Which reactor is used for anaerobic biological treatment?
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 are anaerobic reactors?
Anaerobic reactors are mostly similar to aerobic reactors but a few conditions have to be considered for maintaining an anaerobic environment. This reactor is simple in construction with a high loading rate and can withstand high toxic and organic substances.
What is anaerobic contact reactor?
The anaerobic contact process is a type of anaerobic digester. The upflow anaerobic process is a large reactor which allows the waste to flow up from the bottom and separates the waste into 3 zones. At the very top is the biogas zone where the gas is collected.
What is anaerobic treatment system?
Anaerobic treatment is a proven and energy-efficient method for treating industrial wastewater. It uses anaerobic bacteria (biomass) to convert organic pollutants or COD (chemical oxygen demand) into biogas in an oxygen-free environment.
What is anaerobic baffled reactor?
An anaerobic baffled reactor (ABR) is an improved Septic Tank with a series of baffles under which the grey-, black- or the industrial wastewater is forced to flow under and offer the baffles from the inlet to the outlet . The increased contact time with the active biomass (sludge) results in improved treatment.
What is the difference between aerobic and anaerobic water treatment?
While both rely on a process of microbial decomposition to treat wastewater, the key difference between anaerobic and aerobic treatment is that aerobic systems require oxygen, while anaerobic systems do not. This is a function of the types of microbes used in each type of system.
What are different steps in anaerobic treatment for biogas generation?
There are four basic phases of anaerobic digestion, which is a synergistic process using anaerobic microorganisms: 1) hydrolysis, 2) acidogenesis, 3) acetogenesis, and 4) methanogenesis. Figure 12.2 shows the progression and types of products for each phase. Figure 12.2: Schematic of four phases of biogas production.
What are the two main products of anaerobic digestion?
Anaerobic digestion produces two valuable outputs: biogas and digestate.
What are the different stages of anaerobic wastewater treatment?
The anaerobic wastewater treatment process consists of two stages: an acidification phase followed by a methane production phase, with both processes occurring in dynamic equilibrium.
How can we use wetlands to treat sewage?
How is wastewater treated in constructed wetlands? As wastewaters flow through the system, suspended solids and trace metals settle and are filtered. Plants and organic material also absorb trace metals.
What is baffle reactor?
“The Anaerobic Baffle Reactor (ABR) is an improved septic tank, built with alternating baffles, which directs the wastewater to flow under and over it as the water moves from inlet to outlet” (SPUHLER 2010). Requires constant source of water. Need of secondary treatment due to low reduction pathogens.
What is an anaerobic baffled reactor?
One type of high-rate reactor is the anaerobic baffled reactor (ABR). Developed by McCarty and co-workers at Stanford University, the ABR was described as a series of upflow anaerobic sludge blanket reactors (UASBS) because it is divided into several compartments (3, 5, 16).
Can a combined reactor scheme be used for anaerobic digestion of dairy waste?
This study investigates the use a combined reactor scheme for the anaerobic digestion of dairy waste water, and the further upgrading of the biogas products from the process. A combination pilot scale process was established with a 90 d start-up time using a 1 m 3 continuous stirred tank reactor (CSTR) and a 0.2 m3 baffled reactor (ABR) in series.
What is the best reactor configuration for biohydrogen production from solid waste?
CSTRs and UASB reactors are the most widely used configurations for biohydrogen production from wastewater, but these configurations are not very suitable for biohydrogen production from solid waste because of the disadvantage of high solid residues that must be removed from the system.
What is an ABR septic tank?
ABRs are robust and can treat a wide range of wastewater, but both remaining sludge and effluents still need further treatment in order to be reused or discharged properly. Anaerobic baffled reactors (ABR) are septic tanks that have been upgraded with a series of baffles along the treatment chamber.