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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Author(s)
Janaína dos Santos Ferreira1, Magali Christe Cammarota1 and I. Volschan Junior2
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DOI:10.17265/1934-8975/2017.09.002
Affiliation(s)
1. Biochemical Engineering Department, School of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro 21941-909, Brazil
2. Water Resources and Environmental Engineering Department, Polytechnic School, Federal University of Rio de Janeiro, Rio de Janeiro 21941-972, Brazil
ABSTRACT
This paper presents bench scale experiments
related to anaerobic co-digestion of aerobic sewage sludge from a pilot WWTP (waste water treatment
plants), raw glycerol from a
biodiesel industry and food waste.
Assays were conducted in 100 mL non-stirring penicillin vessels, at 30 °C and
planned according to three optimization phases: (1) binary mixture of sewage
sludge and FW (food waste); (2) binary mixture
of sewage sludge and glycerol; and (3) ternary mixture of sewage sludge, FW, and glycerol. In the first and
second phases, the highest SMP (specific methane production)
was achieved by 10% (v/v) FW and 0.5%
(v/v) glycerol mixtures. The optimization of the ternary mixture during the
third phase was reached by the combination of 10% (v/v) FW and 0.4%
(v/v) glycerol. Despite the low SMP value, the addition of
glycerol and FW contributed to doubling the SMP value of the sludge sample control.
KEYWORDS
Anaerobic digestion, co-digestion, sludge, organic fraction municipal solid waste, glycerol.
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