upflow anaerobic sludge blanket Articles

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 ...

Aug. 18, 2014

By Inderscience Publishers

Simulation of granulation index and its utility for predicting percentage granules in UASB reactors

This paper researches on the development of a dimensionless number for predicting percentage granulation in Upflow Anaerobic Sludge Blanket (UASB) reactors for treating biodegradable wastewaters. A Biomass Granulation Index (BGI) has been framed based on the experimental work conducted using laboratory scale UASB reactors. This index depends on mixing in the sludge bed, induced due to biogas and ...

Feb. 26, 2010

By Inderscience Publishers

Anaerobic digestion of Organic Fraction of Municipal Solid Waste (OFMSW) in two-phase system

In view of recovering energy resource from the treatment of Organic Fraction of Municipal Solid Waste (OFMSW), anaerobic digestion of OFMSW prior to aerobic composting as post-treatment was considered. This study aimed to determine the operational characteristics and efficiency of a two-phase system composed of a fed-batch hydrolysis reactor (phase I) and a methanogenic Upflow Anaerobic Sludge ...

Dec. 12, 2011

By Inderscience Publishers

A built-in zero valent iron anaerobic reactor to enhance treatment of azo dye wastewater

Waste scrap iron was packed into an upflow anaerobic sludge blanket (UASB) reactor to form a zero valent iron (ZVI) - UASB reactor system for treatment of azo dye wastewater. The ZVI acted as a reductant to decrease ORP in the reactor by more than 40 mv and functioned as an acid buffer to increase the pH in the reactor from 5.44 to 6.29, both of which improved the performance of the anaerobic ...

Feb. 1, 2011

By IWA Publishing

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 ...

Dec. 12, 2011

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 ...

May 1, 2010

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). ...

Oct. 11, 2010

By Inderscience Publishers

The use of the anaerobic baffled reactor for wastewater treatment: A review

A review concerning the development, applicability and possible future application of the anaerobic baffled reactor for wastewater treatment is presented. The reactor design has been developed since the early 1980s and has several advantages over well established systems such as the upflow anaerobic sludge blanket and the anaerobic filter. These include: better resilience to hydraulic and organic ...

Aug. 1, 1999

By United Utilities

Biomass granulation in an upflow anaerobic sludge blanket reactor treating 500 m3/day low-strength sewage and post treatment in high-rate algal pond

A pilot-scale upflow anaerobic sludge blanket-moving bed biofilm (UASB-MBB) reactor followed by a high-rate algal pond (HRAP) was designed and operated to remove organic matter, nutrients and pathogens from sewage and to facilitate reuse. For an influent chemical oxygen demand (COD) concentration of 233 ± 20 mg/L, final effluent COD was 50 ± 6 mg/L. Successful biomass granulation was observed ...

May 29, 2017

By IWA Publishing

Use of hybrid reactor in treating cellulose wastewater

The purpose of this study was to investigate the operation and control of hybrid system in treating wastewater from Iran Wood Fibre Company located in the Caspian Sea. The specific objectives were to determine the effect of substrate concentration on COD removal rate. The experiments have shown three zero-order reactions for the first, first to fourth and fourth to seventh day for all influent ...

Nov. 8, 2007

By Inderscience Publishers

Effects of organic loading and oil-grease for the treatment of edible oil effluent in a pilot-scale upflow anaerobic sludge blanket process

In this study, Karadeniz Birlik Dogan Erdil vegetable oil factory, Elazig City, Turkey, was selected as representative of this sector. During the first part of the test programme, the quality of raw effluents was investigated. The removals of COD and oil-grease were above 85% at organic loadings between 1.62 and 7.83 kg COD m-3 d-1 at hydraulic retention times of 2.0 and 2.5 days. The conversion ...

Jan. 26, 2004

By Inderscience Publishers

A modular diagnosis system based on fuzzy logic for UASB reactors treating sewage

A modular diagnosis system (MDS), based on the framework of fuzzy logic, is proposed for upflow anaerobic sludge blanket (UASB) reactors treating sewage. In module 1, turbidity and rainfall information are used to estimate the influent organic content. In module 2, a dynamic fuzzy model is used to estimate the current biogas production from on-line measured variables, such as daily average ...

Mar. 31, 2016

By IWA Publishing

Microbial community characterization of an UASB treating increased organic loading rates of vitamin C biosynthesis wastewater

The microbial community of a mesophilic lab-scale upflow anaerobic sludge blanket (UASB) reactor treating vitamin C biosynthesis wastewater at gradually elevated organic loading rates (OLRs) was characterized using 16S rDNA-based polymerase chain reaction-DGGE (denatured gradient gel electrophoresis) analysis. The DGGE fingerprints suggested that the elevated OLRs did not cause any significant ...

Jan. 1, 2012

By IWA Publishing

Bacterial community involved in the nitrogen cycle in a down-flow sponge-based trickling filter treating UASB effluent

The bacterial community composition of a down-flow sponge-based trickling filter treating upflow anaerobic sludge blanket (UASB) effluent was investigated by pyrosequencing. Bacterial community composition considerably changed along the reactor and over the operational period. The dominant phyla detected were Proteobacteria, Verrucomicrobia, and Planctomycetes. The abundance of denitrifiers ...

Jun. 29, 2015

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 ...

Feb. 26, 2010

By Inderscience Publishers

Lipid Degradation in a Two-Phase Anaerobic SBR and Upflow Anaerobic Sludge Blanket

LCFAs, the intermediate products in lipid biodegradation are known to inhibit microorganisms by their toxicity and floatation. To reduce LCFA inhibition, two-phase anaerobic system, consisting of anaerobic sequencing batch reactor (ASBR) and upflow anaerobic sludge blanket (UASB) reactor, was applied to synthetic dairy wastewater. During 153 days of continuous operation, two-phase system showed ...

Oct. 21, 2006

By Water Environment Federation (WEF)

Performance of Upflow Anaerobic Sludge Blanket (UASB) reactor treating simulated wastewaters containing 1,1,2-Trichloroethane and 1,1,2,2-Tetrachloroethane

Reactors R2 and R3 were investigated for biodegradation of 1,1,2-Trichloroethane and 1,1,2,2-Tetrachloroethane respectively, during acclimation phase. Reactor R1 was maintained as control. The stepwise increment in concentration of 1,1,2-TCA from 5 mg/L to 40 mg/L in R2 caused no inhibition to reactor performance. The percentage of 1,1,2-TCA and COD removal was 99.9% and 98.6%, respectively. ...

Dec. 12, 2011

By Inderscience Publishers

Sequential UASB and dual media packed-bed reactors for domestic wastewater treatment – experiment and simulation

A wastewater treatment system composed of an upflow anaerobic sludge blanket (UASB) reactor followed by a packed-bed reactor (PBR) filled with Sorbulite® and Polonite® filter material was tested in a laboratory bench-scale experiment. The system was operated for 50 weeks and achieved very efficient total phosphorus (P) removal (99%), 7-day biochemical oxygen demand removal (99%) and ...

Mar. 31, 2016

By IWA Publishing

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 ...

Oct. 29, 2013

By IWA Publishing

The effect of operational conditions on the hydrodynamic characteristics of the sludge bed in UASB reactors

This work aims to evaluate the hydrodynamic properties of the sludge bed of Upflow Anaerobic Sludge Blanket (UASB) reactors based on its settleability and expansion characteristics. The methodologies used for the evaluation of the settleability of aerobic activated sludge, and for the expansibility of a sludge bed of Expanded Granular Sludge Bed reactors and Fluidised Bed Reactors were adapted ...

Jan. 1, 2011

By IWA Publishing

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