Liquid purification or separation – Processes – Treatment by living organism
Patent
1983-05-05
1987-12-01
Castel, Benoit
Liquid purification or separation
Processes
Treatment by living organism
210631, 210180, 210182, 71 10, 71 12, 203 23, 203 36, C02F 328, C02F 104
Patent
active
047103000
ABSTRACT:
The invention pertains to a method for processing of organic materials containing nitrogen compounds, where the organic material undergoes an anaerobic digestion with simultaneous liberation of biogas which contains methane and carbon dioxide. The liquid product obtained after anaerobic digestion is, according to the invention, heated to boiling temperature, ammonia bonded as carbonate which is distilled off, and the tail product from distillation is further processed to the valuable product and clear water or is discharged as prepurified waste water. During the processing to the valuable product in the form of organo-phophate-lime concentrate, the tail product of distillation is alkalized by lime and carbonized with carbon dioxide. Biogas or carbon dioxide obtained by distillation may be used in carbonation. The processed organic materials may be excrements from farming of hogs and black cattle, waste from chemical and alimentary industry, city sewage sludges, and various kinds of biomass which may be employed in the process of anaerobic digestion for production of biogas.
REFERENCES:
patent: 3278423 (1966-10-01), Millar
patent: 4104131 (1978-08-01), Didycz et al.
patent: 4134830 (1979-01-01), Skogman et al.
patent: 4137158 (1979-01-01), Ishida et al.
patent: 4140586 (1979-02-01), Kwasnoski et al.
patent: 4162153 (1979-07-01), Spector
Castel Benoit
Ceskoslovenska akademie ved
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