Method and device for changing ozone addition sequence in microbubble ozone-coagulation-air floatation process

Abstract

The invention discloses a method for changing an ozone addition sequence in a microbubble ozone-coagulation-air floatation process. The method comprises the following steps of changing the ozone addition sequence in a system pipeline switching way according to water quality characteristics of raw water, namely switching ozone addition before coagulation and ozone addition after coagulation; when the raw water contains abundant non-humus substances, performing ozone addition before coagulation, and when the raw water contains abundant humus substances, performing ozone addition after coagulation. The invention also provides a device for changing the ozone addition sequence in the microbubble ozone-coagulation-air floatation process. The ozone addition sequence is changed by switching two paths of branch pipes on a return pipe, namely ozone addition before coagulation and ozone addition after coagulation are switched. According to the method and the device, sewage is efficiently and deeply treated by virtue of microbubble ozone oxidation, coagulation and air floatation separation, and the ozone addition sequence can be changed according to different water quality characteristics of the raw water, so that the sewage is pertinently deeply treated, and the removal of organisms and suspended matters is ensured.

Description

technical field [0001] The invention belongs to the technical field of advanced sewage treatment, and relates to advanced sewage treatment technology, in particular to a method and device capable of changing the ozone dosing sequence in the microbubble ozone-coagulation-air flotation process. Background technique [0002] Sewage recycling is one of the main ways to alleviate urban water shortage. Currently, the commonly used wastewater recycling technology uses "coagulation + sedimentation + filtration" as the conventional process of the treatment process. Its main purpose is to remove secondary treatment in sewage treatment plants. The remaining suspended solids and organic matter in water, but the removal effect on the latter is not obvious, so ozone will be introduced in the advanced treatment process to improve the removal rate of organic matter in the treatment process. However, the traditional "ozone oxidation + coagulation + precipitation + filtration" process is comp...

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Problems solved by technology

[0003] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a method and device that can change the ozone dosing sequence in the micro-bubble ozone-coagulation-air flotation process, which can solve the problem of complex and lengthy traditional processes and large footprints. At the same time, the order of ozone dosing can be changed according to the raw water quality, making the advanced treatment of sewage more targeted

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