What is Uasb in wastewater treatment?
Upflow anaerobic sludge blanket (UASB) technology, normally referred to as UASB reactor, is a form of anaerobic digester that is used for wastewater treatment. The UASB reactor is a methanogenic (methane-producing) digester that evolved from the anaerobic clarigester.
What is Uasb process?
Up flow anaerobic sludge blanket technology also known as UASB reactor is a form of anaerobic digester which used in wastewater treatment. UASB reactor is a methane-producing digester, which uses an anaerobicprocess and forming a blanket of granular sludge and is processed by the anaerobic microorganisms.
What is the working principle of upflow anaerobic sludge blanket reactor Uasb?
UASB uses an anaerobic process while forming a blanket of granular sludge which suspends in the tank. Wastewater flows upward through the blanket and is processed (degraded) by the anaerobic microorganisms. The upward flow combined with the settling action of gravity suspends the blanket with the aid of flocculants.
What is the product gases released at the end of UASB process?
The microorganisms in the sludge layer degrade organic compounds. As a result, gases (methane and carbon dioxide) are released.
What is the minimum hydraulic retention time for Uasb?
In the UASB process, the whole waste is passed through the anaerobic reactor in an upflow mode, with a hydraulic retention time (HRT) of only about 8-10 hours at average flow….
|HRT||8-10 hours at average flow (minimum 4 hours at peak flow)|
|SRT||30-50 days or more|
What is the size of the microbial granules?
Aerobically grown microbial granules are aggregates which are specified with regular shape (spherical, egg-shaped, or elongated oval in cross section); with size from 0.5 to several mm; with high-settling velocity from 0.2–2 cm/s; and with high density and sludge-to-volume index (SVI) ranging from 20–80 g/l.
What is the use of aeration tank?
Aeration tank is meant for agitating the liquid effluent from the primary settiling tank where the air is aloowed to pass through agitating mixture to make it aerobic.
What is the ideal pH to be maintained for the UASB process?
a ILmax, Maximum specific growth rate. b Y, Growth yield. treatment can proceed well at a pH range of 6.6 to 7.6 (16).
What is the means used for the mixing of the sludge in UASB reactor?
Explanation: The micro-organisms in the sludge layer degrade organic compounds. As a result, gases are released. The rising bubbles mix the sludge without the assistance of any mechanical parts.
What is hydraulic retention time?
The average amount of time that liquid and soluble compounds stay in a reactor or tank. It is calculated by dividing the volume of a reactor (e.g. m3) by the influent flow rate (e.t. m3/day).
What is UASB reactor technology?
Up flow anaerobic sludge blanket technology also known as UASB reactor is a form of anaerobic digester which used in wastewater treatment. UASB reactor is a methane-producing digester, which uses an anaerobicprocess and forming a blanket of granular sludge and is processed by the anaerobic microorganisms. 2
What is an up flow anaerobic sludge blanket reactor?
In conclusion, up flow Anaerobic Sludge Blanket (UASB) reactor is a form of anaerobic digester that is used in the treatment of wastewater. It’s typically suited to dilute waste water streams (3% TSS with particle size >0.75mm). As we had mentioned earlier, these are the 4 top applications of the reactors: Breweries and beverage industry
What is the average load of a UASB?
The average full-scale design loading of the UASB of 682 full-scale plants surveyed was 10 kg COD/m3.d. To reduce the plan area and to reduce the cost of land, GLS separator and influent distribution arrangement etc. the reactor should be as high as possible.