PM11 Treatment of Wastewater
Exhibit Hall
8:00 AM - Monday, 10 November 2003
(PM174) Winter removal of BOD and solids from an industrial effluent using constructed wetlands.
Huddleston, G1, Arrington, J2, Rodgers, J2, 1 Entrix, Inc.2 Clemson University
ABSTRACT- A constructed wetland system for wastewater treatment was designed for an adhesives manufacturing facility located in South Carolina, USA. The facility is permitted under the National Pollution Discharge Elimination System (NPDES) to release treated wastewater (approximately 80,000 gpd on average) to the Enoree River. The constructed wetland design targeted biochemical oxygen demand (BOD) and total suspended solids (TSS). A wetland microcosm system was constructed outdoors at the facility using 560-L tanks, local sandy soil, and planted with Typha latifolia (cattail). The study was conducted through the 2002-2003 winter to evaluate wetland performance during cold months and to confirm the suitability of wetland design characteristics. Concentrations of five-day BOD and TSS in water treated by the constructed wetland microcosm system were consistently ≤10 mg/L and ≤5 mg/L, respectively, and well below NPDES discharge limits. The effectiveness of this constructed wetland design has prompted the facility to consider implementation into their current wastewater treatment system, with potential options for water recycling and reuse.
Key words: wastewater treatment, constructed wetlands, biochemical oxygen demand, solids