Method for treating wastewater/water with fixed-film microorganism on porous carriers

A method of wastewater/water treatment comprising introducing an influent into a reactor so that a portion of contaminants in the influent is decomposed by microorganism in the reactor during a retention time of the influent in the reactor, and thus an effluent has a less amount of contaminants in comparison with the influent, wherein the improvement comprises the microorganism is grown on a modified porous carrier in the reactor, said modified porous carrier comprising a polymer foam and adsorbent particles entrapped in pores of the polymer foam;

• wherein said influent contains ammonia and/or nitrogen-containing compounds, and said adsorbent particles are zeolite particles, wherein said polymerfoam and said adsorbent particles are mixed together in an aqueous solution such that said adsorbent particles are entrapped in the pores of the polymer foam, and wherein said aqueous solution is said influent introduced in said reactor, and said mixing is driven by bubbles created in a bottom of said reactor.