Anaerobic co-digestion of different wastes in a UASB reactor. (July 2018)

• Record Type: Journal Article
• Authors: Kumari, Khushboo; Suresh, S.; Arisutha, S.; Sudhakar, K.
• Is Part Of: Waste management. Volume 77(2018)
• Page Start: 545
• Page End: 554
• Publication Date: 2018-07
• Subjects: Anaerobic -- Sewage sludge -- Dairy wastewater -- Cow manure -- UASB -- Kitchen waste; UASB Up flow anaerobic sludge blanket reactor -- COD chemical oxygen demand -- VFA volatile fatty acid -- TS total solid -- VS volatile solid -- KW kitchen waste -- YW yard waste -- FW floral waste -- DWW dairy wastewater -- SS sewage sludge -- CM cow manure -- SEM scanning electron microscopy -- EDAX energy dispersive X-ray spectroscopy -- FTIR fourier transforms infrared spectroscopy -- DTA differential thermal analysis -- TGA thermal gravimetric analysis -- AFM atomic force microscopy; Hazardous wastes -- Periodicals; Refuse and refuse disposal -- Periodicals; 363.728
• DOI: 10.1016/j.wasman.2018.05.007
• Languages: English
• ISSNs: 0956-053X

Abstract

Highlights: Anaerobic co-digestion of various waste carried out. Methane Gas yield and COD are assessed for various conditions. Characterisation of the residue using AFM, FTIR, SEM, and EDX. Abstract: Anaerobic co-digestion has made a greater impact on the biogas production from mixing different type of waste. In this research, sewage sludge (SS) and cow manure (CM), was used as a primary waste along with kitchen waste (KW), yard waste (YW), floral waste (FW) and dairy wastewater (DWW) as co-substrate for anaerobic digestion. Mixtures with a ratio of 1:2 ratio is fed into a single stage up-flow anaerobic sludge blanket (UASB) reactor. Digestion was carried out in a mesophilic temperature range for 20 days. pH and VFA were measured and ranged from 5 to 7.5 and 3500–500 mg/L, respectively, for all the mixtures throughout the digestion period. Percentage of COD removal efficiency after 20 days was found to be in the range of 76–86%. The maximum biogas production rate was found to be 4500 mL/day. Characterization of the final residue from each of the digesters was carried out by Scanning Electron microscope, Energy dispersive, thermogravimetric, FTIR Spectra, and Atomic microscope. Thermal analysis reveals that spent sludge can be potential waste energy sources.