CN104150730A - Method using charcoal for promoting anaerobic digestion of sludge to produce methane - Google Patents
Method using charcoal for promoting anaerobic digestion of sludge to produce methane Download PDFInfo
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- CN104150730A CN104150730A CN201310175120.0A CN201310175120A CN104150730A CN 104150730 A CN104150730 A CN 104150730A CN 201310175120 A CN201310175120 A CN 201310175120A CN 104150730 A CN104150730 A CN 104150730A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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Abstract
The invention relates to a method using charcoal for promoting anaerobic digestion of sludge to produce methane, and the method comprises the following steps: (1) adding 0.5 to 5% by volume of the dry charcoal powder into the sludge to obtain a mixed material, adjusting the mixed material pH value to 7.5-8; and (2) putting the mixed material into a sealed anaerobic digestion device for anaerobic digestion of the sludge in the condition of an intermediate temperate of 30-40 DEG C or a high temperature of 50 to 60 DEG C by means of stirring. Compared with the prior art, the charcoal powder is used as an adding material, organic matters in the sludge are fully recycled and reused, the environment pollution is reduced, the sludge anaerobic digestion time is brought forward by 15-25%, the methane production yield is increased by 40-60%; the method is simple in operation, low in investment and treatment cost, and conductive to reducing environment pollution of the sludge, separation of organic remains produced by the anaerobic digestion of the sludge and the charcoal is not needed, and the organic remains can be directly applied to soil as a soil conditioner.
Description
Technical field
The invention belongs to solid waste resource utilization field, relate to one mud is carried out to the methanogenic technique of anaerobic digestion, especially relate to and utilize charcoal to promote the methanogenic method of anaerobic sludge digestion.
Background technology
The expansion of municipal sewage plant's scale, the sludge quantity producing increases day by day.By the construction of Eleventh Five-Year Plan sewage work, more than annual sludge yield has approached 3,000 ten thousand tons (water ratio 80% dewatered sludge meters), and with annual 10% speed increase.Anaerobic digestion refers under oxygen free condition, and by amphimicrobe and obligatory anaerobic bacteria degradation of organic substances, the final product of decomposition is the process of carbonic acid gas and methane.Through the mud of anaerobic digestion, can produce methane on the one hand, realize the utilization of resource; Improve on the other hand the dewatering of mud, reduced the volume of mud, promoted final the stablizing of mud.
Traditional anaerobic digestion has sluggish, sludge retention time long (20～30 days), the shortcomings such as pond body bulk is huge, the low and sludge degradation degree poor (only can remove 30～40% volatile solid) of methane production, have limited the performance of anaerobic digestion techniques advantage.In order to improve anaerobic sludge digestion efficiency, often need to adopt pretreated method to improve solubility and the dispersiveness of mud.At present, a lot of research adopts ultrasonication, alkaline purification, thermochemical treatment and thermal treatment or several pretreatment combination size means to carry out anaerobic sludge digestion.Such as, Chinese invention patent (application number 20071063132.9) utilizes the cavitation effect of ultrasonic wave in water to produce extreme physical condition, destroys the cell wall structure of mud, and methane is produced in reinforcement sludge anaerobic digestion; Chinese invention patent (application number 201110326906) utilizes ultrasonic wave and hydrogen peroxide pre-treatment to promote the method for anaerobic sludge digestion, that hydrogen peroxide is added in mud, after rapid stirring, send in ultrasound reactor and carry out supersound process, methane production has improved 10～20%.Chinese invention patent (application number 200910052495.1) combined utilization ultrasonic wave and add sodium hydroxide technology for sludge treatment, methane production has improved 40.6%; Chinese invention patent (application number 200410014082.1) is used compared with the gamma-rays of high-penetration performance mud is carried out to radiation treatment, and the mud after irradiation carries out anaerobic digestion with seed sludge and reacts; Chinese invention patent (application number 201010266174.4) first utilizes mud electrochemical oxidation technology to destroy mud flco, realize the hydrolysis to mud, secondly in the sludge anaerobic acidification stage, control biological flora taking acid-producing bacteria as main, make the sludge fermentation acidifying after hydrolysis, at last product methane phase, by regulation and control pH value selective advantage methane flora, improve methane production; Chinese invention patent (application number 201110169395.4) adds ferrate and produces waste liquid in mud, and gas production rate improves more than 60%.These methods all can be broken up the cell walls of mud effectively, and the inside and outside organism of born of the same parents in flco is transferred in liquid phase by solid phase, promote sludge hydrolytic.But for alkali pretreatment mode, alkali dosage is large, working cost is high, instrument and equipment is caused to corrosion, also can increase the difficulty of subsequent disposal.Ultrasonic wave and gamma-rays pre-treatment be because energy consumption is high, and cost is high, severe reaction conditions and have certain risk, has limited mass-producing application.Consider the finally agricultural of actual industrial applications and digestion resistates, should adopt the mode of relative less energy-consumption, reaction conditions gentleness, protection agricultural soil to promote anaerobic sludge digestion to produce Biochemical Methane Potential.
Charcoal is Vandyke brown or the black porous material that timber or wood material obtain through pyrolysis.The fine and closely woven porous of charcoal molecule, there is larger specific surface area and superpower characterization of adsorption, aspect environmental science, soil science and agriculture production, having very wide application prospect.And China's timber resources is abundant, charcoal has the characteristics such as abundant, with low cost and excellent property of originating.
Because charcoal hole is many, specific surface area is larger, mud is had to good absorption and dispersion effect; The porousness of charcoal and surface property also can increase the microorganism volume of holding; The adjustable sludge digestion process pH value of middle meta-alkalescence of charcoal is eliminated the restraining effect of VFA to anaerobic digestion.Therefore charcoal is for the increase of methane production in sludge digestion process, and shortens and produce methane required time and have important practical significance.
Summary of the invention
Object of the present invention is exactly to provide one to utilize charcoal to promote the methanogenic method of anaerobic sludge digestion in order to overcome the defect that above-mentioned prior art exists, utilize the surface-area of charcoal powder large, high porosity, strong absorption property, ensure that charcoal powder fully contacts with sludge digestion product; And in sludge degradation, realize the accelerate sludge anaerobism start time of charcoal and the advantage of raising methane production.
Object of the present invention can be achieved through the following technical solutions:
One utilizes charcoal to promote the methanogenic method of anaerobic sludge digestion, and the method comprises the following steps:
(1) per-cent meter by volume, is added to 0.5～5.0% dry charcoal powder in mud, obtains mixture, and regulating this mixture pH value is 7.5～8.0;
(2) mixture is put into sealing anaerobic digestion equipment, under 30～40 DEG C of medium temperature conditions or 50～60 DEG C of hot conditionss, by the mode stirring, mud is carried out to anaerobic digestion.
Described charcoal powder is the charcoal powder of particle diameter < 0.5mm.The features such as charcoal has meta-alkalescence in pH, difficult degraded, porosity is high, specific surface area is large, adsorptivity is strong.
The water ratio of described mud is 80～95%, and massfraction organic in mud counts 40～80% with butt.
Compared with prior art, the present invention has the following advantages and beneficial effect:
One, the VFA that anaerobic digestion process produces can cause the reduction of pH, thereby suppresses methane production, and charcoal is alkaline adjustable digestive process pH and reaches and eliminate VFA to the inhibiting effect of anaerobic digestion.
Two, the mud in wood charcoal powder foot couple anaerobic digestion process has dissemination, makes organism in mud be converted into the organism of solubility, then increases anaerobic digestion effect.
Three, the concrete dynamic modulus of charcoal and high surface area can increase the volume of holding of microorganism.
Four, charcoal itself has the function of improving soil physico-chemical property, and the organic residue producing after anaerobic sludge digestion need not separate with charcoal, can be used as soil conditioner and is directly applied to soil.
The present invention selects charcoal powder as adding thing, makes the organism in mud obtain sufficient recovery and reuse.Reduced the pollution of mud to environment, anaerobic sludge digestion shifts to an earlier date 15～25% start time, and methane production improves 40～60%.
Brief description of the drawings
Fig. 1 is process flow sheet of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
(1) get municipal wastewater treatment plant primary sludge, the TSS (referring to the concentration of suspended substance in mud) of mud (refers in mud that suspended substance is after 575 DEG C of calcinings of high temperature for 10g/L, VSS, the organic concentration vaporing away) be 5.9g/L, add charcoal powder 0.1g;
(2) put into sealing anaerobic digestion equipment, culture temperature is controlled at 35 DEG C, and pH is controlled at 7.8; By the mode stirring, mud is carried out to Anaerobic Digestion, repeat to cultivate 3 times.
Adopt treatment process as above, the methane production of mud is compared than the operating mode that does not add charcoal powder, and methane production has improved 40%, and anaerobic sludge digestion shifts to an earlier date 20% start time.
Embodiment 2
(1) get municipal wastewater treatment plant secondary sludge, the TSS of mud is that 10g/L, VSS are 5.9g/L, adds charcoal powder 0.1g;
(2) put into sealing anaerobic digestion equipment, culture temperature is controlled at 35 DEG C, and pH is controlled at 7.8; By the mode stirring, mud is carried out to Anaerobic Digestion, repeat to cultivate 3 times.
Adopt treatment process as above, the methane production of mud is compared than the operating mode that does not add charcoal powder, and methane production has improved 40%, and anaerobic sludge digestion shifts to an earlier date 20% start time.
Embodiment 3
(1) get dewatered sludge of urban sewage plant, the TSS of mud is that 8g/L, VSS are 7.5g/L, adds charcoal powder 0.1g;
(2) put into sealing anaerobic digestion equipment, culture temperature is controlled at 35 DEG C, and pH is controlled at 7.8; By the mode stirring, mud is carried out to Anaerobic Digestion, repeat to cultivate 3 times.
Adopt treatment process as above, the methane production of mud is compared than the operating mode that does not add charcoal powder, and methane production has improved 40%, and anaerobic sludge digestion shifts to an earlier date 20% start time.
Embodiment 4
One utilizes charcoal to promote the methanogenic method of anaerobic sludge digestion, as shown in Figure 1, comprises the following steps:
(1) per-cent meter by volume, 0.5% dry charcoal powder (particle diameter < 0.5mm) is added to mud, and (water ratio of mud is 80%, massfraction organic in mud counts 40% with butt) in, obtain mixture, regulating this mixture pH value is 7.5～8.0;
(2) mixture is put into sealing anaerobic digestion equipment, under 30～40 DEG C of medium temperature conditions, by the mode stirring, mud is carried out to anaerobic digestion.
After anaerobic sludge digestion, obtain methane, the anaerobic digestion resistates producing after anaerobic sludge digestion need not separate with charcoal, can be used as soil conditioner and is directly applied to soil.
Select charcoal powder as adding thing, make the organism in mud obtain sufficient recovery and reuse.Reduced the pollution of mud to environment, anaerobic sludge digestion shifts to an earlier date 15% start time, and methane production improves 40%.
Embodiment 5
One utilizes charcoal to promote the methanogenic method of anaerobic sludge digestion, as shown in Figure 1, comprises the following steps:
(1) per-cent meter by volume, 5.0% dry charcoal powder (particle diameter < 0.5mm) is added to mud, and (water ratio of mud is 95%, massfraction organic in mud counts 80% with butt) in, obtain mixture, regulating this mixture pH value is 7.5～8.0;
(2) mixture is put into sealing anaerobic digestion equipment, under 50～60 DEG C of hot conditionss, by the mode stirring, mud is carried out to anaerobic digestion.
After anaerobic sludge digestion, obtain methane, the anaerobic digestion resistates producing after anaerobic sludge digestion need not separate with charcoal, can be used as soil conditioner and is directly applied to soil.
Select charcoal powder as adding thing, make the organism in mud obtain sufficient recovery and reuse.Reduced the pollution of mud to environment, anaerobic sludge digestion shifts to an earlier date 25% start time, and methane production improves 60%.
Embodiment 6
One utilizes charcoal to promote the methanogenic method of anaerobic sludge digestion, as shown in Figure 1, comprises the following steps:
(1) per-cent meter by volume, 2.0% dry charcoal powder (particle diameter < 0.5mm) is added to mud, and (water ratio of mud is 90%, massfraction organic in mud counts 60% with butt) in, obtain mixture, regulating this mixture pH value is 7.5～8.0;
(2) mixture is put into sealing anaerobic digestion equipment, under 30～40 DEG C of medium temperature conditions, by the mode stirring, mud is carried out to anaerobic digestion.
After anaerobic sludge digestion, obtain methane, the anaerobic digestion resistates producing after anaerobic sludge digestion need not separate with charcoal, can be used as soil conditioner and is directly applied to soil.
Select charcoal powder as adding thing, make the organism in mud obtain sufficient recovery and reuse.Reduced the pollution of mud to environment, anaerobic sludge digestion shifts to an earlier date 20% start time, and methane production improves 50%.
Claims (3)
1. utilize charcoal to promote the methanogenic method of anaerobic sludge digestion, it is characterized in that, the method comprises the following steps:
(1) per-cent meter by volume, is added to 0.5～5.0% dry charcoal powder in mud, obtains mixture, and regulating this mixture pH value is 7.5～8.0;
(2) mixture is put into sealing anaerobic digestion equipment, under 30～40 DEG C of medium temperature conditions or 50～60 DEG C of hot conditionss, by the mode stirring, mud is carried out to anaerobic digestion.
2. one according to claim 1 utilizes charcoal to promote the methanogenic method of anaerobic sludge digestion, it is characterized in that, described charcoal powder is the charcoal powder of particle diameter < 0.5mm.
3. one according to claim 1 utilizes charcoal to promote the methanogenic method of anaerobic sludge digestion, it is characterized in that, the water ratio of described mud is 80～95%, and massfraction organic in mud counts 40～80% with butt.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445849A (en) * | 2014-12-12 | 2015-03-25 | 济南大学 | Method for producing short-chain fatty acid employing combined pretreatment of activated sludge |
| CN105505996A (en) * | 2016-01-12 | 2016-04-20 | 中国科学院城市环境研究所 | Biogas residue thermal cracking solid product and application method thereof |
| CN106399385A (en) * | 2016-06-15 | 2017-02-15 | 上海市农业科学院 | Method for producing methane and preparing fertilizer simultaneously |
| CN107475304A (en) * | 2017-09-15 | 2017-12-15 | 西安建筑科技大学 | A kind of method that rapid recovery anaerobic fermentation system organic acid suppresses |
| US10196569B2 (en) | 2015-06-29 | 2019-02-05 | Tongji University | Method and system of treating biomass wastes by biochemistry-thermochemistry multi-point interconnection |
| CN111438159A (en) * | 2020-03-11 | 2020-07-24 | 上海交通大学 | Kitchen waste treatment system and treatment method |
| CN113526818A (en) * | 2021-08-02 | 2021-10-22 | 江苏理工学院 | Process for accelerating methane generation from organic solid waste by using loaded ferromagnetic catalyst |
| CN113880384A (en) * | 2021-09-15 | 2022-01-04 | 同济大学 | Method for retarding stress of high-solid-content sludge and high ammonia nitrogen and promoting directional biotransformation |
| CN114853298A (en) * | 2022-05-05 | 2022-08-05 | 同济大学 | Method for promoting anaerobic digestion of sludge to produce methane in high ammonia nitrogen environment by using high carbon-nitrogen ratio biomass carbon |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101509016A (en) * | 2009-03-23 | 2009-08-19 | 西南大学 | Method for diphasic fermentation of generating matter energy by using agricultural product castoff such as tangerine hull slag |
| CN102061254A (en) * | 2010-11-15 | 2011-05-18 | 中国农业大学 | Method for promoting solid organic waste to produce methane by utilizing composite material |
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2013
- 2013-05-13 CN CN201310175120.0A patent/CN104150730A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101509016A (en) * | 2009-03-23 | 2009-08-19 | 西南大学 | Method for diphasic fermentation of generating matter energy by using agricultural product castoff such as tangerine hull slag |
| CN102061254A (en) * | 2010-11-15 | 2011-05-18 | 中国农业大学 | Method for promoting solid organic waste to produce methane by utilizing composite material |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445849A (en) * | 2014-12-12 | 2015-03-25 | 济南大学 | Method for producing short-chain fatty acid employing combined pretreatment of activated sludge |
| CN104445849B (en) * | 2014-12-12 | 2016-04-20 | 济南大学 | A kind of combined pretreatment active sludge produces the method for short chain fatty acid |
| US10196569B2 (en) | 2015-06-29 | 2019-02-05 | Tongji University | Method and system of treating biomass wastes by biochemistry-thermochemistry multi-point interconnection |
| CN105505996A (en) * | 2016-01-12 | 2016-04-20 | 中国科学院城市环境研究所 | Biogas residue thermal cracking solid product and application method thereof |
| CN106399385A (en) * | 2016-06-15 | 2017-02-15 | 上海市农业科学院 | Method for producing methane and preparing fertilizer simultaneously |
| CN106399385B (en) * | 2016-06-15 | 2019-08-23 | 上海市农业科学院 | A kind of while methane phase and the method for preparing fertilizer |
| CN107475304A (en) * | 2017-09-15 | 2017-12-15 | 西安建筑科技大学 | A kind of method that rapid recovery anaerobic fermentation system organic acid suppresses |
| CN107475304B (en) * | 2017-09-15 | 2021-01-15 | 西安建筑科技大学 | Method for relieving inhibition of organic acid in anaerobic fermentation system and promoting degradation of VFA |
| CN111438159A (en) * | 2020-03-11 | 2020-07-24 | 上海交通大学 | Kitchen waste treatment system and treatment method |
| CN113526818A (en) * | 2021-08-02 | 2021-10-22 | 江苏理工学院 | Process for accelerating methane generation from organic solid waste by using loaded ferromagnetic catalyst |
| CN113880384A (en) * | 2021-09-15 | 2022-01-04 | 同济大学 | Method for retarding stress of high-solid-content sludge and high ammonia nitrogen and promoting directional biotransformation |
| CN114853298A (en) * | 2022-05-05 | 2022-08-05 | 同济大学 | Method for promoting anaerobic digestion of sludge to produce methane in high ammonia nitrogen environment by using high carbon-nitrogen ratio biomass carbon |
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Application publication date: 20141119 |