Abstract

Biogas production was measured on several anaerobic lagoons. Biogas production rates varied widely (0·02 to 0·50 m 3 m −2 day −1 (lagoon surface area basis): 0·03 to 0·23 m 3 m −3 day −1 (lagoon volume basis)). Carbon dioxide concentration of the lagoon biogas was less than 35%. Biogas production was influenced by lagoon organic acid concentration, position of the collection cover on the lagoon surface and lagoon temperature. Biogas production from normally-loaded lagoons (<0·06 kg VS m −3) is not of sufficient quantity nor is the production rate consistent enough throughout the year to be considered a reliable source of energy.

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