Biogas production from ruminant and monogastric animal manure co-digested with manipueira
The aim of this study was to evaluate ruminant and monogastric animal manure co-digested with 10 % of manipueira through process monitoring parameters and biogas production. In this study, eight semi-continuous digesters, with a capacity of 7.8 liters of substrate in fermentation, operated with 30 d...
Saved in:
| Published in: | Archivos de zootecnia Vol. 65; no. 251; pp. 375 - 380 |
|---|---|
| Main Authors: | , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
01-09-2016
|
| Subjects: | |
| Online Access: | Get full text |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | The aim of this study was to evaluate ruminant and monogastric animal manure co-digested with 10 % of manipueira through process monitoring parameters and biogas production. In this study, eight semi-continuous digesters, with a capacity of 7.8 liters of substrate in fermentation, operated with 30 days of hydraulic retention time, were used. Monitoring analyses were performed in order to assess: pH, total ammonia nitrogen (TAN) concentration, partial alkalinity (PA), content and biogas yield (m3·kg·Volatile Solids (VS)added-1). There was no statistic difference for all the pH values, which reached values around 6.8 to 8.0. For PA, all the substrates reached higher than 1.200 mg·L-1 values as recommended. During the process, there was no risk of failure due to TAN concentration. The average biogas productions accumulated per week were 0.00676; 0.01167; 0.01515 and 0.01856 m3 for substrates composed by dairy cattle, sheep, poultry and swine manure co-digested with manipueira, respectively. The biogas yield for those respective substrates were 0.122; 0.275; 0.535 e 0.843 m3·kg·VSadded-1. The highest biogas yield was obtained for anaerobic co-digestion of swine manure with 10 % (volume/volume) of manipueira.
Objetivou-se avaliar o uso de manipueira na co-digestão anaeróbia com dejetos de animais monogástricos e ruminantes, por meio de parâmetros de monitoramento do processo e da produção de biogás. Foram utilizados oito biodigestores semicontínuos com volume útil de 7,8 L de substrato em fermentação operados com tempo de retenção hidráulica de 30 dias. Realizou-se análises de pH, nitrogênio amoniacal, alcalinidade parcial (AP), sólidos totais (ST), sólidos voláteis (SV), e rendimento do biogás (m3 kg SVadicionados-1). Os valores de pH e concentrações de AP apresentaram-se na faixa ideal para a ocorrência do processo de digestão, de 6,0 a 8,0 e acima de 1.200 mg·L-1, respectivamente. Durante o processo não houve risco de falência por concentrações de nitrogênio amoniacal. As produções médias de biogás acumuladas semanais foram de 0,00676, 0,1167, 0,01515 e 0,01856 m3, respectivamente para substratos formados por dejetos de bovinos de leite, ovinos, aves e/ou suínos codigeridos com manipueira. Os rendimentos para os respectivos substratos foram 0,122, 0,275, 0,535 e 0,843 m3 kg SVadicionados-1. Maiores produções de biogás são obtidas na co-digestão anaeróbia de dejetos de suínos com 10 % (volume/volume) de manipueira. |
|---|---|
| ISSN: | 0004-0592 |
| DOI: | 10.21071/az.v65i251.699 |