CN108439610A - A method of strengthening Cr (VI) biological wastewater treatment using sludge lysate - Google Patents
A method of strengthening Cr (VI) biological wastewater treatment using sludge lysate Download PDFInfo
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- CN108439610A CN108439610A CN201810255361.9A CN201810255361A CN108439610A CN 108439610 A CN108439610 A CN 108439610A CN 201810255361 A CN201810255361 A CN 201810255361A CN 108439610 A CN108439610 A CN 108439610A
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- sludge
- lysate
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Activated Sludge Processes (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention belongs to environmental project technical field of waste water processing, are related to a kind of method for strengthening Cr (VI) biological wastewater treatment using sludge lysate.Matrix of the sludge lysate prepared using excess sludge as microorganism growth metabolism, and it is added into the biological treatment process of chromate waste water, using organic matter and humic acid abundant in sludge lysate, the supplement of carbon source and the enhancing degradation of Cr (VI) in Cr (VI) biological treatment process are realized.The preparation process of sludge lysate is simple, at low cost, non-secondary pollution.The technical bottleneck that carbon source is insufficient in chromate waste water biological treatment process and treatment effeciency is low can effectively be overcome.New way is provided for the recycling and minimizing of excess sludge.
Description
Technical field
The invention belongs to environmental project technical field of waste water processing, are related to a kind of useless using sludge lysate reinforcing Cr (VI)
The method of aquatic organism processing.
Background technology
With the progress of social industry, the industries such as metallurgical, plating and process hides are rapidly developing, these industries are discharged useless
Include a large amount of chromium in water.Chromium mainly exists in the form of Cr VI and trivalent chromium in water, and wherein Cr VI has strong toxicity, is
Carcinogenic substance, teratogen and mutagens.Further, since Cr (VI) has high-dissolvability so that it has mobility and the life of height
Object activity, it is easier to be enriched in vivo, to threaten the life security of the mankind.And Cr (III) has lower toxicity,
And hydroxide precipitation is more easily formed to be removed from water.So Cr (VI), which is effectively reduced to Cr (III), is
The key of processing waste water containing chrome.The processing of chromate waste water has physics, chemistry and bioanalysis.Physical and chemical method are in certain journey
Shortcomings on degree, such as of high cost, secondary pollution, and to have that reaction is mild, low energy consumption, effect on environment is small etc. excellent for bioanalysis
Point.Therefore, bioanalysis is the one preferred technique of processing waste water containing chrome.
In current Cr (VI) biological treatment process, existing main problem is：The reduction of Cr VI needs organic
Carbon serves as electron donor, and chromate waste water is commonly present the situation of carbon source deficiency, needs additional carbon to ensure efficient biological treatment
Efficiency, but the costs such as common additional carbon such as methanol are higher and toxic, this serious biological reducing processing for hindering chromium
Efficiency.Main By product of the excess sludge as biological treatment, yield is big and processing cost is high, but abundant contained by its inside
Organic matter can then be used as the available carbon source of microorganism, while the degradation of pollutant can also be mediated.This can not only be dropped
The biological treatment cost of low Cr (VI), improves the biodegradable efficiency of Cr (VI), while the recycling of excess sludge may be implemented
It utilizes.
Invention content
The purpose of the present invention is being directed to, carbon source is insufficient in chromate waste water biological treatment process and the slow efficiency of degradation speed is low
Technical bottleneck, while realizing the recycling of excess sludge, a kind of the biological reinforced of economical and efficient provided for chromate waste water
Processing method.
Technical solution of the invention is the sludge lysate using excess sludge preparation as microorganism growth metabolism
Matrix, and be added into the biological treatment process of chromate waste water, utilize organic matter and humic abundant in sludge lysate
Acid realizes the supplement of carbon source and the enhancing degradation of Cr (VI) in Cr (VI) biological treatment process.
Technical scheme of the present invention：
A method of strengthening Cr (VI) biological wastewater treatment using sludge lysate, steps are as follows：
The preparation of step 1, sludge lysate
Excess sludge of municipal sewage plant is taken, its a concentration of 10-25g/L is adjusted, sodium hydroxide is added and controls initial pH
For 10-12；It is cracked 0.5-1.5 hours under 90-120 DEG C of temperature condition, obtains sludge lysate；Sludge lysate is existed
8000-12000r/min is centrifuged 10-30 minutes, recycles sediment, and collect supernatant, and hydrochloric acid adjusting supernatant pH is added and is
7.0-7.2；It is centrifuged 10-20 minutes in 8000-12000r/min, recycles sediment, collect supernatant, as sludge lysate；
Step 2, sludge acclimatization
Activated sludge is tamed using chromate waste waters such as plating or metallurgy；Sludge acclimatization using concentration gradient mode into
Row；It is gradually added extension rate isometric plating from high to low or metallurgy chromate waste water during domestication, while grape is added
It is sugared to be used as carbon source, it gradually tames up to Cr (VI) all removals, and every good in nitrate nitrogen removal effect, it is believed that tame and terminate；Sludge is tamed and dociled
During change, reaction temperature is maintained at 25-35 DEG C；
Step 3, sludge lysate enhanced biological handle Cr (VI) waste water
The sludge lysate that step 1 obtains and the sludge that step 2 obtains are added in chromate waste water, control sludge cracking
Liquid concentration (in terms of mg COD/L) is 200-500mg/L, sludge concentration 3-5g/L, is reacted 6-72 hours after mixing.
Beneficial effects of the present invention：
(1) preparation process of sludge lysate is simple, at low cost, non-secondary pollution.
(2) the technology bottle that carbon source is insufficient in chromate waste water biological treatment process and treatment effeciency is low can effectively be overcome
Neck.
(3) new way is provided for the recycling of excess sludge and minimizing.
Description of the drawings
Fig. 1 is the block diagram that sludge lysate provided by the invention strengthens Cr (VI) biological reducing.
In figure：Ordinate indicates Cr (VI) removal rate, unit %；Abscissa indicates Cr (VI) concentration, unit mg/L.
Black column represents sludge lysate fortification system；White column represents the control systems without sludge lysate.Show reacting in figure
After 12h, every Cr (VI) is added under concentration, Cr (VI) removal rate of sludge lysate fortification system is all apparently higher than no dirt
The control systems of mud lysate.
Specific implementation mode
With reference to technical solution and attached drawing, the invention will be further described, but the present invention is not limited to following implementations
Example.
Embodiment 1
(1) preparation of sludge lysate
Excess sludge of municipal sewage plant is taken, its a concentration of 15g/L is adjusted, the initial pH of sodium hydroxide control, which is added, is
11, at 100 DEG C, pyrolysis time is controlled at 1 hour, by sludge lysate obtained above in 10000r/min for cracking temperature control
Centrifugation 20 minutes recycles sediment, and collects supernatant, and it is 7.0 that hydrochloric acid, which is added, and adjusts supernatant pH；It is centrifuged in 10000r/min
10 minutes, sediment is recycled, collects supernatant, as sludge lysate；
(2) sludge acclimatization
Sludge acclimatization is carried out using concentration gradient mode.The equal bodies of extension rate from high to low are gradually added during domestication
Long-pending plating or metallurgy chromate waste water, while glucose is added as carbon source, it gradually tames up to Cr (VI) all removals, and respectively
Item good in nitrate nitrogen removal effect, it is believed that domestication terminates；During sludge acclimatization, reaction temperature is maintained at 25 ± 1 DEG C；
(3) sludge lysate enhanced biological handles Cr (VI) waste water
Chromate waste water group becomes the metal plating waste water after dilution, and it is 7.0 to adjust pH value, and Cr (VI) is a concentration of after dilution
50mg/L；
The sludge lysate that step 1 obtains and the sludge that step 2 obtains are added in chromate waste water, control sludge cracking
Liquid concentration (in terms of mg COD/L) is 300mg/L, sludge concentration 4g/L, is reacted 12 hours after mixing.
Embodiment 2
(1) preparation of sludge lysate
Excess sludge of municipal sewage plant is taken, its a concentration of 20g/L is adjusted, the initial pH of sodium hydroxide control, which is added, is
12, at 120 DEG C, pyrolysis time is controlled at 1 hour, by sludge lysate obtained above in 10000r/min for cracking temperature control
Centrifugation 20 minutes recycles sediment, and collects supernatant, and it is 7.0 that hydrochloric acid, which is added, and adjusts supernatant pH；It is centrifuged in 10000r/min
10 minutes, sediment is recycled, collects supernatant, as sludge lysate；
(2) sludge acclimatization
Sludge acclimatization is carried out using concentration gradient mode.The equal bodies of extension rate from high to low are gradually added during domestication
Long-pending plating or metallurgical chromate waste water, while glucose is added as carbon source, Cr (VI) is up to 120mg/L, and gradually domestication is straight
It is all removed to Cr (VI), and every good in nitrate nitrogen removal effect, it is believed that domestication terminates；During sludge acclimatization, reaction temperature is maintained at
30±1℃；
(3) sludge lysate enhanced biological handles Cr (VI) waste water
Chromate waste water group becomes the metallurgical waste water after dilution, and it is 7.0 to adjust pH value, and Cr (VI) is a concentration of after dilution
100mg/L；
The sludge lysate that step 1 obtains and the sludge that step 2 obtains are added in chromate waste water, control sludge cracking
Liquid concentration (in terms of mg COD/L) is 500mg/L, sludge concentration 5g/L, is reacted 24 hours after mixing.
Claims (1)
1. a kind of method for strengthening Cr (VI) biological wastewater treatment using sludge lysate, which is characterized in that steps are as follows：
The preparation of step 1, sludge lysate
Excess sludge of municipal sewage plant is taken, its a concentration of 10-25g/L is adjusted, it is 10- that sodium hydroxide, which is added, and controls initial pH
12；It is cracked 0.5-1.5 hours under 90-120 DEG C of temperature condition, obtains sludge lysate；By sludge lysate in 8000-
12000r/min is centrifuged 10-30 minutes, recycles sediment, and collect supernatant, and it is 7.0- that hydrochloric acid, which is added, and adjusts supernatant pH
7.2；It is centrifuged 10-20 minutes in 8000-12000r/min, recycles sediment, collect supernatant, as sludge lysate；
Step 2, sludge acclimatization
Activated sludge is tamed using chromate waste water；Sludge acclimatization is carried out using concentration gradient mode；
It is gradually added the isometric chromate waste water of extension rate from high to low during domestication, while glucose is added as carbon
Source is gradually tamed up to Cr (VI) all removals, and every good in nitrate nitrogen removal effect, it is believed that tame and terminate；During sludge acclimatization, instead
Temperature is answered to be maintained at 25-35 DEG C；
Step 3, sludge lysate enhanced biological handle Cr (VI) waste water
The sludge lysate that step 1 obtains and the sludge that step 2 obtains are added in chromate waste water, control sludge lysate is dense
Degree is 200-500mg/L, sludge concentration 3-5g/L, is reacted 6-72 hours after mixing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810255361.9A CN108439610A (en) | 2018-03-21 | 2018-03-21 | A method of strengthening Cr (VI) biological wastewater treatment using sludge lysate |
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| CN201810255361.9A CN108439610A (en) | 2018-03-21 | 2018-03-21 | A method of strengthening Cr (VI) biological wastewater treatment using sludge lysate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113399417A (en) * | 2021-05-26 | 2021-09-17 | 华南理工大学 | Method for preparing sodium humate by using sludge and application |
| CN113666490A (en) * | 2021-09-27 | 2021-11-19 | 长春工业大学 | Method for degrading chromium in surface water of tailing pond by activated sludge |
Citations (9)
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|---|---|---|---|---|
| US4933086A (en) * | 1989-08-03 | 1990-06-12 | Texaco Inc. | Partial oxidation of sewage sludge |
| RU2041861C1 (en) * | 1992-10-23 | 1995-08-20 | Беляев Юрий Александрович | Method of processing oil slime and trap oils |
| CN103523775A (en) * | 2013-09-27 | 2014-01-22 | 华南农业大学 | Sludge treatment method and agricultural sludge biochar acquired by adopting same |
| CN103981875A (en) * | 2013-12-05 | 2014-08-13 | 青岛理工大学 | Landfill method capable of synchronously stabilizing chromium slag and household garbage |
| CN104843865A (en) * | 2015-06-03 | 2015-08-19 | 中国地质大学（北京） | Liquid carbon source material for in-situ remediation of groundwater nitrate and Cr<6+> pollution |
| CN105665415A (en) * | 2016-01-19 | 2016-06-15 | 青岛理工大学 | Sludge recycling and chromium slag harmless synchronization technology |
| CN105776527A (en) * | 2016-03-25 | 2016-07-20 | 大连理工大学 | Method and plant for chromium compound pollution wastewater treatment |
| CN107055780A (en) * | 2017-03-30 | 2017-08-18 | 大连理工大学 | A kind of method that utilization sub-micron ferriferous oxide strengthens organic wastewater with difficult degradation thereby biological treatment |
| CN107262496A (en) * | 2017-06-20 | 2017-10-20 | 青岛华茂环保科技有限公司 | A kind of quick reduced chromium slag and the apparatus and method for stabilizing debirs |
-
2018
- 2018-03-21 CN CN201810255361.9A patent/CN108439610A/en not_active Withdrawn
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4933086A (en) * | 1989-08-03 | 1990-06-12 | Texaco Inc. | Partial oxidation of sewage sludge |
| RU2041861C1 (en) * | 1992-10-23 | 1995-08-20 | Беляев Юрий Александрович | Method of processing oil slime and trap oils |
| CN103523775A (en) * | 2013-09-27 | 2014-01-22 | 华南农业大学 | Sludge treatment method and agricultural sludge biochar acquired by adopting same |
| CN103981875A (en) * | 2013-12-05 | 2014-08-13 | 青岛理工大学 | Landfill method capable of synchronously stabilizing chromium slag and household garbage |
| CN104843865A (en) * | 2015-06-03 | 2015-08-19 | 中国地质大学（北京） | Liquid carbon source material for in-situ remediation of groundwater nitrate and Cr<6+> pollution |
| CN105665415A (en) * | 2016-01-19 | 2016-06-15 | 青岛理工大学 | Sludge recycling and chromium slag harmless synchronization technology |
| CN105776527A (en) * | 2016-03-25 | 2016-07-20 | 大连理工大学 | Method and plant for chromium compound pollution wastewater treatment |
| CN107055780A (en) * | 2017-03-30 | 2017-08-18 | 大连理工大学 | A kind of method that utilization sub-micron ferriferous oxide strengthens organic wastewater with difficult degradation thereby biological treatment |
| CN107262496A (en) * | 2017-06-20 | 2017-10-20 | 青岛华茂环保科技有限公司 | A kind of quick reduced chromium slag and the apparatus and method for stabilizing debirs |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113399417A (en) * | 2021-05-26 | 2021-09-17 | 华南理工大学 | Method for preparing sodium humate by using sludge and application |
| CN113666490A (en) * | 2021-09-27 | 2021-11-19 | 长春工业大学 | Method for degrading chromium in surface water of tailing pond by activated sludge |
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Application publication date: 20180824 |