Electric enhanced internal circulation anaerobic reactor and method thereof

A technology of anaerobic reactor and anaerobic reaction zone, which is applied in the field of electric enhanced internal circulation anaerobic reactor, can solve the problems of poor sludge activity, low COD removal rate, and treatment effect to be further improved, so as to improve the reliability Biochemical property, improvement of treatment effect, effect of enhancing detoxification ability

Pending Publication Date: 2020-09-15
NANJING INNOVATION CENT FOR ENVIRONMENTAL PROTECTION IND
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AI-Extracted Technical Summary

Problems solved by technology

[0007] Aiming at the problems that the IC anaerobic reactor has poor sludge activity, low COD removal rate, and treatment effect to be further improved i...
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Method used

Carry out the method for waste water treatment by adopting electric enhancement type internal circulation anaerobic reactor of the present invention, not only can improve the biodegradability of waste water, guarantee the stable operation of anaerobic biological system in the reactor, and can realize activated sludge , the role of auxiliary sludge granulation.
It should be further illustrated that, in the device of the present invention, the quantity of the electrochemical unit 111 provided in the electrochemically activated detoxification zone 110 can be 1 or Y, and the specific quantity can be based on the concentration of waste water and biodegradability ( B/C ratio) decision to enhance the detoxification capacity of the reactor;
Wherein, electrochemical cell 111 comprises ...
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Abstract

The invention discloses an electric enhanced internal circulation anaerobic reactor and a method thereof, and belongs to the field of wastewater treatment. According to the electric enhanced IC anaerobic reactor, an electrochemical unit is arranged in the reactor body, and through the combination of a three-dimensional electrode and an iron-carbon filler, toxic pollutants in wastewater are quicklyoxidized and degraded, so that the biodegradability of the wastewater is improved, the stable operation of the reactor is ensured, and the treatment effect is improved; furthermore, through the reduction effect of iron-carbon micro-electrolysis, the sludge in the reactor is continuously reduced and detoxified, and meanwhile, the generated ferrous iron and ferric iron assist the anaerobic sludge to form granules, so that the purpose of activating the sludge is achieved.

Application Domain

Water treatment parameter controlTreatment with anaerobic digestion processes +4

Technology Topic

PollutantCarbon filler +10

Image

  • Electric enhanced internal circulation anaerobic reactor and method thereof
  • Electric enhanced internal circulation anaerobic reactor and method thereof

Examples

  • Experimental program(3)

Example Embodiment

[0054] Example 1
[0055] The COD of a chemical wastewater after pretreatment is 1200-1400mg/L, BOD 5 It is 200-300mg/L, and the B/C ratio is about 0.2.
[0056] An electric-enhanced internal circulation anaerobic reactor of this embodiment includes a reactor body 100. The reactor body 100 is provided with an electrochemical activation detoxification zone 110, a first anaerobic reaction zone 120, and a second anaerobic reaction zone. The reaction zone 130, the precipitation zone 140 and the internal circulation unit 150. The number of electrochemical cell 111 in the electrochemical activation detoxification zone 110 is one, the shell 1113 of the electrochemical cell 111 is a stainless steel mesh (with an accuracy of 100 microns), two graphite electrode plates are built in, and the cathode 1110 uses graphite electrodes. The anode 1111 adopts a graphite electrode, and the middle of the electrode plate is filled with an iron-carbon filler layer 1112 (wherein, the filler particle size in the iron-carbon filler layer is 4-6cm), and an alternating current is applied. The current density is J=3sint, where t is Time, the unit is h, J is the current density at time t, the unit is mA.
[0057] After this embodiment adopts an electrically enhanced internal circulation anaerobic reactor for wastewater treatment, the effluent COD≤650mg/L, BOD 5 ≤125mg/L, compared with the prior art, within the same total residence time, the COD removal rate of highly concentrated toxic wastewater is increased by 10%-20%.

Example Embodiment

[0058] Example 2
[0059] The basic content of this embodiment is the same as that of embodiment 1, except that the COD of a certain pharmaceutical wastewater after pretreatment is 13162mg/L, BOD 5 It is 3412mg/L, and the B/C ratio is about 0.27.
[0060] An electric-enhanced internal circulation anaerobic reactor of this embodiment includes a reactor body 100. The reactor body 100 is provided with an electrochemical activation detoxification zone 110, a first anaerobic reaction zone 120, and a second anaerobic reaction zone. The reaction zone 130, the precipitation zone 140 and the internal circulation unit 150. The number of electrochemical cells 111 in the electrochemical activation and detoxification zone 110 is 7. The shell 1113 of the electrochemical cell 111 is made of stainless steel mesh (with an accuracy of 500 microns), the cathode 1110 is made of stainless steel electrodes, and the anode 1111 is made of ruthenium, iridium and titanium electrodes. , The electrode plate is filled with iron-carbon filler layer 1112 (wherein, the filler particle size in the iron-carbon filler layer is 2-4cm), and alternating current is applied, the current density is J=2sin(t-π/6), where t is time, the unit is h, J is the current density at time t, the unit is mA.
[0061] In this embodiment, an electrically enhanced internal circulation anaerobic reactor is used for wastewater treatment, and the effluent COD≤3900mg/L, BOD 5 ≤1020mg/L, compared with the prior art, in the same total residence time, the COD removal rate of highly concentrated toxic wastewater is increased by 30%-40%.

Example Embodiment

[0062] Example 3
[0063] The basic content of this embodiment is the same as that of embodiment 1, except that the COD of a certain tannery wastewater after pretreatment is 2000mg/L, BOD 5 At 800mg/L, the B/C ratio is about 0.4.
[0064] An electric-enhanced internal circulation anaerobic reactor of this embodiment includes a reactor body 100. The reactor body 100 is provided with an electrochemical activation detoxification zone 110, a first anaerobic reaction zone 120, and a second anaerobic reaction zone. The reaction zone 130, the precipitation zone 140 and the internal circulation unit 150. The number of electrochemical cells 111 in the electrochemical activation and detoxification zone 110 is two, the shell 1113 of the electrochemical cell 111 is a stainless steel mesh (with an accuracy of 1000 microns), the cathode 1110 uses graphite electrodes, and the anode 1111 uses graphite electrodes. The plate is filled with iron-carbon filler layer 1112 (wherein, the filler particle size in the iron-carbon filler layer is 1-4cm), and an alternating current is applied. The current density is J=3sint, where t is time, and the unit is h, J Is the current density at time t in mA.
[0065] After using an electrically enhanced internal circulation anaerobic reactor for wastewater treatment in this embodiment, the effluent COD≤200mg/L, BOD 5 ≤80mg/L, compared with the prior art, in the same total residence time, the COD removal rate of high-concentration toxic wastewater is increased by 20%-30%.

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Description & Claims & Application Information

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