CN103773818A - Method for producing carbon source by carrying out anaerobic fermentation on kitchen waste - Google Patents
Method for producing carbon source by carrying out anaerobic fermentation on kitchen waste Download PDFInfo
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- CN103773818A CN103773818A CN201410036431.3A CN201410036431A CN103773818A CN 103773818 A CN103773818 A CN 103773818A CN 201410036431 A CN201410036431 A CN 201410036431A CN 103773818 A CN103773818 A CN 103773818A
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Abstract
The invention provides a process for producing a carbon source by carrying out anaerobic fermentation on kitchen waste. The process comprises the following steps: step 1, enabling collected kitchen waste to pass through a grating and simply sorting; separating the kitchen waste into a dehydrated dry material and an oil-water mixture by a crushing dehydrating machine; step 2, discharging the dehydrated dry material into a homogenizing and sand removing device and discharging the oil-water mixture into an oil-water separator to realize oil-water separation; recycling separated oil and discharging oil-removing sewage into the homogenizing and sand removing device; step 3, adding tap water dehydrated dry material, the oil-removing sewage and tap water into the homogenizing and sand removing device so that the tap water dehydrated dry material, the oil-removing sewage and the tap water are uniformly mixed; removing sand to prepare kitchen waste slurry; step 4, putting the kitchen waste slurry into an anaerobic acid generating tank to be fermented; controlling pH (Potential of Hydrogen), temperatures and agitating parameters; and step 5, treating fermented hydrolyzed acidizing fluid by a centrifuging machine to obtain liquid supernatant enriched with the carbon source. The process realizes the reduction, the recycling and the harmlessness of the kitchen waste.
Description
Technical field
The invention belongs to solid waste disposal technical field, particularly a kind of method of utilizing changing food waste anaerobically fermenting production carbon source.
Background technology
Changing food waste is the important component part of domestic waste, accounts for 30%～50% of domestic waste total amount.Changing food waste is take organic substances such as starch based, foodstuff fibre class, animal tallow classes as main component, there is the features such as high-moisture, high grease, high salinity and perishable smelly, readily biodegradable, and the changing food waste overwhelming majority of China is all the formal layout with landfill, not only take the land resources of a large amount of preciousnesses, and pollution surrounding enviroment, residue part is used as feed also because homology pollution problem is prohibited gradually.Therefore, find a kind ofly can realize the minimizing of changing food waste, processing mode innoxious, resource utilization has become the focus of common concern.
On the other hand, along with country is more and more higher to sewage disposal plant effluent water quality requirement, sewage work is also more and more higher to the demand of the carbon source as biological carbon and phosphorous removal important factor.Conventional carbon source comprises take methyl alcohol, acetic acid, glucose as main low molecule organic matter and novel solid carbon source at present.But because traditional carbon source toxicity is high, expensive, novel carbon source exists application inconvenience, problem that aftertreatment is difficult, therefore, be necessary to seek a kind of cheap and carbon source that denitrification is respond well.
Changing food waste anaerobically fermenting production carbon source technique, can be in realizing organic matter degradation, reaches the object of resource recycling.In the fermented liquid of this explained hereafter, contain in a large number take short chain volatile organic acid (acetic acid, propionic acid, butyric acid, valeric acid, caproic acid etc.), ethanol as main end tunning, can be used as sewage denitrification and dephosphorization additional carbon.Experiment shows to utilize its Nitrogen/Phosphorus Removal of carbon source of this explained hereafter to be obviously better than traditional carbon source methyl alcohol, ethanol etc., and production cost is very cheap.
Summary of the invention
In order to overcome the defect of above-mentioned prior art, the object of the present invention is to provide a kind of technique of utilizing changing food waste anaerobism production carbon source, this technique is applicable to the changing food waste processing that scale is 1～15t/d, the present invention utilizes the feature that changing food waste organic content is high, in conjunction with anaerobic hydrolysis-acidification technique, by controlling anaerobically fermenting reaction conditions, voltaile fatty acid in fermented liquid (acetic acid, propionic acid, butyric acid, valeric acid) and ethanol are accumulated in a large number.Above-mentioned organism is all the carbon sources with good denitrogenation dephosphorizing effect, not only can solve traditional carbon sources such as methyl alcohol expensive, and highly toxic problem also can realize minimizing, the resource utilization and innoxious of changing food waste.
For achieving the above object, technical scheme of the present invention is:
A technique of utilizing changing food waste anaerobically fermenting production carbon source, its step comprises:
The changing food waste that step 1, receipts ship is first by grid and simple sorting, the material that wooden chopsticks wherein, medicated napkin, beverage bottle, glass-ceramic fragment is unfavorable for to fermentation is removed, and uses crushing/dewatering machine to be separated into dehydration siccative and oil-water mixture two portions the changing food waste after sorting afterwards;
Step 2, above-mentioned dehydration siccative is entered to homogenate sand separator, oil-water mixture is entered to water-and-oil separator and realize oily water separation, isolated grease recoverable, de-oiling sewage enters homogenate sand separator;
Step 3, to adding dehydration siccative, de-oiling sewage and tap water in homogenate sand separator, three is evenly mixed and desanding after make the changing food waste homogenate that solid content is 10-20%;
Step 4, above-mentioned changing food waste homogenate is put into anaerobic acid-production tank ferment, control pH, temperature, fermentation time and mixing parametric, make a large amount of accumulation such as meta-bolites acetic acid, propionic acid, butyric acid, valeric acid and ethanol;
PH is controlled by automatic powder adding hydro-oxidation sodium and hydrochloric acid soln, and value is 3.0～8.0;
Temperature is controlled by constant temperature water tank, and value is 25 ℃～55 ℃;
Mixing speed is controlled by variator, and value is 50～200rmp;
Fermentation time is controlled at 4 days;
Step 5, fermentation acidication liquid later obtain being rich in the supernatant liquor of carbon source after whizzer separates.
In the time that raw material changing food waste solid content is 15%, fermentation reaction is after 4 days, more than in changing food waste supernatant liquor, COD concentration reaches 90g/L, organic acid concentration reaches 34g/L, ethanol reaches 4gCOD/L, and COD/N is between 70-85, is significantly higher than pending sewage or the COD/N of percolate.
The present invention has the following advantages:
1, the invention provides a kind of changing food waste that can suitability for industrialized production carbon source and process the technique of disposing, that this technique has is innoxious, the feature of minimizing, resource utilization.
2, the carbon source concentration that the present invention produces is very high, and after the reaction of 4 days, effectively carbon source concentration can reach 82gCOD/L.
3, in product, foreign matter content is few, can not bring burden to sewage work's denitrification dephosphorization system.In the acidizing fluid producing, COD/N is 70-95, is significantly higher than pending sewage or the COD/N of percolate.
4, the required area of mill site of technique provided by the invention is little, is only 150 ㎡ left and right, builds place flexible, can build in catering trade concentrated area or refuse transfer station be reconstructed.
5, running cost is low, and income is high, and the raw material of this technology is changing food waste, not only without purchase, even can collect handling to changing food waste provider, its carbon source of producing can be sold to sewage work and refuse landfill, and the grease that byproduct reclaims also can be sold.
The present invention can be widely used in the processing of changing food waste and obtaining of sewage work's denitrogenation dephosphorizing carbon source.
Accompanying drawing explanation
Fig. 1 is changing food waste anaerobically fermenting production carbon source process flow sheet.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the process flow sheet that utilizes changing food waste anaerobically fermenting production carbon source of the present invention.Changing food waste 1, through crushing/dewatering machine 2, homogenate sand separator 8, anaerobic fermentation tank 11 and whizzer 13, obtains being rich in the organic acid mixed solution 16 of carbon source, arrives in denitrification dephosphorization system 17 and utilizes.
The present invention for addressing the above problem adopted concrete steps is:
The changing food waste 1 that receipts are shipped removes by grid and simple sorting the material that wooden chopsticks wherein, medicated napkin, beverage bottle, glass-ceramic fragment etc. are unfavorable for fermentation, uses afterwards crushing/dewatering machine 2 to be separated into dehydration siccative 3 and oil-water mixture 4 two portions; Above-mentioned dehydration siccative 3 is entered to homogenate sand separator 8, oil-water mixture 4 is entered to water-and-oil separator 5 and realize oily water separation, isolated grease 7 recoverables, de-oiling sewage 6 enters homogenate sand separator 8; In homogenate sand separator 8, add dehydration siccative 3, de-oiling sewage 6 and tap water 9, make three evenly mix the changing food waste homogenate 10 of making suitable solid content after also desanding; Above-mentioned changing food waste homogenate 10 is put into anaerobic acid-production tank 11 ferments; Fermentation acidication liquid 12 later obtains rich organic acid supernatant liquor 16 and centrifugal residue 14 through whizzer 13; Rich organic acid supernatant liquor 16 is introduced denitrification dephosphorization system 17 as carbon source, and centrifugal residue 14 carries out ultimate disposal.
In the present invention, need the parameter setting of several keys: pH, temperature, reaction times and solid content.Because relating to biological respinse, and the reactive behavior difference of microorganism under different pH causes carbon source output also different.In the present invention, the scope of pH is chosen to be 3.0～8.0.Also difference to some extent of the reactive behavior of microorganism under differing temps, in the present invention, the selected scope of temperature is 25 ℃～55 ℃.The solid content height of changing food waste has determined organic content, thereby carbon source concentration and carbon source productive rate are had to direct impact.In the present invention, changing food waste concentration is 10%～20%, can realize higher carbon source output and productive rate, and in the present invention, the reaction times is elected 4 days as.
Illustrate effect of the present invention below in conjunction with embodiment.
Embodiment mono-
The solid content of raw material changing food waste is 10%, VS/TS is 94.8%, and before fermentation, in changing food waste supernatant liquor, organic acid concentration is not 450mg/L, and COD content is 49g/L, the operational condition of hydrolysis acidogenic reactor is 35 ℃ of temperature, pH is 6.0, and fermentation reaction is after 3 days, more than in changing food waste supernatant liquor, COD concentration reaches 59g/L, organic acid concentration reaches 24g/L, ethanol reaches 3g/L, and COD/N is 80 left and right, is significantly higher than pending sewage or the COD/N of percolate.
Embodiment bis-
The solid content of raw material changing food waste is 15%, VS/TS is 95.2%, and before fermentation, in changing food waste supernatant liquor, organic acid concentration is not 675mg/L, and COD content is 73g/L, the operational condition of hydrolysis acidogenic reactor is 35 ℃ of temperature, pH is 6.0, and fermentation reaction is after 3.5 days, more than in changing food waste supernatant liquor, COD concentration reaches 90g/L, organic acid concentration reaches 34g/L, ethanol reaches 4g/L, and COD/N is 85 left and right, is significantly higher than pending sewage or the COD/N of percolate.
Embodiment tri-
The solid content of raw material changing food waste is 20%, VS/TS is 96.9%, and before fermentation, in changing food waste supernatant liquor, organic acid concentration is not 900mg/L, and COD content is 100g/L, the operational condition of hydrolysis acidogenic reactor is 35 ℃ of temperature, pH is 6.0, and fermentation reaction is after 4 days, more than in changing food waste supernatant liquor, COD concentration reaches 105g/L, organic acid concentration reaches 35g/L, ethanol reaches 5g/L, and COD/N is 80 left and right, is significantly higher than pending sewage or the COD/N of percolate.
Claims (1)
1. a technique of utilizing changing food waste anaerobically fermenting production carbon source, is characterized in that, its step comprises:
The changing food waste that step 1, receipts ship is first by grid and simple sorting, the material that wooden chopsticks wherein, medicated napkin, beverage bottle, glass-ceramic fragment is unfavorable for to fermentation is removed, and uses crushing/dewatering machine to be separated into dehydration siccative and oil-water mixture two portions the changing food waste after sorting afterwards;
Step 2, above-mentioned dehydration siccative is entered to homogenate sand separator, oil-water mixture is entered to water-and-oil separator and realize oily water separation, isolated grease recoverable, de-oiling sewage enters homogenate sand separator;
Step 3, to adding dehydration siccative, de-oiling sewage and tap water in homogenate sand separator, three is evenly mixed and desanding after make the changing food waste homogenate that solid content is 10-20%;
Step 4, above-mentioned changing food waste homogenate is put into anaerobic acid-production tank ferment, control pH, temperature, fermentation time and mixing parametric, meta-bolites acetic acid, propionic acid, butyric acid, valeric acid and ethanol are accumulated in a large number;
PH is controlled by automatic powder adding hydro-oxidation sodium and hydrochloric acid soln, and value is 3.0～8.0;
Temperature is controlled by constant temperature water tank, and value is 25 ℃～55 ℃;
Mixing speed is controlled by variator, and value is 50～200rmp;
Fermentation time is controlled at 4 days;
Step 5, fermentation acidication liquid later obtain being rich in the supernatant liquor of carbon source through whizzer.
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104324930A (en) * | 2014-11-10 | 2015-02-04 | 合肥工业大学 | Method for producing dissoluble carbon source needed by waste water denitrification from kitchen waste |
| CN104450802A (en) * | 2014-12-19 | 2015-03-25 | 安徽工程大学 | Treatment method for kitchen waste |
| CN107350277A (en) * | 2017-06-20 | 2017-11-17 | 西安市第八十三中学 | It is a kind of that the biological prosthetic method of oil-polluted soils is promoted using garbage fermentation liquid |
| CN108529747A (en) * | 2018-04-25 | 2018-09-14 | 浙江工业大学膜分离与水处理协同创新中心湖州研究院 | Nitration denitrification simultaneous denitrification method |
| CN109896708A (en) * | 2019-03-20 | 2019-06-18 | 西藏锦瑞环境科技有限责任公司 | A kind of kitchen garbage, waste-water processing system |
| CN110747238A (en) * | 2019-11-18 | 2020-02-04 | 浙江伊诺环保科技股份有限公司 | Process for preparing carbon source by utilizing kitchen waste |
| CN110951789A (en) * | 2019-12-17 | 2020-04-03 | 清华大学深圳国际研究生院 | Kitchen waste treatment method and system |
| CN111118069A (en) * | 2019-12-18 | 2020-05-08 | 长沙凯天工研院环保服务有限公司 | Method for producing bioethanol by anaerobic fermentation of kitchen waste |
| CN111589841A (en) * | 2020-05-28 | 2020-08-28 | 江南大学 | Method for extracting carbon source in kitchen solid residue by enzyme method |
| CN112626139A (en) * | 2020-12-18 | 2021-04-09 | 深圳市利赛环保科技有限公司 | Method and device for producing carbon source by using kitchen garbage |
| CN112808738A (en) * | 2020-12-25 | 2021-05-18 | 浙江启迪生态科技有限公司 | Method for preparing carbon source by utilizing kitchen waste |
| CN113770157A (en) * | 2021-09-03 | 2021-12-10 | 杭州市环境集团有限公司 | Method for preparing sewage carbon source by using kitchen waste and feasibility testing method thereof |
| CN113912184A (en) * | 2021-10-22 | 2022-01-11 | 广州市香港科大霍英东研究院 | Method for improving sewage treatment effect of low CN ratio |
| CN114409188A (en) * | 2022-01-17 | 2022-04-29 | 深圳市深水水务咨询有限公司 | Anaerobic fermentation biogas slurry treatment method using kitchen waste hydrolysate as carbon source |
| CN115193881A (en) * | 2022-05-31 | 2022-10-18 | 深圳市盘龙环境技术有限公司 | Process for preparing volatile organic acid from kitchen fruit and vegetable waste slurry |
| CN115193868A (en) * | 2022-09-08 | 2022-10-18 | 国投信开水环境投资有限公司 | Advanced co-treatment method for high-solid-content kitchen garbage and domestic sewage |
| CN115678922A (en) * | 2022-05-17 | 2023-02-03 | 深圳市盘龙环境技术有限公司 | Process for directionally preparing VFAs organic acid by resourceful treatment of kitchen garbage |
| WO2023206810A1 (en) * | 2022-04-24 | 2023-11-02 | 南京万德斯环保科技股份有限公司 | Method for recovering ammonia nitrogen in kitchen waste and preparing carbon source for sewage treatment |
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Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104324930A (en) * | 2014-11-10 | 2015-02-04 | 合肥工业大学 | Method for producing dissoluble carbon source needed by waste water denitrification from kitchen waste |
| CN104450802A (en) * | 2014-12-19 | 2015-03-25 | 安徽工程大学 | Treatment method for kitchen waste |
| CN104450802B (en) * | 2014-12-19 | 2018-12-18 | 安徽工程大学 | A kind of processing method of kitchen garbage |
| CN107350277A (en) * | 2017-06-20 | 2017-11-17 | 西安市第八十三中学 | It is a kind of that the biological prosthetic method of oil-polluted soils is promoted using garbage fermentation liquid |
| CN108529747A (en) * | 2018-04-25 | 2018-09-14 | 浙江工业大学膜分离与水处理协同创新中心湖州研究院 | Nitration denitrification simultaneous denitrification method |
| CN108529747B (en) * | 2018-04-25 | 2021-09-17 | 浙江工业大学膜分离与水处理协同创新中心湖州研究院 | Synchronous denitrification method by nitrification and denitrification |
| CN109896708A (en) * | 2019-03-20 | 2019-06-18 | 西藏锦瑞环境科技有限责任公司 | A kind of kitchen garbage, waste-water processing system |
| CN110747238B (en) * | 2019-11-18 | 2021-06-01 | 浙江伊诺环保科技股份有限公司 | Process for preparing carbon source by utilizing kitchen waste |
| CN110747238A (en) * | 2019-11-18 | 2020-02-04 | 浙江伊诺环保科技股份有限公司 | Process for preparing carbon source by utilizing kitchen waste |
| CN110951789B (en) * | 2019-12-17 | 2023-07-18 | 清华大学深圳国际研究生院 | Kitchen waste treatment method and system |
| CN110951789A (en) * | 2019-12-17 | 2020-04-03 | 清华大学深圳国际研究生院 | Kitchen waste treatment method and system |
| CN111118069A (en) * | 2019-12-18 | 2020-05-08 | 长沙凯天工研院环保服务有限公司 | Method for producing bioethanol by anaerobic fermentation of kitchen waste |
| CN111589841A (en) * | 2020-05-28 | 2020-08-28 | 江南大学 | Method for extracting carbon source in kitchen solid residue by enzyme method |
| CN111589841B (en) * | 2020-05-28 | 2021-08-24 | 江南大学 | Method for extracting carbon source in kitchen solid residue by enzyme method |
| CN112626139A (en) * | 2020-12-18 | 2021-04-09 | 深圳市利赛环保科技有限公司 | Method and device for producing carbon source by using kitchen garbage |
| CN112808738A (en) * | 2020-12-25 | 2021-05-18 | 浙江启迪生态科技有限公司 | Method for preparing carbon source by utilizing kitchen waste |
| CN113770157A (en) * | 2021-09-03 | 2021-12-10 | 杭州市环境集团有限公司 | Method for preparing sewage carbon source by using kitchen waste and feasibility testing method thereof |
| CN113912184A (en) * | 2021-10-22 | 2022-01-11 | 广州市香港科大霍英东研究院 | Method for improving sewage treatment effect of low CN ratio |
| CN114409188A (en) * | 2022-01-17 | 2022-04-29 | 深圳市深水水务咨询有限公司 | Anaerobic fermentation biogas slurry treatment method using kitchen waste hydrolysate as carbon source |
| WO2023206810A1 (en) * | 2022-04-24 | 2023-11-02 | 南京万德斯环保科技股份有限公司 | Method for recovering ammonia nitrogen in kitchen waste and preparing carbon source for sewage treatment |
| CN115678922A (en) * | 2022-05-17 | 2023-02-03 | 深圳市盘龙环境技术有限公司 | Process for directionally preparing VFAs organic acid by resourceful treatment of kitchen garbage |
| CN115193881A (en) * | 2022-05-31 | 2022-10-18 | 深圳市盘龙环境技术有限公司 | Process for preparing volatile organic acid from kitchen fruit and vegetable waste slurry |
| CN115193868A (en) * | 2022-09-08 | 2022-10-18 | 国投信开水环境投资有限公司 | Advanced co-treatment method for high-solid-content kitchen garbage and domestic sewage |
| CN115193868B (en) * | 2022-09-08 | 2023-01-20 | 国投信开水环境投资有限公司 | Advanced co-treatment method for high-solid-content kitchen garbage and domestic sewage |
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Application publication date: 20140507 |