Power Plastics

Membrane Filtration Systems - Reverse Osmosis - Electrodeionization

Membrane Filtration Systems

Membrane systems serve for treatment of sea water, brackish water, drinking and distilled water.

Applications: in the petrochemical industry [waste water disposal, back use of technological water], pharmaceutical industry [infusion solutions, production of medicines] and food processing industry [water for production of drinks, processing of fruit and vegetable juices, milk processing] and also during water treatment in water management plants, power stations and thermal plants [demineralised cooling water, additional water for feeding of boilers].

All the membrane systems include high-pressure membranes, high-pressure pumps, an embedded regulator and necessary pre-treatment.

Membrane filtration is a physical process at which a semi-permeable membrane is used for separation and removal of soluble substances, organic colloid substances, viruses and bacteria from water.

At present there are used four types of membrane filtrations according to the size of the impurities to be removed:

Microfiltration
Ultrafiltration
Nanofiltration
Hyperfiltration [reverse osmosis]

Water Treatment & Filtration Technologies
Micron Size	0.0001	0.001	0.01	0.1	1.0	10	100	1000
Examples Filtration Technology	Metal Ions	Aqueous Salts	Colloids Viruses	Bacteria		Pollens Beach Sand
						Particle Filtration
				Microfiltration
			Ultrafiltration
		Nanofiltration
	Hyperfiltration

Microfiltration

Filtration to a size of 1 µm for removal of dispersed particles. The main application is a pre-treatment process for hyperfiltration [RO systems] and drinking water filtration.

Ultrafiltration

Ultrafiltration equipment is used for removal of turbidity, non-dissolved substances and microbiological contamination during drinking water processing and in production of foods and drinks.

Nanofiltration removes some 80-85% of soluble mineral salts and 99% of all bacteria from water

The nanofiltration principle is the same as in the case of reverse osmosis. The nanofiltration systems are often used as an alternative to a classical water softening process, also for the reason that operation costs of nanofiltration are lower because the necessity of regeneration of water softener with a large quantity of salt is fully eliminated. It is used to remove bivalent ions [Fe⁺⁺, Ca, Mg] from water. The main use is given by water treatment at water heating systems, cleaning of boilers, production of foods and drinks, water processing and applications in high-performance cooling towers.

Reverse osmosis systems remove 95-99% of soluble mineral salts and 99% of all bacteria from water

The reverse osmosis principle is an opposite process to natural osmosis taking place in nature. Raw water which is to be desalted is brought under a high pressure to the tank divided by a semi-permeable membrane. Only clear water can pass through the membrane, but not any ions of the substances dissolved. They remain settled on the membrane. A part of the water brought thus becomes clear desalted water [permeated part] and the remaining part of water is on the other hand characterised by a growth of salt concentrate [concentrated part].

RO units for drinking water desalting
RO units for brackish water desalting
RO units for sea water desalting

The RO system consists of pressure pumps and RO membranes. Water from sources is treated before passing through the membranes. The raw water pre-treatment is very important for prevention from settling and precipitation; it protects RO membranes and ensures a long lifetime of the system.

Our pre-treatment circuit includes: flocculation and multilayer filtration, softening, pH treatment, removal of scaling by using active charcoal filters, ultrafiltration and microfiltration.

Small Reverse Osmosis Units

Model	Permeate Capacity [l/h]	Membrane Number & Size [inch]	Power [kW]	Unit Size [cm]	Height [cm]
B-024	1 000	4 x 4040	2	70 x 240	160
B-035	1 500	6 x 4040	2	70 x 240	160
B-050	2 000	8 x 4040	3	70 x 240	160

Brackish Water Reverse Osmosis

Model	Permeate Capacity [l/h]	Membrane Number & Size [inch]	Power [kW]	Unit Size [cm]	Height [cm]
C-030	1 300	6 x 4040 BW	3	80 x 340	160
C-050	2 000	9 x 4040 BW	3	80 x 340	160
C-070	2 700	12 x 4040 BW	4	80 x 440	160
C-090	3 600	16 x 4040 BW	4	80 x 440	160
D-100	4 000	4 x 8040 BW	5.5	100 x 250	160
D-150	6 000	6 x 8040 BW	7.5	100 x 350	160
D-220	9 000	9 x 8040 BW	11	100 x 350	160
D-300	12 000	12 x 8040 BW	15	100 x 350	160
D-360	15 000	15 x 8040 BW	18.5	100 x 550	160
D-500	20 000	20 x 8040 BW	22	100 x 550	220
D-600	25 000	25 x 8040 BW	30	100 x 550	220
D-700	30 000	30 x 8040 BW	37	100 x 550	220

Sea Water Reverse Osmosis

Model	Permeate Capacity [l/h]	Membrane Number & Size [inch]	Power [kW]	Unit Size [cm]	Height [cm]
SK-25	1 000	2 x 8040 SW	11	150 x 250	160
SK-50	2 000	4 x 8040 SW	15	150 x 450	160
SK-75	3 000	6 x 8040 SW	22	150 x 450	160
SK-100	4 000	8 x 8040 SW	30	150 x 450	160
SK-150	6 000	12 x 8040 SW	37	150 x 450	160
SM-200	9 000	18 x 8040 SW	55	220 x 700	200
SM-300	12 000	24 x 8040 SW	75	220 x 700	200
SM-400	17 500	36 x 8040 SW	110	220 x 700	200
SM-500	21 000	42 x 8040 SW	150	220 x 700	200

RO compact unit on a frame

Flow rate: 4m³/hr

Brackish water

Water from a well with a high content of salts

RO unit on a frame

Flow rate: 345m³/hr

Industrial waste water

Including pre-filtration and chemical dispensing

RO unit in a 40-feet container

Flow rate: 16m³/hr

Water from a well with a high content of salts

Including pre-filtration, chemical dispensing and a storage tank

Electrical deionisation [EDI] is a new modern technology of ultra-clear water preparation which combines the technology of filtration through semi-permeable membranes [RO] and the ion-changer technology, and thus it achieves a high efficiency in the demineralisation process. In the area between the membranes, EDI uses a mixture of cation and anion exchange resins which markedly accelerate the movement of ions and facilitate removal of salts also from highly diluted solutions.

electrodeionization-membrane-filtration-systems-img02.jpg

The EDI process makes use of an electrical field for a continuous regeneration of the ion exchanger system, as well as the field capability of reducing ions on the basis of their charge. Thus it is possible to save a large quantity of acids and other caustic materials necessary for resin regeneration.

The use of the EDI technologies saves consumption of energy [normally 0.1 to 0.5 kWh/m³] as well as operation costs for production of ultra-clear water, it saves as much as 95% of chemical substance consumption, and therefore it means a lot of environmental benefits as well.

If you require obtaining of ultra-clear water or any other treatment of water requesting a membrane technology, please contact us and we will draw up, free of charge, a proposal for the most suitable solution for you, on the basis of a raw water analysis, required filtration capacity [m³/hr] and required quality of output water. In our offer you will at the same time obtain a complete solution of water pre-filtration, membrane filtration as well as of a final water treatment system.

reverse-osmosis-electrodeionization-filtration-and-water-treatment.jpg