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Molasses wastewater wastreated anaerobically using anupflow anaerobic sludge blanket reactor (UASB) and ahybrid UASB reactor. The hybrid reactor was a conventional UASB reactor equipped with a matrix of 19parallel ropes in itsmid-section. The ropes were added toincrease the surface area for bacterial attach ment. Themaximum methane production of 1.12 L methane L" ?d" was obtained at theorganic loading rateof 8.3g COD L" ?d" for the hybrid reactor, while amaximum production of0.91L methane L" ?d" wasachievedfor the conventionalUASB at the organic loading rate of 5.8 g COD L'^d"1. The additional biomass attached to the ropes enhanced thebiogas production and also rendered thehybrid reactor more tolerant tohigher organic loading rates. Thehybrid reactor is an innovative design which has characteristics and advantages of both suspended-growth and attached-growth systems.
K.V. Lo, C.Chiu and P.H. Liao 1991. Anaerobic treatment of molasses wastewater I. Start-up and steady-state performance. Canadian Agricultural Engineering 33(2):295-301.
Canadian Society for Bioengineering