Method and device for treating industrial phenol-containing wastewater

Abstract

The invention provides a method and a device for treating industrial phenol-containing wastewater, aiming at solving the problem that in the prior art, the high-concentration phenol-containing wastewater cannot reach discharge requirements after being subjected to biochemical treatment. The method for treating the wastewater comprises buffering, flocculating, carrying out physical absorption dephenolization, carrying out biochemical-chemical combined dephenolization, and carrying out anaerobic-aerobic-advanced oxidation-aerobic combined biochemical treatment. By adopting flocculation, physicalabsorption dephenolization and biochemical-chemical combined dephenolization, the phenol content and COD in the wastewater can be greatly reduced, and the problems that the growth of microorganisms is inhibited due to the direct entry of the high-concentration phenol-containing wastewater into the biochemical treatment, so that incomplete treatment is caused, COD removal efficiency is reduced, and the subsequent aerobic treatment is influenced can be solved; then, the anaerobic-aerobic-advanced oxidation-aerobic combined biochemical treatment is used for advanced treatment, so as to up-to-standard discharge is realized.

Description

technical field

[0001] The invention belongs to the field of industrial wastewater treatment, and in particular relates to a treatment method and device for industrial phenol-containing wastewater. Background technique

[0002] Refractory wastewater refers to wastewater that is difficult to be decomposed by microorganisms or decomposed slowly and incompletely. This type of wastewater usually contains heterocyclic compounds, organic phenolic compounds, surfactants, halogenated hydrocarbons, polycyclic aromatic hydrocarbons, organic dyes or For toxic and refractory organic pollutants such as organophosphorus pesticides, general microorganisms have almost no degradation effect on them, and the biodegradability of refractory wastewater is poor, making it difficult to remove macromolecular organic pollutants in wastewater by a single anaerobic fermentation process, resulting in subsequent good The oxygen treatment load is too high, and the discharge after treatment cannot meet th...

Examples

Embodiment 1

[0030] A treatment method for industrial phenolic waste water, comprising the following steps:

[0031] (1) Input the raw water into the adjustment tank for buffering. The COD in the raw water is 5000mg / L, the phenol content is 1300mg / L, the pH is 5.4, and the chromaticity is 1200 (times). Calcium, adjust the pH of the raw water in the flocculation tank to 10.7, put the composite flocculant into the flocculation tank, the dosage is 30mg of the composite flocculant per L of raw water, adjust the speed of the flocculation tank to 100r / min, stir for 20min, and let it stand for 20min Precipitating flocs, wherein the composite flocculant is prepared by uniformly mixing anionic polyacrylamide, polyaluminum ferric sulfate, potassium ferrate and diatomaceous earth with a mass ratio of 1:60:10:15;

[0032] (2) The supernatant of step (1) is imported in the phenol adsorption tower, and the chitosan magnetic microsphere that multi-layer is coated with ferric oxide is arranged in the phen...

Embodiment 2

[0040] A treatment method for industrial phenolic waste water, comprising the following steps:

[0041] (1) Input the raw water into the adjustment tank for buffering. The COD in the raw water is 4800mg / L, the phenol content is 1210mg / L, the pH is 5.4, and the chroma is 1000 (times). The raw water enters the flocculation tank, and calcium hydroxide is added to the flocculation tank , adjust the pH of the raw water in the flocculation tank to 10.0, put the composite flocculant into the flocculation tank, the dosage is 20mg of the composite flocculant per L of raw water, adjust the speed of the flocculation tank to 150r / min, stir for 20min, and settle after standing for 20min The floc, wherein the composite flocculant is uniformly prepared by mixing anionic polyacrylamide, polyaluminum ferric sulfate, potassium ferrate and diatomaceous earth with a mass ratio of 5:65:12:13;

[0042] (2) The supernatant of step (1) is imported in the phenol adsorption tower, and the chitosan magn...

Embodiment 3

[0050] A treatment method for industrial phenolic waste water, comprising the following steps:

[0051] (1) Input the raw water into the adjustment tank for buffering. The COD in the raw water is 4000mg / L, the phenol content is 1000mg / L, the pH is 5.6, and the chroma is 800 (times). The raw water enters the flocculation tank, and calcium hydroxide is added to the flocculation tank , adjust the pH of the raw water in the flocculation tank to 9.2, put the composite flocculant into the flocculation tank, the dosage is 20mg of the composite flocculant per L of raw water, adjust the speed of the flocculation tank to 120r / min, stir for 10min, and settle after standing for 20min The floc, wherein the composite flocculant is uniformly prepared by mixing anionic polyacrylamide, polyaluminum ferric sulfate, potassium ferrate and diatomaceous earth with a mass ratio of 2:60:15:15;

[0052] (2) The supernatant of step (1) is imported in the phenol adsorption tower, and the chitosan magnet...

technical field

[0001] The invention belongs to the field of industrial wastewater treatment, and in particular relates to a treatment method and device for industrial phenol-containing wastewater. Background technique

[0002] Refractory wastewater refers to wastewater that is difficult to be decomposed by microorganisms or decomposed slowly and incompletely. This type of wastewater usually contains heterocyclic compounds, organic phenolic compounds, surfactants, halogenated hydrocarbons, polycyclic aromatic hydrocarbons, organic dyes or For toxic and refractory organic pollutants such as organophosphorus pesticides, general microorganisms have almost no degradation effect on them, and the biodegradability of refractory wastewater is poor, making it difficult to remove macromolecular organic pollutants in wastewater by a single anaerobic fermentation process, resulting in subsequent good The oxygen treatment load is too high, and the discharge after treatment cannot meet th...

Examples

Embodiment 1

[0030] A treatment method for industrial phenolic waste water, comprising the following steps:

[0031] (1) Input the raw water into the adjustment tank for buffering. The COD in the raw water is 5000mg / L, the phenol content is 1300mg / L, the pH is 5.4, and the chromaticity is 1200 (times). Calcium, adjust the pH of the raw water in the flocculation tank to 10.7, put the composite flocculant into the flocculation tank, the dosage is 30mg of the composite flocculant per L of raw water, adjust the speed of the flocculation tank to 100r / min, stir for 20min, and let it stand for 20min Precipitating flocs, wherein the composite flocculant is prepared by uniformly mixing anionic polyacrylamide, polyaluminum ferric sulfate, potassium ferrate and diatomaceous earth with a mass ratio of 1:60:10:15;

[0032] (2) The supernatant of step (1) is imported in the phenol adsorption tower, and the chitosan magnetic microsphere that multi-layer is coated with ferric oxide is arranged in the phen...

Embodiment 2

[0040] A treatment method for industrial phenolic waste water, comprising the following steps:

[0041] (1) Input the raw water into the adjustment tank for buffering. The COD in the raw water is 4800mg / L, the phenol content is 1210mg / L, the pH is 5.4, and the chroma is 1000 (times). The raw water enters the flocculation tank, and calcium hydroxide is added to the flocculation tank , adjust the pH of the raw water in the flocculation tank to 10.0, put the composite flocculant into the flocculation tank, the dosage is 20mg of the composite flocculant per L of raw water, adjust the speed of the flocculation tank to 150r / min, stir for 20min, and settle after standing for 20min The floc, wherein the composite flocculant is uniformly prepared by mixing anionic polyacrylamide, polyaluminum ferric sulfate, potassium ferrate and diatomaceous earth with a mass ratio of 5:65:12:13;

[0042] (2) The supernatant of step (1) is imported in the phenol adsorption tower, and the chitosan magn...

Embodiment 3

[0050] A treatment method for industrial phenolic waste water, comprising the following steps:

[0051] (1) Input the raw water into the adjustment tank for buffering. The COD in the raw water is 4000mg / L, the phenol content is 1000mg / L, the pH is 5.6, and the chroma is 800 (times). The raw water enters the flocculation tank, and calcium hydroxide is added to the flocculation tank , adjust the pH of the raw water in the flocculation tank to 9.2, put the composite flocculant into the flocculation tank, the dosage is 20mg of the composite flocculant per L of raw water, adjust the speed of the flocculation tank to 120r / min, stir for 10min, and settle after standing for 20min The floc, wherein the composite flocculant is uniformly prepared by mixing anionic polyacrylamide, polyaluminum ferric sulfate, potassium ferrate and diatomaceous earth with a mass ratio of 2:60:15:15;

[0052] (2) The supernatant of step (1) is imported in the phenol adsorption tower, and the chitosan magnet...

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