Device and method for electrolysis dephosphorization of small/medium-size sewage treatment equipment

Abstract

The invention discloses a device and a method for electrolysis dephosphorization of small / medium-size sewage treatment equipment. The device comprises an electrolysis plate, an adjustable power supplydevice, a time controller, an intermediate relay and a volt-ammeter; the adjustable power supply device is used for supplying variable power voltage to the electrolysis plate and controlling volume of electrolyzed iron ions or aluminum ions; the time controller is used for supplying a time signal to the electrolysis plate and is used for automatically changing anode and cathode of the electrolysis plate through the adjustable power supply device; the intermediate relay is used for sending the time signal and a power signal outputted by the adjustable power supply device to the electrolysis plate; the volt-ammeter is used for sampling real-time voltage and current of the electrolysis plate in real time. According to the invention, total phosphorus can be effectively removed by placing thedevice for electrolysis dephosphorization on the front side of an anoxic zone, electrolyzing feeding water and reflux liquid in high oxygen content of system and adopting a multi-level precipitating structure and a special filler arranged in the anoxic zone and a multi-level baffling manner. Energy consumption can be effectively saved and maintenance period can be prolonged in the manner of adjusting voltage and current and automatically switching anode and cathode.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an electrolytic dephosphorization equipment and method for small and medium-sized sewage treatment equipment. Background technique [0002] my country is currently in a period of rapid development of rural transformation, and the problem of rural sewage discharge is particularly prominent. The amount of sewage is large and scattered, and it is difficult to centralize treatment. Therefore, small and medium-sized sewage treatment equipment has the characteristics of easy implementation, wide distribution, and less environmental restrictions. It can be obtained Extensive use in rural markets. [0003] At present, there are usually two methods for phosphorus removal in sewage: biological method, chemical precipitation method and their combined process. However, the phosphorus removal efficiency of the biological method is not stable enough to meet the increasingly stringent ...

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Problems solved by technology

[0006] In order to overcome the deficiencies in the above-mentioned prior art, the purpose of the present invention is to provide a kind of electrolytic dephosphorization equipment and method for small and medium-sized sewage treatment equipment, by using double iron electrolytic plates or double aluminum electrolytic plates or aluminum / iron plates Placed in the front section of the anoxic area, it solves the problem of anode passivation and red water. The electrolysis is the reflux liquid of the aeration tank or the sedimentation tank. There is no need for separate aeration, and the positive and negative electrodes are exchanged, which also increases the use time. Reduce the voltage and put special fillers in the anoxic area to achieve the purpose of stable phosphorus removal for small and medium-sized sewage treatment equipment. The electrolytic phosphorus removal plate is not easy to passivate and the energy consumption is also low, and has no adverse effects on other indicators.

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