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Waste water biological treatment method for realizing anaerobic ammoxidation and methanation denitrification coupling

A technology of anaerobic ammonium oxidation and biological treatment, applied in the field of biological treatment of wastewater, can solve the problems of complex process, not coupled together to treat wastewater, and inability to couple

Inactive Publication Date: 2007-10-24
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the effluent from the anaerobic reactor often contains high ammonia nitrogen, which requires further treatment to meet the discharge standard, and further treatment is required in subsequent processes. The usual practice is to connect the nitrification-denitrification process in series after the anaerobic reactor, instead of anaerobic Ammonia oxidation coupled with methanation and denitrification
Since the nitrification reaction consumes a large amount of oxygen and the denitrification process consumes a large amount of organic carbon sources, the process is complicated and the investment and operation costs are increased.
There is currently no method for coupling ANAMMOX with methanation and denitrification to treat wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1EGSB reactor and secondary reactor BAF joint process, its steps are as follows:

[0021] (1) Enrich the sludge with methanating bacteria, denitrifying bacteria and anaerobic ammonia oxidation activity in the expanded granular sludge bed reactor;

[0022] Wastewater components: COD concentration, 500mg / L; (NH 4 ) 2 SO 4 , 7.6mg / L; KH 2 PO 4 , 3.04mg / L; K 2 HPO 4 , 3.96mg / L; NaHCO 3 , 2000mg / L; NH 4 Cl, 148.6mg / L; NaNO 2 , 187.5mg / L; solution containing trace elements, 2.0mL / L. Composition of trace element solution: EDTA, 5.0g / L; FeSO 4 ·7H 2 O, 5.0mg / L; ZnSO 4 .7H 2 O, 2.2g / L; CoCl 2 .6H 2 O, 1.6g / L; CaCl 2 .2H 2 O, 5.5g / L; MnCl 2 .4H 2 O, 5.0g / L; CuSO 4 .5H 2 O, 1.6g / L; MgSO 4 .7H 2 O, 5.0g / L; (NH 4 ) 6 Mo7 o 24 .4H 2 O, 1.1g / L; NiSO 4 .6H 2 O, 0.42g / L.

[0023] Inoculate 22g of anaerobic granular sludge into an EGSB reactor with a volume of 1.5L in the reaction zone, and the volume loading rate is 4.8kg COD / (m 3 .d) and 0.768k...

Embodiment 3E

[0032] Embodiment 3EGSB+SBR combined process

[0033] Enrich and inoculate granular sludge with methanation, denitrification and anaerobic ammonium oxidation activities in the expanded granular sludge bed reactor, enrich and inoculate 1200mg COD / L aerobic ammonia oxidizing bacteria in the SBR reactor Specific operation Same as Example 1. The raw wastewater influent enters from the bottom of the EGSB reactor, and the return flow is adjusted so that the rising flow rate of the EGSB reactor is 4.86m / h; the top of the EGSB exits the water, and the EGSB effluent enters from the bottom of the SBR, and four SBR reactors are connected in parallel. The effective volume of the reactor is 4.7L, and the operation cycle of each reactor is 8h: water inflow for 2h, aeration for 3h, sedimentation for 1h, drainage for 2h; 4 reactors operate alternately. The probes of the DO and pH online control instruments were placed in the SBR reactor, and sodium bicarbonate (NaHCO 3 ) to adjust the pH ra...

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PUM

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Abstract

The invention discloses a biological disposing method of waste water through coupling the anaerobic ammonoxidation and methanation denitrification, which is characterized by the following: inoculating the particle sludge with methanation, denitrification and anaerobic ammonoxidation activity in the expansion grain sludge bed (EGSB); inoculating aerobic ammonoxidation bacteria in the biological aerating filter (BAF) or SHARON technique or SBR reactor; connecting the EGSB reactor and BAF or SHARON technique or SBR reactor; realizing the biological disposal of waste water through controlling pH value, temperature, dissolved oxygen, external reflow rate, load velocity, oxidizing reducing potential and organic COD density, ammonia nitrogen density.

Description

technical field [0001] The invention relates to a biological treatment method for wastewater, in particular to a biological treatment method for wastewater that realizes the coupling of anaerobic ammonium oxidation and methanation and denitrification. Background technique [0002] The main feature of the upflow series anaerobic reactor technology for treating wastewater is the high concentration of sludge (30g VSS.L -1 ), high volume loading rate (60g COD.(L.d) -1 ), low sludge yield (0.5g VSS.(g COD) -1 ), high COD removal efficiency (90%), and at the same time, organic matter in wastewater is converted into methane (0.35L CH 4 .(g COD) -1 ). However, the effluent from the anaerobic reactor often contains high ammonia nitrogen, which requires further treatment to meet the discharge standard, and further treatment is required in subsequent processes. The usual practice is to connect the nitrification-denitrification process in series after the anaerobic reactor, instead ...

Claims

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Application Information

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IPC IPC(8): C02F3/30
Inventor 张代钧祖波任宏洋阎青丛丽影
Owner CHONGQING UNIV
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