FOG is a result of cooking foods like meat, dairy, and vegetable oils. FOG can infiltrate the sewer system when food service establishments including restaurants, takeout, and bars clean their facilities.
FOG can easily enter sinks and drains when it's hot, but as soon as it cools down, it hardens, obstructing and harming sewer lines and creating issues with the wastewater treatment process.
How to control Fat, Oil and Grease in Wastewater treatment?
1- Elimination at the source
The best strategy is to combat FOG at its source. To eliminate FOG from the restaurant's sullage, many food service establishments install a passive grease interceptor unit in the greywater outlet.
It is necessary to appropriately dispose of the brown grease that has gathered in the trap or GI. In order for grease interceptors to work effectively, they must be regularly cleaned and emptied.
2- Drain cleaning
If it has been collected in the sewer system, it needs to be manually removed. The locations will be more susceptible to FOG clogs, due to their proximity to residential, commercial, or industrial districts, the features of the sewer pipe, such as its diameter or condition, and the characteristics of the sewer network, such as the number of inflows and effluent volume.
Manual collection, which needs a lot of people and involves health and safety issues, may be the only choice when pipe repairs or modifications, to cleaning and maintenance are inadequate.
3- Removal at the Wastewater Treatment Plant
At wastewater treatment facilities, FOG elimination has traditionally involved the use of biological agents, to break down and consume grease build-up. The procedure of "bioaugmentation" involves releasing the binding between glycerol and fatty acids, using bacteria-forming enzymes.
After that, these substances can be eliminated through biodegradation, a process in which bacteria and other microorganisms consume wastes made of starch, sugar, and fat. Regular injections of specialized organisms are often required for long-term bioaugmentation, since foreign organisms cannot keep up with the system's primary population.
Techniques for getting rid of FOG
While, biological techniques are more frequently employed to remove soluble chemicals, gravity separation is frequently used to eliminate insoluble FOG. Before biological treatment, dissolved air flotation (DAF) along with coagulation and flocculation, is a typical pretreatment to minimize FOG load.
Using iron chloride or aluminium polychloride, colloids are destabilized and broken down into tiny particles in DAF. Polyelectrolytes next cause the particles to agglomerate into bigger "flocs." The addition of air bubbles causes the flocs to stick to one another and float to the surface. The top sludge is then mechanically scraped.
Other techniques employed include
• Alum and ferric chloride coagulation
• Hydrochloric acid or sulphuric acid treatment at pH 3
• Membrane and activated sludge treatments, which are frequently coupled
• Anaerobic sludge blanket with up-flow (UASB)
• Adsorption
• Radioactive particles
Conclusion
Despite the fact that heavy FOG poses many difficulties for wastewater treatment, it does have one benefit: due to its high organic load, it is perfect for waste-to-energy systems.
Wastewater from food production can include ten times as much organic material, as typical municipal wastewater, which already contains around five times as much energy as is needed to remediate it. Wastewater treatment via anaerobic digestion (AD) results in the production of biogas, which can be sold or used to power operations.
How can we assist?
For better solutions for water and wastewater treatment, you should turn to Netsol Water. We provide a wide variety of items, many of which can be altered to suit the demands of our clients. We can provide solutions that are both inexpensive and trouble-free.
Years of experience in the deployment of DAF, biological, membrane, and waste-to-energy systems, have been accumulated by Netsol Water Solutions. Get in touch with us to discuss a FOG removal procedure designed to meet the unique wastewater stream, and legal requirements of your organization.
Netsol Water is Greater Noida-based leading water & wastewater treatment plant manufacturer. We are industry's most demanding company based on client review and work quality. We are known as best commercial RO plant manufacturers, industrial RO plant manufacturer, sewage treatment plant manufacturer, Water Softener Plant Manufacturers and effluent treatment plant manufacturers. Apart from this 24x7 customer support is our USP. Call on +91-9650608473, or write us at enquiry@netsolwater.com for any support, inquiry or product-purchase related query.