Wastewater management system

Details Wastewater management system Wastewater management system

1996-11-05

1998-12-01

Cintins, Ivars

Liquid purification or separation

Recirculation

Serially connected distinct treating or storage units

210201, 210203, 210284, C02F 900

Patent

active

058433082

ABSTRACT:
The present invention is a dual-stage, gravity continuously-backwashed filtering system for filtering contaminants from wastewater. This filtering system has a first sand-filter unit that is loaded with wastewater influent. The filtering sytem has injection points for coagulation chemicals and disinfection chemicals. The first sand-filter unit is connected in series to a second sand-filter unit of similar design. The first sand-filter unit is made up of large-grained sand, the second sand-filter unit fine-grained sand. The second sand-filter unit receives its influent from the effluent weir of the first sand-filter unit. The reject water from the second filter unit is re-introduced into the influent that is fed to the first filter unit. The reject matter from the first filter unit is passed to waste.

REFERENCES:
patent: 4048068 (1977-09-01), Hirs
patent: 4246102 (1981-01-01), Hjelmner et al.
patent: 5277829 (1994-01-01), Ward
patent: 5454959 (1995-10-01), Stevens
patent: 5462654 (1995-10-01), Hering

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