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Reciclagem descentralizada de resíduos orgânicos industriais através do processo de codigestão anaeróbia com chorumes de suinicultura
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Resumo(s)
This study aimed to conclude about the performance and effectiveness of co-anaerobic
digestion solutions applied to decentralised management of residual flows of livestock
production, agricultural and agro-industries.
Therefore, it was considered the anaerobic co-digestion of two waste streams produced in the
same geographic area within an intensive pig production region, with a logical approach to
industrial ecology. For the working base model of co-digestion with pig slurry (ChS), it was
chosen the waste stream of pears and apples (RPM) from the rejection and selection processes
of centralised fruit storage and distribution facilities, and the oily exudate from the industrial
cooking process of sardines (ECS) of a sardine cannery factory.
A comprehensive study of water use and production of manure on pig farms was conducted in
order to conclude about the average quality of pig slurry produced in Portugal. From the
several trials developed, it was concluded that residues of pears and apples after a
bioconversion pre-treatment (BRPM) are an excellent co-substrate. With a composition (v/v
%) BRPM:ChS of 30:70 and 66:34, it was increased respectively 3 and 3,6 times the
productivity of the digester, when compared with the performance achieved only with pig
slurry. The anaerobic co-digestion of BRPM in with ChS resulted in a national patent. From
the experiments that used wasted sardine oil (ECS) as co-substrate it was concluded that a
mixture composition (% v/v) ECS:ChS of 5:95, could increase in a 3,7 fold the productivity
of the digester, when compared with the one achieved only with pig slurry.
In order to transpose these studies to more realistic conditions, a mobile pilot plant was
designed in order to develop in natural operation conditions similar assays in a pig farm. This
anaerobic digestion mobile unit was also patented. The pilot study demonstrated the technical
feasibility to develop anaerobic co-digestion processes using the waste stream of pears and
apples and the exudate from the industrial cooking process of sardines with pig manure, and
to manage it in a decentralised model throughout the year.
Descrição
Doutoramento em Engenharia do Ambiente - Instituto Superior de Agronomia
Palavras-chave
bioprocess anaerobic co-digestion industrial organic wastes pig slurry decentralised biogas production efficient water use
Contexto Educativo
Citação
Ferreira, L.J.M. - Reciclagem descentralizada de resíduos orgânicos industriais através do processo de codigestão anaeróbia com chorumes de suinicultura. Lisboa: ISA, 2014, 180 p.