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UASB treatment of a highly alkaline fruit-cannery lye-peeling wastewater

dc.contributor.authorSigge G.O.
dc.contributor.authorBritz T.J.
dc.date.accessioned2011-05-15T15:58:10Z
dc.date.available2011-05-15T15:58:10Z
dc.date.issued2007
dc.identifier.citationWater SA
dc.identifier.citation33
dc.identifier.citation2
dc.identifier.issn3784738
dc.identifier.urihttp://hdl.handle.net/10019.1/10814
dc.description.abstractAnaerobic treatment of a highly alkaline fruit-cannery lye-peeling wastewater was investigated, using an upflow anaerobic sludge blanket (UASB) reactor. Only a short initialisation period was required before COD reduction and OLR had stabilised at 85 to 90% and 2.40 kgCOD·m -3·d-1, respectively. With subsequent increases in OLR to 8.1 kgCOD·m-3·d-1, the COD reduction remained between 85 and 93% and biogas production peaked at 4.1 ℓ·d-1 (63% methane). COD and reactor pH started to decrease after 111 d. Decreases in gas production were observed by Day 102, decreasing to 2.48 ℓ·d-1 by Day 111 and 0.93 ℓ·d-1 after 129 d. Subsequent reductions in the OLR, by reducing influent COD, had no effect on reactor stability. Loss of reactor performance was ascribed to the accumulation of sodium (potentially > 20 000 mg·ℓ-1) within the reactor biomass, leading to inhibition of methanogenesis.
dc.subjectAnaerobic digestion
dc.subjectBiomass
dc.subjectChemical oxygen demand
dc.subjectChemical reactors
dc.subjectpH effects
dc.subjectFruit cannery
dc.subjectMethanogenesis
dc.subjectupflow anaerobic sludge blanket (UASB) reactor
dc.subjectWastewater treatment
dc.subjectAnaerobic digestion
dc.subjectBiomass
dc.subjectChemical oxygen demand
dc.subjectChemical reactors
dc.subjectpH effects
dc.subjectWastewater treatment
dc.subjectactivated sludge
dc.subjectalkalinity
dc.subjectanoxic conditions
dc.subjectchemical oxygen demand
dc.subjectpH
dc.subjectsodium
dc.subjectwaste treatment
dc.subjectwastewater
dc.titleUASB treatment of a highly alkaline fruit-cannery lye-peeling wastewater
dc.typeArticle
dc.description.versionArticle


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