upflow anaerobic sludge blanket Articles

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. 25, 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. 11, 2011

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. 25, 2010

By Inderscience Publishers

Energy potential and alternative usages of biogas and sludge from UASB reactors: case study of the Laboreaux wastewater treatment plant

This work assessed the energy potential and alternative usages of biogas and sludge generated in upflow anaerobic sludge blanket reactors at the Laboreaux sewage treatment plant (STP), Brazil. Two scenarios were considered: (i) priority use of biogas for the thermal drying of dehydrated sludge and the use of the excess biogas for electricity generation in an ICE (internal combustion engine); ...

Dec. 28, 2015

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. 7, 2007

By Inderscience Publishers

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. 28, 2013

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. 10, 2010

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. 30, 2016

By IWA Publishing

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. 11, 2011

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 ...

Jan. 25, 2004

By Inderscience Publishers

Fouling membrane in an anaerobic membrane bioreactor treating municipal wastewater

An anaerobic membrane reactor (AnMBR) treating municipal wastewater was evaluated. The experiments were performed using a pilot-scale up-flow anaerobic sludge blanket reactor with a submerged tubular ultrafiltration membrane at a hydraulic retention time of 8 hours. The system worked at an intermittent filtration mode (4 min on/1 min off) with and without nitrogen gas bubbling during the ...

Dec. 31, 2016

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. 11, 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. 30, 2016

By IWA Publishing

Load limit of a UASB fed septic tank-treated domestic wastewater

Performance of a 250 L pilot-scale up-flow anaerobic sludge blanket (UASB) reactor, operated at ambient temperatures, fed septic tank effluents intermittently, was monitored for hydraulic retention time (HRT) from 18 h to 4 h. The total suspended solids (TSS), total chemical oxygen demand (CODT), dissolved chemical oxygen demand (CODdis) and suspended chemical oxygen demand (CODss) removal ...

Jul. 13, 2015

By IWA Publishing

Biological waste management of leather tannery effluents in India: current options and future research needs

This paper reviews the major biological treatment methods applied for tannery effluents in India. Anaerobic methods and activated sludge process have been the preferred treatment options. Sequencing batch reactor process holds promise for tannery effluents but the technology is yet to see the light of the day in India. Design of aerobic systems needs major overhaul through modelling approaches of ...

Jul. 19, 2009

By Inderscience Publishers

The performance of UASB reactors treating high-strength wastewaters

In the study reported here, the authors investigated the influence of hydraulic loading rate, organic loading rate, and recycle rate on the performance of upflow anaerobic sludge blanket (UASB) reactors treating high-strength wastewaters. For this purpose, they used two identical reactors. The removal rates for chemical oxygen demand (COD), total kjeldahl nitrogen (TKN), total phosphorus (TP), ...

Jan. 30, 2008

By National Environmental Health Association (NEHA)

Acid resistance of methanogenic bacteria in a two-stage anaerobic process treating high concentration methanol wastewater

In this study, the two-stage upflow anaerobic sludge blanket (UASB) system and batch experiments were employed to evaluate the performance of anaerobic digestion for the treatment of high concentration methanol wastewater. The acid resistance of granular sludge and methanogenic bacteria and their metabolizing activity were investigated. The results show that the pH of the first UASB changed from ...

Dec. 31, 2003

By Springer

Application of ADM1 to a UASB Treating Complex Wastewater in Different Feeding Regimes

Two upflow anaerobic sludge blanket (UASB) reactors treating dairy effluent were operated in a continuous mode and then were switched to an intermittent mode. In intermittent mode one reactor had 6 hours feeding followed by 6 hours non-feeding, while the other reactor had a period of 3 hours feed and a period of 9 hours without feed. During the experiment the reactors were subjected to different ...

May 6, 2007

By Water Environment Federation (WEF)

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 ...

Dec. 31, 2011

By IWA Publishing

Post-treatment of anaerobically pre-treated molasses wastewater in an aerobic granular sludge sequencing batch reactor

An aerobic granular sludge system was used for post-treatment of an Up-Flow Anaerobic Sludge Blanket (UASB) reactor treating molasses wastewater. The system was very effective in the treatment of the UASB reactor effluent. Up to 94.9-96.0% COD removals could be observed and it showed no signs of serious stress when subjected to high COD loads of 7.9 g l−1 d−1. The total nitrogen removals were in ...

Dec. 5, 2010

By Inderscience Publishers

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