|
|
|
Home:
Case Studies: Process Change aids Economic and Environmental Sustainability: Electroplating
| Process Change aids Economic and Environmental Sustainability: Electroplating
|
|
|
| Status: |
|
| Type of technology: |
|
| Submitted: |
|
|
|
INTRODUCTION
|
|
Contamination generated by the process is due to degreasing and zinc rinsing and passivation operations. The drag-out from the baths was considerable, leading to excessive contamination and exaggerated consumption of chemicals, both in the process itself and in the purification stage. Moreover, the rinsing process was generally inappropriate due to its excessive water consumption. Operating costs were thus too high and inefficiency was causing difficulty in meeting compliance for heavy metal concentrations, salts and conductivity in wastewater.
|
|
|
FINANCIAL DETAILS
|
|
Investment Amount:
|
US $6,667 |
|
Estimated Time to Recover Investment:
|
N/A |
|
Estimated Life Cycle of the Investment:
|
10 years |
|
Finance Sources:
|
N/A |
|
|
TECHNOLOGY
|
Technology Used:
Process change was at the core of the activities initiated. Drainage time was increased to reduce drag-out by 65%. Changes in some processes led to a 20-50% increase in the average operating life of pickling, degreasing and passivating baths. The parts-cleaning and rinsing process was modified to reduce water consumption by 25%. Effluents were segregated according to their characteristics. Various improvements in the purifications systems resulted in a 70% reduction in the consumption of purifying chemicals and a significant reduction in sludge generation.
|
Technology Provider:
|
|
| TECHNOLOGY FEASIBILITY ANALYSIS: |
Technical feasability analysis:
|
| Technical assessment: |
|
Economic feasability analysis:
|
| Economic assessment: |
|
Environmental feasability analysis:
|
Environmental assessment:
|
|
|
|
ENVIRONMENTAL BENEFITS
|
|
Benefits: Reduced Water Pollutants, Reduced Land Pollutants, Reduced Solid Waste Production
|
Details:
Annual Savings:
water consumption: 10,000 m3/year (13,080 cubic yards/year), or 29% reduction;
bath salt consumption: 10 t/year (11.02 U.S. or short tons/year), or 43% reduction;
treatment plant chemical consumption: 30 t/year (33.07 U.S. or short tons/year), or 60% reduction.
Also, from a legislative point of view, the fulfilment of concentration tables is easier, since the control of variables is largely carried out in the process itself, recirculating flows as much as possible, and not leaving it to the end of pipe treatment.
|
|
|
| |
|
> About SANet
