title: Performance of aerobic granular sludge in a sequencing batch bioreactor for slaughterhouse wastewater treatment.
abstract: Lab-scale experiment was conducted to investigate the formation and characteristics of aerobic granular sludge for biological nutrient removal of slaughterhouse wastewater. Experimental results showed that removal performances of chemical oxygen demand (COD), ammonia and phosphate were enhanced with sludge granulation, and their removal efficiencies reached 95.1%, 99.3% and 83.5%, respectively. The aerobic granular sludge was matured after 90days cultivation, and protein-like substances were the main components. Simultaneously, the mass ratio of proteins and polysaccharides (PN/PS) was enhanced to 2.5 from 1.7. The granules with particle sizes of 0.6-1.2 and 1.2-1.8mm, accounting for 69.6%, were benefit for the growth of ammonia oxidizing bacteria (AOB) and nitrate oxidizing bacteria (NOB), and corresponding specific oxygen demand rates (SOUR) of AOB and NOB were 31.4 and 23.3mgO2/gMLSSh, respectively.
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Yali
authors.initials: Y
authors.lastname: Liu
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China; School of Civil Engineering, Yancheng Institute of Technology, Yancheng 224051, China. Electronic address: feixiang2004@163.com.
authors.forename: Xiaorong
authors.initials: X
authors.lastname: Kang
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Li
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Yixing
authors.initials: Y
authors.lastname: Yuan
mesh_terms: D000003:Abattoirs; D001420:Bacteria, Aerobic / Q000378:metabolism*; D019149:Bioreactors / Q000382:microbiology*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007220:Industrial Waste / Q000517:prevention & control; D009584:Nitrogen / Q000302:isolation & purification / Q000378:metabolism; D009930:Organic Chemicals / Q000302:isolation & purification / Q000378:metabolism; D012722:Sewage / Q000382:microbiology*; D062065:Wastewater / Q000032:analysis / Q000382:microbiology*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification / Q000378:metabolism*; D018508:Water Purification / Q000295:instrumentation
chemical_list: D007220:Industrial Waste; D009584:Nitrogen; D009930:Organic Chemicals; D012722:Sewage; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Aerobic granular sludge; Extracellular polymeric substances; Particle size; Slaughterhouse wastewater; Specific oxygen demand rates