What is upflow anaerobic sludge blanket reactor?
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What is upflow anaerobic sludge blanket reactor?
The upflow anaerobic sludge blanket reactor (UASB) is a single tank process in an anaerobic centralised or decentralised industrial wastewater or blackwater treatment system achieving high removal of organic pollutants . Wastewater enters the reactor from the bottom, and flows upward.
Which gas is produced from up flow anaerobic sludge blanket reactor system?
methane
About Up flow-Anaerobic Sludge Blanket Reactor (UASB) 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 COD loading rate assumed for an upflow anaerobic sludge blanket?
Explanation: The COD loading rate assumed for an Up flow anaerobic sludge blanket is 4-12 Kg COD/m3. In most cases it is considered as 6 Kg COD/m3. Based on this the volume of the upflow anaerobic sludge blanket is sized.
What is the significance of anaerobic sludge?
In anaerobic sludge digester the anaerobic bacteria the methanogen digest the flocks of bacteria and fungi in activated sludge and produce methane along with H2O and CO2 i.e. biogas which is a source of energy as it is inflammable.
Which of the following is are the advantages of up flow anaerobic sludge blanket UASB )?
The UASB reactor can be successfully applied for the anaerobic treatment of wastewater if well-settling biomass with high methanogenic activity is developed….23.7. 1 Upflow anaerobic sludge blanket (UASB) reactor.
| Advantages | Disadvantages |
|---|---|
| No need for support media | Restriction on nearly solids-free wastewater |
What is UASB technology?
The upflow anaerobic sludge blanket (UASB) process has been shown to be effective for removal of organic substances from sewage, especially under warm climate conditions.
Which of the following is an advantage of anaerobic digestion?
Anaerobic digestion (AD) collects methane and provides a source of renewable energy that is carbon neutral i.e. provides energy with no net increase in atmospheric CO2. Fertiliser – compared to undigested slurry, the nitrogen in digestate is more readily available as a plant nutrient.
What is upflow velocity?
Usually, the effects of upflow liquid velocity on anaerobic granulation are explained by the selection pressure theory (Hulshoff Pol et al., 1988). A long HRT accompanied with a low upflow liquid velocity may allow dispersed bacterial growth and be less favorable for microbe granulation.
What are the main advantages of anaerobic digestion of biomass?
Provide energy to the local grid. This can help the local utility meet growing energy demand with locally sourced renewable energy. Reduce greenhouse gas emissions by capturing methane gas that may otherwise have been lost to the atmosphere and by displacing fossil fuel energy use.
What are the major disadvantages of UASB?
UASB reactor schematic. A distinctive advantage of the UASB reactor is the very high loading rate achieved by the systems (Speece, 1996)….23.7. 1 Upflow anaerobic sludge blanket (UASB) reactor.
| Advantages | Disadvantages |
|---|---|
| Simple reactor construction | Sensitive response to organic shock loads |
What are the advantages and disadvantages of anaerobic treatment of wastewater?
Up-flow or down-flow anaerobic filters: suited to treating wastes containing organic matter in soluble form, which excludes many forms of municipal waste. It is more widely applied to treating industrial wastes. The main disadvantage of the anaerobic filter reactor is the high cost of the filter material.
What is the advantages of the anaerobic?
Anaerobic exercise helps boost metabolism as it builds and maintains lean muscle. The more lean muscle you have, the more calories you’ll burn during your next sweat session. High-intensity exercise is also thought to increase your post-workout calorie burn.
What is the COD reduction in conventional anaerobic sludge treatment?
For good biodegradability of any wastewater, a minimum BOD: COD ratio (BI) of 0.3-0.4 is considered to be ideal, with a ratio of ≥0.3 desirable for coupling with aerobic treatment and ≥0.4 for anaerobic treatment (Metcalf & Eddy, 2nd ed., 1979).
What are advantages and disadvantages of anaerobic respiration?
Anaerobic respiration has advantages and disadvantages: Advantages: Anaerobic respiration is relatively rapid, and it does not require oxygen. Disadvantages: Anaerobic respiration generates only two ATPs and produces lactic acid.
What are the advantages of anaerobic process?
The main advantages of anaerobic treatment are therefore that it: is a well-known and extensively applied process; is versatile for treating both ordinary and ‘difficult’ wastes; is a low-energy process, making it more environmentally friendly; and.
What are the advantages and disadvantages of anaerobic respiration?
What is are the advantages of anaerobic process over aerobic in the wastewater treatment?
Anaerobic treatment of wastewaters has a number of advantages over aerobic treatment process, namely, the energy input of the system is low, as no energy is required for oxygenation, lower production of excess sludge (biological synthesis) per unit mass of organic matter stabilized, lower nutrient requirement due to …
What are the advantages and disadvantages of anaerobic fermentation?
Advantages – aerobic is efficient, fermentation is fast, anaerobic requires no oxygen. Disadvantages – aerobic is slow, fermentation is inefficient, anaerobic produces bodily toxins (lactic acid, ethyl alcohol).
What are advantages of anaerobic respiration?
The advantage of anaerobic respiration is that it can be done without oxygen and it is a relatively rapid process. E.g. in muscles, when the oxygen supply is inadequate, pyruvic acid is reduced to lactic acid to get energy during intense activity.
