DOMESTIC WASTE WATER TREATMENT BY FLY AND WOOD ASH ALONG WITH ADDITIVES MATERIALS

Fly ash and wood has been separately studied for their adsorption properties. A lot of work has been reported on the adsorption and other construction related uses of fly ash. But a little or no work so far has been reported for the use of fly ash for the treatment of domestic laundry waste water. The present study reports the use of fly ash alone and in combined state in different ratios with wood ash for the treatment of domestic laundry waste water. Effect of various parameters such as combination ratio of fly ash and wood ash, contact time, adsorbent dosage and particle size of adsorbent have been studied. It is found that TSS(total suspended solids) is reduced from 350 ppm to 15-20ppm, total BOD from 250ppm to 10-20 ppm and ph dropped from highly alkaline range to 8.5-9.5 range, reduction of 80% in total soap content, FOG(fats, oils and grease)from visible turbid level to non turbid and clear solution. It is also reported here that for efficient treatment of domestic wash water waste adsorbent dosage of 40g/L is recommended.