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Medicament and process for treating inorganic and organic complex wastewater through ozone photocatalysis

A technology for treating chemicals and photocatalysis, which is applied in the fields of oxidized water/sewage treatment, special compound water treatment, light water/sewage treatment, etc. The effect of reducing the amount of solid slag and reducing the COD of wastewater

Pending Publication Date: 2022-05-03
湖南天童环保有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] From the above examples, it can be seen that their components are complex, the wastewater treatment is difficult, and the waste slag produced becomes waste salt mixture and waste organic mixture. As solid waste and hazardous waste, it brings troubles in management, transfer, and treatment, and there is a risk of secondary pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] For wastewater from a pharmaceutical factory, raw water COD75000mg / L, wastewater organic matter TOC18000mg / L, take 100 liters of wastewater, add 5 kg of calcium oxide, stir for 20 minutes, add 0.5 kg of dimercaptopropanol, stir for 30 minutes, mechanically filter, and filter residues are treated separately , the filtrate is introduced into the first ozone reaction tower, the ozone concentration is 10g / m³, the flow rate is 0.01m³ / hour, and then introduced with MnO 2 -TiO 2 The ultraviolet light irradiation tower of the catalyst, after flowing out, add 0.1 kg of polyferric sulfate and 0.01 kg of polyacrylic acid to the waste water, stir and stay for 10 minutes, filter the effluent, and then enter the biochemical system, and detect the clean water, of which COD is 98 mg / L, NH 3 -N is 15 mg / L. The detections of heavy metals Pb, Cd, Hg, As, and Cr were all lower than the comprehensive sewage discharge standard GB8978-2017, meeting the requirements of the discharge standard....

Embodiment 2

[0025] For wastewater from a chemical plant, the raw water COD is 15000mg / L, the chroma is 150 times, the ammonia nitrogen is 200mg / L, and the pH value is 8. Take 100 liters of wastewater, add 3 kg of calcium oxide, 2 kg of sodium hydroxide, stir for 20 minutes, add 0.1 kg of 4-methyl-dimercaptobutane disodium, stir for 30 minutes, mechanically filter, filter residues are treated separately, and the filtrate is introduced into the first Ozone reaction tower, the ozone concentration is 8g / m³, the flow rate is 0.2m³ / hour, and then introduced with Zn-CuO-TiO 2 Catalyst 1 kg of ultraviolet light irradiation tower, after flowing out, add 0.1 kg of polyferric silicon aluminum sulfate, 0.01 kg of B-cyclodextrin to the wastewater, stir and stay for 15 minutes, filter the effluent, and then enter the biochemical system, clean water detection, of which COD is 87mg / L, NH 3 -N is 13mg / L, heavy metals Pb, Cd, Hg, As, and Cr are all lower than the comprehensive sewage discharge standard GB...

Embodiment 3

[0027] For the pickling-galvanizing wastewater of a certain factory, the raw water pH is 6.1, COD4470mg / L, suspended matter 64mg / L, total zinc 490mg / L, total iron 580mg / L, take 100 liters of wastewater, add 4 kg of calcium hydroxide, stir for 20 minutes, add 0.3 kg of 5-dodecyl salicylaldoxime, stir for 30 minutes, mechanically filter, filter residues are treated separately, the filtrate is introduced into the first ozone reaction tower, the ozone concentration is 9g / m³, and the flow rate is 0.5m³ / hour, and then introduced into the device With B-cyclodextrin-TiO 2 Catalyst 2 kg of ultraviolet light irradiation tower, after flowing out, add 0.05 kg of polyferric aluminum sulfate and 0.02 kg of polyacrylic acid to the waste water, stir and stay for 10 minutes, filter the effluent, and detect the clear water, of which COD is 92mg / L, heavy metals Pb, Cd , Hg, As, and Cr are all lower than the comprehensive sewage discharge standard GB8978-2017, the total zinc is 3mg / L, and the tot...

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Abstract

The invention discloses an ozone and photocatalysis treatment agent and process for treating inorganic and organic complex wastewater, and the ozone and photocatalysis treatment agent and process are mainly completed by adding agents in the following process: firstly, adding A-type agents such as alkaline substances into the wastewater to adjust the acid-base property and B-type agents to remove metals, filtering, introducing ozone into supernate for 0.5-24 hours, then introducing into a container filled with ultraviolet light and a catalyst C, and adding polymeric iron and other agents D into effluent. After filtration, clear liquid is treated reclaimed water, and the clear liquid can be directly discharged or recycled after reaching the standard through detection. The composite process can be used for treating inorganic and organic complex wastewater which is high in organic matter content or contains oil and is difficult to degrade, such as printing and dyeing wastewater, pharmaceutical wastewater, urban sewage, pesticide wastewater, food wastewater, landfill leachate, aquaculture wastewater, petroleum wastewater, petrochemical wastewater, coking wastewater and the like.

Description

technical field [0001] The invention relates to a medicament and a process for treating organic wastewater, belonging to the field of environmental protection. Background technique [0002] In the process of hydrometallurgy, chemical industry, pharmaceutical, printing and dyeing, pesticide, food, breeding, petrochemical production and processing, inorganic and organic wastewater will be produced. They contain not only metal and heavy metal components, but also small molecule organic solvents, organic additives, chelating agents, High-molecular compounds, wastewater often contains metals, heavy metal ions, ammonia nitrogen, phosphorus, and carbon-hydrogen compounds, resulting in high COD. Before discharge, environmental protection treatment must be carried out, such as physical methods, chemical methods, physical-chemical methods, biological methods, etc. , but due to the limitations of their methods, the process is often lengthy, complicated, and equipped with a lot of equip...

Claims

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Application Information

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IPC IPC(8): C02F9/08C02F1/78C02F1/32C02F1/56C02F1/54C02F101/16C02F101/20C02F101/22
CPCC02F9/00C02F1/78C02F1/32C02F1/725C02F1/56C02F1/54C02F2305/10C02F2209/08C02F2101/20C02F2101/16C02F2101/22C02F1/66C02F1/001C02F2001/007
Inventor 肖国光谢芳立韩琳刘慧珍徐中海
Owner 湖南天童环保有限公司
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