Construction for Horizontal sub surface flow constructed wetland with screen and settling chamber for greywater with BOD up to 100mg/lit FLOW 10KLD at Vannikonendal Village in Vannikonendal Panchayat at Manur Panchayat Union Construction for Horizontal sub surface flow constructed wetland with screen and settling chamber for greywater with BOD up to 100mg/lit FLOW 10KLD at Vannikonendal Village in Vannikonendal Panchayat at Manur Panchayat Union