said method providing removal of up to 99% ammoniacal nitrogen at a wastewater temperature of from about 0° C. to about 10° C., without heating of the influent
• wherein.