Article

UASB Process Design for Various Types of Wastewaters

Proc. IAWPRC Int. Specialized Workshop, Valladolid, 1990. Water Sci. Technol. 24,8 (1991) 87-109 01/1991; 24(8).
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ABSTRACT

In this paper the design of UASB-reactors is discussed for different types of wastewater, viz. industrial soluble non-complex wastewaters, SS-rich complex wastewaters and domestic sewage. The paper not only deals with the UASB-reactor design, but also with other treatment steps, pre- as well as post-treatment, that are required for as complete as possible overall wastewater purification.

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    • "The sludge production is also minimal, and additional important benefit is that the anaerobic sludge can be preserved while not being fed for long periods of time at temperature below 15 °C [1]. The feasibility of the up flow anaerobic sludge blanket reactors UASB for adequate sewage treatment has been investigated since 1980 at both pilot and full scale installations [2], but at the moment, it is largely restricted to countries with a relatively cold climate [3]. The anaerobic fluidized bed and the expanded granular sludge bed reactors, with HRTs of about 2–4 h [4] and the UASB reactor, with an HRT of 4–8 h [5] offer good results, while the attached growth process named anaerobic filter needs a longer HRT on assuming constant organic loading rates for all systems. "
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    ABSTRACT: The fluidized bed UASB performance was studied in this experiment as a primary unit the anaerobic unit the advantage of better generated sludge characteristics and smaller tank volume.
    Preview · Article · Apr 2015
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    • "The highlights of UASB include high organic loading rates (OLRs), low operational costs, and energy recovery in the form of methane. UASB reactors are especially preferred for treating highly polluted industrial wastewaters because of their high chemical oxygen demand (COD) removal capacity (Lettinga and Hulshoff Pol, 1991; Rajeshwari et al., 2000). However, the effluent from the UASB treatment of such high-strength industrial wastewater still contains high concentrations of organic compounds. "
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    ABSTRACT: This study evaluated the performance of a novel treatment system consisting of an upflow anaerobic sludge blanket (UASB) and a downflow hanging sponge (DHS) for the treatment of industrial wastewater containing 8% ethylene glycol and 2% propylene glycol discharged from a rubber production unit. The system achieved high COD removal (91 ± 4.3%) and methane recovery (82 ± 20%) at an organic loading rate of 8.5 kg-COD/(m3•day). The UASB allowed an organic loading rate of 14 kg-COD/(m3•day) with a constant hydraulic retention time of 24 h. The COD of DHS effluent was 370 ± 250 mg-COD/L during the entire experimental period. Thus, the proposed system could be applicable for treating industrial wastewater containing ethylene glycol. Massively parallel 16S rRNA gene sequencing elucidated the microbial community structure of the UASB. The dominant family Pelobacteriaceae could mainly degrade the organic compounds of ethylene glycol and decomposed products of ethanol. In Archaea, the hydrogenotrophic methanogen family Methanobacteriaceae was predominant in UASB granular sludge.
    Preview · Article · Jan 2015 · Journal of Water and Environment Technology
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    • "el principal residual generado cuando se produce etanol por fermentación-destilación a partir de melazas o jugos de caña de azúcar (Moraes y col. 2014). La digestión anaerobia aparece como una alternativa interesante en el tratamiento de las vinazas; dentro de este proceso los reactores UASB tienen un amplio uso en el tratamiento aguas residuales (Lettinga y col. 1991) y han sido muy empleados en el tratamiento de vinazas. Por otro lado han sido ampliamente estudiados los FBR en el tratamiento de residuales solubles. El objetivo de la presente investigación fue evaluar el desempeño del proceso anaerobio en un sistema de reactores en serie conformado por un UASB y un FBR cuando se trata vinazas en rég"

    Full-text · Conference Paper · Nov 2014
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