Recovery of cleaning solutions
Cleaning solutions are used in a large variety in different industry sectors. They contain mostly alkalis or acids, enzymes or other active cleaning agents. Approx. 95% of the solution can be recovered saving in water, chemicals and water taxes.
Recovery of grinding water
· recycling of water by glass working
· recycling of water in the mechanical cleaning (bolt)
· recycling and purification of cutting oils and lubrication to the tool machines
· recycling of oils to emulsions
With cross-flow filtration the suspended particles of grinding water can be eliminated continuously. The permeate contains the chemical compounds and can be recycled. Thereby chemicals and water are saved, and the waste water flow is reduced greatly. This small volume can be filtered in a dead-end mode, so that the particles build-up a filter cake which can be easily disposed of.
Separation of particulate heavy metal compounds from waste water
· various metal salts can be recycled and reused (nickel, zinc, copper, cadmium, lead, chrome, etc.)
· no more coagulated ferric hydroxide
· copper and EDTA recycling
· copper recycling by laminae manufacturing
· no more suspended solids by manufacturing of lead-acid batteries
· no more cyanides in galvanic waters
Graphical, Photographic, Electronic industry
· ink and colours purification
· inks lost during high speed stamp can be recycled and reused
· silver recycling from fixing baths
· manufacturing of ultra pure water for the electronic industry
· recycling and reusing of metal salts
· treatment of waste waters from the manufacturing of television screens with ZnS
In the pharmaceutical industry 2 important uses can be found:
- concentration of diluted solutions
- products are divided from by-products and impurities
The most important applications we have:
· concentration, separation and purification of enzymes and yeasts, antibiotics, vaccines;
· concentration blood-plasma fragments, hormones, polysaccharides;
· clarifying of fermentation broths;
· clarifying and removal of bacteria from processing waters;
· no more cellular remains;
· sterile filtration of intravenous solutions.
· latex forced-concentration – in the manufacturing of adhesives, plasticise and other latexes produces big volumes of waste diluted latex. It is difficult to carry out a chemical treatment due to the capacity and composition variations. You can coagulate the latex with polyelectrolytes but this causes a problem with the mud disposal.
· Fractionation of low-molecular weight materials
· purification of inorganic acids
· purification of basic solutions by fertilizing industries, cleansing agents, sulphurated products
· purification of evaporator condenses to be used once more in boiler and/or process
· removal of particles from gassing carbon products
Textile industry / Paper industry
· useful applications in the textile industry involve the recycling of sizing agents and coloured pigmentation with high molecular weight
· applications in the paper industry involve the cleanliness of effluents from bleaching plants and recycling of sulphur compounds
· treatment of wool washing liquids
· assists the recycling of sulphides from calcination baths: proteins and other organic substances and colloids are kept from calcination baths due to the manufacturing of a permeate made essentially of clarified sulphides that can be reused;
· recycling of vegetable tannin followed by a waste reduction
· reduction of chrome
Concentration and washing of magnesium hydroxide
By manufacturing sea water magnesium. The cross-flow filtration let you save pure water to the washing operation’s advantage because the salt removal can be carried out at higher concentrations compared to sedimentation tanks.
Concentration of nickel hydroxide muds
Column outlet treatment obtained according to the regeneration of an ion exchanger containing nickel chloride and other heavy metals: the suspension can be concentrated at 10 times or more and so it can be used in terms of nickel recovery.
A nickel catalyst (Raney) is used in the nickel recovery process.
Filtrations of wax suspensions in acetone
The objective is to obtain the highest suspension concentration that is possible and at the same time reduce precious wax product losses.