Coolant-Cutting
oil recovery and reuse at BHEL, Tiruchirapalli
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| CEC
was retained by the Delhi Electroplating Industries
Association to appraise the two existing CETPs intended
for dealing with metal plating effluents and to reach
the specified discharge limits, which were not being
met consistently. These two CETPs at Wazirpur and Mayapuri
were accordingly appraised by CEC and the report thereon
was submitted for initiating remediations |
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This membrane based technology eliminates the older practice
of sludge from Lime based treatment and instead segregates
the basic coolant oil into concentrated membrane reject and
water, which are reused in cutting machines and topping up
batteries respectively. The key to the success is the Thin
Film Irradiation Unit "TFIU" incorporated ahead of membrane
to ensure against organic fouling. CEC identified the design,
configuration and commissioning of this zero liquid discharge
system. The highlights are
- This unit is commissioned in the month of March 2000 at
a cost of Rs. 4 lakhs
- Capacity of the Unit: 1000 liters per day, Net savings for
the period 2000-2003 is Rs. 4 Lakhs by
recovering and recycling of 6,49,402 litres of Coolant.
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