Sulfidation forwarding high-strength Anammox process using nitrate as electron acceptor via thiosulfate-driven nitrate denitratation. (January 2022)

• Record Type: Journal Article
• Authors: Lin, Wenmin; Feng, Jiyu; Hu, Keqiang; Qu, Bingyu; Song, Song; He, Kuang; Liu, Chang; Chen, Yuancai; Hu, Yongyou
• Is Part Of: Bioresource technology. Volume 344:Part B(2022)
• Publication Date: 2022-01
• Subjects: Autotrophic denitrification -- Anammox -- Sulfur-oxidizing bacteria -- High ammonium wastewater -- Nitrogen removal; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2021.126335
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: High TN removal (83.66%) was achieved at the NLR of 2.6 kg-N/(m 3 ·d) in TDSA. Sulfate production was greatly reduced in TDSA system. Unique S 0 @ Anammox granules could tolerate high FA and DO. The contributions of various nitrogen removal pathways were investigated. Nitrogen and sulfur conversion mechanism in TDSA system was proposed. Abstract: A single up-flow thiosulfate-driven nitrate denitratation coupled with the sulfurized Anammox (TDSA) with the core–shell structure (S 0 @ Anammox granules) provided a chemical/energy-saving way for the removal of high-content ammonium with nitrate as electron acceptor. Approximately 83.66% total nitrogen removal efficiency (TNRE) could be achieved by the sulfurized Anammox encrusted by S 0 /Sn 2− at a high loading rate (2.6 kg-N/(m 3 ·d)) via resisting high concentration of free ammonia (FA) (22.35 mg/L), mainly through S2 O3 2−, S 0 /Sn 2− -driven partial denitrification-Anammox (PDN-Anammox) process. Moreover, S 0 /Sn 2− -PDN-Anammox was largely restricted when intermittently aerated, but still resulting in 74.47% TNRE due to the partial nitrification-Anammox (PN-Anammox). The sequencing analysis revealed that Anammox bacterium ( Candidatus_Kuenenia ) and sulfur-oxidizing bacterium ( Thiobacillus ) coexisted, in which Anammox process occurred mainly via NO instead of NH2 OH. This study provided a new perspective for high concentration nitrogen wastewater removal in engineering applications.