Method for deeply dehydrating sludge through gravity concentration and photodecomposition
A technology of gravity concentration and deep dehydration, which is applied in the fields of dewatering/drying/concentrating sludge treatment, water/sludge/sewage treatment, sludge treatment, etc. and energy loss, less mud volume, and the effect of improving the working environment
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[0022] The specific implementation of the present invention will be described in further detail below in conjunction with the examples. The following examples are used to illustrate the present invention, but not to limit the scope of the present invention.
[0023] The method for deeply dewatering sludge using gravity concentration and photolysis of the present invention includes the following steps:
[0024] A. Add the polymer composite flocculant to the sludge from the sewage treatment plant with a water content of 98% or more at the ratio of 1.3‰ to 1.7‰ of the sludge solid content Tds, and then use gravity to thicken the sludge. The water content is 95%-97%; the added amount of the polymer composite flocculant is small, and the treatment effect is better.
[0025] B. Aerate the gravity-concentrated sludge obtained in step A. The aeration residence time is 110-130 minutes, so that the dissolved oxygen DOC content of the mud is above 7.5mg / L, and the flocculant network is cut thr...
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