ACTION DES BOUES RÉSIDUAIRES DE LA STATION D’ÉPURATION DES EAUX USÉES DE TOUGGOURT (ALGERIE) SUR UN SOL SABLEUX CULTIVÉ

Abstract

In the enhancement of the waste sludge wastewater treatment of wastewater of Touggourt, we applied increasing doses on a sandy soil grown watermelon. The results obtained show a highly significant correlation between the level of organic amendment and productivity: the best performance is obtained with an intake of 25 tonnes of sludge/hectare. Moreover, applied sludge improved the rate of organic matter and therefore the rate in humus, element that attaches the fertility and life of a soil which resulted in essentially by the increase of the cation exchange capacity from 15.4 to 21.5 mEq/100 g and water holding capacity from 16,07 to 20,49%. Finally, heavy metals. in the light of their concentrations in sludge used and the plant and soil with traces, then could not constitute a danger to the agricultural activity in the short and medium term.