Organic compounds in the centrifugal extraction machine brewery wastewater treatment
In our country, agricultural and sideline products processing industry, food processing and beverage wastewater accounted for about 10%, as the country's economic adjustment, the enterprise structure to the direction of energy saving, high efficiency, then this kind of industrial wastewater is bigger and has a tendency to continue to increase.
This kind of wastewater of low pH, within the scope of the 4 ~ 7, COD but higher phosphorus concentration is low, the ordinary active sludge method process, prone to sludge bulking, lead to drain sludge and effluent COD is higher.
And when handling this kind of wastewater by biological technology, usually by adding nutrient to assure general microbial C, N and P ratios of the normal operation of the maintaining process.
But this way will not only increase the operation cost, and if adding the insufficient amount of poor treatment effect, adding the amount is too large, increased the phosphorus content of the water.
Therefore, it is necessary to establish a little or without adding nutrient elements a new biological treatment technology to solve the above problems.
mainly in liquor production is the production of white wine or alcohol, in the process of production, wine or alcohol to 14 - per 1 ton
16 m3 vinasse liquid, no liquid contains large amounts of organic matter, can be seen from the wastewater quality, wine or alcohol production after grains suspended solids concentration in the wastewater is high, about 20000 mg/L, organic matter concentration is very high also, generally up to 33000 ~ 35000 mg/L.
And beer wastewater produced in the process of production mainly for biochemical organic wastewater, but beer wastewater organic matter concentration of liquor or alcohol production wastewater is high, and in the beer production wastewater PH for 12 - commonly
the liquor, alcohol or beer production wastewater, organic matter content is higher, so for the brewery wastewater often use the solvent extraction method also can be recycled in the wastewater of organic matter, but as a result of liquor and alcohol in the production of organic matter is extremely high, so must be pretreated, economically feasible, adopt the way of anaerobic make large amounts of organic matter to generate biogas, using biogas energy to meet the need of power supply in the process of the wine;
If do not have power from the economic benefit, but will be a lot of slag containing organic matter by filtration or sedimentation separation, after the separation of slag can be used as feed.
After the separation of the liquid is mixed by solvent extraction and separation.
from the mixture of brewery wastewater by solvent extraction of active compounds in the operation of the known as liquid/liquid extraction.
Centrifugal extraction machine extraction is the use of components selected in the solution of the differences in the solubility of solvent, the solute of liquid-liquid mass transfer, in order to achieve the separation of homogeneous liquid mixture operation.
Raw material liquid mixed with the extracting agent fully contact, complete the solute mass transfer process;
weight according to certain proportion respectively from two two phase solution and feeding tube into the drum shell ring gap formed between the mixed zone, with the aid of the rotation of the drum, through the turbine disc and the impeller to make two phase mixing and dispersing quickly, two phase solution fully mass transfer.
Complete mixing and mass transfer process.
Extraction and extraction residual phase separation process;
mixture under the action of vortex disk into the rotary drum, in the plate to form the bulkhead area, mixture quickly with synchronous rotary drum, in under the action of centrifugal force, the heavier than major phase fluid in the process of upward mobility and gradually away from the drum center on the drum wall;
Small proportion of liquid phase gradually away from the drum wall and on to the center, after clarification of two phase fluid end respectively through their weir plate into the collection chamber and the tube was closed to derivation, respectively, to complete two phase separation process.
From the extraction phase and extraction phase extractant recycling process.
usually use the method of distillation recycling extracting agent.
Removal after extraction of proportion as the extractant extract;
After removal from the extraction agent over extraction of proportion of extraction liquid.