A method of conditioning and concentrating sludge by means of pressure filtration

Abstract

The invention relates to a method for conditioning and concentrating sludge by means of pressure filtration, which adopts an integrated tower reactor and mainly includes: (1) Conditioning of sludge, passing unconcentrated residual sludge from a sewage treatment plant through the bottom of the reactor Into the device, add an appropriate amount of ferrous solution and persulfate to the drug inlet of the device, and the conditioner is mixed with the sludge to achieve sludge conditioning; (2) For sludge concentration, the middle part of the device can be moved up and down The disc-shaped iron filter press uses the pressure generated by the downward movement of the iron filter press and the gravity of the sludge itself to separate the solid from the liquid. The sludge is trapped and deposited at the bottom of the device by the iron filter press, and the supernatant passes through the pressure The iron filter screen is discharged from the outlet weir on the upper part of the device to achieve the purpose of high-efficiency sludge concentration. The treatment method using this reactor combines the traditional two-part process of sludge conditioning and sludge pressure filtration, which has the advantages of high efficiency, low cost, low land occupation, and industrialization prospects.

Description

technical field [0001] The invention belongs to the field of sludge conditioning and sludge concentration, in particular to a method for conditioning and concentrating sludge by means of pressure filtration, which adopts a designed integrated tower reactor. Background technique [0002] Sewage treatment plants have been widely used in China, and the resulting sludge disposal has emerged as an urgent problem that needs to be dealt with. After sewage sedimentation treatment, a large amount of sludge will be generated, and about half of the pollutants in the sewage will be transferred to the sludge. If it is not properly treated, it will cause serious secondary pollution. The moisture content of the sludge after concentration and dehydration is generally above 80%, and the average value is close to 90%, that is to say, the moisture in the wet sludge is nearly 9 times that of the dry sludge. In order to facilitate comprehensive utilization and final disposal, it is necessary to...

AI Technical Summary

Problems solved by technology

[0007] The main purpose of the present invention is to provide an integrated tower reactor and sludge treatment method that utilizes pressure filtration to regulate and concentrate sludge, so as to overcome the problems of large floor area, long time and low efficiency of existing sludge treatment methods , the residence time is 2-4 hours, and the moisture content of the sludge can be reduced to below 65%.

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