O vai otaota e gaosia e furfural o loʻo i totonu o le faʻaogaina o otaota otaota, e aofia ai le cetic acid, furfural ma alcohols, aldehydes, ketones, esters, organic acids ma le tele o ituaiga o meaola, PH e 2-3, maualuga maualuga ile COD, ma leaga ile biodegradability .