Abstract:
Background:With the further development of anaerobic digestion, an increasing output of anaerobically digested wastewater (ADW), which typically contained high concentrations of ammonium, phosphate, and suspended solids, was inevitable. Microalgae cultivation offered a potential waste-to-value strategy to reduce the high nutrient content in ADW and obtain high value-added microalgae. However, ADW generally contained a mass of pollutants (suspended solids, competitors, etc.), which could inhibit microalgae growth and even result in microalgae death by limiting light utilization. Thus, it is highly imperative to solve the problem by a novel modified photobioreactor for further practical applications. Results:Four microalgae species, Scenedesmus dimorphus, Scenedesmus quadricauda, Chlorella sorokiniana, and Chlorella vulgaris ESP-6, were cultivated in the membrane photobioreactor (MPBR) fed with ADW to investigate the efficiency of ammonia and phosphorus removal. The results showed that C. sorokiniana had the best performance for the removal of ammonia and phosphorus from ADW. The highest amount of C. sorokiniana biomass was 1.15 g/L, and the removal efficiency of phosphate (66.2%) peaked at an ammonia concentration of 128.5 mg/L after 9 days' incubation. Moreover, the MPBR with 0.1 μm membrane pore size had the best ammonia and phosphate removal efficiencies (43.9 and 64.9%) at an ammonia concentration of 128.5 mg/L during 9 days' incubation. Finally, the continuous multi-batch cultivation of C. sorokiniana was performed for 45 days in MPBR, and higher removal ammonia amount (18.1 mg/day) and proteins content (45.6%) were obtained than those (14.5 mg/day and 37.4%) in an normal photobioreactor. Conclusion:In this study, a novel MPBR not only eliminated the inhibitory effects of suspended solid and microorganisms, but also maintained a high microalgae concentration to obtain a high amount of ammonia and phosphate removal. The research provided a theoretical foundation for the practical application of MPBRs in various wastewater treatment schemes without pretreatment by algae, which could be used as biofuels or protein feed.
journal_name
Biotechnol Biofuelsjournal_title
Biotechnology for biofuelsauthors
Chen X,Li Z,He N,Zheng Y,Li H,Wang H,Wang Y,Lu Y,Li Q,Peng Ydoi
10.1186/s13068-018-1190-0subject
Has Abstractpub_date
2018-07-09 00:00:00pages
190issn
1754-6834pii
1190journal_volume
11pub_type
杂志文章abstract:BACKGROUND:In general, biofuel production involves biomass pretreatment and enzymatic saccharification, followed by the subsequent sugar conversion to biofuel via fermentation. The crucial step in the production of biofuel from biomass is the enzymatic saccharification. Many of the commercial cellulase enzyme cocktails...
journal_title:Biotechnology for biofuels
pub_type: 杂志文章
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journal_title:Biotechnology for biofuels
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journal_title:Biotechnology for biofuels
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journal_title:Biotechnology for biofuels
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journal_title:Biotechnology for biofuels
pub_type: 杂志文章
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journal_title:Biotechnology for biofuels
pub_type: 杂志文章
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journal_title:Biotechnology for biofuels
pub_type: 杂志文章
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journal_title:Biotechnology for biofuels
pub_type: 杂志文章
doi:10.1186/1754-6834-6-28
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journal_title:Biotechnology for biofuels
pub_type: 杂志文章
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pub_type: 杂志文章
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journal_title:Biotechnology for biofuels
pub_type: 杂志文章
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更新日期:2018-01-08 00:00:00
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journal_title:Biotechnology for biofuels
pub_type: 杂志文章
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更新日期:2013-11-29 00:00:00
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journal_title:Biotechnology for biofuels
pub_type: 杂志文章
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更新日期:2019-06-08 00:00:00
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journal_title:Biotechnology for biofuels
pub_type: 杂志文章
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更新日期:2019-04-01 00:00:00
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journal_title:Biotechnology for biofuels
pub_type: 杂志文章
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更新日期:2016-10-18 00:00:00
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journal_title:Biotechnology for biofuels
pub_type: 杂志文章
doi:10.1186/1754-6834-5-29
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journal_title:Biotechnology for biofuels
pub_type: 杂志文章
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更新日期:2014-10-18 00:00:00
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journal_title:Biotechnology for biofuels
pub_type: 杂志文章
doi:10.1186/1754-6834-5-83
更新日期:2012-11-22 00:00:00
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journal_title:Biotechnology for biofuels
pub_type: 杂志文章
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更新日期:2013-11-29 00:00:00