Wastewater treatment system and treatment method of wastewater treatment system

Abstract

The invention discloses a wastewater treatment system and a treatment method of the wastewater treatment system. The wastewater treatment system comprises a water collection tank, a buffering tank, anadjusting kettle, a first buffering tank, an MVR evaporation system, an adjusting tank, an adsorption system, a second buffering tank, and an ammonia-nitrogen removing system; an outlet of the watercollection tank is connected with an inlet of the buffering tank, the outlet of the buffering tank is connected with the inlet of the adjusting kettle, the outlet of the adjusting kettle is connectedwith the inlet of the first buffering tank, the outlet of the first buffering tank is connected with the inlet of the MVR evaporation system, the outlet of the MVR evaporation system is connected withthe inlet of the adjusting kettle, the outlet of the adjusting kettle is connected with the inlet of the adsorption system, the outlet of the adsorption system is connected with the inlet of the second buffering tank, and the outlet of the second buffering tank is connected with the inlet of the ammonia-nitrogen removing system. The wastewater treatment system can realize cyclic utilization on the wastewater.

Description

technical field [0001] The invention relates to the technical field of resources and environmental protection, in particular to a wastewater treatment system and a method thereof. Background technique [0002] As an emerging industrial country, China produces a wide variety of industrial wastewater with a huge volume. The discharge of wastewater has seriously affected the watershed environment and the health of residents. Among them, the direct discharge of high-ammonia nitrogen wastewater will damage the local ecological environment. The eutrophication of the waters has caused the death of a large number of fish and shrimp, and wasted valuable ammonia nitrogen. Therefore, when treating this type of wastewater, not only the wastewater must be discharged up to the standard, but also the ammonia nitrogen resources must be recovered. [0003] At present, the treatment methods of ammonia nitrogen wastewater mainly include stripping method, steam stripping method, membrane separa...

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Problems solved by technology

This process can effectively reduce the probability of sticky tubes caused by long-term operation of the evaporator, but it has the following disadvantages: (1) The pretreatment process is long, and the pH must be adjusted frequently, which increases the operating intensity; (2) The pH of the iron-carbon micro-electrolysis process The value is constantly increasing, and a certain amount of aeration is required at the same time, so the loss of ammonia nitrogen in the ammonium salt-containing wastewater is caused, the total nitrogen content of the recovered ammonium salt is reduced, and the escape of ammonia gas will cause secondary pollution of the surrounding environment; (3 ) The waste water is subjected to iron-carbon micro-electrolysis and Fenton oxidation in turn after the pH value is adjusted by homogenizing the water quality. Since the COD of the waste water is large and the load of pretreatment is large, the output of iron sludge is large, and the consumption of iron-carbon and hydrogen peroxide is large. high cost

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