Method for simultaneously and deeply conditioning and dewatering sludge and recycling and conditioning activating agent
An activator and treatment method technology, applied in sludge treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve high economic cost, large dosage of activator, limited sludge dehydration performance, etc. problems, to achieve the effect of avoiding large dosage, realizing the cost of activator, and improving the sludge dewatering performance
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Embodiment 1
[0029] A method for deep conditioning and dehydration of sludge while recovering a conditioning activator, comprising the following steps:
[0030] (1) The remaining sludge was taken from a sewage plant in Changsha City. After standing for 13 hours, the moisture content of the sludge was 95.9%, and the pH of the sludge was 6.80.
[0031] (2) Adjust the pH of the sludge in step (1) from 6.9 to 6.6.
[0032] (3) Add iron powder accounting for 25% of the dry weight of the sludge to the sludge in step (2) at a stirring rate of 180 r / min, and stir for 3 minutes to obtain a mixture.
[0033] (4) At a stirring rate of 180r / min, continue to add potassium monopersulfate compound salt accounting for 4.8% of the dry weight of the sludge to the sludge in step (3), and stir for 3 minutes to obtain a mixture.
[0034] (5) At a stirring rate of 180 r / min, place the mixed sludge in step (4) in a constant temperature water bath, heat to 53° C. and maintain it for 15 minutes for heat treatment...
Embodiment 2
[0039] A method for deep conditioning and dehydration of sludge while recovering a conditioning activator, comprising the following steps:
[0040] (1) The remaining sludge was taken from a sewage plant in Changsha City. After standing for 13 hours, the moisture content of the sludge was 95.9%, and the pH of the sludge was 6.80.
[0041] (2) Adjust the pH of the sludge in step (1) from 6.9 to 6.5.
[0042] (3) At a stirring rate of 180 r / min, add iron powder accounting for 27% of the dry weight of the sludge to the sludge in step (2), and stir for 3 minutes to obtain a mixture.
[0043] (4) At a stirring rate of 180r / min, continue to add potassium monopersulfate compound salt accounting for 4.7% of the dry weight of the sludge to the sludge in step (3), and stir for 3 minutes to obtain a mixture.
[0044] (5) At a stirring rate of 180 r / min, the mixed sludge in step (4) was placed in a constant temperature water bath, heated to 55° C. and maintained for 15 minutes for heat tr...
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