Effect of Carbon Depth in Diminution of Physico-Chemical Pollution Parameters in Cassava Processing Wastewater Treated by Aeration-Peroxide Oxidation Method

Abstract

This study investigated the effect (attenuation of physico-chemical pollution characteristics) of carbon depth in vertical flow adsorption-filter system of the peroxide oxidation-aeration treatment process for cassava wastewater treatment. Results revealed that although the combined peroxide oxidation, aeration and adsorption-filter treatment process was successful in the reducing pollution characteristics of wastewater from cassava processing, the adsorption-filter part of the treatment process with carbon depths 0, 5, 10 and 15 cm carbon depths were observed to have been selective in removal of physico-chemical pollution characteristics. Parameters such as colour, SO 4 2-, NO 3-, Cl -, Ca 2+ , Zn 2+ , TDS and TSS were observed to have exhibited increased decontamination efficiency as the depth of carbon increased in the treatment process while Fe 2+ and CN ions exhibited delayed adsorption. Depth of carbon filter was however observed to have had no effect on Ni 2+ and Phenol content removal.

Wastewater management for irrigated farming: Composition, morphology and production level variation in amaranthus sp. irrigated with peroxide-aeration treatment recycled cassava processing effluent

“…Cassava processing wastewater was collected from a local cassava processing factory at Apata community of Ibadan located in the South Western part of Nigeria. The pH of effluent collected from cassava processing wastewater was taken to a range between 10 and 11 by back titrating it with 0.5 M of NaOH (Figure 1) in an oxidation tank in order to have about 99% CN in the form of HCN content in solution as suggested by Omotosho et al, (2018). Hydrogen peroxide with a concentration of 50% was then introduced at a rate of 2.5 x 10 -2 ml/l of wastewater (approximately 0.5 g H2O2/g of CN -) to ensure oxidation where hydrogen cyanide (HCN) is converted to cyanate (CNO) and water molecule (H20).…”