Small biochar addition enhanced anammox granular sludge system for practical wastewater treatment: Performance and microbial community. (November 2022)

• Record Type: Journal Article
• Authors: Xie, Junxiang; Cao, Qianfei; An, Tianyi; Mabruk, Adams; Xie, Jiawei; Chang, Yaofeng; Guo, Menglei; Chen, Chongjun
• Is Part Of: Bioresource technology. Volume 363(2022)
• Publication Date: 2022-11
• Subjects: AnGS Anammox granular sludge -- B/N BOD/TN -- PCR Polymerase Chain Reaction -- AnAOB Anammox bacteria -- SEM Scanning electron microscope -- EPS Extracellular polymeric substances -- 3D-EEM Three-dimensional excitation-emission matrix -- FTIR Fourier transform infrared -- PN Proteins -- PS Polysaccharides -- S-EPS soluble layer -- LB-EPS loosely bound layer -- TB-EPS tightly bound layer -- DO dissolved oxygen; Anammox granular sludge -- Biochar addition -- Actual wastewater -- Nitrogen removal -- Microbial community; 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.2022.127749
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Peach biochar reactor had better performance in AnGS properties and nitrogen removal. High organic carbon inhibited AnAOB and B/N had the most significant effect on AnAOB. A moderate amount of organic matter promoted the proliferation of AnAOB. Peach biochar reactor had the higher abundance and stronger activity of AnAOB. Abstract: Anaerobic ammonium oxidation (Anammox) granular sludge (AnGS) has poor strength and is prone to disintegration under complex environmental conditions, especially in the presence of complex organic carbon, which renders the Anammox process instable. Herein, with a mixture of landfill leachate and domestic sewage as wastewater, the effect on the properties of AnGS with two small particle size (0.1–0.2 mm) biochars (coconut and peach biochars) addition were investigated at different COD concentrations (150 mg·L −1, 200 mg·L −1, and 250 mg·L −1 ), as well as at different BOD/TN (B/N) (0.3 and 0.5). Results showed that the nitrogen removal efficiencies decreased from 89 % to 72 % as the COD concentration increased by 100 mg·L −1, while peach biochar reactor had better nitrogen removal performance. Excessive organic carbon supply inhibits AnAOB proliferation and B/N had the most significant effect on AnAOB (p < 0.05). The Polymerase Chain Reaction (PCR) indicated peach biochar reactor get higher activity of anammox-related functional genes ( hzs A, hdh ).