Who developed UASB reactor?
Lettinga
The UASB reactor was developed in the 1970s by Lettinga and his coworkers at the University for Agriculture at Wageningen in the Netherlands [11]. In the UASB reactor (Fig. 2.2C), the anaerobic bacteria form dense granules and it settles and remains as a blanket at the bottom of the reactor.
What is UASB ETP?
Upflow anaerobic sludge blanket (UASB) technology, normally referred to as UASB reactor, is a form of anaerobic digester that is used for wastewater treatment.
What are the advantages of UASB reactor?
Table 3
| Sr. number | References | |
|---|---|---|
| Advantages of UASB technology | ||
| (1) | Provides high removal efficiency even at high OLR and low temperature and therefore requires smaller reactor volume | [11, 70] |
| (2) | Simple construction and low operation and maintenance cost due to local availability of construction material and other parts | [84] |
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.
What is UASB system?
The upflow anaerobic sludge blanket reactor (UASB) is a single tank process. Wastewater enters the reactor from the bottom, and flows upward. A suspended sludge blanket filters and treats the wastewater as the wastewater flows through it.
What is UASB process?
The upflow anaerobic sludge blanket reactor (UASB) is a single tank process. Wastewater enters the reactor from the bottom, and flows upward. A suspended sludge blanket filters and treats the wastewater as the wastewater flows through it. High reduction of BOD. Can withstand high organic and hydraulic loading rates.
What is the ideal pH to be maintained for the UASB process?
between 6.3 and 7.85
Explanation: The pH value needs to be between 6.3 and 7.85 to allow bacteria responsible for anaerobic digestion to grow.
How does UASB reactor work?
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.
In which phase of UASB reactor high concentration of biomass contain?
Generally, during the treatment of UASB reactor, the substrate passes through an expanded sludge bed which containing a high concentration of biomass first. After that, the remaining part of substrate passes through a less dense biomass which named the sludge blanket.
What is a UASB reactor?
The UASB is a Centralized Treatment technology that must be constructed, operated and maintained by professionals. A skilled operator is required to monitor the reactor and repair parts, e.g., pumps, in case of problems. UASB reactors require several months to start up.
Can UASB be used in agriculture?
As all aerobic treatments, UASB require a post-treatment to remove pathogens, but due to a low removal of nutrients, the effluent water as well as the stabilised sludge can be used in agriculture.
Does UASB technology work for sewage treatment?
This paper highlights some inherent lacunae of UASB technology for sewage treatment based on a set of case studies, effluent data of UASB systems and a long-term monitoring of the performance of pilot plants in Kantapur (India). TARE, V. NEMA, A. (n.y): UASB Technology-expectations and reality.
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.