Removal of volatile organic sulfur compounds by aeration during algae-induced black blooms in shallow lakes

0

Courtesy of IWA Publishing

High levels of volatile organic sulfur compounds (VOSCs) have frequently been detected during algae-induced black blooms, which pose an ecological threat to water bodies and their surrounding residents. In this study, aeration was applied to remove the VOSCs after the outbreak of a black bloom. The removal efficiencies under different aeration rates (A1 (0.06 m3-air min−1 m−3), A2 (0.18 m3-air min−1 m−3), and A3 (0.54 m3-air min−1 m−3)) were compared. For treatments A2 and A3, the level of dissolved oxygen (DO) and the oxidation-reduction potential (Eh) increased sharply after 1 h of aeration, and about 70% of the VOSCs were removed from the water columns; however, for treatment A1, the increases in DO and Eh and the rate of removal of VOSCs were slower. The ultimate removal rate of VOSCs was >99% for all the aerated treatments after 24 h. The alteration of the oxidation-reduction conditions, induced by the aeration, could be the primary reason for the removal of the VOSCs. Thus, aeration treatment might be a feasible technique for the removal of VOSCs after the outbreak of black blooms in waterworks and some shallow lakes.

Customer comments

No comments were found for Removal of volatile organic sulfur compounds by aeration during algae-induced black blooms in shallow lakes. Be the first to comment!