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A method for electrolytic oxidation pretreatment of vitamin C wastewater

An electrolytic oxidation and vitamin technology, applied in biological water/sewage treatment, oxidized water/sewage treatment, natural water treatment, etc. Salt amount, easy disassembly, and the effect of expanding the contact area

Active Publication Date: 2020-09-29
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of the above technical problems, the present invention provides a method for electrolytic oxidation pretreatment of vitamin C wastewater, which solves the problem that vitamin C wastewater still has high chroma, high salt content, and complex components after secondary biochemical treatment

Method used

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  • A method for electrolytic oxidation pretreatment of vitamin C wastewater
  • A method for electrolytic oxidation pretreatment of vitamin C wastewater
  • A method for electrolytic oxidation pretreatment of vitamin C wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for electrolytic oxidation pretreatment of vitamin C wastewater, comprising the following steps:

[0032] S1: Lead the vitamin C wastewater after the secondary biochemical treatment into the water storage tank, use the bubbler to aerate the water for 15 minutes, and the aeration flow rate is 40m / s, and divide it into 3 times through the atomizer Add low-foam activators in batches, the total dosage of low-foam activators is 8g / L, and use low-foam activators to activate the surface layer of organic matter in vitamin C wastewater to obtain primary activated wastewater; among them, the fog output of the atomizer The tube is connected to the air outlet pipe of the bubbler. The atomizer atomizes the low-foam activator and sends it into the air outlet pipe through the mist outlet pipe. The atomized low-foam activator is carried by the gas blown into the air outlet pipe. into the vitamin C wastewater, the flow rate ratio of the atomized low-foam activator to gas is 1:8...

Embodiment 2

[0044] This embodiment is basically the same as Embodiment 1, the difference lies in the following parts:

[0045] S2: After the bubbling aeration is completed, skim off the upper foam of the primary activated wastewater, and adjust the pH value to 7, then use the water pump to pump the primary activated wastewater to flow through the pulse neutron activator, the water flow rate is 1m / s, The pulse frequency of the pulsed neutron activator is 10KHZ, the distance between the neutron source and the water surface is 0.5m, and the neutron fluence rate is 1×10 13 n.cm -2 .s -1 , using neutron transfer energy to deeply activate the organic matter in the first-level activated wastewater to obtain the second-level activated wastewater;

[0046] S3: The secondary activated wastewater is directly introduced into the electrolytic oxidation reactor for electrolytic oxidation reaction, and three-dimensional electrode particles are added. The volume ratio of the three-dimensional electrode...

Embodiment 3

[0048] This embodiment is basically the same as Embodiment 1, the difference lies in the following parts:

[0049] S2: After the bubbling aeration is completed, skim off the upper foam of the first-level activated wastewater, and adjust the pH value to 10, and then use the water pump to pump the first-level activated wastewater to flow through the pulse neutron activator at a flow rate of 1m / s. The pulse frequency of the pulsed neutron activator is 10KHZ, the distance between the neutron source and the water surface is 0.5m, and the neutron fluence rate is 1×10 13 n.cm -2 .s -1 , using neutron transfer energy to deeply activate the organic matter in the first-level activated wastewater to obtain the second-level activated wastewater;

[0050] S3: The secondary activated wastewater is directly introduced into the electrolytic oxidation reactor for electrolytic oxidation reaction, and three-dimensional electrode particles are added. The volume ratio of the three-dimensional el...

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Abstract

The invention discloses a vitamin C wastewater electrolysis oxidation pretreatment method, and belongs to the technical field of wastewater treatment. Vitamin C wastewater is gradually degraded by three steps. Firstly, atomized low-foam activators contact with the vitamin C wastewater along with bubbles bubbled by a bubbling machine, so that contact area is enlarged, and surface activation of thevitamin C wastewater is facilitated. Secondly, the wastewater is subjected to neutron bombardment by a pulsed neutron activation device, energy is provided for organic matters in the wastewater, and internal electrons of the wastewater are jumped into an excited state. Thirdly, the wastewater activated by the first two steps is subjected to ultimate electrolysis oxidation by an electrolysis oxidation reactor. After graded activation, final electrolysis oxygenolysis efficiency can be greatly improved. In conclusion, the method is good in pretreatment effect and creates good conditions for subsequent biological enhancement processes.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a method for electrolytic oxidation pretreatment of vitamin C wastewater. Background technique [0002] Vitamin C (also known as L-ascorbic acid, referred to as VC), is a nutritional enhancer and functional antioxidant needed by human beings. It is currently the most widely used vitamin in the world, with the largest production and sales. It is widely used in medicine, food and beverage , feed and other industries, and it is also one of the varieties with the largest annual output and export volume of Chinese pharmaceutical companies. Since 1998, the export volume of vitamin C has increased year by year. In 21 years, the export volume reached 110,000 tons, accounting for more than 9% of the global demand, and most of the output came from 5 domestic pharmaceutical companies. China has become a veritable vitamin C producing country. [0003] Domestic VC p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/461C02F1/72C02F103/36
CPCC02F1/30C02F1/46114C02F1/4672C02F3/342C02F9/00C02F2001/46133C02F2103/36
Inventor 许柯任洪强耿金菊张徐祥黄辉
Owner NANJING UNIV
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