Details

Autor(en) / Beteiligte

• Terán Hilares, Ruly
• Garcia Bustos, Kiara A.
• Sanchez Vera, Fabio P.
• Colina Andrade, Gilberto J.
• Pacheco Tanaka, David A.

Titel

Acid precipitation followed by microalgae (Chlorella vulgaris) cultivation as a new approach for poultry slaughterhouse wastewater treatment

Ist Teil von

• Bioresource technology, 2021-09, Vol.335, p.125284-125284, Article 125284

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •About 80% of CODT was removed from PSW by acid precipitation at pH 4.•PSW treated by acid precipitation was used as medium for microalgae cultivation.•Microalgae cultivation in a continuous mode remove 83% of residual COD from PSW.•The water obtained after membrane filtration allows safe disposal. Poultry slaughterhouse wastewater (PSW) contains high organic matter and nutrients requiring thus a special treatment before its final disposal. In this work, acid precipitation (H2SO4) followed by microalgae “Chlorella vulgaris” cultivation both in batch and continuous processes was studied as an alternative method for PSW treatment. By reducing the pH value of PSW from 6 to 7 to 4, about 80% of the total chemical oxygen demand (CODT) was removed as sludge. In the supernatant, the COD residual was efficiently removed (83%) by microalgae in the batch process, using an internal-loop concentric tube photobioreactor (4.5 L). Moreover, in continuous process, after 89 h, the COD value resulted lower than 200 mg L-1 and 1.2 g L-1 of microalgae in the output line. The proposed PSW treatment method is promising from economic and environmental viewpoints, since the microalgal biomass can be valued in a biorefinery context.