Surfactant rhamnolipid promotes anaerobic codigestion of excess sludge and plant waste

In order to solve the bottleneck of low methane production in anaerobic codigestion of excess sludge (ES) and plant waste (PW), a new strategy of enhancing hydrolysis and acidification by rhamnolipid (RL) was proposed under thermophilic condition. The results showed that the optimal dosage of RL was...

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Autores principales: Yongliang Wang, Xiaohui Zhou, Bin Dai, Xiaoqiang Zhu
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Lenguaje:EN
Publicado: IWA Publishing 2021
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spelling oai:doaj.org-article:264e14b794604065b630de7f191575892021-11-23T18:41:04ZSurfactant rhamnolipid promotes anaerobic codigestion of excess sludge and plant waste0273-12231996-973210.2166/wst.2021.414https://doaj.org/article/264e14b794604065b630de7f191575892021-11-01T00:00:00Zhttp://wst.iwaponline.com/content/84/9/2519https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732In order to solve the bottleneck of low methane production in anaerobic codigestion of excess sludge (ES) and plant waste (PW), a new strategy of enhancing hydrolysis and acidification by rhamnolipid (RL) was proposed under thermophilic condition. The results showed that the optimal dosage of RL was 50 g/kg total suspended solids, and the maximum yield of methane was 198.5 mL/g volatile suspended solids (VSS), which was 2.3 times of that in the control. RL promoted the dissolution of organic matter in the codigestion process of ES and PW, and the higher the dosage of RL, the higher the concentration of soluble chemical oxygen demand (SCOD) in the fermentation broth. When RL was 100 g/kg, the maximum content of SCOD in fermentation broth was 2,451 mg/L, and the contents of soluble protein and polysaccharide were 593 mg/L and 419 mg/L on 10 d, respectively, which were significantly higher than other groups. In addition, the yield of VFA in RL group was also significantly increased, and acetate and propionate were the main components of VFAs. This research work provides data support for the resource utilization of ES and PW, and expands the application field of RL. HIGHLIGHTS Excess sludge and plant waste are codigested to produce methane.; Biosurfactant rhamnolipid enhanced the codigestion of ES and PW for methane production.; RL increased the release of dissolved organic matter in the codigestion system.; RL increased the accumulation of VFA during the codigestion of ES and PW.;Yongliang WangXiaohui ZhouBin DaiXiaoqiang ZhuIWA Publishingarticleanaerobic codigestionexcess sludgemethaneplant wastevolatile fatty acidsEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 9, Pp 2519-2529 (2021)
institution DOAJ
collection DOAJ
language EN
topic anaerobic codigestion
excess sludge
methane
plant waste
volatile fatty acids
Environmental technology. Sanitary engineering
TD1-1066
spellingShingle anaerobic codigestion
excess sludge
methane
plant waste
volatile fatty acids
Environmental technology. Sanitary engineering
TD1-1066
Yongliang Wang
Xiaohui Zhou
Bin Dai
Xiaoqiang Zhu
Surfactant rhamnolipid promotes anaerobic codigestion of excess sludge and plant waste
description In order to solve the bottleneck of low methane production in anaerobic codigestion of excess sludge (ES) and plant waste (PW), a new strategy of enhancing hydrolysis and acidification by rhamnolipid (RL) was proposed under thermophilic condition. The results showed that the optimal dosage of RL was 50 g/kg total suspended solids, and the maximum yield of methane was 198.5 mL/g volatile suspended solids (VSS), which was 2.3 times of that in the control. RL promoted the dissolution of organic matter in the codigestion process of ES and PW, and the higher the dosage of RL, the higher the concentration of soluble chemical oxygen demand (SCOD) in the fermentation broth. When RL was 100 g/kg, the maximum content of SCOD in fermentation broth was 2,451 mg/L, and the contents of soluble protein and polysaccharide were 593 mg/L and 419 mg/L on 10 d, respectively, which were significantly higher than other groups. In addition, the yield of VFA in RL group was also significantly increased, and acetate and propionate were the main components of VFAs. This research work provides data support for the resource utilization of ES and PW, and expands the application field of RL. HIGHLIGHTS Excess sludge and plant waste are codigested to produce methane.; Biosurfactant rhamnolipid enhanced the codigestion of ES and PW for methane production.; RL increased the release of dissolved organic matter in the codigestion system.; RL increased the accumulation of VFA during the codigestion of ES and PW.;
format article
author Yongliang Wang
Xiaohui Zhou
Bin Dai
Xiaoqiang Zhu
author_facet Yongliang Wang
Xiaohui Zhou
Bin Dai
Xiaoqiang Zhu
author_sort Yongliang Wang
title Surfactant rhamnolipid promotes anaerobic codigestion of excess sludge and plant waste
title_short Surfactant rhamnolipid promotes anaerobic codigestion of excess sludge and plant waste
title_full Surfactant rhamnolipid promotes anaerobic codigestion of excess sludge and plant waste
title_fullStr Surfactant rhamnolipid promotes anaerobic codigestion of excess sludge and plant waste
title_full_unstemmed Surfactant rhamnolipid promotes anaerobic codigestion of excess sludge and plant waste
title_sort surfactant rhamnolipid promotes anaerobic codigestion of excess sludge and plant waste
publisher IWA Publishing
publishDate 2021
url https://doaj.org/article/264e14b794604065b630de7f19157589
work_keys_str_mv AT yongliangwang surfactantrhamnolipidpromotesanaerobiccodigestionofexcesssludgeandplantwaste
AT xiaohuizhou surfactantrhamnolipidpromotesanaerobiccodigestionofexcesssludgeandplantwaste
AT bindai surfactantrhamnolipidpromotesanaerobiccodigestionofexcesssludgeandplantwaste
AT xiaoqiangzhu surfactantrhamnolipidpromotesanaerobiccodigestionofexcesssludgeandplantwaste
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