Advanced treatment method for Dioscoreazingiberensis C.H.Wright wastewater

A technology for advanced treatment and wastewater, applied in water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of no research reports, achieve high current efficiency, stable performance, and inhibit oxygen evolution The effect of side effects

Inactive Publication Date: 2010-10-20
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the BDD electrode electrochemical oxidation system has a good application prospect for the advanced treatment of turmeric wastewater, but there is no research report in this area so far.

Method used

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  • Advanced treatment method for Dioscoreazingiberensis C.H.Wright wastewater
  • Advanced treatment method for Dioscoreazingiberensis C.H.Wright wastewater
  • Advanced treatment method for Dioscoreazingiberensis C.H.Wright wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Using a 20×20mm BDD electrode as the anode, stainless steel of the same size as the cathode, and an electrode spacing of 10mm, electrochemical oxidation advanced treatment of turmeric wastewater biological effluent, COD is 281.8mg L -1 around, pH 7.75, add 0.1M Na 2 SO 4 supporting electrolyte with a current density of 10mA cm -2 、20mA cm -2 and 30mA cm -2 . Samples were taken from the reactor to analyze the COD value at regular intervals, and the experimental results are listed in Table 1. After 8 hours of electrolysis, the COD value of the turmeric wastewater biological effluent dropped to 105.8mg L respectively -1 , 76.7mg L -1 and 65.4mg L -1 . It can be seen that the current density is 30mA cm -2 , the processing effect is best.

[0030] Table 1 The change of COD in biological effluent of turmeric wastewater electrochemically oxidized by BDD electrode under different current densities

[0031]

Embodiment 2

[0033] Using a 20×20mm BDD electrode as the anode, stainless steel of the same size as the cathode, and an electrode spacing of 10mm, electrochemical oxidation advanced treatment of turmeric wastewater biological effluent, COD is 281.8mg L -1 Around, pH is 7.75, no supporting electrolyte or 0.1M Na 2 SO 4 and 0.1M Na 3 PO 4 Supporting electrolyte with a current density of 20mA cm -2 . Samples were taken from the reactor at regular intervals to analyze the COD value, and the experimental results are listed in Table 2. After 8 hours of electrolysis, the COD value of the turmeric wastewater biological effluent dropped to 166.7mg L -1 , 103.5mg L -1 and 76.7mg L -1 . It can be seen that adding 0.1MNa 2 SO 4 Supports electrolytes for best treatment.

[0034] Table 2 Changes of COD in biological effluent of turmeric wastewater electrochemically oxidized by BDD electrode under different supporting electrolytes

[0035]

Embodiment 3

[0037]Using a 20×20mm BDD electrode as the anode, stainless steel of the same size as the cathode, and an electrode spacing of 10mm, electrochemical oxidation advanced treatment of turmeric wastewater biological effluent, the COD is 281.8mg L -1 left and right, pH 3, 7.75 and 11, respectively, adding 0.1M Na 2 SO 4 Supporting electrolyte with a current density of 20mA cm -2 . Samples were taken from the reactor to analyze the COD value at intervals, and the experimental results are listed in Table 3. After 8 hours of electrolysis, the COD value of the turmeric wastewater biological effluent dropped to 100.5mg L respectively -1 , 76.7mg L -1 and 89.3mg L -1 . It can be seen that the treatment works best under neutral conditions.

[0038] Table 3 Changes of COD in biological effluent of turmeric wastewater electrochemically oxidized by BDD electrode at different pH values

[0039]

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PUM

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Abstract

The invention discloses an advanced treatment method for DIoscoreazingiberensis C.H.Wright wastewater, which takes a boron-doped diamond film BDD electrode as an anode and stainless steel as a cathode to perform an advanced treatment on biologically-treated dioscoreazingiberensis C.H.Wright wastewater via an electrochemical oxidation method, the biologically-treated dioscoreazingiberensis C.H.Wright wastewater is obtained from the process (disclosed in the patent with a patent publication number of CN1789171A) combining neutralization, hydrolysis acidification, desulfuration, methane fermentation, I-BAF-1 and I-BAF-2. The persistent organic pollutants in the biologically-treated dioscoreazingiberensis C.H.Wright wastewater can be effectively removed under the operation conditions of a current density of 30mA cm<-2>, a pH value of 7.75 and the addition of 0.1M supporting electrolyte Na2SO4. The COD content in the biologically-treated dioscoreazingiberensis C.H.Wright wastewater is reduced to 97.4mg/L from 281.8mg/L, meeting the national discharge standard of class I, and the energy consumption is 13.44kWhm <-3>. The method has the advantages of high oxidation capacity, excellent treatment effect, low energy consumption, low controllability and high potential in industrial application.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to a method for advanced treatment of yellow ginger waste water by electrochemical oxidation of a boron-doped diamond film BDD electrode. Background technique [0002] Turmeric (Dioscoreazingiberensis C.H.Wright, DZW) wastewater is a kind of high-concentration organic wastewater produced in the saponin production process with turmeric as raw material, which has the following characteristics: (1) poor biodegradability, BOD / COD=0.27; (2) High sugar content, about 2%, mainly reducing sugar; (3) High COD, the COD value of comprehensive wastewater is as high as 20000-30000mg L -1 ; (4) high acidity, pH value around 1.0; (5) high salinity, SO 4 2- The / COD value is as high as 0.5. Generally, the "anaerobic + aerobic" biological method is used to treat this kind of wastewater, but due to the above characteristics, it is difficult to treat it to meet the national discharg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461
Inventor 朱秀萍倪晋仁程鹏
Owner PEKING UNIV
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