Year: 2024
Type: article
Abstract: The effluents of a variety of industrial or commercial activities that include Oil and Grease OG were continuously seen as negative inputs for the receiving bodies that deteriorate their quality or the tentative efficiency. From the other hand and as economy is the major cart for such activities, the energy potential in these OG contents makes it a tempting goal to extract and reuse OG as an energy source whether inside the location or supplied to the market wherever needed. The goal of OG removal and their extraction as a source for biogas production is tested for the aqueous effluent of a vegetable oils and detergents factory via a laboratory-built system that consists of a pressurized flotation basin for the OG extraction from the aqueous industrial effluent via the induced micro-sized air bubbles, that are generated by type RC2, 217 W pressure regulator installed on a 0.75 KW single phase compressor. The skimmed OG is then directed to a 20 l working volume closed cylindrical bio digester to disintegrate the Carbon-Hydrogen bonds anaerobically under controlled thermal environment. Five digesters are built including single phase BG-3D-1 dual impellers rotary mixer and digital thermostat 8820 NTC sensor temperature controller to adjust the temperature of an interior coil heater to examine the impacts of operational time and temperature on the digestion performance for various OG: inoculum ratios and hence determine the performance indicators of the digesters. The chemical oxygen demand COD as the major environmental index in this regard, is determined to yield a reduction of 90.8% of its initial concentration, by the end of operating the bioreactor that worked for a 30 consecutive days at a temperature of 60 ˚C. That is in addition to the production of biogas in about 8.4 l/d (in a daily average of 3.64 l), for a mixture of 5:10 l extracted OG and livestock manure inoculum. These results declare the significant role of installing the suggested anaerobic digester in parallel to the industrial production lines to serve a reduction in overall operational costs via the removal of OG load from the final wastewater treatment plants and the revenue of the produced biogas as an energy source.
Institutions: Iraqi University, Middle Technical University
Language: English
Subfield: Building and Construction
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4406683083