| Literature DB >> 31344632 |
Huan Li1, Yun Zhang1, Jiuyi Liu1, Zhensheng Shen1, An Li2, Tian Ma1, Qian Feng3, Yingqiang Sun4.
Abstract
The aim of this work was to study the biotreatment of mixed wastewaters collected from two points of MnO2 industry by Chlorella vulgaris. Their growth rates in four mixed wastewaters with mass ratio of wastewater 1#:2# of 20:1, 50:1, 100:1, and 200:1 were characterized, and the lag phase was shortened with increase of nitrate concentrations. The N, P, and metal removal kinetics were quantified each other day to evaluate the bio-treatment efficiencies of high-nitrate wastewaters from MnO2 industry. 84.68% and 98% of N, P has been removed. The Ca, Zn, Mn, and Si in mixed wastewaters was removed with maximum removal efficiencies of 97.91%, 99.37%, 99.44%, and 81.68%, respectively. The compositions of Chlorella vulgaris cultured in mixed wastewaters, including proteins, lipids, ash contents, and carbohydrates, were investigated in detail. The optimum HHV of Chlorella vulgaris about 18 MJ/Kg presented a potential to decrease the cost of algal biofuel.Entities:
Keywords: Biological treatment; Chlorella vulgaris; High-nitrate wastewater; MnO(2) industry
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Year: 2019 PMID： 31344632 DOI： 10.1016/j.biortech.2019.121836
Source DB: PubMed Journal: Bioresour Technol ISSN： 0960-8524 Impact factor: 9.642