Robert P. Selm
Engineering at Mt Barbara Dr, Mentor, KS
License number
Louisiana PE.0022088
Issued Date
Nov 19, 1985
Expiration Date
Sep 30, 2012
Category
Civil Engineer
Address
Address
135 Mount Barbara Dr, Mentor, KS 67401
Professional information
Apparatus And Process For Treatment Of Sludge
US Patent:
4350597, Sep 21, 1982
Filed:
Oct 31, 1980
Appl. No.:
6/202690
Inventors:
Robert P. Selm - Salina KS
Leland M. Shepard - Salina KS
Leland M. Shepard - Salina KS
Assignee:
Wilson & Company - Salina KS
International Classification:
C02F 152
US Classification:
210710
Abstract:
An apparatus and a process are provided which are particularly suited for treatment of sludge eminating from a metal finishing solution regeneration process, especially aluminum finishing solution. The sludge is washed on a horizontal belt vacuum filter from which a majority of the washing fluid is returned to the regeneration process. A portion of the washing water is wasted. After washing, the sludge is reslurried. Thereafter, the reslurried sludge is pumped to a reaction vessel in the presence of carbon dioxide under pressure. Sufficient carbon dioxide is provided to react with excess lime in the sludge to produce calcium carbonate and a substantially neutral pH. The sludge after carbonation is dewatered in a rotary drum vacuum filter and thereafter is suitable for placement in a landfill.