Tertiary treatment of dairy industry wastewater with production of Chlorella vulgaris biomass: evaluation of effluent dilution
| Autor: | Ivan Venâncio de Oliveira Nunes, Carina Harue Bastos Inoue, Ana Elisa Rodrigues Sousa, João Carlos Monteiro de Carvalho, Andreia Maria da Anunciação Gomes, Marcelo Chuei Matsudo |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Revista Brasileira de Ciências Ambientais, Vol 56, Iss 2, Pp 365-373 (2021) |
| Druh dokumentu: | article |
| ISSN: | 1808-4524 2176-9478 21769478 |
| DOI: | 10.5327/Z21769478787 |
| Popis: | Secondary wastewaters from the dairy industry may cause eutrophication of water bodies when not properly treated, mainly because they contain nutrients such as phosphorus and nitrogen. Tertiary treatment using microalgae could be an adequate solution for Minas Gerais State, the largest Brazilian milk producer, contributing to the reduction of environmental impacts, as well as providing biomass for oil extraction, and obtaining active compounds and inputs (including proteins) for animal feeding. In this work, dilutions (with distilled water) of the secondary wastewater from the dairy industry were evaluated to cultivate Chlorella vulgaris in a bench-scale tubular photobioreactor. Theresults indicate the feasibility of using wastewater from the dairy industry, after secondary treatment, to cultivate microalgae, showing cell growth like that obtained in control cultures (Bold basal medium). The secondary wastewater without dilution (100% wastewater) provided the best condition for biomass production. The biomass obtained in wastewater showed no differences from the biomass obtained in the Bold basal medium (control) in terms of protein, lipid content, or fatty acid profile. |
| Databáze: | Directory of Open Access Journals |
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