ABSTRACT
The organic sulfide in garlic wastewater has a strong antibacterial and bactericidal effect, which leads to the difficulty of efficient biochemical degradation of garlic wastewater. The effects of PAC dosage, pH value, reaction time, and stirring speed on organic sulfur removal were analyzed by coagulation static experiment. When the mass concentration of organic sulfur in the influent is 204mg/L when the dosage of PAC is 1.5g/L, pH value is 9, reaction time is 30min, and stirring speed is 120r/min, the removal effect of organic sulfur is the best, the removal rate reaches 99.50%, and the mass concentration of organic sulfur in the effluent is 1mg/L. PAC can effectively reduce the organic sulfur concentration of garlic wastewater, increase the B/C value of wastewater from 0.34 to 0.44, improve the biodegradability of garlic wastewater, and provide favorable conditions for subsequent biochemical treatment of wastewater.
