Systematic Review of Poultry Slaughterhouse Wastewater Treatment: Unveiling the Potential of Nanobubble Technology

Author:

Kaskote Ephraim1,Basitere Moses2,Mshayisa Vusi Vincent3ORCID,Sheldon Marshall Sheerene4ORCID

Affiliation:

1. Bioresource Engineering Research Group, Department of Chemical Engineering, Faculty of Engineering and the Built Environment, Cape Peninsula University of Technology, P.O. Box 652, Cape Town 8000, South Africa

2. Academic Support Programme for Engineering in Cape Town (ASPECT), Centre for Higher Education Development, University of Cape Town, Rondebosch, Cape Town 7700, South Africa

3. Department of Food Science and Technology, Cape Peninsula University of Technology, Bellville 7535, South Africa

4. Faculty of Engineering, the Built Environment, and Technology, Nelson Mandela University, Gqeberha 6001, South Africa

Abstract

Aeration is crucial for the biological decomposition of organic compounds in wastewater treatment. However, it is a highly energy-intensive process in traditional activated sludge systems, accounting for 50% to 75% of a plant’s electricity consumption and making it a major cost driver for wastewater treatment plants. Nanobubbles (NBs), characterized by their tiny size with diameters less than 200 nm, have emerged as a potential alternative to the low efficiency of aeration and high sludge production in aeration systems. NBs proved effective in removing COD and other pollutants from wastewater. For example, when applied in flotation, aeration, and advanced oxidation, NBs achieved up to 95%, 85%, and 92.5% COD removal, respectively. Considering the recent advancements in wastewater treatment, a compelling need arises for a thorough investigation of the effectiveness and mechanisms of nanobubbles in this field. This systematic review summarizes recent advancements in understanding nanobubbles (NBs) and their unique properties that enhance physical, chemical, and biological water and wastewater treatment processes. Moreover, this study reviews various methods for generating NBs and provides an in-depth review of their applications in wastewater treatment, with a particular focus on poultry slaughterhouse wastewater (PSW) treatment.

Funder

National Research Foundation

Thuthuka Funding& Black Academic Advancement Program (BAAP) Funding

Cape Peninsula University of Technology University Research Fund

Publisher

MDPI AG

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