Pulping process wastes

Foamgard. [Rhone-Poulenc/Textile Rubber] Nonsilicone defoamer for carpet dyeing, dye baths, paper and pulp processing, waste treatment, print pastes. 

Pulping liquors. Pulping liquor, also called black liquor, is a corrosive material used to dissolve wood chips for the manufacturing of paper and other materials. To promote waste minimization and recycling, U.S. EPA excluded pulping liquors from the definition of solid waste if they are reclaimed in a recovery furnace and then reused in the pulping process. If the liquors are recycled in another way, or are accumulated speculatively, they are not excluded. 

The pulp and paper industry generates hazardous wastes, but most are associated with wastewater, which is rendered nonhazardous in wastewater treatment or neutralization units within the manufacturing facilities and therefore is not subject to RCRA requirements. Also, black liquor is exempt as a solid waste if it is reclaimed in a recovery furnace and reused in the pulping process. 

The organic chemical industry, the food processing industry, the pulp and paper industry, the textile industry, and the petroleum industry are important industries that produce organic process wastes. Unlike inorganic process wastes, they contain dissolved and insoluble matter in the main wastewater stream thus, they are more difficult to handle for disposal. They have its characteristic biological problems and spontaneous interaction with the surrounding environment, particularly, under high solar radiation. 

Chapters 1 through 6 outline our understanding of the enzymes necessary or potentially useful for biomass conversion. Included are chapters on fuels and chemical feedstock production, pulp and paper processing, waste processing and degradation, food processing, and specific classes of alkali or thermostable enzymes. 

Uses. In the production of polyacrylamides, which are used in water and waste treatment, paper and pulp processing, cosmetic additives, and textile processing in adhesives and grouts as cross-linking agents in vinyl polymers... 

Lignin is removed from wood by both the sulfate and soda paper pulp processes, and limited amts have been recovered from these sources and other wood waste. It has been used as a component of Dynamites, and has been nitrated... 

Murray, W. D. Richardson, M. (1993). Development of biological and process technologies for the reduction and degradation of pulp mill wastes that pose a threat to human health. Critical Reviews in Environmental Science Technology, 23, 157-94. 

MARATHON-HOWARD PROCESS. A treatment of waste sulfite liquor from sulfite pulp manufacture In recover chemicals and reduce steam pollution. The waste sulfite is treated with line and precipitates. (I) calcium sulfite for use in preparing fresh cooking acid for the sulfite pulp process, and 121 a basic calcium salt tif ligmn sulfonic acid (lignin sullYmalesi that can be pressed and used as a fuel of used as raw- material for vanillin, lignin plasties, and other chemicals. The remaining liquor with its BOD reduced X() ( is the effluent. 

Manufacturing and processing wastes include all residuals generated from material inputs that leave the plant as product output. Office and packaging wastes associated with this sector are included in the urban waste sector. The majority of these wastes are from pulp and paper manufacturing, primary and secondary wood manufacturing, and the construction industry. 

EPA OPTS TSCA regulates the use, disposal, and distribution in commerce of process waste water treatment sludges intended for land application from pulp and paper mills employing chlorine or chlorine derivative based bleaching processes (2,3,7,8-TCDD) Yes 40 CFR 744 EPA 1991f... 

The main uses of polyacrylamide are as a flocculant in the treatment of the water supply and in paper and pulp processing. Water is thus also a potential source of acrylamide found in human beings. Polyacrylamide has further uses in the removal of suspended solids from industrial waste water as well as in many other areas, such as cosmetics and soil conditioning. Smoking is known to involve exposure to acrylamide. 

Rychtera, M., Barta, J., Fiecter, A., and Einsele, A. A. (1977). Several aspects of the yeast cultivation on sulphite waste liquors and synthetic ethanol. Process Biochem. 12(2), 26-30. Rydholm, S. A. (1965). "Pulping Processes." Wiley (Interscience), New York. 

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