Procedure for obtaining and improving pumpability of high to very high biosolids containing dewatered sewage sludge
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United States of America Patent
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Oct 4, 2022
Grant Date -
May 7, 2020
app pub date -
Jun 15, 2018
filing date -
Jun 15, 2017
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Abstract
A procedure for producing a liquid fertilizing product from a biosolids cake that has been de-watered to a biosolids content of 18% or more. The procedure includes positioning a process amount of the biosolids cake in a reactor vessel, heating the biosolids cake process amount, and adding a quantity of an alkali and mixing it into the process amount of the biosolids cake to form a reactor mixture. The reactor mixture incubated for a period, and then cooled. The alkali includes pH-raising and hydrolysis-procuring components. The quantity of alkali in relating to the biosolids process amount is sufficient that a residual amount of the alkali remains in the cooled reactor mixture, the pH of the reactor mixture remains at a saturation level during and after the incubation period, and the cooled reaction mixture is pumpable.
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