259 



Table IV.5.6. — Pollution characteristics of industrial waste — Continued 



Type of industry 

 Paper and allied products. 



Printing, publishing, and allied 



industries. 

 Chemicals and allied products.. 



Petroleum refining and related in- 

 dustries. 



Rubber and miscellaneous plastic 

 products. 



Leather and leather products . 



Stone, clay, glass, and concrete prod- 

 ucts. 



Primary metal industries 



Fabricated metal products, except 

 ordnance, machinery, and trans- 

 portation equipment. 



Machinery except electrical. 



Origin of major wastes 



Pulping operations, including leaching of 

 logs and chips, chemical pulping treat- 

 ments, and bleaching operations. De- 

 barking processes. Condensate from re- 

 agent recovery evaporators. Disposed 

 fibers from papermaking. Glue, ink, and 

 coloring agent spills. Heavy contamina- 

 tion from production of naval stores. 



Mainly dry operation. Some waste from 

 glueing and preparation of plates. 



Bleeding of recycle streams to avoid buildup 

 of impurities, wet scrubbing of stacks and 

 condenser exhausts, side reactions in 

 many processes, acid, alkaline and 

 organic extraction agents, impurities in 

 raw materials, catalysts, unreacted mono- 

 mers and other feed reagents, stabilizers, 

 contaminated cooling water, dispersing 

 agents, spent culture media, cleanup, and 

 spills. 



Crude oil and process brines, cooling water 

 from heat exchangers. Leaky heat ex- 

 change equipment. Side reaction products 

 from cracking and synthesizing opera- 

 tions. Fractions that escape collection by 

 distillation columns. Stack washing, 

 storage tank drainoff and spills. 



Most processes dry. Cooling water used in 

 considerable quantity. Acid or alkali di- 

 gestion of reclaimed rubber and washing 

 of digested product. Acid, salt, and alcohol 

 coagulants for latex processes. Wash 

 water for latex processes. Lubricating and 

 hydraulic oil spills. Reagent spills and 

 cleanup operations. Latex and reclaim 

 processes greatest polluters. 



Wastes occur almost exclusively in tanning 

 and finishing operation. Salting of hides, 

 leachate and scraping from hides, green 

 fleshing, unhairng, bating, pickling, de- 

 greasing and tanning. 



Grading of sand, clay and other mined com- 

 ponents is ma^or waste-water contami- 

 nation source. 



Cleaning and pickling acids. Various clean- 

 ing solutions and detergents. Oils for 

 forming operations. Coke quenching and 

 stack washing water, cooling water, 

 molding and ore sands, machining opera- 

 tions. Leaching agents for ores, flotation 

 process, ore purifying. 



Lubricating and hydraulic oil spills from 

 processing equipment. Machining opera- 

 tions, flue gas washing, metal cleaning 

 operations, paint spraying operation, 

 electroplating anodizing. 



Water wash of stacks, blowdown of boiler, 

 cooling tower residues, ion exchange 

 wastes, drainage from cinder and ash 

 dumps, cutting oils, lubricating com- 

 pound spills and rinse, hydraulic oil 

 leaks, sand blast dusts, dispersions, metal 

 chips, metal surface cleaners, corrosion 

 prevention reagents, painting and plating 

 operations. 



