Deep treatment process of coking wastewater

A technology for coking wastewater and advanced treatment, which is used in water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. It can solve the problem that the treatment index cannot meet the new national discharge standard and the advanced treatment technology cannot be removed. and other problems, to achieve the effect of stable water output, small footprint and good removal effect.

Active Publication Date: 2014-02-05
RUITIAN SECURITY & ENVIRONMENTAL PROTECTION CO LTD PANZHIHUA GANGCHENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] At present, the advanced treatment of coking wastewater is aimed at reuse as supplementary water for the circulating water system, and its treatment indicators still cannot meet the new national discharge standards, especially total nitrogen, which cannot be removed by current advanced treatment technologies

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] In this embodiment, the coking wastewater advanced treatment technology process, the influent adopts the coking wastewater biochemically treated by anoxic-aerobic (A / O) or anaerobic-anoxic-aerobic (A1-A2-O) activated sludge method , the water quality is shown in Table 2:

[0048] Table 2 embodiment one influent water quality physical and chemical index

[0049] serial number

[0050] Sulfuric acid solution is added to the wastewater through the pH adjustment tank, and the pH value is adjusted to 1 to 3. After stirring evenly, it is pumped into the micro-electrolysis reaction device with a lift pump, and the upper-flow water distribution is adopted. After the micro-electrolysis reaction, the effluent enters the coagulation sedimentation tank , first add sodium hydroxide solution, adjust the pH value to 8-9, stir evenly and then add anionic polyacrylamide 1.0mg / L, set a sludge discharge port at the bottom of the coagulation sedimentation tank, and discharge the ...

Embodiment 2

[0056] In the coking wastewater advanced treatment process described in this embodiment, the influent is biochemically treated by anoxic-aerobic (A / O) or anaerobic-anoxic-aerobic (A1-A2-O) activated sludge method The coking waste water, water quality is as shown in table 4:

[0057] Table 4 embodiment two inlet water quality physical and chemical indicators

[0058] serial number

Indicator name

Influent water quality

1

pH

8.7

3

CODcr

189mg / L

4

Ammonia nitrogen

9.42mg / L

5

total nitrogen

75.9mg / L

[0059] Sulfuric acid solution is added to the wastewater through the pH adjustment tank, and the pH value is adjusted to 1 to 3. After stirring evenly, it is pumped into the micro-electrolysis reaction device with a lift pump, and the upper-flow water distribution is adopted. After the micro-electrolysis reaction, the effluent enters the coagulation sedimentation tank , first add sodium hydroxide solu...

Embodiment 3

[0064] In the coking wastewater advanced treatment process described in this embodiment, the influent is biochemically treated by anoxic-aerobic (A / O) or anaerobic-anoxic-aerobic (A1-A2-O) activated sludge method The coking wastewater, water quality as shown in Table 6 below:

[0065] Table 6 embodiment three influent water quality physical and chemical indicators

[0066] serial number

Indicator name

Influent water quality

1

pH

9.6

3

CODcr

219mg / L

4

Ammonia nitrogen

3.95mg / L

5

total nitrogen

67.3mg / L

[0067] Sulfuric acid solution is added to the wastewater through the adjustment tank, and the pH value is adjusted to 1-3. After stirring evenly, it is pumped into the micro-electrolysis reaction device with a lift pump, and the upper-flow water distribution is adopted. After the micro-electrolysis reaction, the effluent enters the coagulation sedimentation tank. First add sodium hydroxide solu...

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Abstract

The invention discloses a deep treatment technique of coking wastewater, in particular discloses a deep treatment technique of coking wastewater in which pretreatment is combined with denitrification and efficient denitrification treatment of a preposed anaerobic biofilter, and belongs to the technical field of wastewater treatment. The process comprises the steps of: carrying out anoxic-aerobic or anaerobic-anoxic-aerobic activated sludge process based biochemical treatment on the wastewater, and then orderly treating the wastewater in a pH regulating reservoir, a micro-electrolysis reaction device, a coagulative precipitation tank, an anaerobic biofilter and an aerobic biofilter, wherein the a micro-electrolysis reaction filler is mounted in the micro-electrolysis reaction device, so that non-degradable organic matters in the wastewater can be decomposed into degradable organic matters through a micro-electrolysis reaction; as a result, sufficient carbon source is provided for biological denitrification while the biochemical efficiency is improved. The anaerobic biofilter based treatment process is adopted by the deep treatment, so that the removal effect of total nitrogen by the system is improved and the problem that the total nitrogen cannot be removed by the traditional process is solved. The yielding water obtained after the treatment of the process provided by the invention is capable of stably reaching the standard; no extra carbon source is needed.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and relates to an advanced treatment technology for coking wastewater, more specifically, an advanced treatment technology for coking wastewater that combines pretreatment and pre-anaerobic biofilter denitrification and high-efficiency denitrification treatment. Background technique [0002] Coking wastewater is a difficult problem in the field of industrial wastewater treatment at home and abroad. In the coking process, in addition to about 75% of the coal being turned into coke, about 25% of the coal is produced into various chemical products and gas. Coking wastewater is produced in the process of high-temperature dry distillation of raw coal, gas purification and refining of chemical products. The composition of wastewater is complex, and its water quality varies with the composition of raw coal and the coking process. Coking wastewater contains dozens of inorganic and organic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/461C02F3/30
Inventor 贺坤茂潘碌亭谢永生万新丰李汝珍
Owner RUITIAN SECURITY & ENVIRONMENTAL PROTECTION CO LTD PANZHIHUA GANGCHENG GRP
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