Microbial electrolytic cell-fenton combined treatment device and process for treating furniture wastewater

Abstract

The invention discloses a microbial electrolysis cell-Fenton combined treatment device and process for treating furniture production wastewater. The device comprises an anaerobic baffled reaction zone, an aerobic zone, a Fenton oxidation zone and a secondary sedimentation zone, wherein the anaerobic baffled reaction zone comprises three compartments; an air pump is arranged in each of the aerobic zone and the Fenton oxidation zone; a return sludge pump and a sludge baffle are arranged in the secondary sedimentation zone; such three electrodes as an anode electrode, a first cathode electrode and a second cathode electrode are respectively arranged in the anaerobic baffled reaction zone, the aerobic zone and the Fenton oxidation zone, and connected with a power source through an external circuit; water enters the aerobic zone, the Fenton oxidation zone and the secondary sedimentation zone in sequence for treatment, and then the treated water is discharged. As an integrated system, the device not only has a significant reinforcing effect based on the original microbial treatment technology, but also provides H2O2 for the Fenton oxidation zone through a microbial electrolysis cell, so that the problem that the conventional Fenton oxidation process is high in energy consumption can be solved, and a new technology for treating the furniture production wastewater is provided.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a microbial electrolytic cell-Fenton combined treatment device and process for treating furniture wastewater. Background technique [0002] Furniture production is an important part of my country's industrial production. In recent years, with the continuous development of the industrial level, the traditional manual workshop-style wooden furniture production has gradually transformed into an industrialized and large-scale production method. The demand for wooden furniture is expanding rapidly, and the number of furniture enterprises is also increasing sharply. However, the wastewater generated in the production process of enterprises has not been effectively treated. During wood processing, wood section cutting and peeling process, wood cooking process, drying and rinsing process, etc. will all generate waste water. Among them, the sawdust wastewater is the wastew...

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Problems solved by technology

However, there is no flocculant product with good performance at present, and the effect of using a single sedimentation flocculant is often unsatisfactory. Many experiments are mixed with inorganic polymers and organic polymers. The dosage is relatively large, and the cost of chemicals often accounts for 50% of the treatment cost. above

And after treatment, it is mixed with lignin, even changes the structure of lignin, and it is difficult to separate lignin, which limits the application of lignin and causes new pollution, which is actually pollution transfer.

Hydrolytic acidification is usually used for the pretreatment of high-concentration organic wastewater, but its disadvantage is that the removal rate of organic matter is low, generally not exceeding 20%, and the effect on improving the biodegradability of wastewater is limited

Both micro-electrolysis and anaerobic methods can improve the biodegradability of wastewater, but micro-electrolysis may lead to hardening and passivation of iron and carbon, as well as secondary pollution such as waste residues

The anaerobic method is easy to operate and has low operating costs, but the acclimation time of anaerobic sludge is relatively long and the degradation rate is relatively slow

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