论文信息 - Improvement of the anaerobic digestion of diluted whey in a fluidized bed by nutrient additions

Improvement of the anaerobic digestion of diluted whey in a fluidized bed by nutrient additions

Abstract Anaerobic digestion of diluted whey was performed in two different fluidteed bed pilot reactors of 40 1 and 250 1 respective volume. Different operating conditions were tested. Without nutrient addition there is a maximum COD removal rate which is directly proportional to the packing medium volume. The corresponding specific maximum COD removal rate is of about 6 kg COD degraded. m‐3 packed bed volume. d‐3. Suitable nutrient additions, consisting mainly of iron, nickel and cobalt salts and of dried yeasts, allow a dramatic increase of this maximum rate up to about 40 kg COD degraded m‐3 packed volume. day‐1. This increase of COD removal rate is mainly due to higher biomass accumulation inside the reactor.

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