Time-Dependent Retardation Model for Chemical Oxygen Demand Removal in a Subsurface-Flow Constructed Wetland For Winery wastewater Treatment

摘要

The relative success of chemical oxygen demand (COD) removal models to describe measured rates of COD removal in a pilot- scale constructed wetland designed for treatment of high-strength winery wastewater are evaluated using retention times determined from tracer studies. Not surprisingly, two-parameter residual and retardation models better fit the measured removal data than single-parameter, first-order decay models for wastewater at average COD loadings up to nearly 5000 mg/L. The residual and retardation models yielded nearly equivalent fits to the measured data.