MIC anaerobic reactor

Multiphase internal circulation anaerobic reactor principle:

The MIC (Multi-Stage & Multiphase With Innercirculation Anaerobic System). Anaerobic reactor is a multi-stage multi-phase anaerobic treatment system with internal circulation, each reaction chamber is an independent reaction unit, and the system is composed of a plurality of independent reaction chambers. Thus, forming into a structure of biological phase separation.


The hydraulic flow in the single reaction chamber is fully mixed, and the hydraulic flow between the reaction chambers is close to the push flow type, pursuing higher removal efficiency and environmental impact load capacity, better effluent quality, and more stable anaerobic operating system, so that the system maintains a certain matrix concentration gradient, fully embodying the hierarchical multi-phase process idea.

The hydraulic flow in the single reaction chamber is fully mixed, and the hydraulic flow between the reaction chambers is close to the push flow type, pursuing higher removal efficiency and environmental impact load capacity, better effluent quality, and more stable anaerobic operating system, so that the system maintains a certain matrix concentration gradient, fully embodying the hierarchical multi-phase process idea.

MAIN FEATURES OF THE PROCESSING SYSTEM

(1) Achieving Modularized Structure

A modularized anaerobic process structure is formed, which fully reflects the easy expansion of the elastic combination. Because the entire reactor system is formed by a series of separate reaction chambers, each reaction chamber is a separate reaction unit.

(2) Excellent hydraulic state

The flow state between the reaction chambers of the system is the a force flow state, maintaining a certain substrate concentration gradient, and each reaction chamber is a mixed flow state to form a multi-phase anaerobic treatment system, which is beneficial to the anaerobic flora. This may improve the processing effect of the system and the stability of operation. The biological sludge can be fully mixed with the influent substrate to maintain a certain substrate concentration gradient to ensure that the anaerobic microorganism can fully degrade the matrix in the sewage.

(3) Excellent mixing state

The single reaction chamber has upper and lower reaction areas, and the gaseous internal circulation technology is used in the lower reaction area to achieve sufficient mixing contact between the biological sludge and the substrate mechanism, thereby greatly increasing the organic volumetric load. Due to the high organic load, the high-intensity circulating flow rate (which is several times the influent flow rate) is formed, and the high-yield biogas is generated, so that the reaction chamber is in an expanded fluidized state, and the purpose of full gas-lifting cycle agitation is achieved, and the strengthening is achieved. This could cause mass transfer efficiency of biochemical reactions.

(4) Excellent microorganism phase separation state

 

For a multi-phase anaerobic biological reaction system, the separated reaction chambers in the system can cultivate suitable anaerobic bacterial communities to adapt to their corresponding substrate components and environmental factors. The biological phase of each reaction chamber changes with the matrix and the environment, and the law of gradual change is regulated by the degree of degradation of the substrate, ensuring that the microorganisms in each reaction chamber have the best metabolic environment and metabolic activity, thereby achieving the best.

 

(5) Excellent sludge interception ability

In a separate reaction chamber, the three-phase separators in the upper and lower reaction zones allow the biological sludge to be effectively retained. The three-phase separator in the lower stage I reaction zone separates a large amount of biogas and water to create a good granular sludge sedimentation environment; therefore, the threephase separator of the upper stage-Il reaction zone can be effectively affected by the upward flow of biogas. The granular sludge and water are separated to achieve a good sludge interception effect, and the problem that the granular sludge is released out of the system under high sludge volume load is solved.

(6) High organic load

The organic load of the reactor is much higher than that of the UASB anaerobic reactor, which is 2 to 4 times of the UASB system. The inner circulation increases the rising flow rate of the lower reaction zone and enhances the mass transfer efficiency of the biological granular sludge and the substrate.

(7) Small reactor volume

The system has a high bioburden and greatly reduces the required space when processing the same wastewater. The volumetric load is four times that of the conventional UASB, and the required volume is 1/4 to 1/3 of the UASB.

(8) Individual collector for reactor chamber gaseous

The biochemical reaction of the reaction chamber at the front end of the system is mainly based on acid production, preventing acidification and the effect of hydrogen partial pressure on the anaerobic biochemical reaction process. Its gas production contains relatively more H2 and CO2 points, and its independent collection can reduce the H2  and CO2 partial pressures in other reaction chambers.

(9) Strong anti-impact load capacity

The internal circulation increases the rising flow rate of the lower reaction area, and the circulating water dilutes the influent water, increases the hydraulic shearing force and has excellent mass transfer efficiency. These mechanisms form the reactor with anti-impact load capacity and acid-base adjustment ability.

Performance comparison between MIC and UASB

The following comparisons are based on the comparison of the water quality of the IC-SMPA and UASB in the three reaction chambers.

MIC Anaerobic Reactor UASB Anaerobic Reaction
Construction Complexity Simple Construction Influent Equipment Complex
Architectural Characteristics With Internal Circulation, The Liquid Rises At A High Flow Rate, And The Sludge Bed Is In An Expanded State, Which Is Less Prone To Channeling And Dead Angles. Easy To Generate Channel And Dead Angle
Volume Load (normal Temperature) 2∼4 Times For Uasb --
Biological Phase Separation Yes No
Required Volume 1/4 ∼1/3 1
Impact Load Resistance Strong Weak
Hydraulic Flow Excellent (push Flow + Full Flow) General (mixed Flow)
Processing Stability +++ +
Water Quality After Treatment ++ +
Value For Money +++ (lower Initial Fee) +