Synchronous nitrogen and carbon removal set and method for wastewater of aquatic product processing

Abstract

The invention belongs to the technical field of wastewater treatment and relates to a synchronous nitrogen and carbon removal set and method for wastewater of aquatic product processing. A fixture for holding combined filler is disposed within a reactor; an aerator is provided below the combined filler; an air compressor is provided outside the reactor; the air compressor is communicated with the aerator through a gas incoming pipe; the same side of the reactor is provided with three valves; a sludge pipe is disposed at the bottom of the reactor; marine heterotrophic nitrifying bacterium added to the reactor grows rich on the combined filler and forms a film before the wastewater of aquatic product process is guided into the reactor, the air compressor introduces oxygen into the reactor, the marine heterotrophic nitrifying bacterium converts ammonia nitrogen into nitrate nitrogen using part of organics as electron donors and converts the nitrate nitrogen into nitrogen to be discharged, using the rest of the organics as carbon sources. The whole process is simple, operating and controlling is flexible, the wastewater can be synchronously subjected to nitrogen and carbon removal, energy consumption is lower, the production cost is low, the economic benefit is good, and the synchronous nitrogen and carbon removal set and method is convenient to popularize and apply.

Description

Technical field: [0001] The invention belongs to the technical field of sewage treatment, and relates to marine aquatic product substances and waste water treatment equipment and technology during product processing, in particular to a device and method for synchronous denitrification and carbon removal of aquatic product processing waste water. Background technique: [0002] The aquatic product processing industry is a typical high water consumption industry, which produces a large amount of wastewater and seriously pollutes the environment. The wastewater produced by aquatic product processing has high organic matter concentration, high ammonia nitrogen concentration, high total phosphorus concentration, high salinity and low water temperature" The characteristics of "four high and one low", the higher salinity in wastewater will lead to an increase in osmotic pressure, which will cause the separation of microorganisms and affect the treatment effect of wastewater; in addit...

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Problems solved by technology

[0002] The aquatic product processing industry is a typical high water consumption industry, which produces a large amount of wastewater and seriously pollutes the environment. The wastewater produced by aquatic product processing has high organic matter concentration, high ammonia nitrogen concentration, high total phosphorus concentration, high salinity and low water temperature" The characteristics of "four high and one low", the higher salinity in wastewater will lead to an increase in osmotic pressure, which will cause the separation of microorganisms and affect the treatment effect of wastewater; in addition, due to the higher density of wastewater, it is more likely to cause activated sludge The floating loss of the water makes it difficult for conventional sewage treatment processes to meet the national or local sewage treatment discharge standards.

In order to overcome these difficulties, Chinese patent CN 102020381A discloses a technical solution for treating aquatic product processing wastewater by using cobblestone adsorption, filtration, pH adjustment, flocculation sedimentation, filtration and oxidation flocculation sedimentation, filtration and shell fragment adsorption process, Chinese patent CN 102863098A discloses a process for treating water using grid interception, solid suspended matter separation, oil removal device, mixed adsorption of pebbles and shells, filtration, pH adjustment, flocculation precipitation, filtration, oxidation flocculation precipitation, and secondary filtration of shell fragments Technical scheme for product processing wastewater, Chinese patent CN 202610074U discloses a technical scheme for processing wastewater from aquatic product processing using sediment grease trap, hydrolysis acidification tank, CASS reaction device, aeration fan and sludge collection device, Chinese patent CN 203269717U discloses a technical scheme for processing wastewater from aquatic product processing using sedimentation tanks, regulating tanks, pre-aeration tanks, activated sludge tanks, sedimentation tanks, sand filters and sludge tanks. Chinese patent CN 103910468A discloses A technical scheme for treating aquatic product processing wastewater by adopting grid interception, oil removal and sedimentation, mixed adsorption, nitrification treatment, contact oxidation treatment, membrane filtration, ultraviolet sterilization and pH value adjustment. The process is lengthy, the process is complex, the amount of raw materials is large, the wastewater treatment index is low, and the production environment is not friendly. Moreover, these existing solutions are mainly aimed at the removal of organic matter in wastewater, and there is no significant wastewater denitrification function.

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