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Process for electrochemically treating high-protein wastewater

An electrochemical, high-protein technology, applied in chemical instruments and methods, precipitation treatment, multi-stage water treatment, etc. Remarkable COD removal effect, outstanding oxidation effect, outstanding treatment effect

Inactive Publication Date: 2018-08-10
广东凯达环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The wastewater has high COD (up to 50,000 to 60,000), contains more ethanol, has antibacterial effect, and has a low B / C value, which is not conducive to biological treatment
[0003] Blood product wastewater treatment methods mainly include various biological treatment methods such as SBR process, AB process, CASS process, LINPOR process, UASB process, etc. Usually, high-protein wastewater is mixed with workshop equipment washing water, ground washing water, cooling water, Mixed treatment of office and domestic wastewater, some acid and alkali wastewater, and other wastewater with low pollution, which actually dilutes the pollution concentration, but this increases the treatment capacity and increases the load of biological treatment. The operation effect is not good, and it is difficult to achieve discharge standard and uneconomical

Method used

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  • Process for electrochemically treating high-protein wastewater
  • Process for electrochemically treating high-protein wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Pump the high-protein waste water into the pH adjustment tank for comparison test, the pH value is not adjusted, and the pH value is measured to be 7.00.

[0041] (2) Put the high-protein wastewater without adjusting the pH value in step (1) into the first-level electrochemical reaction tank (the reaction electrode is an iron electrode), set 10min. Automatic phase change (switch the positive and negative polarity of the electrode), and turn on the electric regulator Current density 5mA / cm 2 , reaction 20min..

[0042] (3) Pump the high-protein wastewater after the electrochemical reaction in step (2) into the aeration tank, and aerate for 30 minutes.

[0043] (4) Pump the high-protein wastewater after aeration in step (3) into the fast mixing tank and slow mixing tank (flocculation tank), without adjusting the pH value, the actual measurement is 7.30, add polyaluminum chloride (PAC) to stir, and then add anion Polyacrylamide (PAM) precipitated after stirring, and ...

Embodiment 2

[0045] (1) Pump high-protein wastewater into a pH adjustment tank, add sulfuric acid with a concentration of 20% to adjust the pH value, and measure the pH value to 3.01.

[0046] (2) Pump the high-protein wastewater after adjusting the pH value in step (1) into the first-level electrochemical reaction tank (the reaction electrode is an iron electrode), set 10min. Automatic phase change (switch the positive and negative polarity of the electrode), and turn on the electric regulator Current density 15mA / cm 2 , reaction 20min..

[0047] (3) Pump the high-protein wastewater after the electrochemical reaction in step (2) into the aeration tank, and aerate for 30 minutes.

[0048] (4) Pump the high-protein wastewater after aeration in step (3) into the fast mixing tank and slow mixing tank (flocculation tank), add alkali (NaOH) to stir, adjust the pH value to 8.67, add polyaluminum chloride (PAC) to stir , add anionic polyacrylamide (PAM) to stir and then precipitate, take the cl...

Embodiment 3

[0050] (1) The high-protein waste water after embodiment 2 step (3) aeration is pumped into fast mixing tank and slow mixing tank (flocculation tank), adds alkali (NaOH) and stirs, adjusts pH value 10.15, adds polyaluminum chloride ( PAC) was stirred, and anionic polyacrylamide (PAM) was added to precipitate after stirring, and the clear liquid was taken to obtain water sample 3, and the test is shown in Table 1.

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Abstract

The invention discloses a process for electrochemically treating high-protein wastewater. The process is characterized in that high-protein wastewater with a COD value of 50000-80000 mg / L and poor biodegradability is subjected to a treatment process using two-stage electrochemical advanced oxidation as the main so as to achieve oxidation, reduction, air floatation, flocculation and other actions,wherein the treatment process comprises: adding an acid to high-protein wastewater, adjusting the pH value, feeding into an electrochemical reactor, and carrying out oxidation, reduction, air floatation, flocculation and other comprehensive treatments, wherein the reaction time is 20-30 min; carrying out an aeration reaction for 20-30 min after the two-stage electrochemical treatment; and carryingout flocculation and precipitation treatment on the effluent, wherein the difficultly-degraded organic matter is degraded. According to the present invention, after the treatment through the processmethod, the COD removal rate can reach 40-60%, and the biochemical treatment or the membrane treatment can be further performed so as to meet the wastewater discharge standard or the reclaimed water reuse standard; and the process further has advantages of remarkable treatment effect, biochemical load reducing and easy biochemical treatment.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to treating high-protein wastewater by using an electrochemical process. Background technique [0002] The high-protein waste water involved in the present invention comes from the production of blood products, and produces human serum albumin and globulin. The final products, intermediate products and dissolved solvents, etc., the pollution indicators are COD, BOD, SS, ammonia nitrogen, etc. This high-protein wastewater is the main pollution source of blood products. The wastewater has high COD (up to 50,000 to 60,000), contains more ethanol, has antibacterial effect, and has a low B / C value, which is not conducive to biological treatment. [0003] Blood product wastewater treatment methods mainly include various biological treatment methods such as SBR process, AB process, CASS process, LINPOR process, UASB process, etc. Usually, high-protein wastewater is mixed with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06
CPCC02F1/24C02F1/4672C02F1/56C02F1/66C02F7/00C02F9/00C02F2001/007C02F2301/08
Inventor 李小春童小林阚凯
Owner 广东凯达环保科技有限公司
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