Solid Waste Treatment using Plasma Technology is an extreme thermal process using plasma which converts organic matter into a syngas (synthesis gas) which is primarily made up of hydrogen and carbon monoxide. A plasma torch powered by an electric arc, is used to ionize gas and catalyze organic matter into syngas with slag remaining as a byproduct. It is used commercially as a form of waste treatment and has been tested for the gasification of Municipal solid waste, biomass, industrial waste, hazardous waste, and solid hydrocarbons, such as coal, oil sands, petcoke and oil shale
Plasma gasification system facilitates safe disposal of all type of organic wastes. The inorganic materials like glass, metals can also be minimized to slag. In plasma pyrolysis the most likely compounds which are produced include carbonaceous matter, methane, carbon monoxide, hydrogen, carbon dioxide and water molecules. These product gases are combustible. These can be either combusted or used as a heating source. The exhaust gases generated on combusting the product gases include CO2, N2, H2O.The product gases recovered has calorific and commercial values. These gases can be used as a heat source or as fuel. The amount of gas recovered depends solely upon type of waste and amount of waste. As the system can recover energy from the waste while safely disposing it, plasma pyrolysis can be treated as the ultimate waste management and recycling technology.
Benefits of PPS:
1. Energy recovery from waste depending upon input waste calorific value.
2. PPS can decompose any type of organic waste negating the requirement of pre processing or treatment.
3. Sterilization of residue
4. The system is compact as compared to other waste disposal facilities.
5. Recovers significant amount of energy in form of combustible gases with safe disposal of waste.
6. It is independent of waste characteristics provided it is organic in nature.
7. PPS facilitates elimination of carbon content in the waste.
8. The ash content does not require any post treatment.
9. Requires less time to preheat the pyrolysis reactor.
10. PPT can even be used to destroy (i) Metallized plastics (ii) Polyethylene plastic (iii) 80%Polyethylene 20% PVC (iv) Soiled plastic, (v) 50% Polyethylene 50% PVC and (vi) Multi-layer plastics in an environment friendly manner
Applicable Fields :
11. Sugar mills(Energy recovery from bagasse)
12. Petrochemical companies and refineries (Tar sand & waste oil).
13. Agro Industries(Energy recovery from agro waste such as groundnut shell, bagasse, Cotton stalk, coffee husk, rice husk, paddy husk etc.)
14. Municipal corporations
15. Trusts collecting floral waste.
16. Hospitals
17. FMCG companies
18. Slaughter houses.
19. Animal waste disposing
20. The plasma pyrolysis systems can be installed in tourist/hilly locations in the country where disposal of plastic bags, metallized pouches, bottles etc. is a matter of concern and significant transportation cost could be saved.
Advanced oxidation processes (abbreviation: AOPs), in a broad sense, are a set of chemical treatment procedures designed to remove organic (and sometimes inorganic) materials in water and wastewater by oxidation through reactions with hydroxyl radicals (·OH). In real-world applications of wastewater treatment, however, this term usually refers more specifically to a subset of such chemical processes that employ ozone (O3), hydrogen peroxide (H2O2) and/or UV light.One such type of process is called in situ chemical oxidation.
APPLICATIONs OF AOPs:-
COD removal of complex / recalcitrant organic compounds presents in wastewaters
Color and odor removal
Post-treatment option for residual COD, toxicity and color reduction
Sludge treatment such as enhancement of sludge dewatering capacity
Pre-treatment option for BOD enhancement
