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Process intensification with inline pre and post processing mechanism for valorization of poultry litter through high rate biomethanation technology: A full scale experience

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Highlights

Biomethanation of poultry litter for the generation of biogas based off grid power.

Process integration with ammonia inhibition control, pre & post processing assembly.

Demonstration of ‘a full-scale plant to treat 1000 kg/day of poultry litter.

Generation of 68 m3 of biogas per day (58–60% CH4) and 105 kg/day of digestate.

Conversion of biogas to power (89 kWh/day) with biogas engine to drive water pumps.

Abstract

High rate biomethanation technology based on anaerobic gas lift reactor (AGR) for the treatment of poultry litter (PL) has been demonstrated to generate biogas and digestate. The plant was installed and operated continuously for 95 weeks (September 2012 to June 2014) under ambient temperature conditions (in the range of 24–31 °C) for the treatment of 1000 kg of PL per day containing 254 kg of total solids and 220 kg of volatile solids. Biogas (68 m3/day) produced in the plant was successfully converted to electrical power (89 kWh/day) that was utilized to operate water pumps in the agricultural fields. The digestate (105 kg/day) was effectively employed in the nearby fields as an organic fertilizer. The plant was operated by establishing an intensified process mechanism incorporating inline pre and post processing unit assembly along with ammonia inhibition control mechanism. It is understood from the full scale experience of this plant that, decentralized off grid power generation from PL could be a remunerative option to poultry farmers.

Graphical abstract

Keywords

  • Poultry litter;
  • Biogas;
  • Electrical power;
  • Process intensification;
  • Anaerobic gas lift reactor;
  • Full scale

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