发明名称 |
Chemically disinfected sewage sludge-containing materials |
摘要 |
A chemically disinfected sewage sludge-containing material comprising (1) an aqueous slurry of sewage sludge-containing material having a solids content in the range of about 10 to 30 wt. %; and (2) a chemical disinfectant comprising a water soluble silicate of sodium in the amount of 5 to 20 wt. % (basis dry wt. of said sewage sludge). In one embodiment, a pumpable chemically disinfected sewage sludge-containing material was produced by the steps of (1) dewatering sewage sludge to produce an aqueous slurry having a solids content of about 10 to 30 wt. %; (2) shearing the dewatered sewage sludge from (1) at a temperature in the range of about ambient to 230 DEG F. and at a shear rate of at least 30 per second for a period in the range of about 0.5 to 180 minutes; and (3) mixing the following materials together at a temperature in the range of about ambient to 230 DEG F. to produce a pumpable aqueous slurry having a solids content in the range of about 30 to 65 wt. % and a pH of at least about 11: (a) about 0.5 to 7 parts by wt. of sheared dewatered sewage sludge from (2); (b) about 5 to 20 wt. % of a silicate of sodium (basis total dry weight of sewage sludge); and (c) about 5 to 7 parts by wt. of at least one material from the group consisting of sewage sludge-containing material, liquid hydrocarbonaceous fuel, solid carbonaceous fuel-containing material, and mixtures thereof.
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申请公布号 |
US5423992(A) |
申请公布日期 |
1995.06.13 |
申请号 |
US19910702580 |
申请日期 |
1991.05.20 |
申请人 |
TEXACO INC. |
发明人 |
MCMAHON, MATTHEW A.;NAJJAR, MITRI S.;ROBISON, PETER D.;MCKEON, RONALD J. |
分类号 |
C02F11/00;(IPC1-7):C02F11/14;C02F1/50 |
主分类号 |
C02F11/00 |
代理机构 |
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