Anaerobic Codigestion of Poultry Manure and Sewage Sludge under Solid-Phase Configuration

作者：Fierro Julio; Martinez Judith E; Rosas Jose G; Blanco Daniel; Gomez Xiomar^*

来源：Environmental Progress & Sustainable Energy, 2014, 33(3): 866-872.

DOI：10.1002/ep.11860

• anaerobic digestion
• sewage sludge
• poultry manure
• solid phase
• percolating system

Anaerobic digestion (AD) is an efficient technology for valorizing biomass. However, when considering livestock farm operation, the dilution of the biomass to be treated in a conventional anaerobic digester may not be a suitable alternative. Solid phase percolating system may circumvent this problem. These types of digestion systems require low volume of water, thus needing a smaller reactor. In this line, AD of poultry manure (PM) and primary sludge (PS) was studied in a percolating reactor with high-solid content. The process was carried out in laboratory-scale plant at mesophilic conditions.
The addition of PS as cosubstrate in a 10: 1 ratio of volatile solids (VS) improved biogas yield as well as VS removal. Two-fold higher biogas production was observed with the addition of cosubstrate along with an increase from 46 to 64% in the removal of VS. The initial acidification of the percolate could be perfectly balanced by the high alkalinity of the system. Methane yield obtained from the codigestion experiment was 56.5 l CH4/kg VS while the digestion of PM resulted in a value of 24.6. The ammonium concentration values measured in the percolate did not reach inhibitory levels in spite of the high nitrogen content present in PM.

• 出版日期2014-10