Comparison of Raw and Pyrolyzed Rice Husk as Bio-Trickling Filters Media in Greywater Treatment System

Ebtesam K. Abbas; Seroor Atalah K. Ali

doi:10.70516/34yn7403

Authors

Ebtesam K. Abbas Environmental Engineering Department, College of Engineering, Mustansiriyah University, Baghdad, Iraq Author https://orcid.org/0009-0004-2540-0374
Seroor Atalah K. Ali Environmental Engineering Department, College of Engineering, Mustansiriyah University, Baghdad, Iraq Author https://orcid.org/0000-0002-3388-141X

DOI:

https://doi.org/10.70516/34yn7403

Keywords:

Rice Husk, Biomass, Bio Char, Greywater, Waste, Porosity

Abstract

Iraq currently faces an absence of water, worsened by population growth. As a result, if new water sources are not supplied, the country’s yearly per capita water supply will decrease. In this study, a simple, promising, and economical method for on-site greywater treatment is developed, employing agricultural waste as a bio filter medium and using it as irrigation water in rural Iraqi areas. The impact of rice husk biomass waste's pyrolysis and bio char characteristics on greywater treatment was examined using a bio trickling column treatment. Waste biomass from rice husks was paralyzed at 360°C. The pyrolysis of the husk biomass resulted in an increased surface area and pores. COD and BOD removal percentages in BTF2 were 81% and 88%, respectively. BTF1 has a 65% efficiency in COD removal and a 71% efficiency in BOD removal. For BTF1 and BTF2, the corresponding nitrate removal percentages were 52.93% and 75.38%. For BTF1 and BTF2, the respective phosphate removal rates were 45% and 65%. For BTF2, in this study the result show that the filter BTF2 (bio char filter) was the more effected than BTF1 (raw rice husk filter) in removal pollutant from greywater demonstrated a good deal of promise for treating greywater. Limiting the accumulation of agricultural waste and using it as a bio filter media for municipal greywater treatment are essential steps toward ensuring the environmentally safe disposal of agricultural waste in Iraq and reducing the cost of wastewater treatment.

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