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dc.contributor.authorWang, Qilin
dc.contributor.authorGong, Yanyan
dc.contributor.authorLiu, Sitong
dc.contributor.authorWang, Dongbo
dc.contributor.authorLiu, Ranbin
dc.contributor.authorZhou, Xu
dc.contributor.authorNghiem, Long D
dc.contributor.authorZhao, Yaqian
dc.description.abstractMicroalgae are third generation feedstocks for bio-hydrogen production to achieve a low carbon economy. Nevertheless, the bio-hydrogen production from microalgae is generally low. In this study, an innovative free ammonia (FA, i.e., NH 3 ) pretreatment technology was first demonstrated to improve bio-hydrogen production from the secondary effluent cultivated microalgae during the anaerobic dark fermentation experiments. Scanning electron microscopy revealed that FA pretreatment disrupted microalgae surface morphology. The soluble chemical oxygen demand (SCOD) release increased from 0.01 g SCOD/g VS microalgae (VS = volatile solids) to 0.05-0.07 g SCOD/g VS microalgae after FA pretreatment of 240-530 mg NH 3 -N/L for 1 day, indicating the enhanced microalgae solubilization. Dark fermentation bio-hydrogen potential experiments showed that bio-hydrogen production from microalgae was substantially improved following FA pretreatment of 240-530 mg NH 3 -N/L. The bio-hydrogen production potential and maximum bio-hydrogen production rate increased from 18.2 L H 2 /kg VS microalgae and 2.5 L H 2 /kg VS microalgae/d to 19.9-22.1 L H 2 /kg VS microalgae and 3.1-3.8 L H 2 /kg VS microalgae/d, respectively, after FA pretreatment of 240-530 mg NH 3 -N/L was implemented on the microalgae for 1 day. This FA technology follows a circular economic model because the required FA is from the FA rich dark fermentation liquid, which is a wastewater treatment waste.en_US
dc.publisherAmerican Chemical Society (ACS Publications)en_US
dc.relation.ispartofjournalACS Sustainable Chemistry & Engineeringen_US
dc.subject.fieldofresearchAnalytical Chemistryen_US
dc.subject.fieldofresearchOther Chemical Sciencesen_US
dc.subject.keywordsScience & Technologyen_US
dc.subject.keywordsPhysical Sciencesen_US
dc.subject.keywordsChemistry, Multidisciplinaryen_US
dc.subject.keywordsGreen & Sustainable Science & Technologyen_US
dc.titleFree Ammonia Pretreatment To Improve Bio-hydrogen Production from Anaerobic Dark Fermentation of Microalgaeen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Articlesen_US
dcterms.bibliographicCitationWang, Q; Gong, Y; Liu, S; Wang, D; Liu, R; Zhou, X; Nghiem, LD; Zhao, Y, Free Ammonia Pretreatment To Improve Bio-hydrogen Production from Anaerobic Dark Fermentation of Microalgae, ACS Sustainable Chemistry & Engineering, 2019, 7 (1), pp. 1642-1647en_US
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gro.griffith.authorWang, Qilin

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