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Start-up alternatives and performance of an UASB pilot plant treating diluted municipal wastewater at low temperature [An article from: Bioresource Technology]
Description
This digital document is a journal article from Bioresource Technology, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
Different start-up procedures of an upflow anaerobic sludge bed (UASB) digester were carried out. Start-up without inoculum (experiment A) was delayed for about 120day. The digester reached 75-85% total suspended solids (TSS) removal, 54-58% total chemical oxygen demand (TCOD) removal and 63-73% biological oxygen demand (BOD"5) removal at influent concentrations of 240-340mgTCOD"il^-^1, temperatures of 13.5-15^oC and hydraulic retention times (HRT) of 10-11h. Digested sludge was used as inoculum in experiment B. After the start-up period of 75 days, digester efficiencies were 58%, 41% and 54% for TSS, TCOD and BOD"5 removal, respectively, working at 169mgTCOD"il^-^1, temperature of 14^oC and HRT of 11h. The sludge bed developed and stabilised quickly when using a hydraulically adapted inoculum (experiment C), but TCOD and BOD"5 removals remained low and volatile fatty acids (VFA) accumulated in the effluent.
Description:
Different start-up procedures of an upflow anaerobic sludge bed (UASB) digester were carried out. Start-up without inoculum (experiment A) was delayed for about 120day. The digester reached 75-85% total suspended solids (TSS) removal, 54-58% total chemical oxygen demand (TCOD) removal and 63-73% biological oxygen demand (BOD"5) removal at influent concentrations of 240-340mgTCOD"il^-^1, temperatures of 13.5-15^oC and hydraulic retention times (HRT) of 10-11h. Digested sludge was used as inoculum in experiment B. After the start-up period of 75 days, digester efficiencies were 58%, 41% and 54% for TSS, TCOD and BOD"5 removal, respectively, working at 169mgTCOD"il^-^1, temperature of 14^oC and HRT of 11h. The sludge bed developed and stabilised quickly when using a hydraulically adapted inoculum (experiment C), but TCOD and BOD"5 removals remained low and volatile fatty acids (VFA) accumulated in the effluent.
