Processing of the liquid fraction
Concentration by atmospheric evaporation
Objective
Concentration of nutrients and organic matter from liquid streams through evaporation at atmospheric pressure and moderate temperature
Inlets
Water flow from other processes (see combination with other technologies)
Efficiency
high Up to 90% of the nutrients are recovered, although it depends on previous treatments such as the removal of organic matter or nitrogen or acidification
Weaknesses
Possible emissions of ammonium and volatile organic compounds (VOCs) if no prior treatment is applied (nitrification-denitrification, anaerobic digestion followed by acidification);
Generation of odors that must be controlled;
Possible presence of heavy metals in the dried product that could limit its application depending on the levels;
Need to treat the condensates depending on the previous treatment;
Possible solidification problems compared to vacuum evaporation;
Generation of odors that must be controlled;
Possible presence of heavy metals in the dried product that could limit its application depending on the levels;
Need to treat the condensates depending on the previous treatment;
Possible solidification problems compared to vacuum evaporation;
Products
Concentrate (organic matter, nitrogen)
Other outlets
Condensate (water vapor)
Consumption
Energy: Low
Water: Not applicable
Reagents: Low
Investment
Not available. Quantifiable income: They can come from the sale of the dried product as fertilizer.
Operation
Not available
Observations
The concentrated product must be subsequently dried and subjected to a pelletization process to facilitate its application
Combination with other technologies
1. Coagulation-flocculation or Separation by centrifugation -> microfiltration -> reverse osmosis -> atmospheric evaporation;
2. Coagulation-flocculation or Separation by centrifugation -> microfiltration -> atmospheric evaporation;
2. Coagulation-flocculation or Separation by centrifugation -> microfiltration -> atmospheric evaporation;
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TRL - 9
Status Consolidated
Complexity High
Information made by:
BETA Tech Center