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Bio-contact oxidation phosphorus removal process

A biological contact and process technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, dehydration/drying/concentrated sludge treatment, etc. good removal effect

Active Publication Date: 2013-04-24
JIANGSU BAOLING CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] For those containing chlorpyrifos, 0,0-diethyl O-(dichloro-2-pyridyl) phosphorothioate, tetraethyl dithiopyrophosphate, phosphorous acid, sodium phosphite, profenofos, 0-ethyl Phosphorus-containing wastewater containing S-propyl O-(2,4-dibromophenyl) phosphorothioate and other substances, the removal effect of conventional biological contact oxidation on total phosphorus cannot reach the standard of ≤8mg / L, and the discharge cannot meet the standard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A biological contact oxidation phosphorus removal process comprises the following steps in sequence:

[0025] (1) Collect the wastewater to be treated in the blending pool for blending, the range of total phosphorus is 30mg / L~40mg / L;

[0026] (2) Input the wastewater into the biochemical aeration tank. At the third entrance of the biochemical aeration tank, through the liquid alkali metering tank, adjust the pH with liquid alkali to control pH8.0~9.0; liquid alkali addition method: use biochemical aeration The existing air in the air tank is aerated and mixed from the bottom;

[0027] (3) In the middle of the third gear of the biochemical aeration tank, add phosphorus removal agent dropwise, the amount of addition is 0.05%~0.1% of the wastewater volume; method of adding phosphorus removal agent: use the existing air in the biochemical aeration tank, from Bottom aeration mixing;

[0028] (4) At the outlet of the third stage of the biochemical aeration tank, add coagula...

Embodiment 2

[0040] A biological contact oxidation phosphorus removal process comprises the following steps in sequence:

[0041] (1) Collect the wastewater to be treated into the blending pool for blending, the total phosphorus range is 40mg / L~80mg / L;

[0042] (2) Input the wastewater into the biochemical aeration tank. At the third entrance of the biochemical aeration tank, through the liquid alkali metering tank, adjust the pH with liquid alkali to control pH8.0~9.0; liquid alkali addition method: use biochemical aeration The existing air in the air tank is aerated and mixed from the bottom;

[0043] (3) In the middle of the third stage of the biochemical aeration tank, add phosphorus removal agent dropwise, the amount of addition is 0.15%~0.3% of the wastewater volume; method of adding phosphorus removal agent: use the existing air in the biochemical aeration tank, from Bottom aeration mixing;

[0044] (4) At the outlet of the third stage of the biochemical aeration tank, dropwise ad...

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PUM

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Abstract

The invention discloses a bio-contact oxidation phosphorus removal process. The process comprises the following steps of: collecting wastewater to be treated into a mixing tank and mixing, wherein total phosphorus range is 30-100mg / L; inputting the wastewater into a biochemical aeration tank, and in the biochemical aeration tank, through a liquid alkali measurement groove, regulating the pH value to 8.0-9.0 through liquid alkali; in the biochemical aeration tank, dropping a phosphorus removal agent which is 0.05-0.3% of the amount of the wastewater; in the biochemical aeration tank, dropping a coagulant aid which is 0.05-0.1% of the amount of the wastewater; and making the wastewater in the biochemical aeration tank flow into a secondary sedimentation tank through gravity, settling in the secondary sedimentation tank through the gravity, conveying settled sludge through a pump and mixing with the coagulant aid, separating and packing through a belt filter press, and treating the filtered water through the biochemical aeration tank once again. The bio-contact oxidation phosphorus removal process disclosed by the invention has an excellent effect of removing the total phosphorus, and the total phosphorus content of the treated wastewater can reach a standard of being not greater than 8mg / L, so as to achieve up-to-standard discharge.

Description

technical field [0001] The invention relates to a biological contact oxidation phosphorus removal process. Background technique [0002] For those containing chlorpyrifos, 0,0-diethyl O-(dichloro-2-pyridyl) phosphorothioate, tetraethyl dithiopyrophosphate, phosphorous acid, sodium phosphite, profenofos, 0-ethyl Phosphorus-containing wastewater containing S-propyl O-(2,4-dibromophenyl) phosphorothioate and other substances, the removal effect of conventional biological contact oxidation on total phosphorus cannot reach the standard of ≤8mg / L, and the discharge cannot meet the standard. Contents of the invention [0003] The purpose of the present invention is to provide a biological contact oxidation phosphorus removal process with good removal effect on total phosphorus. [0004] The technical solution invented is: [0005] A biological contact oxidation phosphorus removal process is characterized in that: sequentially comprising the following steps: [0006] (1) Collec...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F11/14
Inventor 王加庆林蕴霞唐志明顾树基胡卫平朱文新
Owner JIANGSU BAOLING CHEM