Improved growth of bait microalgae Isochrysis and aquacultural wastewater treatment with mixotrophic culture.

Ruirui Chu, Jingxue Ma, Chengxu Zhou, Defu Liu, Guangce Wang, Roger Ruan, Yandu Lu, Xiaojun Yan, Pengfei Cheng

Journal: Bioprocess and biosystems engineering 2022;45(3):589-597

PMID: 34994848

Abstract

This research of mixotrophic microalgae Isochrysis 3011 with glycerol was combined with the treatment of aqua-cultural wastewater, different initial concentrations, and optimized light intensities. The algae growth rate, removal efficiencies of total nitrogen (TN) and total phosphorus (TP) were determined. Results showed that the suitable initial concentration was 0.4 g L, and the optimum light intensity was 60 µmol m s. The growth of the mixotrophic group was better than that of the autotrophic culture. The biomass yield of the mixotrophic group with glycerol was 0.17 g L d, and the removal rates of TN and TP were 73.39% and 95.61%, respectively. The content of total lipid and total protein in mixotrophic group were higher than the values of the autotrophic group. This indicates that aquaculture wastewater treatment with mixotrophic bait microalgae can obtain superior micro-algal biomass, which is also a potential technology for wastewater utilization and ecological protection.

Address: College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, 315211, Zhejiang, China.; State Key Laboratory of Marine Resource Utilization in South China Sea, College of Oceanology, Hainan University, Haikou, 570228, Hainan, China.; School of Resource and Environmental Engineering, Hubei University of Technology, Wuhan, Hubei, China.; Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China.; Center for Biorefining, Department of Bioproducts and Biosystems Engineering, University of Minnesota-Twin Cities, Saint Paul, MN, 55108, USA.; State Key Laboratory of Marine Resource Utilization in South China Sea, College of Oceanology, Hainan University, Haikou, 570228, Hainan, China. [email protected].; Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Ningbo, 315211, Zhejiang, China.; College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, 315211, Zhejiang, China. [email protected].

DOI: 10.1007/s00449-021-02681-w

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https://dx.doi.org/10.1007/s00449-021-02681-w

MeSH Terms: Aquaculture, Biomass, Haptophyta, Microalgae, Nitrogen, Wastewater, Water Purification