Liquid waste processing of radio-logical and photographic displays
The processing and recycling of liquid waste (emergence, fixation and water rinsing) of radio-logical and photographic displays has become a contemporary necessity as the relevant environmental protection provisions are very strict.Any negligence in concentrating and neutralizing liquid wastes may result in the closure of the display unit.
The processing of photo-chemical liquids is done either by concentrating them in tanks where they are safely transported in our company for processing or by installing of de-silvering devices and liquid mixing devices, or by installing of electrolysis, de-silvering devices and liquid mixing devices.This procedure not only protects the environment but it also gives profits to our customers.
The tanks for the concentration of liquid wastes don’t have any special features. Usually,they are plastic tanks with capacity of about 1,000 liters which are directly connected to the exit of the display unit.When it’s ready,the liquid wastes are transferred to our company where they are processed with safety and the silver is delivered to our customers.
The de-silvering devices and liquid mixing devices have the advantage of having a much smaller volume and usually placed in the display area.The fixation output of the display is connected to an ion-exchange device which retains the silver content of the liquid wastes.Continuing, in the liquid mixing device we connect the display,the rinsing water and finally the output of the de-silvering device.Mixing these liquids gives us a neutral pH, which makes it possible for liquids to be disposed of in the drains with an environmentally friendly way.There are also no fumes at the place where they are.The only downside to these devices is that there is no way to know how much silver each device has retain.So the devices are returned to our facilities and after processing the content is delivered to our customer.
Electrolysis installation should always be followed by de-silvering devices and liquid mixing devices,as their liquid wastes contain a percentage of silver which, according to the law, is above the permissible limits and is still harmful to the environment.The electrolysis takes up more space and is more complex in operation and maintenance but it has the advantage that the silver that is collected can be calculated.For this reason, electrolysis is only recommended if the display has a large working load or the liquids used are rich in silver.