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Treatment of metalworking fluids in engineering industry

Objective

The metalworking fluids (cutting coolants) are steady state, kinetically stable emulsions used in intensive cutting, squirting, rolling, die forging, drilling processes et al.

The spent cutting emulsion is a consumable to be replaced.

Due to high stability of spent cutting coolant emulsions, their discharge to general purpose treatment facilities of the companies deteriorates wastewater treatment since highly emulsified petroleum products are not captured by settlement ponds and are passed through effluent filters.

In fact, the metalworking fluids are not decomposed naturally, therefore their discharge to ponds and treatment facilities preliminary mitigation is not permissible.

Indicator

Spent metalworking fluids

Similar metalworking fluids treatment methods

After implementation of solution

Petroleum products

1000-5000 mg/l

100-200 mg/l

0.05 - 10 mg/l

pH

4.0-9.0

6.5-8.5

6.5 – 8.5

Example of cutting tool lubricants decomposition scheme
The technological scheme for the lubricating coolant treatment provides its destabilization in the acidification reactor by lowering the pH value by an acid solution. Further, the destabilized emulsion is processed in the separation reactor by solutions of the coagulant Biomiсrogel® BMG-P2, coagulant and flocculant based on polyacrylamide. As a result of the chemical dosing and mixing, oil products are bound and poorly soluble particles are formed. After the settling, the formed sludge goes to a belt filter for filtering, and the treated waste water is discharged by gravity.

Biomicrogel® BMG-P2 catch any mineral and vegetable oils, animal fats, and oil and petroleum products in water effectively, based on sweep- coagulation process.

They catch any mineral and vegetable oils, animal fats, and oil and petroleum products in water effectively, based on sweep- coagulation process.

After separation of oil-water mixture both treated water and removed petroleum products can be returned to the process cycle and re-used. Biomicrogel® BMG-P2 flocculants are well compatible with almost all flocculants based on inorganic salts of polyvalent metals cleaning water from suspended particles.

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Biomicrogel® BMG-P2 flocculants must be diluted in water using static mixer or other appropriate mixing device suitable for making homogeneous solution.

The following FCCW Code is applicable: 7 23 301 02 39 4: “The Settlement (sewage sludge) of flotation treatment of oily wastewaters, containing less than 15% of petroleum products”.

After precipitation from water Biomicrogel® BMG-P2 flocculant shall be disposed of in accordance with effective legislation.

The following FCCW Code is applicable: 7 23 301 02 39 4: “The Settlement (sewage sludge) of flotation treatment of oily wastewaters, containing less than 15% of petroleum products”.

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We process all enquiries and are able to find a customized solution for every client.

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