Enhanced nitrate, fluoride, and phenol removal using polyurethane sponges loaded with rice husk biochar in immobilized bioreactor

Vertical spatial denitrification performance and microbial community composition in denitrification biofilters coupled with water electrolysis

“…The same phenomenon was reported in a previous study. 36 However, the lowest expression level of nirKS (NO 2 − → NO) was observed in the top zone, followed by the middle zone. It induced competition among dissimilatory nitrate reduction, assimilatory nitrate reduction, and denitrification for substrates.…”