Abstract
A starch-containing textile desizing wastewater (TDW) contains high strength organics that needed to be removed or reused. A novel process combining granular activated carbon (GAC) adsorption, mesophilic anaerobic digestion (AD) and microalgae Scenedesmus sp. cultivation was investigated using lab-scale reactors to treat a TDW for strength removal and producing biogas and algae biomass. TDW was pretreated by GAC to reduce AD-inhibitive matters and the digester effluent was further treated by the microalgae. This combination system achieved a total hydrogen, methane and ethanol energy production rate of 16.9 kJ/(L·d) and high removal efficiencies for color 92.4%, chemical oxygen demand (COD) 89.5%, carbohydrates 97.4% and organic acids 94.7%. At an AD effluent of 3.8 g COD/L, Scenedesmus sp. had high utilization efficiencies for acetate 95.2%, propionate 97.1% and butyrate 98.2% with a specific growth rate of 0.53 d−1. Based on the experimental data, to treat a TDW in a flowrate of 1000 m3/d, productions of methane and dry microalgae biomass were predicted as 2.07 × 107 kJ/d and 9800 kg/7 d, respectively.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
