Synchronous biochemical advanced oxidation liquid waste treatment method and device

Abstract

The invention discloses a synchronous biochemical advanced oxidation liquid waste treatment method and device. The device comprises a biological reaction tower and a gas dissolution pump. The gas dissolution pump is communicated with a water suction pipe on the top of the biological reaction tower and a through hole water pipe at the bottom of the biological reaction tower. The gas dissolution pump is used for pumping liquid waste from a water collection pool into the biological reaction tower to drive water circulation inside the tower. Two packing layers are arranged inside the biological reaction tower, wherein granular catalysis biological packing is placed on the upper layer, and suspension packing is placed on the lower layer. The granular catalysis biological packing is placed in the middle of the biological reaction tower, the water through water pipe is arranged at the bottom of the tower, and an ultrasonic transducer amplitude-change pole is placed above the biological reaction tower; the processing capacity is high, organic loads are high, the processing effect is 2-3 times higher than that of processing technologies of the same kind, the device has the advantages of being low in investment, small in occupied land and the like, the advanced oxidation technology, the ultrasonic decomposition technology and microbiological degradation technology are integrated, and the device has the advantages of being easy and convenient to operate and maintain, high in purification efficiency, low in investment and operation cost and the like, and is particularly applicable to processing organic liquid waste hard to degrade on the condition of intensified land occupation.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment and relates to the treatment technology of high-salt and high-concentration refractory organic wastewater, in particular to a method and device for synchronous biochemical advanced oxidation treatment of waste liquid. Background technique [0002] At present, there are many treatment technologies for high-salt, high-concentration and refractory organic wastewater. Commonly used methods include advanced oxidation methods, physicochemical methods, and biological methods, among which advanced oxidation methods generally include Fenton, wet catalytic oxidation, and physical field collaborative advanced oxidation. Technology, biochemical methods generally include anaerobic, facultative and aerobic treatment technologies. The above several technologies have their own advantages and are suitable for the treatment of organic wastewater in different occasions. Better results can be achieved through...

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Problems solved by technology

[0003] (1) Conventional advanced oxidation technology has a large investment and high operating cost, especially in the treatment process of high-salt, high-concentration refractory organic wastewater, but it is also difficult to treat up-to-standard discharge, and subsequent biochemical (or other technical) facilities are required , although the use of physical field coordination (such as ultrasonic, ultraviolet, microwave) can speed up the reaction speed and improve the removal rate, it is still difficult to ensure the discharge standard, and the distance between the left and right of the physical field is generally short, and the effect on the reaction device with a large diameter is poor;

[0004] (2) Biochemical treatment of high-salt, high-concentration refractory organic wastewater, regardless of anaerobic, facultative or aerobic treatment technologies, often has problems such as difficulty in cultivating bacteria or poor impact resistance, although the operating cost is lower than that of advanced oxidation technologies , but the one-time investment cost is high and the land occupation is large, and it is often difficult to meet the standards for waste liquid with complex mixed pollutants

In addition, refractory organic matter in water is difficult to decompose or utilize, and does not contribute to denitrification or even has side effects

Wastewater often lacks trace elements such as Mg, Zn, Mo, Co, Mn and Fe required for microbial metabolism, which is also an important reason for poor biochemical effects;

[0005] (3) At present, advanced oxidation and then biochemical treatment are mostly used to pre-decompose some organic matter or convert it into small molecular organic matter that can be easily decomposed by microorganisms. However, the combined investment, land occupation and operating costs of this process are high, and Advanced oxidation uses strong oxidants to have adverse effects on subsequent biochemistry (especially anaerobic);

[0006] Conventional single technology has been difficult to discharge high-salt, high-concentration refractory organic wastewater to meet increasingly stringent environmental protection requirements. Under the new situation, it is necessary to consider the combination of different technologies, or even integrate them into the same reaction device to give full play to their respective advantages. , to overcome their respective shortcomings, to ensure discharge standards

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