Phenol-amine wastewater treatment and recycling method and device

Abstract

The invention discloses a phenol-amine wastewater treatment and recycling method and device. The device comprises a water collection tank, a primary settling tank, an adjusting tank, a stripping and ammonia absorption system, an A / A / O-the MBR reaction tank, a biochar hydrolysis, nitrification and fluidization system and an immersed ultrafiltration system which are connected in series according tothe flow of the wastewater treatment. The device of the invention adopts the method combining the main physicochemical technology and the auxiliary biochemical technology, thus effectively reducing the operating cost, wherein the physicochemical technology is mainly used to reduce the concentration of ammonia nitrogen, remove suspended matter (SS) and insoluble, slightly soluble and refractory CODcr and increase the B / C ratio; and the biochemical technology is mainly used to remove CODcr and BOD5 and reduce the chroma. The device of the invention has very good treatment effect on the wastewater with high ammonia nitrogen and high phenolic compounds; and the treated wastewater meets the discharge standards and can be directly discharged or further treated for reuse, thus saving the energy.

Description

technical field [0001] The present invention relates to a wastewater treatment and reuse method and device, in particular to a method and device for phenolamine wastewater treatment and reuse, which can effectively treat and reuse high phenolic and high ammonia nitrogen wastewater , which belongs to the field of environmental engineering technology. Background technique [0002] Coking wastewater is high-concentration organic wastewater produced in the process of coal coke, gas purification and coking product recovery. Its composition is complex, containing a large amount of organic pollutants such as phenols, biphenyl, pyridine, indole and quinoline, as well as toxic and harmful substances such as cyanide, inorganic fluoride ions and ammonia nitrogen. The pollutants have high chroma and are relatively difficult to biodegrade. High concentration organic industrial wastewater. Therefore, the treatment of coking wastewater has always been a major problem in the field of wast...

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Problems solved by technology

(4) Coagulation and sedimentation are often used in post-treatment to reduce suspended solids and organic matter in the final effluent. A few coking plants use physical and chemical technologies such as carbon filtration, zeolite filtration or oxidation, so that the final effluent quality is significantly better than ordinary solid-liquid separation technology, but high processing cost

(6) Although physical and chemical post-treatment or adding dilution water are used, there are not many domestic coking wastewater discharged up to the standard, and COD or (and) ammonia nitrogen is still a difficult problem in the current coking wastewater treatment.

In some cases, the concentration of ammonia nitrogen in the effluent can be reduced to below 25mg / L under normal conditions, but the nitrification system is relatively fragile. Once water quality impact occurs, it will take a long time to recover the effect of ammonia nitrogen treatment

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