Influence of bionanoparticles to treat a slaughterhouse wastewater

Treatment of effluents from animal slaughterhouse industries is indispensable, standing out coagulation/flocculation/sedimentation processes. Bionanoparticles (BioNPs) (nanoparticles (NPs) functionalized with Moringa extracts (MO)) were studied as an alternative natural coagulant that would contribu...

Full description

Saved in:
Bibliographic Details
Published in:Environmental technology 2022-12, Vol.43 (28), p.4528-4544
Main Authors: Antunes, Aline dos Santos, Triques, Carina Contini, Buzanello-Martins, Cleide Viviane, Mateus, Gustavo Affonso Pisano, Bergamasco, Rosangela, Fagundes-Klen, Márcia Regina
Format: Article
Language:English
Subjects:
Abattoirs
Bioindicators
Bionanoparticles
Calcium chloride
Coagulants
Coagulation
coagulation/flocculation
Effluent treatment
Effluents
Flocculation
Heterotrophic microorganisms
Indicator species
Lactuca sativa
Magnetic fields
Mesophiles
microbial load
Microorganisms
Moringa seeds
Nanoparticles
Reduction
Reuse
Sedimentation
Sedimentation & deposition
slaughterhouse wastewater
Sustainability
Toxicity
Toxicity testing
Turbidity
Wastewater treatment
Yeasts
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Treatment of effluents from animal slaughterhouse industries is indispensable, standing out coagulation/flocculation/sedimentation processes. Bionanoparticles (BioNPs) (nanoparticles (NPs) functionalized with Moringa extracts (MO)) were studied as an alternative natural coagulant that would contribute to the microbial load reduction, without increasing the treated effluent toxicity. MO extracts were prepared with different salts, and then, in a kinetics study, different NPs mass and coagulant dosages were evaluated. In the best-defined conditions, microbial load, toxicity tests for the bioindicator Lactuca sativa, and NPs reuse evaluation were performed. Removals of 96.14% turbidity and 43.63% UV 254nm were achieved when using 500 mg L −1 of BioNPs containing 60 mg of NPs for every 20 mL of MO extract prepared with 0.1 M CaCl 2 . The BioNPs with an external magnetic field also decreased the sedimentation time from 140 to 10 min compared to MO, and the process efficiency did not expressively decrease after reusing the recovered NPs. Through toxicity tests, BioNPs were not considered to leave residuals toxic to the Lactuca sativa in the treated effluent. Besides, the microbial load reduction was 97.33% for heterotrophic microorganisms and total mesophiles and 99.25% for moulds/yeasts. Therefore, a satisfactory primary treatment was achieved, contributing to the sustainability of industries.
ISSN:0959-3330
1479-487X
DOI:10.1080/09593330.2021.1955016