Chemistry: fertilizers – Processes and products – Organic material-containing
Patent
1997-11-10
2000-09-12
Langel, Wayne
Chemistry: fertilizers
Processes and products
Organic material-containing
210175, 210253, 210609, 210742, 210774, 210768, C05F 500, B01D 3518, B01D 2400, C02F 100
Patent
active
061172030
ABSTRACT:
A pathogen reduction system for a sludge treatment process that employees multiple reactors operating in a batch mode to reduce pathogen levels in the sludge while providing a continuous flow of pathogen reduced sludge to a digester. In addition, the present invention entails an efficient heat exchanger for heating and cooling the sludge being treated in the above process. In particular, the heat exchanger is of the counterflow type and includes a helical coil confined in an annular chamber for transmitting one media and wherein the helical coil is spaced so as to form another helical flow channel that is defined by the annular chamber and the helical coil itself. Consequentially, one media is directed through the helical coil while another media is directed through the flow channel that is defined in part by the helical coil.
REFERENCES:
patent: 3319586 (1967-05-01), Albertson et al.
patent: 3580193 (1971-05-01), Logan
patent: 3697417 (1972-10-01), Teletzke et al.
patent: 3913500 (1975-10-01), Paccione et al.
patent: 4246099 (1981-01-01), Gould et al.
patent: 4775467 (1988-10-01), Calltharp et al.
patent: 5021161 (1991-06-01), Calltharp
patent: 5232596 (1993-08-01), Castaldi
patent: 5451319 (1995-09-01), Kobayashi
Wastewater Engineering, Treatment, Disposal and Reuse, Metcalf & Eddy, Inc., p.852-853, 1991.
H.P. Zweifelhoper, "Experience with Aerobic, Thermophilic Disinfection of Sewage Sludge, at the Wartau Sewage Treatment Plant, and with Prepasteurizatin, at the St. Gallen-Hofen Works, also in Switzerland," pp. 3-37.
Andersen Edvin
Buchhave Karsten
Kruger, Inc.
Langel Wayne
Wong Melanie C.
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