Combination method for treating pickled vegetable processing wastewater based on anaerobic ammonia oxidation

Abstract

The invention discloses a combination method of treating pickled vegetable processing wastewater based on anaerobic ammonia oxidation. The combination method comprises the following steps that pickled vegetable processing wastewater firstly enters a first regulating reservoir to carry out alkalinity control and enters an ASBBR reactor to carry out anaerobic treatment for converting organic nitrogen into ammonia nitrogen; outlet water of the ASBBR reactor flows into a second regulating reservoir to carry out alkalinity control, and then enters SBR (Sequencing Batch Reactors) to carry out half-nitritation, NO2--N / NH4<+>-N of the SBR reactor outlet water is controlled between 1 and 1.3, so that inlet water needs for the anaerobic ammonia oxidation process are satisfied; the outlet water of the SBR enters a third regulating reservoir to perform alkalinity control, and then performs anaerobic ammonia oxidation reaction in a UASB (Upflow Anaerobic Sludge Blanket) reactor. The combination method disclosed by the invention can be adaptive to salinity of the pickled vegetable processing wastewater very well, and can efficiently remove high-concentration organic substances and high-concentration nitrogen in the pickled vegetable processing wastewater at the same time, is low in energy consumption and less in sludge yield.

Description

technical field [0001] The invention relates to the improvement of wastewater treatment technology, in particular to a method for treating pickled mustard wastewater by using the combined process of ASBBR anaerobic-SBR partial nitrosation-UASB anaerobic ammonium oxidation, belonging to the field of wastewater biological treatment. [0002] Background technique [0003] Mustard industry, as a characteristic pillar industry in the Three Gorges reservoir area, produces a large amount of waste water with high concentration of organic matter and high concentration of nitrogen in the process of mustard processing every year. If the wastewater without effective treatment is directly discharged into the reservoir area, it will inevitably cause great harm to aquatic organisms, drinking water and agricultural production water. [0004] At present, the treatment methods adopted for mustard mustard wastewater treatment are mainly physical methods, chemical methods, biological methods a...

AI Technical Summary

Problems solved by technology

Most of these mustard wastewater treatment processes have high investment, high energy consumption, low efficiency, and ineffective treatment effects, and it is difficult to efficiently remove high-concentration organic matter and high-concentration nitrogen at the same time

In order to change this situation, there is an invention patent application 201310035689.7 in the prior art, which discloses a mustard wastewater treatment process. This method makes the wastewater pass through the grid → regulating pond → phosphorus removal sedimentation pond → hydrolysis acidification pond → contact anaerobic pond → The intermediate sedimentation tank → CASS tank is discharged after reaching the standard. While removing organic matter, it has a high denitrification function, but this method is more complicated, the capital construction cost is high, and it cannot handle high-concentration nitrogen wastewater.

Invention patent application 201310022920.9 discloses a high-concentration mustard mustard wastewater resource treatment method, which uses microbial fuel cells (MFC) in mustard mustard wastewater treatment to solve the problems of poor treatment of organic pollutants in mustard mustard wastewater and high operating costs in the prior art , but this method does not efficiently remove nitrogen from pickled mustard wastewater

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