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Method for starting SNAD process based on non-woven fabric ring packing

A non-woven and ring-shaped technology, applied in the field of non-woven ring packing to start SNAD process, can solve problems such as affecting the activity of ANAMMOX bacteria

Active Publication Date: 2015-04-22
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the organic carbon in sewage will seriously affect the activity of ANAMMOX bacteria, and a small amount of by-product nitrate nitrogen is produced in the ANAMMOX reaction. Therefore, how to effectively further remove organic carbon and nitrate in sewage has become the technical bottleneck of this denitrification process.

Method used

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  • Method for starting SNAD process based on non-woven fabric ring packing
  • Method for starting SNAD process based on non-woven fabric ring packing

Examples

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Effect test

Embodiment

[0021] Using a non-woven annular packing to start the SNAD process for nitrogen and carbon removal.

[0022] The size of the filler is Ф40x20mm, and the reactor used is such as figure 1 Shown is a biofilter reactor. The running time of one cycle is 60 days. When the reactor is started, the COD concentration of the feed water is set at 30-140mg / L; ammonium chloride is added to set the NH 4 + -N concentration is 40-60mg / L; add potassium dihydrogen phosphate and dipotassium hydrogen phosphate, set PO 4 3- Concentration is 18-22mg / L, add inorganic salt, set Na + The concentration is 8-12mg / L, K + The concentration is 12-16mg / L, Mg + The concentration is 18-22mg / L, through regular monitoring of COD and NH in the in and out water 4 + -N concentration, control C / N to regulate the denitrification rate, and realize the coupling of short-cut nitrification, ANAMMOX and denitrification.

[0023] The biofilter reactor is made of plexiglass in a cylindrical shape, with a diameter o...

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Abstract

The invention provides a method for starting an SNAD process based on non-woven fabric ring packing and belongs to the technical field of water treatment. One packing is adopted to carry out a nitrosation reaction, an anaerobic ammonia oxidation and a denitrification reaction at the same time in one reactor. The non-woven fabric ring packing is composed of an inner layer non-woven fabric and an outer layer framework. Anaerobic ammonium oxidation bacteria can be bred on the surface of the packing through domestication and cultivation, partial nitrate is transformed into nitrogen through feeding organic carbon sources and domesticated heterotroph type denitrifying bacteria, finally, nitrosobacteria are fed, so the outer layer nitrosobacteria can consume most dissolved oxygen and transform partial ammonia nitrogen into the nitrite; accordingly, degradation substrates at a proper proportion can be provided for growth and metabolism of ANAMMOX bacteria, and meanwhile a beneficial anaerobic environment is provided for the denitrifying bacteria. The method has the advantages of being better in film culturing effect and shorter in domestication period and is a sustainable wastewater treatment technology, thereby being wide in application prospect.

Description

technical field [0001] The invention belongs to the technical field of waste water biological treatment, and relates to a non-woven annular packing which simultaneously undergoes nitrosation, denitrification and anaerobic ammonium oxidation reactions in a biofilter reactor to remove carbon and nitrogen from low-carbon-to-nitrogen ratio sewage. In particular, it relates to a method for starting the SNAD process of a non-woven annular filler. Background technique [0002] At present, my country has made remarkable progress in water pollution control through the "Ninth Five-Year Plan", "Tenth Five-Year Plan" and "Eleventh Five-Year Plan", and the deterioration of water pollution has been curbed, but the water pollution situation has not been fundamentally improved. The characteristics of domestic sewage water quality are: scattered discharge points, small water volume, low C / N (BOD 5 / N≤3.0 or COD / N≤6.0). The traditional process of denitrification has the disadvantage of insuf...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F101/16
CPCC02F3/301C02F3/302C02F2101/16C02F2101/163C02F2101/166C02F2101/30
Inventor 杨凤林邹瑜徐晓晨靳文尧
Owner DALIAN UNIV OF TECH
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