empresas ou indústrias de médio e grande porte que têm resíduos orgânicos, tanto sólidos como líquidos, decorrentes da sua produção agro-industrial.
CASE STUDY – Usina 10 MWe
|CAPACIDADE DA INDÚSTRIA 4,000,000 t/ano de cana de açúcar|
|COD DO EFLUENTE||25,000 mg/l|
|CHP||Energia elétrica||10 MWe|
A vinhaça é o principal resíduo da produção de etanol e açúcar de cana. Ela apresenta um elevado conteúdo de matéria orgânica, sais e um pH ácido, características que, em elevadas quantidades diárias, podem causar um grande impacto ambiental no solo, lençol freático, e contribuir com a emissão de gases do efeito estufa e com a proliferação da mosca do estábulo.
A utilização mais comum da vinhaça é a sua disposição nas plantações de cana de açúcar, alterando a composição do solo e provocando danos aos lençóis freáticos e as criações de animais mais próximas.
SEBIGAS desenvolveu uma usina sob medida que consiste em converter a matéria orgânica presente na vinhaça em biogás, gerando assim, energia renovável e melhorando as características dos efluentes de saída da usina.
A solução prevê a utilização de uma lagoa coberta de grandes dimensões, com um sistema de injeção, mistura e recirculação do efluente, permitindo um controle dos parâmetros mais importantes da digestão anaeróbica. Garante-se assim uma eficiência muito elevada da convesão da matéria orgânica.
• Produção de biogás que pode ser usada para gerar energia elétrica e/o biometano.
· Redução do COD, estabilização do pH, concentração de NPK na vinhaça de saída da digestão anaeróbica.
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