Upflow Anaerobic Sludge Blanket Reactors

Wastewater treatment especially by Biological system is considered to reduce the pollutant concentration. It does it through microbial coagulation and by removing non-settleable organic colloidal solids. UASB (Up flow anaerobic sludge blanket) technology reactor is a form of anaerobic digester. It is used for treating wastewater. A UASB reactor is a methane-producing digester. It is believed to use an anaerobic procedure and form a blanket of granular sludge and is processed by the anaerobic microorganisms.
Concept
UASB reactor is designed on the ground of the so-called three-phase separator. It enables the rector to split gas water and sludge mixtures under high turmoil situation. This allows for compact cheaper designs. This reactor necessarily has several gas covers to separate biogas. The larger amount of gas or water interfaces helps reduce turbulence to a great level making moderately high loading rates of 10 a 15 kg/m3.d possible. Separation in the UASB reactor needs just 1.0 meter of height. So it stops flotation effects and as a result floating layers.
Usually at some stage in the performance of UASB reactor the substrate first passes through an expanded sludge bed. This bed contains a high attentiveness of biomass. Then the left part of substrate passes through a less dense biomass. It is named the sludge blanket.
After this a peristaltic pump pumps the influent to the UASB reactor from bottom. By this way.