Method for producing liquid organic fertilizer by using organic fertilizer
A technology of organic sludge and organic fertilizer, applied in the direction of organic fertilizer, sewage/sludge fertilizer, sludge treatment, etc., can solve problems such as unfavorable extraction of organic fertilizer, limited degree of hydrolysis, reduction of degradation of macromolecular organic matter, etc. Low cost, reliable operation and high dewatering efficiency
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 The invention provides a method for producing liquid organic fertilizer by utilizing organic sludge. 1 shows a schematic flow diagram of a method for producing liquid organic fertilizer by utilizing organic sludge according to the present invention, and the following examples according to the schematic flow diagram are as follows.
 The excess thickened sludge produced by an urban sewage treatment plant has a moisture content of 98%, an organic matter content of 78% and a pH of 6.86.
 Add sodium hydroxide to the sludge to make the concentration reach 1.2kg / m 3 , stirred for 30 min, and then sonicated at 20 kHz for 10 min with a sound energy density of 0.1 W / cm 3 . The treated sludge enters the centrifuge and is separated under the condition of a separation factor of 1000 to obtain concentrated sludge and supernatant with a moisture content of 92%. The chemical oxygen demand (COD) of the supernatant is 11864 mg / L, humic acid The content is 2136mg / L. Th...
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