NL7316640A - Thickening activated sludge from effluent treatment plants - by dense media sedimentation in the presence of heavy particles - Google Patents

Thickening activated sludge from effluent treatment plants - by dense media sedimentation in the presence of heavy particles

Info

Publication number
NL7316640A
NL7316640A NL7316640A NL7316640A NL7316640A NL 7316640 A NL7316640 A NL 7316640A NL 7316640 A NL7316640 A NL 7316640A NL 7316640 A NL7316640 A NL 7316640A NL 7316640 A NL7316640 A NL 7316640A
Authority
NL
Netherlands
Prior art keywords
heavy particles
sludge
thickening
activated sludge
treatment plants
Prior art date
Application number
NL7316640A
Other languages
Dutch (nl)
Original Assignee
Stamicarbon
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stamicarbon filed Critical Stamicarbon
Priority to NL7316640A priority Critical patent/NL7316640A/en
Publication of NL7316640A publication Critical patent/NL7316640A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
    • C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/01—Separation of suspended solid particles from liquids by sedimentation using flocculating agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/02—Settling tanks with single outlets for the separated liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2427—The feed or discharge opening located at a distant position from the side walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2488—Feed or discharge mechanisms for settling tanks bringing about a partial recirculation of the liquid, e.g. for introducing chemical aids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/26—Separation of sediment aided by centrifugal force or centripetal force

Abstract

The concn. of sludge, discharged from a biological effluent purifin. plant is increased by allowing the flocs of such sludge to settle in a reservoir in the presence of heavy particles introduced into the liq., then supplying the settled material to >=1 hydro-cyclone in which the sludge flocs are sepd. from the heavy particles which are recycled to the reservoir. System provides a simple technique for thickening sludges which settle only with difficulty and/or very slowly, enabling a concentrate to be obtd. suitable for e.g. centrifuging. The heavy particles pref. have a high specific gravity relative to the sludge flocs and a particle size of 10-100 mu, and may consist of magnetite, ferrosilicon, suitable types of sand or loess. The concn. of heavy particles used to entrain the sludge is pref. 25 g/1.
NL7316640A 1973-12-05 1973-12-05 Thickening activated sludge from effluent treatment plants - by dense media sedimentation in the presence of heavy particles NL7316640A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7316640A NL7316640A (en) 1973-12-05 1973-12-05 Thickening activated sludge from effluent treatment plants - by dense media sedimentation in the presence of heavy particles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7316640A NL7316640A (en) 1973-12-05 1973-12-05 Thickening activated sludge from effluent treatment plants - by dense media sedimentation in the presence of heavy particles

Publications (1)

Publication Number Publication Date
NL7316640A true NL7316640A (en) 1975-06-09

Family

ID=19820134

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7316640A NL7316640A (en) 1973-12-05 1973-12-05 Thickening activated sludge from effluent treatment plants - by dense media sedimentation in the presence of heavy particles

Country Status (1)

Country Link
NL (1) NL7316640A (en)

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