Applications & performances
Filtration of the industrial waste waters
Chemical industry
Chemical industry often generate waste waters issuing from the washing reactors and pipes.
The following fields are concerned:
• Production of paints, primers blends, polymers for surface treatment
• Production of washing agents, detergents, soaps
INDUSTRIAL WASTE: WASH WATER ISSUED AT THE CHEMICAL PLANT (Fig.1)
Waste water Concentrate Permeate
Fig. 1.
Mean flow rate of permeate is 62 L/h m2 @ TMP 10 bar
| Parameter | Waste Water | Concentrate | Permeate |
| TOC (mg/l) | 12 400 | 48 000 | 45 |
| Dry Solids (mg/l) | 18 000 | 69 500 | 25 |
| Volume (m3/year) | 2 500 | 605 | 1 895 |
Table for Fig.1. Filtration the reactor wash waste water with RVF using nanofiltraton membranes. Volume Reduction: 2500/620 = 3.8
INDUSTRIAL WASTE: Waste water treatment plant
Industrial waste water treatment plant in chemical industry
Waste water Concentrate Permeate
Fig. 2.
Mean flow rate of permeate is 48 L/h m2 @ TMP 8 bar
Parameter | Waste Water | Concentrate | Permeate |
COD (mgO2/l) | 1 500 | 7 100 | 90 |
Dry Solids (mg/l) | 5 000 | 11 200 | 3 500 |
Volume (%) | 100 | 20 | 80 |
Table for Fig.2. Filtration the industrial waste water with VF using nanofiltraton membrane. Volume Reduction is 5.
Calculation of the payback period of RVF-E unit used for the treatment of the industrial waste waters
Parameters | Units | Baseline | Calculated values |
| Performances data of the RVF-E unit: | |||
| Permeate production (will be used for recycling / reuse or reclamation onto municipal WWTP) | m3/h | 1 |
|
| Membrane flux | l/hm2 | 40 |
|
| Necessary membrane surface area | m2 | 25 | |
| Permeate volume obtained during a year | m3/year | 8160 | |
| Electricity consumption and cost: | |||
| Specific power consumed per m2 of membrane | kW/m2 | 3.8 |
|
| Total power consumed of the unit | kW | 95 | |
| Cost of the energy | €/kWh | 0.07 | |
| Cost of the energy for the RVF filter motors | € | 6.7 | |
| Specific cost of the energy (per m3 of the obtained permeate) | €/m3 | 7.2 | |
| Capex & amortization: | |||
| Specific price of 1 m2 RVF-E unit | €/m2 | 16 000 |
|
| Total price of the unit | € | 400 000 | |
| Amortization period | Year | 7 | |
| Opex | €/year | 15 000 | |
| Total specific cost for client (electricity + capex + opex) | €/m3 | 16 | |
Client’s specific savings onto incineration of the permeate-equal volume of the waste waters due to membrane filtration instead of incineration | €/m3 | 80 | |
| Client’s payback period | Year | 0.6 | |