Wheat straw bio-engineering pulping technology
2019-05-20 14:04:13
In China's paper industry, non-aqueous pulp accounts for more than 80% of total pulp production. The production methods are based on alkaline pulping and bleaching with chlorine. In practical applications, the alkaline recovery of straw pulp accounts for only 1% to 1.5% of the total alkali recovery in the industry. About 99% of the residual alkali is discharged with black liquor. The surrounding rivers and soils caused serious pollution, and a large number of pulp-making enterprises stopped production due to closure. The use of biotechnology to improve the pulp and papermaking process is an important development direction for small and medium-sized pulp and paper companies to reduce pollution and resume production.
Wheat straw bio-technology pulping technology using water quality cellulose degradation of microorganisms, pretreatment of grass materials, the processing cycle is only 5-6 days, the yield is 65% -75%, chlorine bleaching, whiteness after bleaching up to 60 % - 70% ISO, breaking up to 4000-5000m, in line with the national standards for production of newsprint, writing paper and wrapping paper, waste liquid pollution load is only 1/3 - 1/5 of chemical pulp, pH value is 8, only By precipitation and biochemical treatment, discharge standards can be achieved.
The technology can be directly applied to wheat straw chemical pulp production enterprises, and it is also suitable for the wheat straw chemical pulp production enterprise to carry out the transformation on the original equipment, in order to make full use of the original equipment, and quickly resume production.
Wheat straw bio-technology pulping technology using water quality cellulose degradation of microorganisms, pretreatment of grass materials, the processing cycle is only 5-6 days, the yield is 65% -75%, chlorine bleaching, whiteness after bleaching up to 60 % - 70% ISO, breaking up to 4000-5000m, in line with the national standards for production of newsprint, writing paper and wrapping paper, waste liquid pollution load is only 1/3 - 1/5 of chemical pulp, pH value is 8, only By precipitation and biochemical treatment, discharge standards can be achieved.
The technology can be directly applied to wheat straw chemical pulp production enterprises, and it is also suitable for the wheat straw chemical pulp production enterprise to carry out the transformation on the original equipment, in order to make full use of the original equipment, and quickly resume production.
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