Organic Fraction of Municipal Solid Waste (OFMSW) Using Continuous-Flow Anaerobic Reactor

Abstract

This manuscript describes the particle size distribution based model.This model accounts for the degradation and methane production from the anaerobic digestion of the (OFMSW) organic fraction of municipal solid waste. The model also shows the reduction in cost of solid waste treatment. Analysis was done based on laboratory test, carried out to test the operating parameter such as Ammonia, PH, Temperature, volume of gas, total solid, volatile solid, nitrate, nitrite, phosphate and conductivity while Volatile fatty acid was negligible. The organic waste samples used was cow dung, and was digested using a continuous flow stirred reactor, which was constructed locally at the institution hydraulic laboratory. Results from the test and analysis reveals high concentration of ammonia which inhibited the production of gas. The total solid content was observed to determine the rate of organic loading of the reactor. The biogas production from the continuous flow reactor, contains ammonia concentration of 460mg/l ,385mg/l, 300mg/l, 193mg/l, 120mg/l and 130mg/l, under similar operating PH of 6.68. There was no contribution of biogas production from inoculation. Total volume of biogas produced was calculated and was found to be 0.036m3, 0.040m3, 0.055m3 0.053m3and varied according to PH range of 6.67 to 7.2. The result also shows that at a PH of 7.2, ammonia concentration was high, limiting the methane production rate. The highest form or concentration of nitrate and nitrite occurs at the end of the detention period. Decrease in the PH value and conductivity was a strong indication of the present of nitrate and nitrite in the solution of the waste sample.