Denitrification and decarbonizing treatment system and method of landfill leachate in late period

A landfill leachate and carbon treatment technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as high cost and difficulty in reaching the standard of effluent total nitrogen, and prevent churn effect

Active Publication Date: 2018-12-21
SUZHOU UNIV OF SCI & TECH
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  • Claims
  • Application Information

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Problems solved by technology

Therefore, when it is applied to the treatment of old landfill leachate, especially high ammonia nitrogen (NH 4 + -N>1000mg/L) concentration of wastewater treatment, at least 100mg/L of nitrate will be produced, and the total nitrogen in t

Method used

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  • Denitrification and decarbonizing treatment system and method of landfill leachate in late period
  • Denitrification and decarbonizing treatment system and method of landfill leachate in late period
  • Denitrification and decarbonizing treatment system and method of landfill leachate in late period

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Embodiment 1

[0067] The system of the present invention is used to treat late-age landfill leachate from a certain landfill in Suzhou. The landfill has been in operation for more than 20 years. Winter is the dry season, and the wastewater quality is characterized by COD 1800-2200mg / L, BOD 400-500mg / L, NH 4 + -N 1700~1900mg / L, pH 7.7~8.1.

[0068]Two sets of UASB were used as the denitrification reactor and the anammox reactor respectively, with an effective volume of 1.8L. An upflow membrane bioreactor is used as a partial nitrosation reactor with an effective volume of 9L. Denitrification reactors are inoculated with denitrification granular sludge; some nitrification reactors use mature nitrosation biofilms, and the pH value is controlled at 8. The anammox reactor was inoculated with domesticated anammox granular sludge, and the pH value was controlled at 8. The concentration tank adopts cellulose acetate membrane and RO membrane with a pore size of 0.45 μm, and the effective volume...

Embodiment 2

[0072] In summer, due to excessive rain, the concentration of late-age landfill leachate is at the lowest value in a year, and the system of the present invention is used to treat the landfill leachate in this period. The water quality of landfill leachate in the flood season is COD 1100~1300mg / L, BOD200~350mg / L, NH 4 + -N 1000~1250mg / L, pH 7.8~8.1.

[0073] Two sets of UASB were used as the denitrification reactor and the anammox reactor respectively, with an effective volume of 1.8L. An upflow reactor is used as a partial nitrosation reactor with an effective volume of 9L. The denitrification tank is inoculated with mature denitrification biofilm. Some nitrosation reactors use mature nitrosation biofilms. The anammox reactor is inoculated with the anammox granular sludge that has been domesticated. The concentration tank adopts cellulose acetate membrane and RO membrane with a pore size of 0.45 μm, and the effective volume is 5L. The effective volume of the oxidation p...

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Abstract

The invention provides a denitrification and decarbonizing treatment system and method of landfill leachate in a late period, and belongs to the field of wastewater treatment. The system comprises a denitrification reactor, a nitrosation reactor, an anaerobic ammonia oxidation reactor, a concentrating pool, an oxidization pool and two return-flow system. According to the system, the concentratingpool is arranged and used for intercepting nondegradable organic substances in water output through the anaerobic ammonia oxidation reactor; the nondegradable organic substances can be oxidized into degradable organic substances through the oxidization pool, so that a carbon source is supplied to the denitrification process; the return-flow system supplies a proper environment to microorganism, and wastewater can be treated with high efficiency and low consumption; with the adoption of the system for treating the landfill leachate in the late period, the high independence of the denitrification process on additional organic substances can be avoided, so that demands on the organic substances can be decreased, and the denitrification cost of the landfill leachate can be decreased.

Description

technical field [0001] The invention relates to the technical field of waste water treatment, in particular to a treatment system and method for denitrification and carbon removal of late-age landfill leachate. Background technique [0002] With the rapid increase in the amount of domestic waste in my country, the landfill capacity of many domestic waste landfills continues to expand, and the resulting amount of landfill leachate is also increasing. According to the material composition of landfill and the time of landfill, the water quality and quantity of landfill leachate also change greatly. Generally speaking, early landfill leachate is a type of wastewater containing high concentrations of ammonia nitrogen and organic matter, most of which are degradable organic matter, which can be treated by conventional biochemical treatment processes. However, with the prolongation of the landfill time, the organic matter in the wastewater is gradually dominated by non-degradable ...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/30
Inventor 李祥黄勇顾晓丹
Owner SUZHOU UNIV OF SCI & TECH
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