Municipal wastewater minimization through waste H 2 O 2 from food industry.

In order to meet the water demands of ever-increasing human population, wastewater treatment is a challenging task. Advanced oxidation processes are promising technologies for wastewater treatment. The current study employed waste H2O2(40%) collected from a food industry to treat municipal wastewater (MWW) of Abbottabad city in Pakistan. Various H2O2doses (1, 1.5, 2, and 2.5 mL L−1) were applied to evaluate its influence on water quality parameters like chemical oxygen demand (COD), biochemical oxygen demand (BOD5), pH, conductivity, turbidity, and fecal coliforms. Using 2.5 mL waste H2O2, the initial concentration of BOD5200 mg L−1and COD 327 mg L−1were reduced to 70 and 93 mg L−1, respectively; in addition to 51.72 and 50% reduction of turbidity and coliform populations. An increase in conductivity was noted after 30 min and at 90 min of peroxide dose application. No significant change occurred in pH at lower H2O2dosing but it increased to 8.5 when higher dose of H2O2was applied. The treatment strategy may effectively improve the quality of MWW rendering it suitable for its use in agricultural sector. [ABSTRACT FROM PUBLISHER]