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Industrial and storm wastewater purification from oil and petroleum

Objective

Industrial wastewaters polluted with lubricants, grease and oil products are generated as a result of production plant activities in the following industries: metal fabrication, machinery, oil production, oil refinery, food manufacturing industry etc.

Storm wastewater, incl. surface and melt waters, water flushed from roads within factory premises, also contain petroleum products.

The challenges of industrial and storm wastewater purification:

Low efficiency of existing treatment technologies (e.g., residual concentration of petroleum products after treatment up to 30 mg/l vs. advisable 0.05-1 mg/l).

High CAPEX and OPEX incurred in terms of existing treatment technologies.

Indicator

Initial values

After implementation of solutions

Petroleum products

50-500 mg/l

0.05-1 mg/l

рН

7.0-9.0

7.5-8.5

Wastewater treatment option with flotation plant

Oily waste water is fed into a pipe flocculator for chemical treatment by solutions of coagulant, flocculant Biomicrogel® BMG-C2 or coagulant Biomicrogel® BMG-P2 and flocculant based on polyacrylamide. The water treated by chemicals passes through a pipe flocculator for better mixing and distribution of chemicals in the waste water volume. As a result of the chemical dosing, oil products are bound and poorly soluble particles are formed. Further, the wastewater is sent to the flotation unit, where the pollutants as a flotation foam are removed due to the physicochemical treatment. The treated waste water is discharged by gravity from the flotation unit, and the separated flotation foam is fed to the screw-press for dewatering.

Example of a wastewater treatment scheme with a reactor

The technological scheme for the oily waste water treatment provides its accumulation and sequential processing 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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Need help? Send us a message and we’ll get back to you.
We process all enquiries and are able to find a customized solution for every client.

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