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Fig. 4.7 Variation of soluble metabolite products achieved from CH 4-UASB reactor at different

HRTs under thermophilic temperatures; [1, 4] BA medium + sucrose 2 g/L, [2] (BA

medium + sucrose 2 g/L) + effluent H 2 at 1:1 (%v/v), [3, 5, 7] BA medium + Effluent

H 2 and [6] Effluent H 2 + NaHCO 3 2 g/L

Fig. 4.8 Variation of methane production rate and methane production yield achieved from CH 4-

UASB reactor at different HRTs under thermophilic temperatures; [1, 4] BA medium +

sucrose 2 g/L, [2] (BA medium + sucrose 2 g/L) + effluent H 2 at 1:1 (%v/v), [3, 5, 7]

BA medium + Effluent H 2 and [6] Effluent H 2 + NaHCO 3 2 g/L