Sewage sludge dewatering using flowing liquid metals
Abstract
A method and apparatus for reducing the moisture content of a moist sewage sludge having a moisture content of about 50% to 80% and formed of small cellular micro-organism bodies having internally confined water is provided. A hot liquid metal is circulated in a circulation loop and the moist sewage sludge is injected in the circulation loop under conditions of temperature and pressure such that the confined water vaporizes and ruptures the cellular bodies. The vapor produced, the dried sludge, and the liquid metal are then separated. Preferably, the moist sewage sludge is injected into the hot liquid metal adjacent the upstream side of a venturi which serves to thoroughly mix the hot liquid metal and the moist sewage sludge. The venturi and the drying zone after the venturi are preferably vertically oriented. The dried sewage sludge recovered is available as a fuel and is preferably used for heating the hot liquid metal.
- Inventors:
-
- Oswego, IL
- Issue Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- OSTI Identifier:
- 866041
- Patent Number(s):
- 4620493
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE C02F - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
F - MECHANICAL ENGINEERING F26 - DRYING F26B - DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- sewage; sludge; dewatering; flowing; liquid; metals; method; apparatus; reducing; moisture; content; moist; 50; 80; formed; cellular; micro-organism; bodies; internally; confined; water; provided; hot; metal; circulated; circulation; loop; injected; conditions; temperature; pressure; vaporizes; ruptures; vapor; produced; dried; separated; preferably; adjacent; upstream; venturi; serves; thoroughly; mix; drying; zone; vertically; oriented; recovered; available; fuel; heating; moisture content; liquid metals; vertically oriented; water vapor; liquid metal; hot liquid; sewage sludge; vapor produced; preferably vertically; circulation loop; flowing liquid; sludge dewatering; thoroughly mix; /110/34/
Citation Formats
Carlson, Larry W. Sewage sludge dewatering using flowing liquid metals. United States: N. p., 1986.
Web.
Carlson, Larry W. Sewage sludge dewatering using flowing liquid metals. United States.
Carlson, Larry W. Wed .
"Sewage sludge dewatering using flowing liquid metals". United States. https://www.osti.gov/servlets/purl/866041.
@article{osti_866041,
title = {Sewage sludge dewatering using flowing liquid metals},
author = {Carlson, Larry W},
abstractNote = {A method and apparatus for reducing the moisture content of a moist sewage sludge having a moisture content of about 50% to 80% and formed of small cellular micro-organism bodies having internally confined water is provided. A hot liquid metal is circulated in a circulation loop and the moist sewage sludge is injected in the circulation loop under conditions of temperature and pressure such that the confined water vaporizes and ruptures the cellular bodies. The vapor produced, the dried sludge, and the liquid metal are then separated. Preferably, the moist sewage sludge is injected into the hot liquid metal adjacent the upstream side of a venturi which serves to thoroughly mix the hot liquid metal and the moist sewage sludge. The venturi and the drying zone after the venturi are preferably vertically oriented. The dried sewage sludge recovered is available as a fuel and is preferably used for heating the hot liquid metal.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 01 00:00:00 EST 1986},
month = {Wed Jan 01 00:00:00 EST 1986}
}