A study on sludge minimization during the treatment of pickling effluent.
In pickling industries, a lot of sludge is generated during the treatment of pickling effluent and there is severe problem of its disposal. Disposal of this sludge as per the Hazardous Waste (Management & Handling) Rules, 1989 is not easy. Its transportation and construction of lined disposal sites pose very severe problems. In the normal practice, the sludge is being disposed of at the sides of roads and railway tracks to fill low lying areas. This may cause serious health hazards. Considering these problems, a study has been undertaken to minimize the sludge generation during the treatment of pickling effluent by neutralizing it with lime, sodium hydroxide and combination of both. An attempt has been made to do an economic evaluation of the above process.
Singhal
Anupam
A
Department of Metallurgical & Materials Engineering, Indian Institute of Technology Roorkee, Roorkee-247 667, India. aansindmt@iitr.ernet.in
Tewari
V K
VK
Prakash
Satya
S
D000534:Alum Compounds / Q000737:chemistry; D017610:Calcium Compounds / Q000737:chemistry*; D006256:Hazardous Waste / Q000517:prevention & control*; D007220:Industrial Waste / Q000517:prevention & control*; D008669:Metallurgy; D010087:Oxides / Q000737:chemistry*; D012972:Sodium Hydroxide / Q000737:chemistry*; D013232:Steel; D013447:Sulfites / Q000737:chemistry; D013464:Sulfuric Acids / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods
D000534:Alum Compounds; D017610:Calcium Compounds; D006256:Hazardous Waste; D007220:Industrial Waste; D010087:Oxides; D013447:Sulfites; D013464:Sulfuric Acids; D013232:Steel; C041524:aluminum sulfate; D012972:Sodium Hydroxide; C016538:lime; C033158:sulfuric acid; C009279:sodium bisulfite