Resourceful treatment method of high-concentration phenol-containing wastewater

A treatment method and technology for phenolic wastewater, applied in water/sewage treatment, chemical instruments and methods, adsorbed water/sewage treatment, etc., can solve the problems of secondary pollution, high energy consumption, unstable effluent effect, etc., and achieve effluent indicators Stable, high-yield effect

Pending Publication Date: 2020-04-14
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned treatment problems of phenol-containing wastewater and the defects of the prior art, in order to overcome the problems of high energy consumption, secondary pollution, and unstable effluent effect in the resource treatment process of phenol-co

Method used

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  • Resourceful treatment method of high-concentration phenol-containing wastewater
  • Resourceful treatment method of high-concentration phenol-containing wastewater
  • Resourceful treatment method of high-concentration phenol-containing wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Using a resource-based treatment method for high-concentration phenol-containing wastewater to treat phenol-containing wastewater from a pesticide factory, the treatment process is as follows figure 1 shown, including the following steps:

[0035] Step 1, refining and impurity removal: adjust the pH of 8 tons of waste water to 3 with the reclaimed hydrochloric acid of mass concentration 30%, the system separates out a large amount of water-insoluble solids, add the nonionic polyacrylamide of 80kg (the mass concentration of nonionic polyacrylamide 2‰), 40kg of diatomite powder with a fineness of 300 mesh, flocculated and adsorbed for 1 hour and then filtered, the filtered water sample changed from red and black turbid to deep yellow and transparent;

[0036] Step 2, hydrogenation reduction: add 6.4kg of 5% palladium-carbon catalyst to the filtrate in step 1, stir and heat up to 40°C, feed hydrogen into the system at a rate of 5L / min, keep the hydrogen flowing for 2 hours...

Embodiment 2

[0047] Using a resource-based treatment method for high-concentration phenol-containing wastewater to treat phenol-containing wastewater from a pesticide factory, the treatment process is as follows figure 1 shown, including the following steps:

[0048] Step 1, refining and removing impurities, the difference from Example 1 is that the flocculation and adsorption time is changed from 1 hour to 10 hours, and the filtered water sample changes from red and black turbid to dark yellow and transparent;

[0049] Step 2, hydrogenation reduction: add 64kg5% palladium-carbon catalyst to the filtrate in step 1, stir and heat up to 120°C, feed hydrogen into the system at a rate of 20L / min, keep the hydrogen flowing for 9 hours, and remove the waste water P-benzoquinone is reduced to phenol, and the system changes from dark yellow transparent solution to light yellow to colorless solution;

[0050] Step 3, resin adsorption phenol:

[0051] (3-1) Macroporous adsorption resin pretreatmen...

Embodiment 3

[0060] Using a resource-based treatment method for high-concentration phenol-containing wastewater to treat phenol-containing wastewater from a pesticide factory, the treatment process is as follows figure 1 shown, including the following steps:

[0061] Step 1, refining and impurity removal: adjust the pH of 8 tons of waste water to 3 with reclaimed hydrochloric acid with a mass concentration of 30%, and a large amount of water-insoluble solids are separated out in the system, and nonionic polyacrylamide (nonionic polyacrylamide) of waste water quality 80kg is added The mass concentration is 2‰), and the fineness of 40kg of waste water is 300 mesh diatomite powder, which is filtered after 4 hours of flocculation and adsorption. After filtration, the water sample changes from red and black turbidity to dark yellow and transparent;

[0062] Step 2, hydrogenation reduction: add 64kg of 5% palladium-carbon catalyst to the filtrate in step 1, stir and heat up to 70°C, feed hydroge...

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Abstract

The invention discloses a resourceful treatment method of high-concentration phenol-containing wastewater. The resourceful treatment method comprises the steps of refining and impurity removal, hydrogenation reduction, resin adsorption, adsorption effluent treatment and the like. Non-ionic polyacrylamide and diatomite powder are adopted for impurity removal, a catalyst used in the hydrogenation reduction process is a palladium-carbon catalyst, macroporous adsorption resin is adopted for phenol adsorption in the resin adsorption process, resin regeneration liquid is adopted for phenol recovery,and mother liquid can be recycled. The phenol in the sewage is recovered through hydrogenation reduction and resin adsorption, the yield of the obtained phenol product is high, the content is 99% orabove, and the phenol product can be directly used as a pesticide synthesis production raw material. A methanol aqueous solution is used as a resin regeneration solution, the methanol recovery rate reaches 98%, all eluents in the regeneration process can be recycled, and no wastewater or waste residue is generated. According to the method, phenol in the sewage is recycled, meanwhile, no secondarypollution is caused, the effluent index is stable, biochemistry is not inhibited, and a harmless and resourceful treatment is carried out on the high-concentration phenol-containing wastewater.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to a resource treatment method for high-concentration phenol-containing wastewater. Background technique [0002] As an important chemical raw material and intermediate, phenolic compounds are widely used in the production process of pesticides. Phenolic compounds have a stable benzene ring structure, are not easy to degrade, and are easily oxidized to produce red quinones, so their wastewater is difficult to treat. The phenolic wastewater produced in the pesticide industry has the characteristics of complex composition, high content of phenolic compounds, and poor biodegradability. Phenolic compounds can coagulate proteins and are toxic to almost all organisms. Long-term exposure to high-concentration steam or drinking water polluted by phenols can cause chronic accumulation of poisoning, causing cancer, mutation and distortion effects on the human body. It is one of the toxic and har...

Claims

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Application Information

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IPC IPC(8): C02F9/14C07C37/07C07C37/68C07C39/08C02F1/70C02F1/28C02F101/34
CPCC02F1/28C02F1/281C02F1/56C02F1/66C02F1/70C02F9/00C02F2101/345C02F2303/16C07C37/07C07C37/68C07C39/08
Inventor 季民王帅帅
Owner TIANJIN UNIV
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