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Pig slurry is characterized by showing high concentration of total nitrogen (0.5–4.0 g l−1), organic matter (20–110 g l−1 CODT), fecal coliforms (103–108 CFU ml−1), and liquid phase content (around 90 %). The high total nitrogen and liquid phase content, makes its use as biofertilizer very interesting. However, in order to avoid greenhouse gas emissions, transformation of organic matter into methane...
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