Sludge valorisation resulting from anaerobic digestion
During anaerobic
digestion, organic nitrogen is mineralised in ammoniacal form (NH4+)
and organic phosphorus in the form of phosphates. Naskeo Environnement
proposes two innovating processes, making it possible to
recover for an agricultural valorization ammoniacal nitrogen and
phosphates contained in the effluents at the digester's end.
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Ammonia stripping
Stripping makes it possible
to recover the ammoniacal nitrogen of the effluents in a concentrated
sulfate solution of ammonia, easily transportable and usable like
manure.
The various stages of the process are the following ones:
- Stripping in basic medium of volatile ammonia in a column of gas exchange/liquid
- Absorption of ammonia degassed by a sulphuric acid solution.
- Stripping in basic medium of volatile ammonia in a column of gas exchange/liquid
- Absorption of ammonia degassed by a sulphuric acid solution.
A study in laboratory makes it
possible to determine the output of extraction on ammoniacal nitrogen
(NH4+) in a column
controls 1m.
Principle: Tests of the process in column of 1m height of garnishing and 10cm of diameter Results: Output of stripping according to the operating conditions
Principle: Tests of the process in column of 1m height of garnishing and 10cm of diameter Results: Output of stripping according to the operating conditions
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- +33(0)1.57.21.34.70
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