Process for preparing an agricultural fertilizer from sewage

Details Process for preparing an agricultural fertilizer from sewage Process for preparing an agricultural fertilizer from sewage

1987-08-20

1988-09-20

Castel, Benoit

Chemistry: fertilizers

Processes and products

Organic material-containing

210616, 210618, 210631, 210903, 210673, C05F 300, C02F 308

Patent

active

047723076

ABSTRACT:
Contaminated water is contacted with an agent which contains salts or cations of mono-, di-, or trivalent metals in a maximum amount of 50 masspercent and rock granules containing at least 25 masspercent zeolite, preferably clinoptilolite and/or mordenite. The amount of metal salts respectively cations present in the parent zeolitic rock can be increased according to necessity by ion-exchange, adsorption and/or impregnation, i.e. by combination of these processes following eventual dehydration. The agent obtained is homogenized. The exhausted bed can be regenerated biologically or with aqueous solution of a potassium salt.

REFERENCES:
patent: 3617540 (1971-11-01), Bishop et al.
patent: 4098690 (1978-07-01), Semmens
patent: 4522727 (1985-06-01), Weber

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