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Co-digestion of biofuel deoiled cakes with different combinations of cow dung for biogas production and nutrient rich manure

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The study revealed that the pH of cow-dung slurry at the beginning was 7.8; neem-cake, 5.0 and pongamia-cake, 5.8 suggesting significant differences in pH among the bio-gas substrates used. Two months after anaerobicdigestion, there was increase in pH with increase in the proportion of cow-dung and also increase in total-N and P in biogas spent slurry after anaerobic-digestion. There was no definite trend with reference to total-K. |