Research
Experimental Analysis of Ionic Iron Compounds on Post-Coagulation Floc Settlement under the Presence of Magnetic field in Fly-Ash Media
The most abundant and one of the most precious resources (fresh water) for the Survival of life is on the verge of depletion. Hence various treatment processes to treat wastewater have and are being researched. Speaking about waste, another recent waste comes into the picture which is available in abundance and easily accessible commonly known as Flyash. Multiple research have been done in order to utilize the components of fly ash for removal of heavy metal like Arsenic, Cadmium, and Nickle etc. for the past years. This paper is based on the idea of utilization of the magnetic property of the Nano iron particles (Fe2+ & Fe3+) present in the fly ash as Fe2O3, as well as the adsorption capacity of the carbon particles present in the fly ash. Magnetic field induced treatment process with flyash as a media lead to a decrease in the settlement time of the floc produced after media mix to 35 seconds in 1000ml of Wastewater sample with a fly ash concentration of 12 g/l. Turbidity removal was 95% at variable settlement time. Usually prologed settlement time lead to better result for turbidity removal due to carbon adsorption. The raw water used for the experiment was obtained from multiple educational institutions in Ahmedabad & Gandhinagar regions, having various organic and inorganic concentrations in raw form. This raw sewage water initially having an over range turbidity (>2000NTU) which was reduced to a limit of 50 to 100 NTU on introducing flyash into the medium which acted as a natural coagulative. During the Cogulative process the Ion’s Fe2+ & Fe3+ gets confined with floc particles and these floc’s with ionic iron settles at a faster rate in the presence of established magnetic field. Atomic spectrometric test for Fe+ ions gave results with slight decrease in the Fe+ concentration in the treated water in comparison to initial concentration in raw water. The complete treatment process initialized by the adopted singular treatment method(Magnetic Filteration) lead to a significant reduction in time span of the whole process as compared with the standard Multi-tier process for the treatment of sewage water at the Wastewater teatment plant.
