Information about Wastewater Treatment
Niro offers dryers for the wastewater industry, which utilise waste
heat for the complete drying of liquid wastes, primarily for wastewater
treatment. Complete wastewater treatment facilities often include decanters,
evaporators or sludge dryers.
Spray dryer design and operating
conditions meet the specific needs of each individual project. The drying
medium may be flue gas from a solid waste incineration process, hot air from
industrial processes, exhaust gases from gas motors or any other hot waste gas.
The drying medium may also be created by combustion of any available fuel such
as oil, natural gas or waste gas in the form of biogas for example.
Niro has supplied a number of spray dryers for the drying of wet
scrubber effluent from municipal solids waste incineration plants. These plants
normally utilise the hot flue gas exiting the economizer / air pre-heater. The
spray dryer is thus located upstream from the acid gas scrubber. Alkaline
reagent is often injected into the spray dryer with the wet scrubber effluent
to pre-scrub the flue gas.
Niro offers spray drying technology for a
wide range of pumpable liquid wastes. Aqueous solutions and wastewater, with a
significant content of suspended material, may be dried in a spray dryer to
produce a fine powder.
PRODUCT GROUP EXAMPLES:
- Wet Scrubber Effluent
- Disposal Site Leachate
- Salty Effluents
- Wastewater Concentrates