UASB treatment Articles

  • Performance and Economics of Large Scale UASB Sewage Treatment Plants

    This article evaluates the performance of 10 large scale upflow anaerobic sludge blanket (UASB) sewage treatment plants (STP), located in Brazil (7), India (2) and the Middle East (1). In general the performance of the UASB plants located in Brazil was excellent with COD removal rates ranging between 50 and 77%. In comparison the performance of the two plants located in India was poor with COD ...


    By IWA Publishing

  • Characteristics of thermophilic granulation processes in UASB reactors

    Thermophilic granulation processes were examined with synthetic wastewaters and were compared with the parallel mesophilic ones. The results indicated that granules could be formed well under compatible thermophilic surroundings in both carbohydrate- and protein-rich substrates. Compared with the mesophilic process, thermophilic granulation took relatively longer time, but thermophilic UASB ...


    By Inderscience Publishers

  • Textile effluent treatment in a UASB reactor followed by submerged aerated biofiltration

    An upflow anaerobic sludge bed (UASB)-submerged aerated biofilter (SAB) system that treats effluents from a jeans factory was evaluated. The 210-day operational period was divided into three phases (PI, PII and PIII), each with a different hydraulic retention time (HRT in h) and organic loading rate (OLR in kg COD/m3.d). In PI, the best performance was achieved using the UASB (HRT 24, OLR 1.3) ...


    By IWA Publishing

  • High-rate anaerobic treatment of distillery spentwash using UASB and UAHR

    Performance of upflow anaerobic sludge blanket and upflow anaerobic hybrid reactor in treatment of distillery spentwash was investigated under similar operating conditions. The reactors were initially fed with distillery spentwash having an average COD concentration of 1,22,000 mg L –1 with a HRT of 10 days and their performance was evaluated by operating at various HRTs viz., 10, 8, 7, 6, 5 ...


    By Inderscience Publishers

  • UASB-CFID system: energy efficient technology for sewage treatment and reuse

    The UASB-CFID system was investigated through laboratory experiments as an alternative method of treatment to existing UASB based STPs for the treatment. Excellent quality effluent was obtained having BOD and TSS below the disposal standards of India. In conventional treatment methods, lot of energy is wasted and also they generate harmful byproducts. The estimated life cycle cost of UASB-CFID ...


    By IWA Publishing

  • Influence of hydraulic retention time on UASB post-treatment with UF membranes

    A pilot UASB reactor coupled with an external ultrafiltration (UF) membrane was operated under three different hydraulic retention times (HRT) for domestic wastewater treatment. The aim was to assess the HRT influence on system performance and fouling. The highest concentrations of COD, total solids, extracellular polymeric substances (EPS) and soluble microbial products (SMP) in UASB effluent ...


    By IWA Publishing

  • Modification of UASB reactor by using CFD simulations for enhanced treatment of municipal sewage

    Up-flow anaerobic sludge blanket (UASB) has been in use since last few decades for the treatment of organic wastewaters. However, the performance of UASB reactor is quite low for treatment of low strength wastewaters (LSWs) due to less biogas production leading to poor mixing. In the present research work, a modification was done in the design of UASB to improve mixing of reactor liquid which ...


    By IWA Publishing

  • Enhancement of a UASB-septic tank performance for decentralised treatment of strong domestic sewage

    The possibility of enhancing the process performance of the UASB-septic tank for treating strong sewage in Palestine by means of inoculating the reactor with well adapted anaerobic sludge and/or adding a packing media to the upper part of the reactor, creating an anaerobic hybrid (AH)-septic tank, was investigated. To achieve these objectives, two community onsite UASB-septic tank and AH-septic ...


    By IWA Publishing

  • Anaerobic hybrid reactor: a promising technology for treatment of distillery spent wash

    A laboratory-scale study was conducted to investigate the performance of anaerobic hybrid (combining sludge blanket and filter) and UASB (Upflow Anaerobic Sludge Blanket) reactors for the treatment of distillery spent wash. The start-up and granulation study demonstrated that early start-up and granulation were achieved in case of hybrid reactor (45 days) as compared with UASB reactor (60 days). ...


    By Inderscience Publishers

  • Evaluation of polishing of the effluent from UASB reactor by diffusers

    Effluents from bench scale 56 L upflow anaerobic sludge blanket (UASB) reactor and four UASB based sewage treatment plants (STPs) of capacities ranging from 27 ML/d to 70 ML/d were aerated in batch as well as in continuous mode of operation. The process was monitored by measuring temporal trend in Oxidation Reduction Potential (ORP), dissolved oxygen (DO), chemical oxygen demand (COD) and ...


    By Inderscience Publishers

  • Anaerobic treatment of strong sewage by a two stage system of AF and UASB reactors

    An anaerobic treatment system that consists of an Anaerobic Filter (AF) and an Upflow Anaerobic Sludge Blanket (UASB) in series was built and operated to investigate its performance in treating strong domestic wastewater with high suspended solids fraction under Jordan's ambient temperatures of 25°C for summer and 18°C for winter. The system was operated from September 2003 until early April ...


    By IWA Publishing

  • Up Flow - Anaerobic Sludge Blanket Reactor (UASB)

    About Anaerobic Wastewater Treatment Anaerobic Wastewater Treatment is a wastewater treatment system using biology that without using of air or oxygen. It aimed to remove organic pollution in wastewater, slurries and sludge. Anaerobic microorganisms convert organic pollutants into a “biogas” which contains methane and carbon dioxide.1 About Up ...


    By IWA Publishing

  • Upgrading of sewage treatment plant by sustainable and cost-effective separate treatment of industrial wastewater

    The Olburgen sewage treatment plant has been upgraded to improve the effluent quality by implementing a separate and dedicated treatment for industrial (potato) wastewater and reject water. The separate industrial treatment has been realized within a beneficial public-private partnership. The separate treatment of the concentrated flows of industrial wastewater and sludge treatment effluent ...


    By IWA Publishing

  • Alternative biological systems for the treatment of vinasse from wine

    This work studied alternative treatment schemes for the vinasse wastewater from wine distilleries aiming at overcoming the problems caused by the high nitrogen and sulfur concentrations. A plexiglas laboratory-scale upflow anaerobic sludge blanket (UASB) reactor of 20 L volume that was operated at 45°C and hydraulic retention time 1 d, was included in all the examined systems. System 1 was the ...


    By IWA Publishing

  • Novel Hybrid PBR-UASB System for the Treatment of Highstrength Pet Food Wastewater

    ABSTRACTPet food industrial wastewater contains high concentration of oil and grease (O&G) which is difficult to treat using conventional biological systems. In this study, anaerobic treatability of pet food wastewater was evaluated in a hybrid packed bed reactor-upflow anaerobic sludge blanket (PBR-UASB) treatment system. The PBR was packed with sol-gel/alginate beads containing immobilized ...

  • Performance of UASB based sewage treatment plant in India: polishing by diffusers an alternative

    In India, recently, upflow anaerobic sludge blanket (UASB) based sewage treatment plants (STPs) have come up in a big way. Sequence adopted: screens- grit chambers- UASB reactors followed by one-day detention ponds (DP). Performance of DPs located at five STPs (27–70 ML/d) was evaluated over a period of one year from July 2004 to July 2005. The installation of these non-algal ponds reduced land ...


    By IWA Publishing

  • Anaerobic effluent treatment at a chemical industrial complex

    In order to test the feasibility of anaerobic treatment of an effluent from a chemical factory producing intermediates for synthetic fibres, test work with a 45 l UASB pilot plant was conducted. After conducting a successful pilot study a full-scale anaerobic effluent treatment plant including a 400 m3 combined buffer/pre-acidification tank and a 990 m3 Biopaq®-UASB reactor was constructed. The ...


    By Paques Technology B.V.

  • Evaluation of sludge properties in a pilot-scale UASB reactor for sewage treatment in a temperate region

    In this study, continuous operation of a pilot-scale upflow anaerobic sludge blanket (UASB) reactor for sewage treatment was conducted for 630 days to investigate the physical and microbial characteristics of the retained sludge. The UASB reactor with a working volume of 20.2 m3 was operated at ambient temperature (16–29 °C) and seeded with digested sludge. After 180 days of operation, when the ...


    By IWA Publishing

  • Grey water treatment in upflow anaerobic sludge blanket (UASB) reactor at different temperatures

    The treatment of grey water in two upflow anaerobic sludge blanket (UASB) reactors, operated at different hydraulic retention times (HRTs) and temperatures, was investigated. The first reactor (UASB-A) was operated at ambient temperature (14–25 °C) and HRT of 20, 12 and 8 h, while the second reactor (UASB-30) was operated at controlled temperature of 30 °C and HRT of 16, 10 and 6 h. The two ...


    By IWA Publishing

  • Treatment of slaughterhouse wastewater in upflow anaerobic sludge blanket reactor

    The performance of an upflow anaerobic sludge blanket (UASB) reactor operated at ambient temperature (20.9–25.2°C) was analysed for the treatment of slaughterhouse wastewater previously pre-treated for solid separation. The experimental work was carried out in a reactor with 15 L effective volume. Four organic loads were applied and the process performance was evaluated. The COD removal rate ...


    By IWA Publishing

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