Q - For which kinds of effluents do you recommend your equipment ?

A - Mainly for all those wastewaters which are polluted from chemicals used in INDUSTRIAL operations – Our range however also includes  equipment for water-softening in general, for demineralizing and even  for the concentration of wine musts. In this later situation the
concentrate is a DELICIOUS MUST destined for the production of top quality wines.

Q - Which is the production area you mainly supply your equipment to?

A - In actual fact there is not one only area of production, but instead ANY industrial activity where wastewater is generated which is forbidden to send to the sewerage – We can say, however, that for the past 20 years of our activity most of our customers have been found among the Companies specialized in Metal Surface Treatments in general and in metal working.

Q - Which International markets represent your most successful export outlets ?

A - Well, in actual fact, all of those where the problem of water availability is already of critical importance , and –together with this– where there is great attention with regard to  environmental protection and preventing water pollution – I can mention the countries where the logo of C&G is already well known and appreciated: France, Belgium, Spain, Poland, Slovenja, Turkey, Greece, Indonesia, Malaysia and Brazil where we have a sister-Company from the Group.

Q - What does a Vacuum Evaporator do in fact ?

A – It’s very simple: it removes all the water we want from a liquid, so on leaving the evaporator we get, on one side, the discharge of the evaporated (and thus re-usable) water, and on the other side a "concentrate" – Our Evaporator can
remove the water at a running cost which is certainly among the lowest, if not the lowest, that this technology allows today.

Q - Which is the strongest point of your vacuum evaporation system ?

A - There are a few "strong points" which make it of great interest. I would say the main one is the POWER CONSUMPTION which is extremely low, when compared to similar technology available on the market. We do guarantee that, with the evaporators of medium-scale capacity, the consumption is 150 Watts per each litre of water evaporated, and…NOTHING ELSE.

Q - How long ago did you first introduce your vacuum evaporator?

A - The first one was in 1979.

Q - How many units do you estimate that you have delivered since ?

A - Well over 600 units.

Q - Why would an Industrial activity find any advantage in investing in one of your vacuum evaporators ?

A  - For the simple reason that where the cost for the disposal of wastewaters is very high and where local anti-pollution laws are strictly applied, facts and economical calculations can show that it is certainly possible to re-pay the investment in just over 1 YEAR ! Now any industrialist knows that it is not easy to find a situation where this is possible, not even with equipment intended to produce a finished product with high mark-up value.

Q - We have a wastewater effluent generated by our activity of chrome electro-plating and the concentration of chrome stays very high which obviously makes the liquid very corrosive, even with respect to the material you usually use in manufacturing  your evaporators, i.e. stainless steel AISI 316-L. What guarantee can you offer against the  high risk of corrosion ?

A  - This is one of the main problems which our engineers already had to face in the first stages of design and construction of this equipment. After long and expensive experiments we were able to find the product which offers the best ratio quality/price which is steel type SANICRO-SN-28 produced by SANDVIK. We can therefore confirm that when compared to AISI 316-L the resistance is at least 3 times more.

Q - We have read that your the principle of evaporation enables an enormous reduction in the volume of a polluting liquid which one has to send and pay for disposal by specialized companies. Can you give us a TYPICAL example of how much the volume can be reduced ?

A - Before giving this kind of information, we would much prefer to have a precise indication as to the contents of the liquid and possibly to have a chance to carry out an evaporation test using the lab-machine on site which is available for potential customers. However, I can still say that it is certainly possible to concentrate even up to 20 TIMES. The average, from experience on hundreds of wastewaters, is from 12 to 15 times.

Q - We are a medium to small scale company, and find it very interesting to use your principle of evaporation for the wastewaters generated by our activity of paper printing, but we can not contemplate having even a single person to look after the unit because the final costs to the company would no longer make the operation convenient. Can you tell us what the level of automation of your evaporator is?

A - The COMPLETE working cycle of an evaporator of the serial-V (vertical boiler) is controlled in FULLY AUTO-MODE by a simple and reliable PLC with relevant software. This makes it unnecessary to have the presence of an operative. It is obvious that, as with any kind of "machine" we advise to make visual inspections say every 2-3 hours. I do wish to mention, however, that even in the case of a problem there is no risk whatsoever because the safety controls with which the installation is equipped will stop the unit and activate relevant alarms calling the attention of an operative.

Q - We do not have an engineer on our company staff who would be capable of repairing a breakdown in a machine like the one you are proposing. If we decide to install one of your evaporators, who should we call on for assistance ?

A - On us, of course. Depending on the geographical distance between your company and our activity, it will either be our own staff or the Engineer from one of our local Distributors. In any cases I would like to mention that the evaporator does not have many mechanical parts apart from the pumps, and there is no need to have a Mechanical Engineer in the vicinity. On the other hand, in view of the fact that the actual ""heart"" of our system is a typical refrigeration system (very similar to that of a domestic refrigerator) we would advise – in an emergency – to call an Engineer who is skilled on servicing similar systems and we would be glad to communicate with him on how to solve the problem.

Q - Is it possible, with your Serial-V evaporator, to obtain concentrated DRY muds ?

A - No, sorry. Not with Serial-V. We can propose one unit from the Serial-ES instead where the boiler is arranged horizontally. With this type of equipment the heat-exchanger consists of a "shirt"
made of embossed stainless steel which  covers the lower half of the boiler. Due to this design the power consumption is higher – up to approx 250 Watts per each litre of water evaporated – but, on the other hand, it is possible to reach the "ULTIMATE" concentration and obtain a concentrate which is almost in a dry condition. This will further reduce the costs of disposal with respect to the liquid concentrate which is delivered from the Serial-V evaporators but  because the concentrate is like a "paste" and therefore NOT PUMPABLE, the discharge of this type of evaporator has to be done BY HAND after opening the port-hole at the end of the automatic working cycle. For the same reason we have identified the maximum capacity for Serial-ES to be 1000 litres of water evaporated over  24 hours. I would also like to mention that in every situation where the cost of the disposal of wastewater is really too high and the volume is well over the limit of 1000 litres in 24 hours of Serial-ES, the best solution we can propose is to install one Serial-V evaporator to reduce the volume down to 1000 litres and then convey the 1000 litres to one Serial-ES unit thus obtaining the highest possible level of concentration.

Q - We might be interested in installing one of your evaporators but we need to know something more about the possibility of RECUPERATING raw materials from spent baths of our lines for surface treatment and electrical deposition.

A - I do confirm such a possibility. This is in fact one of the 2 outstanding advantages offered by the
use of an evaporator. The units are installed in line – for example - to process rinsing waters from galvanic operations and these, after concentration, may be sent back to the lines (on a "loop" system). The distillate can be used again as water for the rinsing stage. In this case we can recuperate both the raw material and the water with no need to have any discharge, thereby obtaining the typical situation of "ZERO-DISCHARGE".