Production and supply of IC anaerobic reactor

IC anaerobic reactor is a new-type following UASB and EGSB anaerobic reactor.It through the upper and lower two layers of gas collecting cover the reactor was divided into two rooms, two room through inner loop device together.


Into IC anaerobic reactor to digest organic matter most in the next reaction chamber, the biogas were cut off the lower gas-collecting hood to collect into the riser, riser fluid density difference inside and outside, keeps fermented liquid was promoted to the gas-liquid separator, the separation of gas and then back into the reaction chamber, formed a continuous cycle of fermented liquid.

In view of the inner loop occurs in the reaction chamber, so the reaction chamber under high hydraulic loading, high hydraulic loading and high yield gas load with organic sludge mixed fully, make the sludge in the expansion of the full state, the mass transfer rate is high, greatly improving the anaerobic digestion rate and organic load.


Reaction chamber is reactor on low load area, it is just the digestive reaction chamber under small amounts to digest organic matter, biogas production.Circulate in gas load is low, not into the reaction chamber, produce gas reaction chamber on low load and low hydraulic load of sludge settling and retention, which can maintain high sludge concentration in the reactor.


Due to anaerobic digestion rate depends on the sludge concentration and mass transfer rate, factors influencing the mass transfer is the gas load and hydraulic load, on the one hand, they are important factors of strengthening mass transfer, is the root cause of resulting in the loss of the sludge, and IC anaerobic reactor with inner loop device, changed the direction of gas load and hydraulic load, can avoid the loss of sludge under high load, to a certain extent, to achieve the "high load and sludge loss separation", so that the IC anaerobic reactor has higher than UASB and EGSB organic load.


1, has the very high volume load rate of IC anaerobic reactor due to there is a strong inner loop, good mass transfer effect, dry biomass.The feed rate is far higher than ordinary UASB reactor, generally about three times higher.Treatment of high concentration organic wastewater, when the COD is 10000-15000 mg / 1, the volume load rate can reach 15-30 kgcod/m3?.


2, strong shock load capacity Due to the IC reactor to realize its own inner loop, circulation can reach 10-20 times of water.Because of circulating water and water mix at the bottom of the reactor, the reactor at the bottom of the organic matter concentration is reduced, so as to improve the impact resistance load capacity of the reactor: big water also enabled the bottom sludge to inflation at the same time, to ensure the full contact reaction of organic matter and microbial wastewater, improve the processing load.


3, the water stability performance is good Because IC reactor is up and down two series operation of UASB reactor, the following a reactor has the very high organic load rate, crude processing effect, the load is low, a reactor above fine treatment effect, make the water quality is good and stable.


Three, IC anaerobic reactor operation technical measure is to citric acid wastewater treatment engineering of IC anaerobic reactor operation technical indicators, for example: from the technical instructions of the function of IC anaerobic reactor analysis of IC anaerobic reactor, high removal rate of COD volume load, high gas production rate, low operating cost, economic benefit is obvious, more suitable for the high concentration in the wastewater treatment engineering.


The development of anaerobic technology


Wastewater, especially high concentration organic wastewater anaerobic biological treatment technology, due to the relatively aerobic biological treatment has the incomparable advantage, has been the hot topics in the study of high concentration organic wastewater treatment technology.Anaerobic biological treatment technology of wastewater is a kind of biological treatment technology, to improve the efficiency of anaerobic treatment rate and, in addition to the growth of anaerobic microbe to provide a good environment, high sludge concentration in the reactor and a good mass transfer effect is extremely critical.The development of anaerobic technology has experienced three stages roughly:


(1) of the first generation represented by anaerobic touch the anaerobic reactor and sludge retention time (SRT) in equal and hydraulic retention time (HRT), sludge concentration in the reactor is low, treatment effect is poor.In order to achieve better treatment effect, wastewater in the reactor are usually to stay for a few days to a few days.


(2) the second generation of the represented by UASB anaerobic reactor, rely on the formation of granular sludge and the role of the three-phase separator, make the sludge in the reactor were stranded, implements the SRT > HRT, to a certain extent to improve the sludge concentration in the reactor, the reactor of the mass transfer process, however, is not ideal.To improve the mass transfer effect, is the most effective ways to improve the surface hydraulic load and surface gas load.However high load produced by vigorous agitation and can make the sludge is in a state of complete expansion in the reactor, sludge excess loss, have to rely on the sludge flooded back to increase biomass, make originally to SRT = HRT, SRT > HRT treatment effect.


(3) as a typical representative of the third generation of anaerobic reactors, my company research and development by BIC, on the basis of the second generation of anaerobic reactors is optimized design, absorb its advantage, overcome its shortcomings, formed the leading domestic industry, have their distinct characteristics of anaerobic treatment reactor.BIC has low investment, less land, high load, impact resistance, low operating cost, and stable operation, etc.


UASB and BIC comparison of two generations of anaerobic reactor


A, UASB reactor


UASB is the upflow anaerobic sludge bed reactor, the reactor main body can be divided into two areas: the reaction gas, liquid and solid phase separation areas.Sewage through the pump to the bottom of the anaerobic reactor, using the cloth at the bottom of the water system of sewage evenly arranged on the whole cross section, using the outlet pressure of the water and gas at the same time, make the wastewater with high concentrations of anaerobic sludge fully contact and mass transfer, the organic matter degradation in waste water.Waste water slowly increase the reaction area, further degradation of organic matter.Gas, water and sludge in the process of rising at the same time, the biogas into the three-phase separator internal discharge through the pipe first, sludge and waste water through the cracks of the three-phase separator to separate area, sludge in separation area precipitation enrichment and return to the lower part of the three-phase separator, maintain anaerobic reactor biomass, precipitation of water through the pipe outside the tank