COMPARATIVE STUDY ON THE EFFICACY OF BIOGAS PRODUCTION FROM MIXTURE OF ANIMAL WASTE AND PISTIA STRATIOLES (WATER LETTUCE)

Biogas was produced from the mixture of Sheep dung and Water lettuce Glutathione (Pistia stratioles) in the ratio of 2:1 and 1:2 over a period of 77 days.Proximate analysis was done to determine the physicochemical parameters of each dried sample.Daily temperature of the laboratory, initial and final pH of the digesters containing slurry was record

Introduction: Benign tracheal stenosis is a common problem encountered after tracheal intubation or tracheostomy.It can be managed by surgical or nonsurgical techniques.This case series describes the outcome of 11 cases of endobronchial treatment for complex tracheal stenoses.Methods: A retrospective study was carried out in two hospitals in Lebano