Perspectives on carboxylates generation from Ecuadorian agro-wastes.

Carboxylates generation from banana (peel and pulp), coffee, and cacao fermentation agro-waste, upon uncontrolled and controlled pHs of 6.6 (heat-driven methanogens inactivation) and 5.2 (pH inactivation), was studied.

Decrease of dissolved sulfide in sewage by powdered natural magnetite and hematite.

Unlabelled: Natural magnetite and hematite were explored to decrease sulfide in sewage, compared with iron salts (FeCl and FeSO). A particle size of magnetite and hematite ranging from 45 to 60μm was used. The results showed that 40mgL of powdered magnetite and hematite addition decreased the sulfide in sewage by 79%and 70%, respectively.