Industrial wastewater treatment plants

Only the perfect technology is able to fulfill permanently increasing requirements to protect environment and natural resources. We offer and deliver wide range of technologies for waste water treatment within the frame of the programme/platfrom "clear water in industry". Experiences from various fields of industrial application ensure the right choice of a technology, use of components and prove reliability for long operating lifetime. Our know-how uses the most up to date processes and best available technologies (BAT). On their basis, we are ready to submit optimal solution for particular project. We guarantee proposed technology, production of single parts, installation and equipment utility as well as our services after delivery. We are able to provide experiences of our own specialists in negotiation with local and environmental administration authorities.

We have suitable solutions for individual customer needs and requirements for waste-water treatment. We know proper legislation concerning environmental regulations. Our plants and equipment set high standard in environmenal care.
 

For waste water treatment of:

• acids and alkali contents
• oil, grease and other petroleum products
• cyanide contents
• chrome - VI contents
• nitrite waste-waters
• oxidative and reductive contents
• heavy and other metals (such as Ni, Cu, Cr, Pb, Sn, Ag, Zn, Fe, Al etc.)
• complex solutions
• poisonous anions (phosphate, fluorides etc.)
• ammonia ions contents
• over-spray treatment from paint shops
• dispersion contents i.e. teflon or graphite

We deliver:

• turnkey automatic batch and continuous plants for waste-water treatment and neutralisation
• emulsion breaking plants
• chemical dosing and preparation units
• sludge separators (batch or continuous)
• gravel and band filters, sorption filters
• ion-exchangers
• reactors, storage tanks, thickeners
• flotation units
• reactors and tanks

Cleaning - batch and continuous mode

The WWTPs we supply can be either batch, continuous or combined. The design of the WWTP depends on the volume and nature of the waste water.
 

Batch mode
The batch mode is suitable for smaller volumes of waste water, which may be more polluted.

The waste water is fed into the reactor of the WWTP where the waste water is treated to the required quality. After treatment, all the water is discharged out of the WWTP, then the whole cycle starts again. During the waste water treatment process, the WWTP collects the incoming waste water in storage tanks. 

Continuous mode
The continuous mode is suitable for larger volumes of waste water that have low or less problematic pollution. 

The treated water flows continuously through a cascade of flow reactors where it is continuously treated. The WWTP is capable of receiving and treating waste water continuously. 

Cascade of continuous reactors

Sedimentation unit and sand filtration unit

Chemicals storage

Cascade of continuous reactors

Traditional purification methods

Waste water treating plants using clasical chemical-physical methods for water purification

• Oxidation of cyanides, nitrites, ammonium ions and others
• Reduction of hexavalent chromium, nitrites and others
• Demulsification
• Coagulation
• Precipitation 
• Flocculation
• Sedimentation, separation and sludge dewatering

Filter press

Filter press with a sludge water storage tank

Cascade of reactors

Sedimentation unit

Final purification

Equipment for final separation of:

• Solid substances residues
• Organic substances residues
• Selective removal of harmful ions

Using:

• Sand and multilayer filters
• Adsorption on active carbon filters
• Sorption on ion exchangers
• Final pH adjustments

Active carbon filter

Ion exchange unit

Ion exchange unit

Membrane processes

Membrane processes are used for separation of substances with the use of semi-permeable membranes. The process is based upon ability of substances to go through pores of membranes to the other side.

The inlet solution is fed to one side of the membrane and due to the pressure differential induced on both sides of the membrane, the inlet solution is forced to pass to the other side of the membrane. Only substances with a smaller diameter than the diameter of the membrane pores pass through the membrane. Particles with larger diameters are retained on the membrane.

Membrane processes have two outputs. Permeate is a solution containing substances that pass through the membrane. Retentate is a solution containing substances that are retained on the membrane. The usability of permeate and retentate depends on the specific application of the processes.

Membrane processes include microfiltration, ultrafiltration, nanofiltration and reverse osmosis. Each type differs in the type of semi-permeable membrane, membrane pore size and pressure under which the process runs. Separation of smaller particles requires smaller diameter of membrane pores and higher pressure differential for particles to go through membrane.

The best results of membrane separation are achieved through a series of series-connected devices in the order of microfiltration, ultrafiltration, nanofiltration and reverse osmosis. Substances are separated from the largest particle diameter to the smallest. This achieves the longest possible life of the device, since large diameter particles are trapped in the first phases on coarse membranes and do not foul finer membranes in subsequent separation steps. The membranes are cleaned by demineralized water backwash.

Microfiltration unit

Ultrafiltration unit

Reverse osmosis unit - RO

Ultrafiltration unit

Reverse osmosis unit - RO

Reverse osmosis unit - RO

Vacuum evaporation

Vacuum evaporation is used to increase concentration of substances dissolved in water. Process is based on dependency of boiling temperature of water on air pressure. As opose to clasical distillation, the air pressure in boiling chamber si decreased. This means, that boiling temperature of water is also reduced. Lower boiling temperature requires less energy for heating. That’s why operating costs are very low. Vacuum evaporation has two outputs. The first one is a distillate, clean water, which can be either discharged or recycled back into the production process. The distillate has very low conductivity.
The second output is a concentrate, concentrated solution. The concentrate can be further used if it is a product or it contains valuable substances. If the concentrate is further unusable, it must be proffesionally disposed. Vacuum evaporation can achieve over 90 % volume reduction of waste water. Therefore vacuum evaporators are necessity in Zero Liquid Discharge systems for water recycling in production process. There aren’t required any additive chemicals in vacuum evaporation, which is another reason why vacuum evaporators are very eco-friendly. Automatic 24/7 operation makes evaporators easy to use and maintain.
 

You can find more about vacuum evaporation on dedicated website AQUADEST.CZ
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