Anaerobic co-digestion of different wastes in a UASB reactor

Kumari K 1 , Suresh S 2 , Arisutha S 1 , Sudhakar K 3

Affiliations 

  • 1 Biochemical and Bioenergy Engineering Research Laboratory, Department of Chemical Engineering, Maulana Azad National Institute of Technology, Bhopal 462 003, India
  • 2 Biochemical and Bioenergy Engineering Research Laboratory, Department of Chemical Engineering, Maulana Azad National Institute of Technology, Bhopal 462 003, India; Advanced Analytical and Simulation Research laboratory, Department of Chemical Engineering, Maulana Azad National Institute of Technology, Bhopal 462 003, India; Nano-engineered materials for Environmental Problems, Centre for Discovery and Innovation, City College of New York, 10031, CUNY, USA. Electronic address: sureshs@manit.ac.in
  • 3 Energy Centre, Maulana Azad National Institute of Technology, Bhopal 462 003, India; Faculty of Mechanical Engineering, Universiti Malaysia Pahang, 26600 Pahang, Malaysia. Electronic address: sudhakar@ump.edu.my
Waste Manag, 2018 Jul;77:545-554.
PMID: 29778405 DOI: 10.1016/j.wasman.2018.05.007

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.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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