MABR and CH4MBfR combined device for treating p-nitrophenol-containing wastewater

Abstract

The invention discloses an MABR and CH4MBfR combined device for treating p-nitrophenol-containing wastewater. The device comprises a wastewater storage device, an MABR device and a CH4-MBfR device which sequentially communicate with one another, and an intermediate water outlet tank is connected between the MABR device and the CH4-MBfR device. According to the invention, the advantages of the twomembrane reactors are fully combined, p-nitrophenol can be effectively degraded, deep denitrification is realized, and the effluent is discharged after reaching the standard. As the MABR adopts bubble-free aeration, the oxygen utilization rate is high and can reach 100%, the oxygen mass transfer range is relatively small, the toxicity is reduced under the action of hydrolytic acidification and thelike of anaerobic layer florae, and then metabolism mineralization degradation is conducted through aerobic and facultative layer florae; and a denitrification type methane anaerobic oxidation florabiological membrane in the CH4-MBfR main body reactor can be used for effective and deep denitrifying, a large amount of methane flora exists in the microbial membrane, part of methane can be suppliedto the biological membrane, the adding cost of a carbon source is saved, and the emission of methane greenhouse gas is reduced.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a device for finely treating wastewater containing p-nitrophenol by using a combined method. Background technique [0002] p-Nitrophenol is both a phenolic compound and a nitroaromatic compound. It has high chemical stability, low biodegradability, and poses a potential danger to the ecosystem. It is listed as a priority pollution control by the US Environmental Protection Agency (USEPA) It is also one of the key harmful pollutants to be dealt with in my country's water pollution control. p-Nitrophenol is a widely used fine organic chemical intermediate, which is widely used in the fields of pesticides, medicines, dyes, explosives, petrochemicals, paints and anticorrosion. [0003] The treatment methods of p-nitrophenol wastewater mainly include physical methods, chemical methods and biological methods. Among them, physical methods and chemical methods, such as adsor...

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Problems solved by technology

[0003] The treatment methods of p-nitrophenol wastewater mainly include physical methods, chemical methods and biological methods. Among them, physical methods and chemical methods, such as adsorption methods, extraction methods, oxidation methods, etc., have many disadvantages, and their processes are complicated, high in cost and prone to secondary pollution. pollution, biological treatment of p-nitrophenol is ideal, not only can be effectively degraded, but also does not require complex pretreatment and extraction, etc. At present, the research on microbial degradation of p-nitrophenol is mostly in the low-to-medium concentration range, and many studies have found that it is difficult Remove a large amount of nitrite produced in the process of microbial degradation, and organic pollutants are highly toxic and have a strong inhibitory effect on microorganisms

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