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Influence of extrinsic factors on granulation in UASB reactor
Applied Microbiology and Biotechnology, 2006The aim of this mini-review is to synthesize and analyze information on how the process of granulation is affected by environmental and operational conditions in the reactor. The factors reviewed are temperature, pH, alkalinity, organic loading rate, upflow velocity, nature and strength of substrate, nutrients, multivalent cations and heavy metals ...
Manoj K, Tiwari +3 more
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UASB reactor effluent disinfection by ozone and chlorine
Journal of Environmental Science and Health, Part A, 2015This research studied the sequential ozone and chlorine process with respect to, the inactivation of indicator bacteria and the formation of ozone disinfection byproducts in sanitary wastewater effluent. The applied ozone doses were 5, 8 and 10 mg.O3.L(-1), followed by chlorine doses of 10, 20 and 30 mg.L(-1), respectively.
Ribeiro da Silvia, G.H. +3 more
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Granulation mechanism of a UASB reactor supplemented with iron
Anaerobe, 2008The aim of this paper was to propose a granulation mechanism in order to interpret all the experimental observations that arose during experiments on two UASB reactors, where one was supplemented with ferrous iron at a dose of 0.01 g Fe(2+) per g COD feed.
Apostolos, Vlyssides +2 more
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Co-degradation of resorcinol and catechol in an UASB reactor
Bioresource Technology, 2008Co-degradation of resorcinol and catechol was studied in a catechol acclimated up flow anaerobic sludge blanket (UASB) reactor. Synthetic binary aqueous solution having a total concentration of 1000 mg/L with the resorcinol/catechol (R/C) ratio of 1/19, 1/9, 3/17, 1/4, 1/3, 3/7, 2/3 and then 1/3 was fed at various time intervals to the UASB reactor ...
Revanuru, Subramanyam, I M, Mishra
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Determination of granule size distribution in a UASB reactor
Journal of Environmental Management, 2008Granular sludge is the key factor for an efficient operation of an upflow anaerobic sludge blanket (UASB) reactor. In order to monitor the granularity of anaerobic sludge, the determination of the granule size distribution is of vital importance. For this reason, several techniques have been proposed; however, they are either tedious, imprecise or ...
Apostolos, Vlyssides +2 more
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Anaerobic degradation of butyrate in a UASB reactor
Bioresource Technology, 1995Abstract Wastewater with concentrated butyrate was treated in a 2·8 l UASB (Upflow Anaerobic Sludge Blanket) reactor at 37°C and pH 7·1–7·7. The process consistently removed 97–99% of COD for loading rates up to 31 g COD/l/day. Of all the COD removed, 94·5% was converted to methane; the average sludge yield was 0·037 g VSS/g COD.
Fang, HHP, Chui, HK, Li, YY
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Anaerobic digestion of baker's yeast wastewater using a UASB reactor and a hybrid UASB reactor
2010The start-up and step-up operation of two 16-liter, continuously operated, upflow anaerobic reactors receiving baker's yeast wastewater is presented in this thesis. The two reactors (A and B) were almost identical in construction. Reactor A was a conventional upflow anaerobic sludge blanket (UASB) reactor, and reactor B was a hybrid reactor.
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An examination of the granulation process in UASB reactors
Environmental Technology Letters, 1986Abstract The production of compact, fully stabilized sludge granules is an essential aspect of the operation of UASB reactors. This paper examines how the granulation process is affected by innoculating the seed sludge with solids which had already granulated and by supplementing the feea with calcium and with phosphorous.
K.R.K. Alibhai, C.F. Forster
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Hydraulic Impact on Granules in UASB Reactors
Water Quality Research Journal, 1991Abstract 20 Litre UASB reactors, operated continuously, were used to study hydrodynamic influences on accumulation and settling characteristics of granules. Two experiments were performed. The effect of liquid upflow velocity in the reactor on granules was investigated in Experiment 1.
D. Maat +4 more
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Automatic Start-Up of UASB Reactors
Journal of Environmental Engineering, 2001A control system to automate the start-up of anaerobic wastewater treatment reactors is presented. The system controls the feedflow rate, using the biogas production or the biogas flow rate as the only on-line variable. Furthermore, other off-line parameters, such as methane content in the biogas and COD of influent are also necessary to calculate the ...
A. Puñal +4 more
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