Process for producing a dried fertilizer from sewage sludge

Chemistry: fertilizers – Processes and products – Organic material-containing

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71 13, 71 62, 71 63, 71 6405, 71904, 210711, C05F 700, C05G 300

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active

051259516

ABSTRACT:
Sewage sludge is subjected to a treatment with an acid in order to form stable ammonium compounds before thermal drying of the sludge which would otherwise volatilize ammonia and diminish the nitrogen content of the sludge.

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