A wastewater nitrogen and phosphorus removal method based on sulfur autotrophy without added carbon source

Abstract

This invention discloses a wastewater treatment method based on sulfur autotrophy without added carbon sources, belonging to the field of sulfur autotrophic technology. It employs an upflow reactor, with the packing zone filled with layered wastewater treatment filter media. The filter media uses lignocellulose nanofibers as the base layer, and the functional layer consists of sulfur-based composite filter media and cuprous oxide / ferrous oxide heterojunctions, loaded with sulfur autotrophic denitrifying bacteria. This method requires no added organic carbon source and achieves simultaneous nitrogen and phosphorus removal from wastewater with a low C / N ratio through adsorption-catalysis-biological synergistic effects. The raw materials are derived from industrial and agricultural waste, exhibiting good environmental compatibility and applicability to municipal and aquaculture wastewater treatment.