Performance Evaluation of Baffled and Floating Hybrid Constructed Wetland Operated Under Field Conditions

Shrutee Dasare,Guru Munavalli

doi:10.1051/e3sconf/202017006015

Abstract

Baffled and Floating Hybrid Constructed Wetland (BFHCW) consisting of constructed wetland with brickbat medium and Floating Treatment Wetland (FTW) was developed and operated under actual field flow conditions. BFHCW was vegetated with dual-species (Typha angustifolia L. and Canna indica). The performance of continuously operated system was evaluated for varied Hydraulic Loading Rate (HLR) and Organic Loading Rate (OLR) for a longer period. The system was also assessed for controlled flow rate resulting more uniform OLR and HLR. The results showed that COD removal efficiency was enhanced by 5 to 15% with controlled flow than uncontrolled highly fluctuating flow conditions. HLR has more impact on COD removal than OLR. BFHCW is effective to an extent of 25 to 40% for COD removal. BFHCW is found to be cost effective and reasonably efficient treatment for pretreated domestic wastewater.

Highlights

The volume of domestic wastewater generated has increased with population, urbanization, improved living conditions, and economic development
A system based on this concept referred as Baffled Floating Hybrid Constructed Wetland (BFHCW) was implemented for the treatment of domestic wastewater in the campus of Walchand College of Engg., Sangli (WCE)
BFHCW was a secondary treatment in Decentralized Wastewater Treatment System (DWTS) of WCE which was fed with wastewater pre-treated in anaerobic baffled reactor

Summary

Introduction

The volume of domestic wastewater generated has increased with population, urbanization, improved living conditions, and economic development. Constructed Wetland (CW) is one of the suitable and affordable options as secondary treatment in DWTS. CWs have emerged as an economical and feasible option for the treatment of domestic wastewater, as they can be built with locally available materials, simple construction, and utilization of natural processes, lower operation and maintenance cost. The choice of an appropriate coarser media and combining CW with another treatment system helps to overcome these problems. In this context, CW system with brickbat as a support media for CW vegetation and Floating Treatment Wetland (FTW) arranged in a typical hybrid sequence can be devised. A system based on this concept referred as Baffled Floating Hybrid Constructed Wetland (BFHCW) was implemented for the treatment of domestic wastewater in the campus of Walchand College of Engg., Sangli (WCE). BFHCW was a secondary treatment in DWTS of WCE which was fed with wastewater pre-treated in anaerobic baffled reactor

Objectives

Methods

Results