首页|Recovery of cyanophycin granule polypeptide from activated sludge:carbon source dependence and aggregation-induced luminescence characteristics

Recovery of cyanophycin granule polypeptide from activated sludge:carbon source dependence and aggregation-induced luminescence characteristics

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In the sewage treatment process,facilitating the conversion of pollutants into value-added resources holds great potential for reducing the amount of greenhouse gas emissions and promoting economic circulation.Cyanophycin granule polypeptide(CGP),a recently discovered high value-added biopolymer present in activated sludge,has provided new avenues for the recovery of resources.However,the mechanisms that regulate CGP synthesis and the characteristics of this biopolymer in activated sludge remain unclear thus far.This study investigated the synthesis of CGP,polyhydroxyalkanoates(PHA),and alginate-like exopolysaccharides(ALE)in various microbial aggregates under different carbon sources feeding conditions.Our results showed that the CGP yields was superior that of PHA and ALE when subjected to identical carbon source feeding conditions.Furthermore,biofilm was more conducive to CGP accumulation than floc sludge.Compared with glucose and methanol,sodium acetate significantly enriched the CGP synthetase-encoding gene(cphAabundance=～17419),resulting in the highest CGP yield(average 107.1 mg/g MLSS)in both biofilm and floc sludge.This study is the first to reported the characteristic fluorescence of CGP(Ex/Em=～360/450 nm)caused by the aggregated luminescence of arginine on the side chains.Overall,this study highlights the potential application of CGP as a fluorescent material and offers insights into CGP recovery from activated sludge in wastewater treatment plants.

CyanophycinPolyhydroxyalkanoateAlginate-like exopolysaccharidesBioresource recoveryAggregation-induced luminescence

Kui Zou、Hongyuan Liu、Bo Feng、Taiping Qing、Peng Zhang

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College of Environment and Resources,Xiangtan University,Xiangtan 411105,China

国家自然科学基金湖南省自然科学基金湖南省自然科学基金湖南省自然科学基金Environmental Protection Research Project of Hunan Province,China

U22A206172021JJ306642022JJ305592022JJ50131HBKT-2022036

2024

10.1007/s11783-024-1776-7

环境科学与工程前沿
高等教育出版社

环境科学与工程前沿

影响因子：0.545
ISSN：2095-2201
年,卷(期)：2024.18(2)
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