Anaerobic treatment of wastewater using an upflow anaerobic sludge blanket reactor. Issue 20 (17th October 2016)

• Record Type: Journal Article
• Authors: Odejobi, Oludare J.; Oladunni, Atilade A.; Jegede, Abiodun O.
• Is Part Of: Energy sources. Volume 38:Issue 20(2016)
• Page Start: 3011
• Page End: 3018
• Publication Date: 2016-10-17
• Subjects: Organic loading rate -- pH -- renewable energy -- temperature -- UASB reactor; Natural resources -- Periodicals; Energy consumption -- Periodicals; Energy consumption -- Climatic factors -- Periodicals; Energy conversion -- Periodicals; Energy conversion -- Environment aspects -- Periodicals; Power (Mechanics) -- Periodicals; 333.7905
• DOI: 10.1080/15567036.2015.1129372
• Languages: English
• ISSNs: 1556-7036

Abstract

ABSTRACT: An upflow anaerobic sludge blanket (UASB) reactor of volume 0.03 m 3 was designed and fabricated to treat wastewater. The initial organic loading rate (OLR) of the wastewater estimated to be 4.8 gVS/l.d was later reduced to 0.96 gVS/l.d to control the observed acidity in the medium while the reactor was operated continuously for 64 days. The percent biological oxygen demand (BOD) and volatile solid (VS) removal were calculated over a period of 5 weeks to measure the efficiency of the reactor. The mean VS, total solid (TS), and BOD for the influent substrate were 0.43 g/kg, 0.84 g/kg, and 0.020 mg/m 3, respectively, while for the treated wastewater, the VS, TS, and BOD were 0.30 g/kg, 0.59 g/kg, and 0.013 mg/m 3, respectively. The estimated energy produced by the biogas was 5.8 kWh and 0.001 m 3 of the biogas raised the temperature of 20 ml of water by 11.8°C in 40 s. The study concluded that the UASB reactor designed could treat the wastewater and the biogas generated could also serve as a source of renewable energy for cooking. However, the start-up OLR should be monitored in the course of operation to prevent souring of the digester and to achieve optimum performance of the reactor.