ENHANCEMENT AND MECHANISM OF MIXED ALGAE CULTIVATION FOR TREATMENT OF KITCHEN WASTE DIGESTATE EFFLUENT

LIU Yan; YANG Min; CHEN Hong; JIANG Zhao-hui; ZHAO Wen-yu; WANG Hong; ZHANG Jun-ya

doi:10.13205/j.hjgc.202103008

Volume 39 Issue 3

Jul. 2021

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LIU Yan, YANG Min, CHEN Hong, JIANG Zhao-hui, ZHAO Wen-yu, WANG Hong, ZHANG Jun-ya. ENHANCEMENT AND MECHANISM OF MIXED ALGAE CULTIVATION FOR TREATMENT OF KITCHEN WASTE DIGESTATE EFFLUENT[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(3): 54-60,67. doi: 10.13205/j.hjgc.202103008

Citation:

LIU Yan, YANG Min, CHEN Hong, JIANG Zhao-hui, ZHAO Wen-yu, WANG Hong, ZHANG Jun-ya. ENHANCEMENT AND MECHANISM OF MIXED ALGAE CULTIVATION FOR TREATMENT OF KITCHEN WASTE DIGESTATE EFFLUENT[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(3): 54-60,67. doi: 10.13205/j.hjgc.202103008

Citation:

LIU Yan, YANG Min, CHEN Hong, JIANG Zhao-hui, ZHAO Wen-yu, WANG Hong, ZHANG Jun-ya. ENHANCEMENT AND MECHANISM OF MIXED ALGAE CULTIVATION FOR TREATMENT OF KITCHEN WASTE DIGESTATE EFFLUENT[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(3): 54-60,67. doi: 10.13205/j.hjgc.202103008

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ENHANCEMENT AND MECHANISM OF MIXED ALGAE CULTIVATION FOR TREATMENT OF KITCHEN WASTE DIGESTATE EFFLUENT

doi: 10.13205/j.hjgc.202103008

LIU Yan^1,2,
YANG Min^{1,2,3
,
,},
CHEN Hong²,
JIANG Zhao-hui^1,2,
ZHAO Wen-yu^1,2,
WANG Hong²,
ZHANG Jun-ya³

1. School of Chemical and Food Engineering, Changsha University of Science and Technology, Hunan, Changsha 410114, China;
2. Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha University of Science and Technology, Changsha 410114, China;
3. Chinese Academy of Sciences, Center for Eco-Environmental Research, Beijing 100085, China

Received Date: 2020-03-08
Available Online: 2021-07-19

Abstract

Abstract

The use of microalgae mixed culture for the treatment of kitchen wastes digestate effluent has the advantages of efficient carbon fixation and denitrification. However, the preferred mixed culture ratio and synergistic enhancement mechanism are still unclear. In this study, the growth characteristics of microalgae and efficiency of digestate effluent treatment of Chlorella vulgaris, Scenedesmus obliquus, and Haematococcus pluvislis in single and mixed culture modes were compared. The stimulation effect of the soluble algae products (SAP) on microalgae growth and the synergistic mechanism of competition between different microalgae were studied. The mixture cultivation of Scenedesmus obliquus and Haematococcus pluvialis was the optimized match with maximum biomass of 0.655 g/L, COD removal rate of 76.2% and NH₄⁺-N removal rate of 60.1%. Interspecific SAPs produced by Haematococcus pluvialis and Scenedesmus obliquus could be consumed as an allelo-chemicals by each other, following by the hormesis effect, and the two microalgae had different assimilation abilities onto different pollutants, forming a synergistic competition to alleviate the inhibition of high concentration wastewater and SAP generated by themselves. This mechanism of synergistic competition could explain the reason why mixed culture of microalgae increased biomass yield and enhanced the treatment of kitchen waste digestate effluent.
- microalgae,
- kitchen waste digestate effluent,
- mixed culture,
- soluble algae product

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References(31)

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