Two-phase Anaerobic Reactor
Anaerobic microorganism treatment is an indispensable treatment section in the current high concentration organic wastewater sewage water treatment process. It is better that aerobic microorganism treatment not only has low energy consumption, but also can produce biogas as a secondary use of energy. The higher the anaerobic reaction volume load is, the higher the oxygen reaction is, and the lower the investment is for treating the same amount of COD anaerobic reaction.
At present, the commonly used anaerobic treatment processes include:
UASB --- Up-flow Anaerobic Sludge Bed/Blanket
EGSB --- Expanded Granular Sludge Blanket Reactor
CSTR --- Continuous Stirred Tank Reactor
IC --- Internal Circulation Anaerobic Reactor
ABR --- Anaerobic Baffled Reactor
UBF --- Upflow Sludge Bed Filter
AF --- Anaerobic Biofilter
AFBR --- Anaerobic Fluidized Bed Reactor
USSB --- Upflow Staged Sludge Bed
AAFEB --- Anaerobic Attached microbial Film Expanded Bed
USR --- Upflow solid anaerobic reactor
PFR --- Plug Flow Reactor
Two-phase Anaerobic Reactor
Two-phase Anaerobic Reactor
Two-phase anaerobic process is a new type of anaerobic biological treatment process, that is, two independent reactors of acid-producing and methane-producing are connected in series to form a two-phase anaerobic fermentation system, namely a two-phase anaerobic fluidized bed, under their respective optimal environmental conditions.
Working Principle of Two-phase Anaerobic Reactor
Two-phase anaerobic digestion process enables acidification and methanation to be carried out in two series reactors respectively, so that acid-producing bacteria and methanogens can grow under the best environmental conditions, which is not only conducive to giving full play to their respective activities, but also improves the treatment effect, achieving the purpose of increasing the volumetric loading rate, reducing the reactor volume, and increasing the operation stability.
In traditional applications, acid-producing bacteria and methanogens are in a single reactor, and the balance between these two groups of bacteria is fragile. This is due to the great differences between the two microorganisms in physiology, nutritional requirements, growth speed and sensitivity to the surrounding environment. The stability and control problems encountered in traditional design applications force researchers to find new solutions.
The two-phase anaerobic digestion process separates the acidification and methanation stages into two series reactors, so that the acid-producing bacteria and methanogenic bacteria can grow under the best environmental conditions, which is not only conducive to giving full play to their respective activities, but also improves the treatment effect, achieving the purpose of increasing the volume loading rate, reducing the reaction volume, and increasing the operation stability.
Characteristics of Two-phase Anaerobic Reactor
1.The two stages of acid production and methane production are independent, and their respective reaction rates are increased.
2.The acidification reactor has a certain buffer effect to mitigate the impact of impact load on the subsequent methanogenic reactor.
3.The acidification reactor has fast reaction process, short hydraulic retention time, and COD concentration can be removed by 20% - 25%, which can greatly reduce the load of methanogenic reactor.
4.High load, small reactor volume and low capital construction cost.
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