Biological treatment of waste water

Details Biological treatment of waste water Biological treatment of waste water

1982-02-25

1984-04-17

Wyse, Thomas G.

Liquid purification or separation

Processes

Treatment by living organism

210609, 210615, 210625, C02F 305

Patent

active

044433379

ABSTRACT:
A method for biologically purifiying waste water which produces substantially no excess waste sludge is provided. In this method, a waste water containing biodegradable substances is treated in a biological fixed film type reactor and aqueous water sludge discharged from the reactor is aerobically digested after being separated from the biologically treated waste water. The digested aqueous sludge is returned to the reactor or the upstream thereof. This method can be advantageously combined with any installed activated sludge type water purification process, to thereby substantially eliminate the production of excess waste sludge from the water purification system.

REFERENCES:
patent: 2142196 (1939-01-01), Langdon
patent: 2457057 (1948-12-01), Mallory
patent: 2562510 (1951-07-01), Schlenz
patent: 3402125 (1968-09-01), Tonaka
patent: 3444076 (1969-05-01), Sekikawa et al.
patent: 3549521 (1970-12-01), Stevens
patent: 3557954 (1971-01-01), Welch
patent: 3623976 (1971-11-01), Cessna
patent: 3764525 (1973-10-01), Goodman
patent: 4085041 (1978-04-01), Fullerton et al.

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