Biological anaerobic reaction Process technology

Process Introduction

Star-ic internal circulation Anaerobic reactor is based on the biological anaerobic reaction of the basic principles and engineering practice, by the company headquarters expert team based on years of practical experience in the development and design completed. The utility model has the advantages of conventional high efficiency anaerobic reactor, at the same time, through hydraulic simulation and structural improvement, it realizes more optimized cloth water effect, more perfect anti-pollution plugging, anti-scaling design and calcium sludge collecting and discharging system, and improves the water quality adaptability of high efficiency anaerobic reactor equipment. The stability and reliability of the process system are improved.

■ star-ic principle of internal circulation anaerobic reaction technology

The waste water enters the lower high load area of the Star-ic anaerobic reactor through the water distribution system, and the granular sludge is fully mixed and mass-transfer, which decomposes most of the organic matter in the waste water and produces a lot of biogas. When the methane is passed through the lifting device, as a result of the lifting of methane, methane gas, together with a portion of the mixture, is lifted to the top of the tank, the methane is separated from the gas-liquid separator, and the separated mixture is then returned through the reflux to the bottom of the tank, mixed with the inlet into the Star-ic anaerobic reactor, Formed the inner circulation of the anaerobic tank itself. Waste water through the lifting device into the upper low load area (fine treatment zone), further degradation of the organic matter in the waste water, the mixture through the upper three-phase separator for granular sludge, water, methane separation, methane through the biogas pipeline, sludge is returned to the bottom of the anaerobic tank to maintain biomass, And after the precipitation of water through the weir into subsequent structures.

Main technological advantages of internal circulation anaerobic reactor:

1) Small footprint, save investment costs, the reactor volume load rate of three times times higher than the ordinary UASB, its volume is equivalent to the 1/4-1/3 of ordinary reactors, greatly reducing the reactor infrastructure investment, and Star-ic reactor high diameter ratio is very large (generally 4-8), so covers an area of special province. It also facilitates the collection of biogas.

2 The organic load is high, the hydraulic residence time is short, the investment is more economical;

3 rely on the promotion of methane production of internal automatic circulation, do not need external power to stir mixing and sludge reflux, save power consumption;

4 Strong impact load performance, high processing efficiency;

5 high volume load, high concentration of sludge in Star-ic anaerobic reactor, large amount of microorganism, and internal circulation, good mass transfer effect, influent Organic load can exceed 3 times times of ordinary anaerobic reactor. Moreover, the water section of the cloth is small, the water is convenient, the mixing effect is good, and the volume utilization is high.

6 has the ability to buffer the ph, the internal circulation flow equivalent to the 1th anaerobic region of effluent reflux, can use the alkalinity of the conversion of cod, to the ph buffering effect, so that the reactor ph to maintain the best state, but also reduce the amount of alkali water intake;

7) The effluent stability is good, the use of two-stage UASB series-Graded anaerobic treatment can compensate for the adverse effects of KS high in anaerobic process. The reactor grading can reduce the effluent VFA concentration, prolong the living time and stabilize the reaction.

8 The start-up cycle is short, the Star-ic anaerobic reactor has high sludge activity and rapid biological multiplication, which provides favorable conditions for fast start-up of the reactor.

9 The biogas utilization value is high, the biological gas produced by the reactor is high purity;

Our company based on the basic principle of internal circulation anaerobic reactor, through continuous hydraulic simulation and structural design optimization, the traditional internal circulation anaerobic reactor under impact, calcification, low temperature conditions of the technical constraints, to achieve a more dedicated and targeted Low-temperature IC process system, salt-tolerant IC process system, High calcium water anti-scaling IC process system, and so on, also ensure efficient removal rate to meet the needs of customers in various industries. Star-ic unique advantages of the process:

1) proprietary water distribution system

The reactor inlet pipe is provided with a regulating valve and a flowmeter, and the symmetrical arrangement of both ends of the tower body is used for water distribution. In order to balance the inflow water, the water discharge device adopts swirl tangent inlet form, the bottom of the tower is provided with the reflective vertebral body, and the water-cut jet is distributed evenly around the bottom of the tower; In order to improve the reaction rate, the wastewater should be fully distributed evenly in the cross section of the reaction zone, and the mixing intensity would be great, which would be helpful to the full contact between the pollutant and granular sludge.

2) Special anti-low temperature system

The effect of temperature on anaerobic digestion is mainly on the digestion rate. Star-ic anaerobic reactor through a more reasonable anaerobic reaction environment to create, the reaction process to achieve a richer microbial phase coexistence, the impact of temperature on anaerobic digestion is no longer significant and serious, combined with more targeted Process Control program, Usually star-ic reactor anaerobic digestion under the more general temperature conditions (25-38 ℃) can be effectively carried out, which reduces the cost of anaerobic insulation or heating, saving energy.

3) improved resistance to high salt, high calcium water anti-scaling technology system

Our company based on the basic principle of internal circulation anaerobic reactor, through the optimization and improvement of the internal structure of the tower to achieve more effective pollution-resistant, anti-scaling proprietary scheme. On the basis of the original optimized water distribution system, further optimization of the internal circulation system design, the powerful internal circulation dilution of water at the same time enhance the reactor's rising velocity, anaerobic sludge in the vertical direction of expansion, anaerobic microorganisms and matrix fully contact and achieve good mass transfer effect, and strengthen the three-phase separator structure optimization, Enhance the effective separation of gas, solid and liquid. In view of the characteristics of high calcium wastewater easily scaling and easy fouling, this paper strengthens the overall design of high-pressure flushing function, and sets up the calcium sludge blowing and discharging mechanism to enrich the operation control measures. Unique adaptive design combined with external circulatory system and other external systems process adjustment changes, the whole improved Star-ic process system can be used for high salinity wastewater can still maintain a good removal effect, and effectively reduce the accumulation of calcium, to prevent pipeline scaling.

photo of Star-ic highly efficient anaerobic reactor: