Synergic Adsorption–Biodegradation by an Advanced Carrier for Enhanced Removal of High-Strength Nitrogen and Refractory Organics

• DOI: 10.1021/acsami.7b01251
• Publication Date: 2017-03-29T09:18:47Z
• Authors: Muhammad Ahmad; Sitong Liu; Nasir Mahmood; Asif Mahmood; Muhammad Ali; Maosheng Zheng; Jinren Ni
• Keywords: Anammox; Nitrifying Bacteria; Biofilter

Coking wastewater contains not only high-strength nitrogen but also toxic biorefractory organics. This study presents simultaneous removal of quinoline, carbon, and ammonium in coking by immobilized bacterial communities composed a heterotrophic strain Pseudomonas sp. QG6 (hereafter referred as QG6), ammonia-oxidizing bacteria (AOB), anaerobic oxidation (anammox). The immobilization was implemented with the help self-designed porous cubic carrier that created structured microenvironments including an inner layer adapted for bacteria, middle suitable coaggregation certain aerobic outer bacteria. By coating functional polyurethane foam (FPUF) iron oxide nanoparticles (IONPs), biocarrier (IONPs–FPUF) could provide good outer-layer barrier absorption selective treatment aromatic compounds QG6, offer conducive environment anammox layer, mutualistic AOB layer. Consequently, nitrification denitrification were reached significant up to 322 mg L–1 (98%) NH4, 311 (99%) NO2, 633 (97%) total (8 averaged NO3 concentration recorded effluent), accompanied efficient chemical oxygen demand 3286 350 (100%) quinoline. provides alternative way promote synergic adsorption biodegradation modified has great potential containing organic pollutants, nitrogen.