Results 171 to 180 of about 21,861 (219)

A Review on Biohazards Removal in Ethiopia: Efficacy of Existing Treatment Systems and Challenges. [PDF]

open access: yesEnviron Health Insights
Yenew C   +4 more
europepmc   +1 more source

Anaerobic sewage treatment in a one-stage UASB reactor and a combined UASB-Digester system

open access: yesWater Research, 2004
The treatment of sewage at 15 degrees C was investigated in a one-stage upflow anaerobic sludge blanket (UASB) reactor and a UASB-Digester system. The latter consists of a UASB reactor complemented with a digester for mutual sewage treatment and sludge stabilisation.
Grietje Zeeman, Gatze Lettinga
exaly   +8 more sources

UASB reactor for domestic wastewater treatment at low temperatures: a comparison between a classical UASB and hybrid UASB-filter reactor

open access: yesWater Science and Technology, 2004
The performance of an upflow anaerobic sludge blanket (UASB) reactor and a hybrid UASB-filter reactor was investigated and compared for the treatment of domestic wastewater at different operational temperatures (28, 20, 14 and 10¡C) and loading rates. For each temperature studied a constant CODt removal was observed as long as the upflow velocity was ...
Michal Green
exaly   +4 more sources
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High strength sewage treatment in a UASB reactor and an integrated UASB-digester system

Bioresource Technology, 2008
The treatment of high strength sewage was investigated in a one-stage upflow anaerobic sludge blanket (UASB) reactor and a UASB-digester system. The one-stage UASB reactor was operated in Palestine at a hydraulic retention time (HRT) of 10h and at ambient air temperature for a period of more than a year in order to asses the system response to the ...
Nidal Mahmoud
exaly   +3 more sources

UASB-Process Design for Various Types of Wastewaters

open access: yesWater Science and Technology, 1991
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 ...
L W Hulshoff Pol, Lettinga G
exaly   +4 more sources

Upgrading combined anaerobic-aerobic UASB-FPU to UASB-DHS system: Cost comparison and performance perspective for developing countries

open access: yesJournal of Cleaner Production, 2021
This study determined the performance of upgraded sewage treatment plant (STP) based on an anaerobic-aerobic system consisting Up-flow Anaerobic Sludge Blanket (UASB) reactor, Final Polishing Unit (FPU) and Down-flow Hanging Sponge (DHS) system, treating
Mohd Aamir Mazhar   +2 more
exaly   +1 more source

Treatment of Brewery Effluent by UASB Process

Journal of Environmental Engineering, 1990
A five-month pilot study was conducted to examine the effectiveness of the upflow anaerobic sludge blanket (UASB) process for the treatment of effluent from a brewery in rural China. Results indicate that the process operated at 26°C could reduce over 89% of chemical oxygen demand (COD) and 92% of five-day biochemical oxygen demand (BOD\d5) from the ...
Fang, Herbert HP   +4 more
openaire   +2 more sources

Histological Analysis of Microstructure of UASB Granules

Journal of Environmental Engineering, 1994
A histological method was demonstrated for the microscopic analysis of granules from upflow-anaerobic-sludge-blanket (UASB) reactors. Granules were first fixed with formaldehyde and embedded in paraffin, before being sectioned by a microtone to a thickness of 3–5 pm.
Chui, HK, Fang, HHP
openaire   +2 more sources

Study on hydrogen production with hysteresis in UASB

Chemosphere, 2004
This paper uses a 10-l UASB (upflow anaerobic sludge blanket) bench-scale reactor to treat the esterification wastewater of a polyethylene terephthalate manufacturing plant. Two organic loading rates are used to evaluate the effect on H2 production of temperature gradually step-down and step-up in the range of 11-25 degrees C. Experimental results show
G H, Huang   +3 more
openaire   +2 more sources

An integral dynamic model for the UASB reactor

Biotechnology and Bioengineering, 1986
AbstractIn this article a dynamic model of a continuous working UASB reactor is described. It results from the integration of the fluid flow pattern in the reactor, the kinetic behavior of the bacteria (where inhibition and limitation were taken into account), and the mass transport phenomena between different compartments and different phases.
W L, Bolle   +4 more
openaire   +2 more sources

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