Obtaining different color tones via burn out printing on blended fabric

Different blended fabrics comprise polyamide/viscose, polyester/linen, wool/polyester and polyester/cotton were subjected to burn out using Aluminum sulphate, Sodium phosphate, Aluminum potassium sulphate, Di-hydrogen phosphate, Caustic soda or Formic acid. The loss weight was found to depend on both the nature of fabric and the chemical used as well as the concentration of the latter. Different color tones could be obtained on dyeing the burn out blends using a natural dye namely Rhubarb powder. The effect of burn out was evaluated via measuring the loss in weight, K/S as well as the overall fastness properties of the dyed fabrics

Performance evaluation of common effluent treatment plant for tanneries at Pallavaram CETP.

The Pallavaram Tanners Industrial Effluent Treatment Company Limited has been a forerunner in ensuring cleaner and safe environment. The project was implemented by a company formed by the tanners of the Pallavaram area. Tamil Nadu Pollution Control Board (TNPCB) was the counterpart of UNIDO and took the overall responsibility for implementation of the project. The present study has been undertaken to evaluate performance efficiency of the treatment plant. Water samples were collected at different stages of treatment units and analysed for the major water quality parameters, such as pH, biological oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSS) and total dissolved solids (TDS). The performance efficiency of each unit in treating the pollutants was calculated. The generated data presented evidence to that the common effluent treatment plant has been working with the norms of TNPCB and meeting the discharge standard limits.

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.