Influence of salt addition to stimulating biopolymers production in aerobic granular sludge systems

被引：15
作者：
Amancio Frutuoso, Francisca Kamila [1 ]
dos Santos, Amanda Ferreira [1 ]
da Silva Franca, Leonardo Levy [1 ]
Mendes Barros, Antonio Ricardo [1 ]
dos Santos, Andre Bezerra [1 ]
机构：
[1] Univ Fed Ceara, Dept Hydraul & Environm Engn, Fortaleza, Ceara, Brazil
来源：
CHEMOSPHERE | 2023年 / 311卷
关键词：
Aerobic granular sludge (AGS); Industrial wastewaters; Biorefinery; Alginate-like exopolymers (ALE); Tryptophan; Salt concentration; EXTRACELLULAR POLYMERIC SUBSTANCES; ALGINATE-LIKE EXOPOLYSACCHARIDES; ACTIVATED-SLUDGE; CARBON SOURCE; REMOVAL; STABILITY;
D O I：
10.1016/j.chemosphere.2022.137006
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The influence of salt addition to stimulating biopolymers production in aerobic granular sludge (AGS) systems was evaluated. The control systems (R1: acetate and R2: propionate) initially obtained less accumulation of mixed liquor volatile suspended solids (MLVSS), indicating that the osmotic pressure in the salt-supplemented systems (R3: acetate and R4: propionate) contributed to biomass growth. However, the salt-supplemented sys-tems collapsed between days 110 and 130 of operation. R3 and R4 showed better performance regarding nu-trients removal due to the greater abundance of nitrifying and denitrifying bacteria and phosphate-accumulating organisms. Salt also contributed to the higher production of biopolymers such as alginate-like exopolymers (ALE) per gram of volatile suspended solids (VSS) (R1: 397 mgALE center dot gVSS-1, R2: 140 mgALE center dot gVSS-1, R3: 483 mgALE center dot gVSS-1, R4: 311 mgALE center dot gVSS-1). Amino acids like tyrosine and tryptophan were better identified in extracellular polymeric substances extract from salt-operated reactors. This study brings important results in the context of resource recovery by treating saline effluents.
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页数：12
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