Method for biological purification of wastewater with no excess

Details Method for biological purification of wastewater with no excess Method for biological purification of wastewater with no excess

1987-12-23

1993-02-16

Wyse, Thomas

Liquid purification or separation

Processes

Treatment by living organism

210620, 210629, 210903, C02F 302

Patent

active

051868377

ABSTRACT:
The present invention relates to a method and an apparatus for biological purification of wastewater with no excess activated sludge by subjecting a machanically and/or chemically pretreated wastewater to the conditions of total endogenous respiration at aeration with one or more surface turbine type aerators of 5.10.sup.-2 to 12.10.sup.0.2 kW/m.sup.3 of wastewater, at a microorganism to food ratio of 20 to 100. The height of the liquid level in the basin is at least 5 m. There is provided a high-grade effluent at low capital and operational investment.

REFERENCES:
patent: 3980556 (1976-09-01), Besik
patent: 4537682 (1985-08-01), Wong-Chong
patent: 4643830 (1987-02-01), Reid

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