IC reactor is a new type of anaerobic reactor after UASB and EGSB, the wastewater to be treated is pumped into the reactor using an efficient water distribution system from the bottom of the reactor and mixed with anaerobic granular sludge inside the reactor. The IC anaerobic reactor is composed of two UASB reactors stacked in series, with a height of 16-25m and a height to diameter ratio of 4-8, It mainly consists of 5 parts: water distribution area, first reaction chamber, second reaction chamber, internal circulation system, and effluent area, the internal circulation system is the core structure of the IC process.

The unique internal circulation system of the IC anaerobic reactor enhances the mass transfer between organic matter and granular sludge in wastewater, thereby significantly increasing the COD volumetric load of the reactor, the organic load of the IC anaerobic reactor is about three times that of a regular UASB reactor, and the reactor can achieve lower hydraulic retention time while ensuring removal efficiency. The IC anaerobic reactor is actually a special type of airlift reactor, with its lifting power coming from the self-produced biogas in the reactor. This way, the reactor does not need to achieve forced circulation through external forces, saving energy consumption. The formation of the internal circulation system in the reactor causes the actual water volume in the first reaction chamber to be much greater than the inlet water volume. The internal circulation water dilutes the inlet water, improving the reactor’s impact resistance and acid-base regulation ability. When treating the same wastewater, the volumetric load of IC anaerobic reactor is about 3-4 times that of ordinary UASB, so its required volume is only 1/4 to 1/3 of UASB, which is beneficial for saving infrastructure investment. Moreover, IC anaerobic reactor has a large aspect ratio and a very small footprint.

Product composition　It is similar to being formed by connecting two layers of UASB reactors in series. According to functional division, the reactor is divided into 5 sections from bottom to top: mixing section, 1st anaerobic section, 2nd anaerobic section, sedimentation section, and gas-liquid separation section.

1.Mixing section: The sludge water mixture from the bottom of the reactor, granular sludge, and gas-liquid separation section reflux is effectively mixed in this section.

2.The first anaerobic section: The mud water mixture formed in the mixing section enters this section, and under the action of high concentration sludge, most of the organic matter is converted into biogas. The upwelling of mixed liquor and the violent disturbance of biogas make the sludge in this reaction section appear in a state of expansion and fluidization, which strengthens the contact between the sludge and water surface, and thus the sludge maintains high activity. With the increase in biogas production, a portion of the mud water mixture is lifted by biogas to the gas-liquid separation section at the top.

3.Gas-liquid separation section: The biogas in the lifted mixture is separated from the muddy water and exported to the treatment system. The muddy water mixture returns to the bottom mixing section along the reflux pipe, and is fully mixed with the sludge and influent at the bottom of the reactor, achieving internal circulation of the mixed liquid.

4.2nd anaerobic section: The wastewater treated in the 1st anaerobic section, except for a portion that is lifted by biogas, enters the 2nd anaerobic section through a three-phase separator. The sludge concentration in this area is relatively low, and most of the organic matter in the wastewater has been degraded in the first anaerobic section, resulting in less biogas production. Biogas is introduced into the gas-liquid separation section through a biogas pipe, with minimal disturbance to the second anaerobic section, providing favorable conditions for sludge retention.

5.Sedimentation section: The mud water mixture in the second anaerobic section undergoes solid-liquid separation in the sedimentation section. The supernatant is discharged from the outlet pipe, and the precipitated granular sludge returns to the sludge bed in the second anaerobic section.

Product Advantage

1. High volumetric load

2. Save investment and area coverage

3. Strong resistance to shock loads

4. Strong resistance to low temperatures.

5. Ability to buffer pH values

6. Internal automatic circulation, no additional power required

7. Good effluent stability

8. Biogas has high utilization value.

Scope of application　Suitable for high concentration organic wastewater. Such as corn starch wastewater, citric acid wastewater, beer wastewater, potato processing wastewater, and alcohol wastewater.