CN103864265B - Combined treatment method of phenol-containing coal gas wastewater - Google Patents
Combined treatment method of phenol-containing coal gas wastewater Download PDFInfo
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- CN103864265B CN103864265B CN201410105756.2A CN201410105756A CN103864265B CN 103864265 B CN103864265 B CN 103864265B CN 201410105756 A CN201410105756 A CN 201410105756A CN 103864265 B CN103864265 B CN 103864265B
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Abstract
The invention discloses a combined treatment method of phenol-containing coal gas wastewater. The combined treatment method is characterized by comprising the following steps: (1), carrying out pre-aeration on phenol-containing wastewater by utilizing a pre-mixing process, wherein ozone dosage is 50mg/L-100mg/L, and the retention time is 5-10 minutes; (2), carrying out zone catalytic oxidization treatment on the phenol-containing coal gas wastewater by utilizing ozone, wherein the ozone dosage is 100-200mg/L, the pH is 8-10 and the retention time is 10-20 minutes; (3), adding the coal gas wastewater catalyzed and oxidized by ozone into a gyromagnetic dosing separating system, and adding aluminum-containing composite medicaments, a high polymer flocculating agent, and the like, wherein the medicament dosage is respectively 0.5%-5%, 0.001%-0.05%, the pH is 7.5-9 and the retention time is 30-60 minutes; (4), adding the wastewater of the gyromagnetic dosing separating system in an FT biological and chemical treatment process, wherein the retention time of the reaction treatment system is 15-30 ours, the gas-water ratio is controlled to (10:1)-(30:1), and the treated outlet water is exhausted or recycled after reaching standards.
Description
Technical field
The present invention relates to coal gas wastewater treatment technology, be specially a kind of containing phenol coal gas wastewater combination treatment method, process water outlet reaches zero release standard.
Background technology
Coal gas wastewater complicated components, Pollutant levels are high, the organism containing multiple bio-refractory, and at present, traditional biological treatment is still the core process of coal gas wastewater process, have that processing power is strong, influence factor is few and simple operation and other advantages.But because coal gas wastewater biodegradability is lower, biological treatment water outlet still has darker colourity, COD is difficult to up to standard, though advanced oxidation processes and other physico-chemical processeses can reach good treatment effect, but its running cost is high, complicated operation and have potential danger, makes these treatment technologies be difficult to solely use on a large scale.Therefore, select different treatment technique to combine rightly, optimizing operation cost, improve the usual way that processing efficiency is current coal gas wastewater process
Summary of the invention
One of the present invention increases premix as pretreatment technology containing phenol coal gas wastewater combination treatment method in original tradition " ozone+biological contact oxidation process " treatment process " ozone " front end, improves ozone utilization rate; Increase gyromagnet dosing separation system in " ozone+biochemistry " middle-end, improve subsequent biochemical effect, reduce water outlet COD, make it reach discharge or reuse requirement.
The present invention is a kind of containing phenol coal gas wastewater combination treatment method, it is characterized in that:
Processing step comprises:
1) premixing process: first waste water enters pre-mixing apparatus, pass through packing layer, adopt the operation scheme of air water reversed flow, object is that waste water is fully contacted with gas by packing layer, increase effective reaction time, water outlet enters catalytic ozonation treatment system, and ozone dosage is 50 ~ 100mg/L, 5 ~ 10 minutes residence time;
Waste water COD 200 ~ 300mg/L after pretreatment described in this step, B/C0.1 ~ 0.2, phenol 20 ~ 100mg/L;
2) catalytic ozonation technique: premix water outlet enters catalytic ozonation treatment system, for improving ozone utilization rate, adopt the reaction formation that air inlet is in the same way intake, and this step and premixing process ozone residual air are recycled to former water jointly store pond, the dosage of ozone is 100 ~ 200mg/L, pH8 ~ 10,10 ~ 20 minutes residence time;
Waste water COD 180 ~ 250mg/L described in this step after ozone oxidation, B/C0.3 ~ 0.5, phenol 10 ~ 50mg/L;
3) gyromagnet dosing separating technology: ozone water outlet enters gyromagnet dosing separating reaction device, carry out the process of sufficient dosing composite liberation, this process adds containing aluminium compound and polymeric flocculant class medicament, added amount of chemical is respectively 0.5% ~ 5%, 0.001% ~ 0.05%, pH7.5 ~ 9,30 ~ 60 minutes residence time;
Through the waste water COD 100 ~ 180mg/L of highly effective coagulation process described in this step, B/C0.3 ~ 0.5, pH7.5 ~ 9;
4) biochemical process: highly effective coagulation water outlet enters FT biochemical processing process, when the filler that wastewater streams is arranged through reaction zone, fully contact with the microbial film be attached on filler, there is provided oxygen to play stirring action to aeration in pond simultaneously, the residence time of reaction treatment system is 15 ~ 30 hours, and gas-water ratio controls at 10:1 ~ 30:1;
Biochemical process water outlet COD40 ~ 60mg/L described in this step, can reach the index of discharge or reuse completely.
According to combination treatment method of the present invention, it is characterized in that, comprise following operation steps:
1) premix process:
Utilize drop ozone to process further carrying out preaeration containing phenol coal gas wastewater, ozone dosage is 60 ~ 80mg/L, 6 ~ 9 minutes residence time;
2) catalytic ozonation process:
Utilize ozone to process further carrying out catalytic ozonation containing phenol coal gas wastewater, the dosage of ozone is 150 ~ 180mg/L, pH9 ~ 10,15 ~ 18 minutes residence time;
3) gyromagnet dosing separation system:
This process adds containing aluminium compound and polymeric flocculant class medicament, and added amount of chemical is respectively 1.5% ~ 3.0%, 0.005% ~ 0.02%, pH8 ~ 9,35 ~ 45 minutes residence time;
4) FT biological respinse process: enter FT bio-reaction system through highly effective coagulation water outlet, the residence time of reaction treatment system is 16 ~ 28 hours; Gas-water ratio controls at 12:1 ~ 28:1;
According to combination treatment method of the present invention, it is characterized in that, comprise following operation steps:
1) premix process:
Utilize drop ozone to carry out preaeration advanced treatment to containing phenol coal gas wastewater, finally determine that ozone dosage is 69mg/L, 8 minutes residence time;
2) catalytic ozonation process:
Utilize ozone to carry out catalytic ozonation advanced treatment to containing phenol coal gas wastewater, finally determine that the dosage of ozone is 165mg/L, pH9,16 minutes residence time;
3) gyromagnet dosing separation system:
It is PAFS that this system adds containing aluminium compound, and polymeric flocculant main component is polyacrylamide; Added amount of chemical is respectively 1.8% ~ 2.8%, 0.008% ~ 0.018%, pH8 ~ 9,38 ~ 42 minutes residence time;
4) FT biological respinse process: enter FT bio-reaction system through highly effective coagulation water outlet, the residence time of reaction treatment system is 18 ~ 24 hours; Gas-water ratio controls at 16:1 ~ 24:1.
The present invention has the following advantages:
(1) ozone front end increases premixing tower aeration system, utilizes air water reversed flow operation scheme, by multi-pore channel catalyst filling layer, not only increases effective contact area of air water two, also improve ozone utilization rate.
(2) catalytic ozonation technique, utilizes the enrichment of larger molecular organics in catalyzer duct in waste water, not only increases catalytic oxidation speed, also the loop chain of hardly degraded organic substance can be opened, and effectively improves its follow-up biochemical of waste water.(3) the gyromagnet dosing separating step in " ozone+biochemistry " stage casing, make catalytic ozonation go out water pollutant to be removed, enhance technological effect, improve organic overall clearance, and provide cost savings relative to simple catalytic oxidation technique, and alleviate the load of biochemical treatment, ensure that stable effluent quality.
(4) biological treatment adopts FT technique, the i.e. catalytic oxidation technique of combining with active sludge, this technique gives full play to the acting in conjunction of the attached microbial of contact oxidation technology and the suspension microorganism of activated sludge process, in pond, sludge concentration is higher, and oxygen transmission rate is high can organism in fully effective degrading waste water.
Ozone front end adds premixing process, and the ozone tail gas of pre-treatment, catalytic ozonation process is recycled to former water storage pond, improves ozone utilization rate; Reaction back segment adds gyromagnet dosing separating technology, alleviates the load of biological treatment, and the efficient combination of this technique ensure that process effluent quality meets the processing requirements of reuse or discharge.
Accompanying drawing explanation
Fig. 1 is a kind of process unit containing phenol coal gas wastewater combination treatment method of the present invention and schematic flow sheet;
1 former water retention basin; 2 pre-hybrid systems; 3 catalytic oxidation systems; 4 flocculation reaction systems; 5FT bio-reaction system; 6 ozonizers; 7 residual air; 8 on-line checkingi devices; 9 water outlets; 10 air.
Embodiment
Below in conjunction with accompanying drawing, by related example, elaboration detailed is further done to the present invention.
Embodiment 1
Process containing phenol coal gas wastewater certain by flow process of the present invention, reaction conditions is as follows: first waste water enters pre-mixing apparatus, ozone dosage 69mg/L, 8 minutes residence time; Premix water outlet enters catalytic ozonation treatment system, ozone dosage 165mg/L, pH9,16 minutes residence time; Water outlet is through gyromagnet dosing separating technology, and adding containing aluminium compound is PAFS, and polymeric flocculant main component is polyacrylamide; Added amount of chemical is respectively 1.8%, 0.008%, pH8,40 minutes residence time; Agent-feeding treatment water outlet enters biological treatment system, and gas-water ratio is 16:1, residence time 20hr.The indexs such as the rear COD of process reach the requirement of discharge or reuse, in table 1:
Embodiment 2
Process containing phenol coal gas wastewater certain by flow process of the present invention, reaction conditions is as follows: first waste water enters pre-mixing apparatus, ozone dosage 50mg/L, 8 minutes premix reaction times; Premix water outlet enters catalytic ozonation treatment system, ozone dosage 100mg/L, 15 minutes reaction times; Water outlet, through gyromagnet dosing separating technology, adds containing aluminium compound 2.0%, polymeric flocculant 0.01% etc., 30 minutes residence time; Agent-feeding treatment water outlet enters biological treatment system, and gas-water ratio is 20:1, residence time 26hr.The indexs such as the rear COD of process reach the requirement of discharge or reuse, in table 2:
Embodiment 3
Process containing phenol coal gas wastewater certain by flow process of the present invention, reaction conditions is as follows: first waste water enters pre-mixing apparatus, ozone dosage 80mg/L, 10 minutes reaction times; Premix water outlet enters catalytic ozonation treatment system, ozone dosage 180mg/L, 12 minutes reaction times; Water outlet, through gyromagnet dosing separating technology, adds containing aluminium compound 1.2%, polymeric flocculant 0.002% etc., 60 minutes residence time; Agent-feeding treatment water outlet enters biological treatment system, and gas-water ratio is 25:1, residence time 18hr.The indexs such as the rear COD of process reach the requirement of discharge or reuse, in table 3:
Claims (3)
1., containing a phenol coal gas wastewater combination treatment method, it is characterized in that:
Processing step comprises:
1) premixing process: first waste water enters pre-mixing apparatus, pass through packing layer, adopt the operation scheme of air water reversed flow, object is that waste water is fully contacted with gas by packing layer, increase effective reaction time, water outlet enters catalytic ozonation treatment system, and ozone dosage is 50 ~ 100mg/L, 5 ~ 10 minutes residence time;
Waste water COD 200 ~ 300mg/L, B/C 0.1 ~ 0.2 after pretreatment, phenol 20 ~ 100mg/L described in this step;
2) catalytic ozonation technique: premix water outlet enters catalytic ozonation treatment system, for improving ozone utilization rate, adopt the reaction formation that air inlet is in the same way intake, and this step and premixing process ozone residual air are recycled to former water jointly store pond, the dosage of ozone is 100 ~ 200mg/L, pH 8 ~ 10,10 ~ 20 minutes residence time;
Waste water COD 180 ~ 250mg/L described in this step after ozone oxidation, B/C 0.3 ~ 0.5, phenol 10 ~ 50mg/L;
3) gyromagnet dosing separating technology: ozone water outlet enters gyromagnet dosing separating reaction device, carry out the process of sufficient dosing composite liberation, this process adds containing aluminium compound and polymeric flocculant class medicament, added amount of chemical is respectively 0.5% ~ 5%, 0.001% ~ 0.05%, pH 7.5 ~ 9,30 ~ 60 minutes residence time;
Through the waste water COD 100 ~ 180mg/L of highly effective coagulation process, B/C 0.3 ~ 0.5, pH7.5 ~ 9 described in this step;
4) biochemical process: highly effective coagulation water outlet enters FT biochemical processing process, when the filler that wastewater streams is arranged through reaction zone, fully contact with the microbial film be attached on filler, there is provided oxygen to play stirring action to aeration in pond simultaneously, the residence time of reaction treatment system is 15 ~ 30 hours, and gas-water ratio controls at 10:1 ~ 30:1; Described FT biochemical processing process is the biochemical processing process that catalytic oxidation is combined with active sludge.
2. according to combination treatment method according to claim 1, it is characterized in that, comprise following operation steps:
1) premix process:
Utilize drop ozone to process further carrying out preaeration containing phenol coal gas wastewater, ozone dosage is 60 ~ 80mg/L, 6 ~ 9 minutes residence time;
2) catalytic ozonation process:
Utilize ozone to process further carrying out catalytic ozonation containing phenol coal gas wastewater, the dosage of ozone is 150 ~ 180mg/L, pH 9 ~ 10,15 ~ 18 minutes residence time;
3) gyromagnet dosing separation system:
This process adds containing aluminium compound and polymeric flocculant class medicament, and added amount of chemical is respectively 1.5% ~ 3.0%, 0.005% ~ 0.02%, pH 8 ~ 9,35 ~ 45 minutes residence time;
4) FT biological respinse process: enter FT bio-reaction system through highly effective coagulation water outlet, the residence time of reaction treatment system is 16 ~ 28 hours; Gas-water ratio controls at 12:1 ~ 28:1.
3. according to combination treatment method according to claim 1, it is characterized in that, comprise following operation steps:
1) premix process:
Utilize drop ozone to carry out preaeration advanced treatment to containing phenol coal gas wastewater, finally determine that ozone dosage is 69mg/L, 8 minutes residence time;
2) catalytic ozonation process:
Utilize ozone to carry out catalytic ozonation advanced treatment to containing phenol coal gas wastewater, finally determine that the dosage of ozone is 165mg/L, pH 9,16 minutes residence time;
3) gyromagnet dosing separation system:
It is PAFS that this system adds containing aluminium compound, and polymeric flocculant main component is polyacrylamide; Added amount of chemical is respectively 1.8% ~ 2.8%, 0.008% ~ 0.018%, pH 8 ~ 9,38 ~ 42 minutes residence time;
4) FT biological respinse process: enter FT bio-reaction system through highly effective coagulation water outlet, the residence time of reaction treatment system is 18 ~ 24 hours; Gas-water ratio controls at 16:1 ~ 24:1.
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| CN115259543B (en) * | 2022-06-17 | 2023-12-29 | 北京北方节能环保有限公司 | Treatment method of high-chlorine high-nitrate aniline wastewater |
| CN115353256B (en) * | 2022-08-22 | 2024-04-16 | 山东华城工程技术有限公司 | Water purification treatment process for micro-polluted surface water source water |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4755296A (en) * | 1985-03-21 | 1988-07-05 | Occidental Chemical Corporation | Integrated biological-adsorption process for treating waste water |
| CN101643300A (en) * | 2009-09-01 | 2010-02-10 | 浙江大学 | Treatment method of comprehensive waste water of metal processing |
| CN102897953A (en) * | 2012-11-12 | 2013-01-30 | 中国海洋石油总公司 | Integrated deep treatment method of polyformaldehyde wastewater |
| CN102923913A (en) * | 2012-11-09 | 2013-02-13 | 中国海洋石油总公司 | Combined treatment method of oil-refining wastewater containing naphthenic acid |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4755296A (en) * | 1985-03-21 | 1988-07-05 | Occidental Chemical Corporation | Integrated biological-adsorption process for treating waste water |
| CN101643300A (en) * | 2009-09-01 | 2010-02-10 | 浙江大学 | Treatment method of comprehensive waste water of metal processing |
| CN102923913A (en) * | 2012-11-09 | 2013-02-13 | 中国海洋石油总公司 | Combined treatment method of oil-refining wastewater containing naphthenic acid |
| CN102897953A (en) * | 2012-11-12 | 2013-01-30 | 中国海洋石油总公司 | Integrated deep treatment method of polyformaldehyde wastewater |
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