Cultivation of energy microalga Chlorella vulgaris with low–toxic sludge extract

Chlorella vulgaris was cultivated in different proportions of activated sludge extracts, which was from the treatment of synthetic wastewater containing tetrachlorophenol. The growth period of C. vulgaris could be shortened for about 10 days when sludge extract was mixed into BG11 culture substrate,...

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Autores principales: Xiurong Chen, Shanshan Wang, Xiaoli Sun, Quanling Lu
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Publicado: IWA Publishing 2021
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spelling oai:doaj.org-article:b1695e607c334c3c8cfc653ba354dd3c2021-11-06T10:47:56ZCultivation of energy microalga Chlorella vulgaris with low–toxic sludge extract0273-12231996-973210.2166/wst.2021.020https://doaj.org/article/b1695e607c334c3c8cfc653ba354dd3c2021-02-01T00:00:00Zhttp://wst.iwaponline.com/content/83/4/818https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732Chlorella vulgaris was cultivated in different proportions of activated sludge extracts, which was from the treatment of synthetic wastewater containing tetrachlorophenol. The growth period of C. vulgaris could be shortened for about 10 days when sludge extract was mixed into BG11 culture substrate, and the growth of C. vulgaris was promoted during the period of adaptation and logarithmic period. In the stable and decay period, when the proportion of sludge extract increased to 50%, cell proliferation was inhibited. There was an evident positive correlation between the total and average amount of starch polysaccharide with sludge concentration. When C. vulgaris was cultivated with pure sludge extracts, the total amount of starch and polysaccharide was up to 103 and 125 mg/L. Therefore, the low-toxic sludge extracts were more beneficial to the accumulation of carbohydrates. In the 100% sludge extracts culture medium, chlorophyll-a in C. vulgaris was accumulated to 30.2 mg/L on the 25th day. Through the analysis of algal cells' ultrastructures, it was shown that the photosynthesis was strengthened greatly with low-toxic sludge extracts. The results show that the rich heterotrophic carbon source in the sludge extract can be used as an excellent medium for Chlorella. It provides new ideas for the harmless utilization of surplus sludge as a resource. At the same time, the use of nutrients in the sludge extract to cultivate Chlorella is of great significance to low-cost algae cultivation.Xiurong ChenShanshan WangXiaoli SunQuanling LuIWA Publishingarticlecarbohydrateschlorella vulgarisfull life cyclelow-toxic sludge extractphotosynthesisEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 83, Iss 4, Pp 818-830 (2021)
institution DOAJ
collection DOAJ
language EN
topic carbohydrates
chlorella vulgaris
full life cycle
low-toxic sludge extract
photosynthesis
Environmental technology. Sanitary engineering
TD1-1066
spellingShingle carbohydrates
chlorella vulgaris
full life cycle
low-toxic sludge extract
photosynthesis
Environmental technology. Sanitary engineering
TD1-1066
Xiurong Chen
Shanshan Wang
Xiaoli Sun
Quanling Lu
Cultivation of energy microalga Chlorella vulgaris with low–toxic sludge extract
description Chlorella vulgaris was cultivated in different proportions of activated sludge extracts, which was from the treatment of synthetic wastewater containing tetrachlorophenol. The growth period of C. vulgaris could be shortened for about 10 days when sludge extract was mixed into BG11 culture substrate, and the growth of C. vulgaris was promoted during the period of adaptation and logarithmic period. In the stable and decay period, when the proportion of sludge extract increased to 50%, cell proliferation was inhibited. There was an evident positive correlation between the total and average amount of starch polysaccharide with sludge concentration. When C. vulgaris was cultivated with pure sludge extracts, the total amount of starch and polysaccharide was up to 103 and 125 mg/L. Therefore, the low-toxic sludge extracts were more beneficial to the accumulation of carbohydrates. In the 100% sludge extracts culture medium, chlorophyll-a in C. vulgaris was accumulated to 30.2 mg/L on the 25th day. Through the analysis of algal cells' ultrastructures, it was shown that the photosynthesis was strengthened greatly with low-toxic sludge extracts. The results show that the rich heterotrophic carbon source in the sludge extract can be used as an excellent medium for Chlorella. It provides new ideas for the harmless utilization of surplus sludge as a resource. At the same time, the use of nutrients in the sludge extract to cultivate Chlorella is of great significance to low-cost algae cultivation.
format article
author Xiurong Chen
Shanshan Wang
Xiaoli Sun
Quanling Lu
author_facet Xiurong Chen
Shanshan Wang
Xiaoli Sun
Quanling Lu
author_sort Xiurong Chen
title Cultivation of energy microalga Chlorella vulgaris with low–toxic sludge extract
title_short Cultivation of energy microalga Chlorella vulgaris with low–toxic sludge extract
title_full Cultivation of energy microalga Chlorella vulgaris with low–toxic sludge extract
title_fullStr Cultivation of energy microalga Chlorella vulgaris with low–toxic sludge extract
title_full_unstemmed Cultivation of energy microalga Chlorella vulgaris with low–toxic sludge extract
title_sort cultivation of energy microalga chlorella vulgaris with low–toxic sludge extract
publisher IWA Publishing
publishDate 2021
url https://doaj.org/article/b1695e607c334c3c8cfc653ba354dd3c
work_keys_str_mv AT xiurongchen cultivationofenergymicroalgachlorellavulgariswithlowtoxicsludgeextract
AT shanshanwang cultivationofenergymicroalgachlorellavulgariswithlowtoxicsludgeextract
AT xiaolisun cultivationofenergymicroalgachlorellavulgariswithlowtoxicsludgeextract
AT quanlinglu cultivationofenergymicroalgachlorellavulgariswithlowtoxicsludgeextract
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