CN105152471A - Combined treatment process for non-biodegradable organic wastewater - Google Patents
Combined treatment process for non-biodegradable organic wastewater Download PDFInfo
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- CN105152471A CN105152471A CN201510539075.1A CN201510539075A CN105152471A CN 105152471 A CN105152471 A CN 105152471A CN 201510539075 A CN201510539075 A CN 201510539075A CN 105152471 A CN105152471 A CN 105152471A
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Abstract
The invention discloses a combined treatment process for non-biodegradable organic wastewater. The combined treatment process includes: removing suspended substances in water via a coagulation precipitation process; performing efficient muddy water separation via a coarse filtering process; subjecting the wastewater to treatment on the basis of combined action of electrochemistry, oxidation-reduction, physical absorption and flocculent precipitation by the aid of the iron-copper and iron-carbon galvanic cell principle, degrading organic pollutants and improving biodegradability of the wastewater; finally degrading organics into carbon dioxide and water via the anaerobic-aerobic biochemical reaction process; further filtering the suspended substances via the fine filtration process to enable the produced water to reach the wastewater discharge standard. Double electrolytic reaction is applied, so that organics removal effect is higher, biodegradability of the wastewater is further improved, and the combined treatment process has the advantages of being good in treatment effect, low in operation cost, convenient to operate and maintain and the like.
Description
Technical field
The present invention relates to a kind of waste water treatment process, especially a kind of combined treatment process of organic wastewater with difficult degradation thereby.
Background technology
Organic wastewater with difficult degradation thereby mainly refers to dyeing waste water, coking chemical waste water, pharmacy waste water etc., is characterized in that organic contamination substrate concentration is high, colourity is large, salinity is high, and containing the objectionable impurities such as heavy metal and polycyclic aromatic hydrocarbons, biodegradability is poor.General dyeing waste water pH is 6 ~ 13, and colourity is up to 1000 times, and COD is 400 ~ 4000mg/L.According to biochemical or other these type of sewage of single technology process, not only cost is large economically, and also difficulty reaches good treatment effect simultaneously.
For Processing Technology Research and the engineering practice of organic wastewater with difficult degradation thereby, can find mainly there is following problem: the efficiency of (1) ordinary method process waste water is not high, some toxic compound is difficult to remove, and water outlet really can not reach emission standard; (2) some special process or facility investment are comparatively large, and the cost of process waste water is higher, is difficult to apply; (3) system is comparatively complicated, and operation requires higher, and stability is to be improved.
Micro-electrolysis method is the technique utilizing Principles of Metal Erosion formation galvanic cell to process waste water, also known as internal electrolysis, core-loss shape etc.In recent years, the method is widely used in the process of printing and dyeing, heavy metal, pharmacy, oil field waste, has the advantage that use range is wide, technique is simple, treatment effect is good, and the process for high salinity, high COD, high-colour intensity wastewater has clear superiority.
The micro-electrolysis material that weak electrolysis mechanism adopts traditionally is generally iron filings and charcoal, soda acid activation will be added before using, be easy to passivation in the process used harden, again because iron and charcoal are physical contacts, between be easy to formed sealing coat, light electrolysis can not be proceeded and ineffective, which results in and change micro-electrolysis material continually, not only the large cost height of workload also affects treatment effect and the efficiency of waste water.In addition, traditional micro-electrolysis material surface-area is too little also makes wastewater treatment need long time, and add a ton water cost of investment, this has all had a strong impact on utilization and the popularization of weak electrolysis mechanism.
Summary of the invention
Problem to be solved by this invention is to provide a kind of combined treatment process of organic wastewater with difficult degradation thereby, has the advantages such as treatment effect is good, working cost is low, convenient operating maintenance.
In order to solve above technical problem, the technical solution adopted in the present invention is: a kind of combined treatment process of organic wastewater with difficult degradation thereby, comprises the following steps:
(1) coagulating sedimentation: sewage enters settling tank, adds acid for adjusting pH to 6 ~ 7, then adds flocculation agent and makes coagulating sedimentation, and coarse filtration strainer sent into by supernatant liquor;
(2) coarse filtration is filtered: sewage multi-deck screen chimney filter in coarse filtration strainer filters, and after efficient mud-water separation, water outlet enters next step operation;
(3) Inner electrolysis reaction: coarse filtration water outlet regulates pH to 2 ~ 5 after acid adding, send into two Inner electrolysis reactor again, the integrated filler of iron content copper carbon is filled with in two Inner electrolysis reactor, waste water utilizes the galvanic principles of iron/copper, iron-carbon in the reactor, acting in conjunction based on electrochemistry, oxidation-reduction, physical adsorption and flocculation sediment processes waste water, degradable organic pollutant, improves the biodegradability of waste water;
(4) anaerobism-facultative anaerobic biochemical reaction: after Inner electrolysis reaction, anaerobism-biological filter with oxygen is sent in water outlet successively, sewage enters anaerobic biofilter from bottom to top, mao bamboon filler is filled with in filter tank, the anerobe generation anaerobic reaction degradation of organic substances that sewage grows in mao bamboon filler, after reaction, waste water enters biological filter with oxygen from bottom to top, mao bamboon filler is loaded in biological filter with oxygen, aerating apparatus is provided with for micro-aeration below filler, the double further degradation of organic substances of oxygen biological bacteria generation series of biochemical reactions, finally resolves into carbonic acid gas and water;
(5) secondary filter: sewage sends into accurate filter after biochemical reaction, after filtering suspended substance further, produces water and reaches sewage drainage standard;
Coarse filtration strainer in described coarse filtration filtration step, comprise tank body and the end socket with tank body active link, tank base is provided with sewage draining exit, sidepiece is provided with water-in, end socket top is provided with water outlet and backwash mouth, many sleeve pipes screen pipe is provided with in tank body, described pipe screen pipe is by inner layer screen chimney filter, middle level screen pipe and outer screen pipe composition, inner layer screen chimney filter, the tank body of middle level screen pipe and outer screen pipe is grid type body, gap between grid or mesh and pore size filter, be maximum with the pore size filter of outer screen pipe, the pore size filter of inner layer screen chimney filter is minimum.
As preferably, the top of described pair of Inner electrolysis reactor is provided with back washing device, reactor bottom is provided with gas-washing device, described back washing device comprises the backwash mouth being located at reactor head and the backwash water distributor be connected with backwash mouth, and described gas-washing device comprises the air purge mouth being located at reactor side and the gas distribution pipe be connected with air purge mouth.
As preferably, the mao bamboon filler in described anaerobic biofilter is the Mao bamboo tube group that joint is got through in the peeling of vertically arrangement, and the mao bamboon filler in described biological filter with oxygen is bamboo plate.
As preferably, the hydraulic detention time in described anaerobic biofilter is 2 ~ 2.5h, and in described biological filter with oxygen, the loading capacity of bamboo plate is 70 ~ 80%, and bamboo plate particle diameter is 5 ~ 10mm, and aeration rate is 0.3 ~ 0.5mg/L.
The invention has the beneficial effects as follows:
1, the filler of iron content copper carbon is adopted in two Inner electrolysis reactor, form iron copper, the two kinds of Inner electrolysis reactions of iron carbon, there is, the feature such as wide accommodation, expense low, non-secondary pollution high to organic removal rate, the difficult problem fundamentally solve the easy passivation of common iron copper carbon mixed fillers, hardening and block.
2, this technique is used Inner electrolysis reaction Persistent organic pollutants in waste water can be reduced and is converted into easy degradable organic pollutant, improves the biodegradability of waste water, thus improves the efficiency of anaerobic-aerobic biochemical treatment.
3, coarse filtration strainer adopts many sleeve pipes screen pipe, former water is filtered through multi-gradient, makes efficient mud-water separation.
4, load mao bamboon filler in Characteristics of Anaerobic-aerobic Biological Filter, mao bamboon filler is good biological bacteria room, and biofilm is firm, and microbial film is not easy to come off; And mao bamboon cost is low, good stability.
5, this technique is applicable to process organic wastewater with difficult degradation thereby, as large in organic concentration, high toxicity, high chroma, difficult biochemical etc. waste water, the process of all types of industries waste water such as printing and dyeing, chemical industry, plating, pulping and paper-making, pharmacy, agricultural chemicals can be widely used in, applied widely.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Fig. 2 is the structural representation of coarse filtration strainer in the present invention.
Fig. 3 is the structural representation of screen pipe in coarse filtration strainer.
Fig. 4 is the structural representation of two Inner electrolysis reactor.
Fig. 5 is the structural representation of anaerobism-biological filter with oxygen.
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated.
Embodiment
As shown in Figure 1, a kind of combined treatment process of organic wastewater with difficult degradation thereby, comprises the following steps:
(1) coagulating sedimentation: sewage enters settling tank 1, through adding acid for adjusting pH to 6 ~ 7, adding flocculation agent and making coagulating sedimentation, and coarse filtration strainer 2 sent into by supernatant liquor;
(2) coarse filtration is filtered: sewage multi-deck screen chimney filter in coarse filtration strainer 2 filters, and after efficient mud-water separation, water outlet enters next step operation;
(3) Inner electrolysis reaction: coarse filtration water outlet regulates pH to 2 ~ 5 after acid adding, send into two Inner electrolysis reactor 3 again, the integrated filler 31 of iron content copper carbon is filled with in two Inner electrolysis reactor 3, waste water utilizes the galvanic principles of iron/copper, iron-carbon in the reactor, acting in conjunction based on electrochemistry, oxidation-reduction, physical adsorption and flocculation sediment processes waste water, degradable organic pollutant, improves the biodegradability of waste water;
(4) anaerobism-facultative anaerobic biochemical reaction: after Inner electrolysis reaction, anaerobism-biological filter with oxygen is sent in water outlet successively, sewage enters anaerobic biofilter 4 from bottom to top, as shown in Figure 5, mao bamboon filler 41 is filled with in anaerobic biofilter, mao bamboon filler 41 is the Mao bamboo tube group that joint is got through in the peeling vertically arranged, the anerobe generation anaerobic reaction degradation of organic substances that sewage grows in mao bamboon filler 41, hydraulic detention time is 2 ~ 2.5h, and after reaction, waste water enters biological filter with oxygen 5 from bottom to top; Load mao bamboon filler 51 in biological filter with oxygen 5, mao bamboon filler 51 is bamboo plate, and the loading capacity of bamboo plate is 80%, and bamboo plate particle diameter is 5 ~ 10mm, is provided with aerating apparatus 52 for micro-aeration below filler, and aeration rate is 0.3 ~ 0.5mg/L; The double further degradation of organic substances of oxygen biological bacteria generation series of biochemical reactions, finally resolves into carbonic acid gas and water;
(5) secondary filter: sewage sends into accurate filter 6 after biochemical reaction, after filtering suspended substance further, produces water and reaches sewage drainage standard.
As shown in accompanying drawing 2 and accompanying drawing 3, coarse filtration strainer 2 in coarse filtration filtration step, comprise tank body 21 and the end socket 22 with tank body active link, tank base is provided with sewage draining exit 23, sidepiece is provided with water-in 24, end socket top is provided with water outlet 25 and backwash mouth 26, many sleeve pipes screen pipe 27 is provided with in tank body 21, described pipe screen pipe is by inner layer screen chimney filter 271, middle level screen pipe 272 and outer screen pipe 273 form, inner layer screen chimney filter, the tank body of middle level screen pipe and outer screen pipe is grid type body, gap between grid or mesh and pore size filter, be maximum with the pore size filter of outer screen pipe 273, the pore size filter of inner layer screen chimney filter 271 is minimum.Wherein the bottom centre of middle level screen pipe 272 and outer screen pipe 273 is equipped with mudhole 274, after strainer runs for some time, filter resistance becomes large, aquifer yield diminishes, back flushing need be carried out to strainer, backwash water rinses the filter screen of each many sleeve pipes screen pipe from top to bottom, from inside to outside, and the mud under rinsing is discharged from strainer sewage draining exit 23.
As shown in Figure 4, the bottom of two Inner electrolysis reactor 3 is provided with water-in 32, top sidewall is provided with water outlet 33, top is provided with back washing device, reactor lower part is provided with gas-washing device, described back washing device comprises the backwash mouth 34 being located at reactor head and the backwash water distributor 35 be connected with backwash mouth, and described gas-washing device comprises the air purge mouth 36 being located at reactor side and the gas distribution pipe 37 be connected with air purge mouth.After reactor runs for some time, organism a large amount of in waste water is attached to filling surface, by gas, water associating back flushing, is taken out of by throw out outside reactor, makes filler retention preferably reaction effect.It is loosening that air purge makes packing layer produce, and makes the throw out of attachment more easily washed away, and reduce the back washing strength of water and the water yield of back flushing.
Waste water is stable effluent quality after treatment, reaches sewage drainage standard.
Claims (4)
1. a combined treatment process for organic wastewater with difficult degradation thereby, is characterized in that comprising the following steps:
(1) coagulating sedimentation: sewage enters settling tank, adds acid for adjusting pH to 6 ~ 7, then adds flocculation agent and makes coagulating sedimentation, and coarse filtration strainer sent into by supernatant liquor;
(2) coarse filtration is filtered: sewage multi-deck screen chimney filter in coarse filtration strainer filters, and after efficient mud-water separation, water outlet enters next step operation;
(3) Inner electrolysis reaction: coarse filtration water outlet regulates pH to 2 ~ 5 after acid adding, send into two Inner electrolysis reactor again, the integrated filler of iron content copper carbon is filled with in two Inner electrolysis reactor, waste water utilizes the galvanic principles of iron/copper, iron-carbon in the reactor, acting in conjunction based on electrochemistry, oxidation-reduction, physical adsorption and flocculation sediment processes waste water, degradable organic pollutant, improves the biodegradability of waste water;
(4) anaerobism-facultative anaerobic biochemical reaction: after Inner electrolysis reaction, anaerobism-biological filter with oxygen is sent in water outlet successively, sewage enters anaerobic biofilter from bottom to top, mao bamboon filler is filled with in filter tank, the anerobe generation anaerobic reaction degradation of organic substances that sewage grows in mao bamboon filler, after reaction, waste water enters biological filter with oxygen from bottom to top, mao bamboon filler is loaded in biological filter with oxygen, aerating apparatus is provided with for micro-aeration below filler, the double further degradation of organic substances of oxygen biological bacteria generation series of biochemical reactions, finally resolves into carbonic acid gas and water;
(5) secondary filter: sewage sends into accurate filter after biochemical reaction, after filtering suspended substance further, produces water and reaches sewage drainage standard;
Coarse filtration strainer in described coarse filtration filtration step, comprise tank body and the end socket with tank body active link, tank base is provided with sewage draining exit, sidepiece is provided with water-in, end socket top is provided with water outlet and backwash mouth, many sleeve pipes screen pipe is provided with in tank body, described pipe screen pipe is by inner layer screen chimney filter, middle level screen pipe and outer screen pipe composition, inner layer screen chimney filter, the tank body of middle level screen pipe and outer screen pipe is grid type body, gap between grid or mesh and pore size filter, be maximum with the pore size filter of outer screen pipe, the pore size filter of inner layer screen chimney filter is minimum.
2. the combined treatment process of a kind of organic wastewater with difficult degradation thereby according to claim 1, it is characterized in that: the top of described pair of Inner electrolysis reactor is provided with back washing device, reactor bottom is provided with gas-washing device, described back washing device comprises the backwash mouth being located at reactor head and the backwash water distributor be connected with backwash mouth, and described gas-washing device comprises the air purge mouth being located at reactor side and the gas distribution pipe be connected with air purge mouth.
3. the combined treatment process of a kind of organic wastewater with difficult degradation thereby according to claim 1 and 2, it is characterized in that: the mao bamboon filler in described anaerobic biofilter is the Mao bamboo tube group that joint is got through in the peeling vertically arranged, and the mao bamboon filler in described biological filter with oxygen is bamboo plate.
4. the combined treatment process of a kind of organic wastewater with difficult degradation thereby according to claim 1 or 2 or 3, it is characterized in that: the hydraulic detention time in described anaerobic biofilter is 2 ~ 2.5h, in described biological filter with oxygen, the loading capacity of bamboo plate is 70 ~ 80%, bamboo plate particle diameter is 5 ~ 10mm, and aeration rate is 0.3 ~ 0.5mg/L.
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| CN201510539075.1A CN105152471A (en) | 2015-08-29 | 2015-08-29 | Combined treatment process for non-biodegradable organic wastewater |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105481205A (en) * | 2016-01-29 | 2016-04-13 | 杭州萧索环保科技有限公司 | Printing and dyeing wastewater treatment process |
| CN106277483A (en) * | 2016-09-27 | 2017-01-04 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of fracturing outlet liquid processing method |
| CN111170528A (en) * | 2020-02-26 | 2020-05-19 | 江苏森茂能源发展有限公司 | Purification treatment method of organic wastewater with difficultly-degraded oil sludge |
| CN113480113A (en) * | 2021-09-06 | 2021-10-08 | 江苏通海染整有限公司 | Azo printing and dyeing wastewater treatment process |
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| CN101024534A (en) * | 2006-02-21 | 2007-08-29 | 中国科学院生态环境研究中心 | Biological electrochemical combined system for treating dye waste water and method thereof |
| CN101041531A (en) * | 2006-03-20 | 2007-09-26 | 刘景峰 | Multiple combined technique for high concentration hard-degraded organic waste water treatment |
| WO2011063769A1 (en) * | 2009-11-27 | 2011-06-03 | 波鹰(厦门)科技有限公司 | Purification device and method for advancedly treating printing and dyeing wastewater |
| CN103304110A (en) * | 2013-07-09 | 2013-09-18 | 华北制药康欣有限公司 | Wastewater treatment method in starch glucose production |
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2015
- 2015-08-29 CN CN201510539075.1A patent/CN105152471A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101024534A (en) * | 2006-02-21 | 2007-08-29 | 中国科学院生态环境研究中心 | Biological electrochemical combined system for treating dye waste water and method thereof |
| CN101041531A (en) * | 2006-03-20 | 2007-09-26 | 刘景峰 | Multiple combined technique for high concentration hard-degraded organic waste water treatment |
| WO2011063769A1 (en) * | 2009-11-27 | 2011-06-03 | 波鹰(厦门)科技有限公司 | Purification device and method for advancedly treating printing and dyeing wastewater |
| CN103304110A (en) * | 2013-07-09 | 2013-09-18 | 华北制药康欣有限公司 | Wastewater treatment method in starch glucose production |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105481205A (en) * | 2016-01-29 | 2016-04-13 | 杭州萧索环保科技有限公司 | Printing and dyeing wastewater treatment process |
| CN105481205B (en) * | 2016-01-29 | 2018-01-09 | 杭州萧索环保科技有限公司 | A kind of printing-dyeing waste water treatment process |
| CN106277483A (en) * | 2016-09-27 | 2017-01-04 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of fracturing outlet liquid processing method |
| CN111170528A (en) * | 2020-02-26 | 2020-05-19 | 江苏森茂能源发展有限公司 | Purification treatment method of organic wastewater with difficultly-degraded oil sludge |
| CN113480113A (en) * | 2021-09-06 | 2021-10-08 | 江苏通海染整有限公司 | Azo printing and dyeing wastewater treatment process |
| CN113480113B (en) * | 2021-09-06 | 2021-11-16 | 江苏通海染整有限公司 | Azo printing and dyeing wastewater treatment process |
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Application publication date: 20151216 |