CN109609559A - Potassium permanganate (KMnO4) improve the method that sludge anaerobic fermentation generates short chain fatty acids - Google Patents
Potassium permanganate (KMnO4) improve the method that sludge anaerobic fermentation generates short chain fatty acids Download PDFInfo
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- CN109609559A CN109609559A CN201910000676.3A CN201910000676A CN109609559A CN 109609559 A CN109609559 A CN 109609559A CN 201910000676 A CN201910000676 A CN 201910000676A CN 109609559 A CN109609559 A CN 109609559A
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P7/00—Preparation of oxygen-containing organic compounds
- C12P7/40—Preparation of oxygen-containing organic compounds containing a carboxyl group including Peroxycarboxylic acids
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
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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
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
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Abstract
The method that sludge anaerobic fermentation generates short chain fatty acids is improved the present invention relates to a kind of potassium permanganate is added.Specific method includes: that the primary sludge and excess sludge of (1) first to municipal sewage plant's generation carry out natural subsidence processing, and removal supernatant is concentrated, and fermentation raw material is obtained；(2) then potassium permanganate is added in fermentation raw material obtained above, is handled under anaerobic, generate short chain fatty acids.Sludge not only promotes the broken born of the same parents of sludge, dissolves out the organic matters such as protein, sugar largely after potassium permanganate processing, and the serious activity for limiting methane phase etc. and consuming sour microorganism, it is thus possible to greatly facilitate the amount that sludge generates short chain fatty acids.It by simple, cheap efficient operation, realizes sludge reduction and a step promotes the resource utilization of sludge, have great importance to the processing disposition of sludge.
Description
Technical field
The invention belongs to environmental protection and Treatment of Sludge resource technology fields, and in particular to one kind is to be added permanganic acid
Potassium come improve sludge anaerobic fermentation generate short chain fatty acids method.
Technical background
Currently, the quantity rapid growth of China's urban wastewater treatment firm, along with a large amount of primary sludges and excess sludge
It generates.Due to containing various pollutants in the sewage of town dweller's life discharge, dirt is entered by city planting ductwork
Water treatment plant, these pollutants can not be largely attached in the sludge of concentration by the microbial degradation in sludge.If dirty
Mud processing and disposition are inappropriate, it will cause sludge and underground water, surface water etc. to contact, contain in excess sludge wadding body a large amount of
Other poisonous and hazardous substances such as virus, heavy metal, the difficult substance being degraded by microorganisms will enter underground water and surface water
In, serious polluted underground water and surface water, and then significant damage is brought to human health.Further, since processing and the place of sludge
The expense of setting accounts for 60% or more of entire sewage treatment plant's totle drilling cost, and the activated sludge of rapid growth has become sewage treatment plant
One of important challenge.
The organic matters such as a large amount of protein, sugar are enriched in excess sludge.It is recycling sludge that anaerobic fermentation, which handles sludge,
A kind of common methods utilized, but anaerobic fermentation before this, digestion are concentrated mainly on the generation of methane, hydrogen, and for generating
Short chain volatile fatty acid, which rarely has, to be related to.Short chain fatty acids are a kind of with compared with high value-added product, can both serve as sewage
The carbon source for the treatment of plant's denitrogenation dephosphorizing realizes preferable Nitrogen/Phosphorus Removal, reduces the use of the additional carbons such as methanol, alleviates dirt
The burden of water treatment plant；Can be also used for synthesizing poly (hydroxyalkanoate) (PHAs), PHAs is a kind of thermoplastic material, mechanical performance with
Polyethylene, polypropylene are similar, but its energy complete biodegradable, have biocompatibility；In addition, excess sludge is used for anaerobism hair
Ferment, which generates short chain fatty acids, can effectively realize the minimizing of sludge, reduce the disposal costs of sludge.
Sludge anaerobic fermentation is divided into six stages, i.e. dissolution, hydrolysis, acidification, acetoxylation, homoacetogenesis and methanation
Stage.Short chain fatty acids are one of anaerobic digestion mesostates, mainly in the acidification of anaerobic fermentation, acetoxylation mistake
It is generated in journey, by microbial consumptions such as methane backerias in methanation.Therefore, increase sludge dissolution, provided for acidogenic bactria
More substrates and the activity for inhibiting consumption acetic bacterial are the key that improve sludge anaerobic fermentation to generate short chain fatty acids.Research hair
It is existing, the dissolution of sludge can be significantly improved by pretreatments such as ultrasound, heating, microwaves, improve the yield of short chain fatty acids, still
These preprocessing means are complicated for operation, energy consumption is big and be easy to cause secondary pollution, are very restricted its application, because
This, a kind of method for finding cheap and efficient sludge anaerobic fermentation generation short chain fatty acids easy to operate, safe becomes research
Hot topic.
Potassium permanganate is a kind of strong oxidizer, is widely used in disinfection, deodorization, the growth for inhibiting algae of water etc..Together
When in fields such as medicine, chemical industry also have use, particularly, potassium permanganate can effectively promote sludge as a kind of oxidant
Being crushed for cell, increases the release of organic matter, so that sludge anaerobic fermentation, which is greatly improved, generates short chain fatty acids, however,
Up to the present, it is reported not yet using the research that potassium permanganate improves sludge anaerobic fermentation generation short chain fatty acids.
Summary of the invention
The purpose of the present invention is to provide a kind of methods that the fermentation of raising sludge anaerobic generates short chain fatty acids, that is, add height
Potassium manganate promotes sludge anaerobic fermentation to generate short chain fatty acids.
In order to achieve the above object, the solution of the present invention are as follows:
A method of short chain fatty acids being generated using potassium permanganate reinforcement sludge anaerobic fermentation, are included the following steps:
(1) primary sludge to municipal sewage plant and excess sludge carry out natural subsidence, and the rear supernatant that removes carries out
Concentration, obtains fermentation raw material
(2) by above-mentioned sludge and potassium permanganate mixed processing, fermentation generates short chain fatty acids under anaerobic environment.
The sludge settling time is that for 24 hours, temperature is 4 DEG C in above-mentioned steps (1).
In above-mentioned steps (2), the dosage of potassium permanganate is 0.025~0.2g/g TSS, preferably 0.05~0.1g/g
TSS。
In above-mentioned steps (2), yeasting is anaerobic environment, i.e., nitrogen is passed through into the sludge added with potassium permanganate
Reactor is put into 35 DEG C after sealing, concussion speed is 120rpm/ until not having the presence of oxygen in reactor by 5min
In the shaking table of min.
In above-mentioned steps (2), the time of sludge anaerobic fermentation is 12d.
In a preferred case study on implementation, potassium permanganate dosage is 0.05~0.1g/g TSS.Although potassium permanganate
Dosage can promote sludge anaerobic fermentation to generate short chain fatty acids in a certain range, and in a certain range, with Gao Meng
The increase of the dosage of sour potassium, the facilitation effect for generating short chain fatty acids to sludge anaerobic fermentation are more obvious.It is contemplated that raw material
The amount ranges of the relationship of cost and short-chain fat acid yield, the comparatively ideal neopelex that the present invention uses exist
0.05~0.1g/g TSS.
Due to the technical solution more than using, the present invention has following achievement:
1. the present invention promotes sludge anaerobic fermentation to generate short chain fatty acids using potassium permanganate, it can be significantly crushed
Sludge cell releases the organic substances such as the protein in sludge, sugar, to provide more sufficient bottom for acid-producing microorganisms
Object improves the rate for generating short chain fatty acids, in addition, potassium permanganate is able to suppress the sour microorganism of consumption, reduces short chain fatty acids
Loss, increases the accumulation of short chain fatty acids, has great importance to the minimizing and recycling of realizing sludge.
2. the short chain fatty acids that the present invention generates are a kind of energy with very high added value, sewage can be effectively used for
Denitrogenation dephosphorizing and synthesizing poly (hydroxyalkanoate) (PHAs), generate short chain fatty acids using this waste of sludge, both effectively
Reduce environmental pollution, and therefrom recycles the clean energy.
Detailed description of the invention
Fig. 1 is process flow chart of the invention
Specific embodiment
Below in conjunction with specific real case, the present invention will be further described, but is not intended to limit protection model of the invention
It encloses.
Case study on implementation 1
(1) in the plexiglass box that working volume is 4L, the sludge that municipal sewage plant generates is placed at 4 DEG C
Natural subsidence 1d removes the raw material to be fermented after supernatant.
(2) sludge obtained in 500mL (1) is added in reactor, and adds the potassium permanganate of 0.05g/g TSS, stirred
It mixes uniformly.It is filled with nitrogen into reactor, continues 5min to remove oxygen, sealing reactor is put into shaking table and carries out anaerobic fermentation,
Wherein, shaker fermentation temperature is 35 ± 1 DEG C, and concussion speed is 120rpm/min, fermentation time (i.e. sludge stopping in the reactor
Stay the time) it is 4d, the yield of short chain fatty acids is 189.3mg COD/g VSS.
Case study on implementation 2
(1) in the plexiglass box that working volume is 4L, the sludge that municipal sewage plant generates is placed at 4 DEG C
Natural subsidence 1d removes the raw material to be fermented after supernatant.
(2) sludge obtained in 500mL (1) is added in reactor, and adds the potassium permanganate of 0.05g/g TSS, stirred
It mixes uniformly.It is filled with nitrogen into reactor, continues 5min to remove oxygen, sealing reactor is put into shaking table and carries out anaerobic fermentation,
Wherein, shaker fermentation temperature is 35 ± 1 DEG C, and concussion speed is 120rpm/min, fermentation time (i.e. sludge stopping in the reactor
Stay the time) it is 6d, the yield of short chain fatty acids is 206.3mg COD/g VSS.
Case study on implementation 3
(1) in the plexiglass box that working volume is 4L, the sludge that municipal sewage plant generates is placed at 4 DEG C
Natural subsidence 1d removes the raw material to be fermented after supernatant.
(2) sludge obtained in 500mL (1) is added in reactor, and adds the potassium permanganate of 0.1g/g TSS, stirred
Uniformly.It is filled with nitrogen into reactor, continues 5min to remove oxygen, sealing reactor is put into shaking table and carries out anaerobic fermentation,
In, shaker fermentation temperature is 35 ± 1 DEG C, and concussion speed is 120rpm/min, fermentation time (the i.e. stop of sludge in the reactor
Time) it is 4d, the yield of short chain fatty acids is 211.5mg COD/g VSS.
Case study on implementation 4
(1) in the plexiglass box that working volume is 4L, the sludge that municipal sewage plant generates is placed at 4 DEG C
Natural subsidence 1d removes the raw material to be fermented after supernatant.
(2) sludge obtained in 500mL (1) is added in reactor, and adds the potassium permanganate of 0.1g/g TSS, stirred
Uniformly.It is filled with nitrogen into reactor, continues 5min to remove oxygen, sealing reactor is put into shaking table and carries out anaerobic fermentation,
In, shaker fermentation temperature is 35 ± 1 DEG C, and concussion speed is 120rpm/min, fermentation time (the i.e. stop of sludge in the reactor
Time) it is 6d, the yield of short chain fatty acids is 241.5mg COD/g VSS.
Comparative example 1
(1) sludge that municipal sewage plant generates is placed on 4 in the plexiglass box that working volume is 4L by (1)
Natural subsidence 1d at DEG C removes the raw material to be fermented after supernatant.
(2) sludge obtained in 500mL (1) is added in reactor, does not add potassium permanganate, stirs evenly.Toward reaction
It is filled with nitrogen in device, continues 5min to remove oxygen, sealing reactor is put into shaking table and carries out anaerobic fermentation, wherein shaker fermentation
Temperature is 35 ± 1 DEG C, and concussion speed is 120rpm/min, and fermentation time (i.e. the residence time of sludge in the reactor) is 6d,
The yield of short chain fatty acids is 23.7mg COD/g VSS.
Case study on implementation and the short-chain fat acid yield of comparative example are as shown in table 1:
The fermentation comparison sheet of 1 embodiment of table and comparative example
As can be seen from the table, the short-chain fat acid yield of embodiment 1 to embodiment 4 compares the short chain fatty acids of ratio 1
Yield is greatly improved, and especially, the short-chain fat acid yield of the embodiment 4 under optimal conditions compares the short chain of ratio 1
Aliphatic acid yield improves maximum.
The above-mentioned description to embodiment is that this hair can be understood and used for the ease of those skilled in the art
It is bright.Although the present invention is disclosed as above with preferred embodiment, however, it is not intended to limit the invention.It is of the invention not departing from
In the case where Spirit Essence and technical solution, person skilled in the art can make many to technical solution of the present invention can
The modification or equivalent example modified to equivalent change of energy.Therefore, it is all do not depart from scope do it is any simple
Improvement and modification all should be within protection scope of the present invention.
Claims (7)
1. a kind of improve the method that sludge generates short chain fatty acids using potassium permanganate, which is characterized in that mainly include following step
It is rapid:
The activated sludge for taking municipal sewage plant to generate carries out concentration and is detested after natural subsidence removes supernatant
Obtained sludge is mixed with potassium permanganate, is fermented under anaerobic environment by aerobe fermentation raw material, generates short chain fatty acids.
2. a kind of method for improving sludge generation short chain fatty acids using potassium permanganate according to claim 1, feature
Be: the sludge is the activated sludge that municipal wastewater treatment plant generates, and dwell temperature is 4 DEG C, and the sedimentation time is 1 day.
3. a kind of method for improving sludge generation short chain fatty acids using potassium permanganate according to claim 1, feature
Be: the dosage that adds of the potassium permanganate is 0.025~0.2g/g TSS, preferably 0.05~0.1g/g TSS.
4. a kind of method for improving sludge generation short chain fatty acids using potassium permanganate according to claim 1, feature
It is: exists to by being passed through nitrogen 5min no oxygen into reactor in pretreated sludge, entire yeasting is kept
For anaerobism.
5. a kind of method for improving sludge generation short chain fatty acids using potassium permanganate according to claim 1, feature
Be: the anaerobic fermentation temperature is 35 ± 1 DEG C.
6. a kind of method for improving sludge generation short chain fatty acids using potassium permanganate according to claim 1, feature
Be: the concussion speed is 120rpm/min.
7. a kind of method for improving sludge generation short chain fatty acids using potassium permanganate according to claim 1, feature
Be: the time of the sludge fermentation is 8~14d.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110204160A (en) * | 2019-05-30 | 2019-09-06 | 湖南大学 | A method of inhibit sludge anaerobic fermentation to generate hydrogen sulfide |
| CN110204159A (en) * | 2019-05-30 | 2019-09-06 | 湖南大学 | A kind of method of refractory organics substance in removal sludge |
| CN114772888A (en) * | 2022-04-20 | 2022-07-22 | 华中科技大学 | Method for producing short-chain fatty acid by using thiosulfate to reinforce ferrous salt/persulfate treatment sludge |
| CN115321772A (en) * | 2022-07-25 | 2022-11-11 | 湖南平安环保股份有限公司 | Method for improving short-chain fatty acid produced by sludge through sodium dichloroisocyanurate combined ultrasonic pretreatment |
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| CN105886559A (en) * | 2016-05-05 | 2016-08-24 | 南京理工大学 | Method for producing short-chain fatty acid by anaerobic fermentation of residual sludge |
| CN108441522A (en) * | 2018-03-29 | 2018-08-24 | 湖南大学 | The method that potassium hydrogen persulfate composite salts (PMS) promote excess sludge anaerobic fermentation production aliphatic acid |
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2019
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| CN105886559A (en) * | 2016-05-05 | 2016-08-24 | 南京理工大学 | Method for producing short-chain fatty acid by anaerobic fermentation of residual sludge |
| CN108441522A (en) * | 2018-03-29 | 2018-08-24 | 湖南大学 | The method that potassium hydrogen persulfate composite salts (PMS) promote excess sludge anaerobic fermentation production aliphatic acid |
| CN108624629A (en) * | 2018-06-07 | 2018-10-09 | 湖南大学 | A kind of method that contaminant degradation produces aliphatic acid simultaneously in promotion excess sludge |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110204160A (en) * | 2019-05-30 | 2019-09-06 | 湖南大学 | A method of inhibit sludge anaerobic fermentation to generate hydrogen sulfide |
| CN110204159A (en) * | 2019-05-30 | 2019-09-06 | 湖南大学 | A kind of method of refractory organics substance in removal sludge |
| CN114772888A (en) * | 2022-04-20 | 2022-07-22 | 华中科技大学 | Method for producing short-chain fatty acid by using thiosulfate to reinforce ferrous salt/persulfate treatment sludge |
| CN114772888B (en) * | 2022-04-20 | 2023-11-21 | 华中科技大学 | Method for producing short-chain fatty acid by treating sludge with thiosulfate reinforced ferrous salt/persulfate |
| CN115321772A (en) * | 2022-07-25 | 2022-11-11 | 湖南平安环保股份有限公司 | Method for improving short-chain fatty acid produced by sludge through sodium dichloroisocyanurate combined ultrasonic pretreatment |
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