CN104003596A - Anaerobic fermentation device with struvite recycling function and fermentation acid production method thereof - Google Patents
Anaerobic fermentation device with struvite recycling function and fermentation acid production method thereof Download PDFInfo
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Abstract
The invention discloses an anaerobic fermentation device with a struvite recycling function. The anaerobic fermentation device comprises a tank body, wherein the tank body is internally provided with a sludge internal circulation structure and a struvite recycling structure; the sludge internal circulation structure comprises an internal circulation tube, an internal circulation pump and a sludge inlet tube; the struvite recycling structure comprises a basin-shaped structure, an inverted funnel-shaped structure, a stirring machine, an alkali liquid input device and a magnesium source liquid input device and various discharge tubes. According to a method for utilizing the anaerobic fermentation device with the struvite recycling function to ferment to produce acid, the pH value is stabilized and the nitrogen and the phosphorus in a fermented liquid are recycled by controlling the sludge feeding amount and the circulation amount every day. According to the anaerobic fermentation device with the struvite recycling function and the fermentation acid production method disclosed by the invention, the pH value in the anaerobic fermentation process is stable, the fermentation efficiency is high, the nitrogen and the phosphorus in the fermented liquid can be effectively removed, and then struvite crystal with relatively high purity can be collected, so that the method is an economic and efficient sludge treatment method and has good social and economic benefits.
Description
Technical field
The invention belongs to technical field of water pollution control, particularly a kind of anaerobic ferment devices with struvite recovery function, and utilize this device to carry out the method for fermentation and acid.
Background technology
At present, sludge digestion is mainly divided into anaerobic digestion and two kinds of modes of aerobic sigestion.Wherein the aerobic sigestion of mud is similar to activated sludge process, in aeration tank, carry out, mud is carried out the aeration of long period under the condition that does not add substrate, make microorganism in mud carry out autoxidation in the endogenous respiration stage, therefore the biodegradable part of microorganism body can oxidizedly be removed, digestible degree is high, and residue digested sludge amount is few.But aerobic sludge operation energy consumption is many, and working cost is high, and mud organic substance degree of decomposition is larger with temperature fluctuation, so most sludge digestion of present stage all adopts anaerobic digestion techniques.
Anaerobic digestion is the most frequently used method of organic sludge being carried out to stabilizing treatment, and anaerobic sludge digestion is divided into mesophilic digestion and thermophilic digestion, and anaerobic sludge digestion has overcome in aerobic sigestion process organic substance decomposing degree with problems such as temperature fluctuation are larger.And Anaerobic Microbiological Treatment Technology has that reduced investment, energy consumption are low, recoverable biogas energy, produce the plurality of advantages such as the few and anti impulsion load of mud, is the focus of present water technology research.
Affecting in the factors of sludge anaerobic biological treatment mud, pH value, fermentation and acid technique and reactor structure are the factors of outbalance wherein, wherein pH value one of most important environmental factor in anaerobic fermentation process especially.All there is the pH scope of a suitable growth in acidogenic fermentation bacterium, super going beyond the scope will cause its physiologically active to be lost.In addition, same acidogenic fermentation bacterium is due to environment pH difference, and the speed of growth and breeding and pathways metabolism all may change, and then accumulates different meta-bolitess.Therefore,, although anaerobic fermentation and acid production process can be to carry out within the scope of 3.0-12.0 at pH, different pH conditions can cause the kind of acidizing product different with content.Therefore, prior art is all to make the acid of anaerobically fermenting production by biological by continuous adjusting pH, the technical scheme of CN 101768609A disclosed " a kind of method that improves sludge anaerobic fermentation and acid production " and CN 102583917A disclosed " a kind of municipal sludge pretreatment process of reinforcement sludge anaerobic fermentation and acid production ", all needs to reach desirable pH value by adding additional material.But the continuous technical accurate calculation that needs of pH value of adjusting on the one hand; On the other hand, constantly add medicine, expend economically too much, cause fermentation and acid cost excessive, economic benefit is lower.
Meanwhile, in anaerobic fermentation and acid production process, microbes liberating nitrogen phosphorus, fermented liquid is as carbon source, and the nitrogen phosphorus in fermented liquid can increase nitrogen and phosphorus load, can greatly reduce denitrogenation dephosphorizing efficiency in sewage treatment process simultaneously, therefore, before fermented liquid is as carbon source, to remove the nitrogen phosphorus in fermented liquid.In existing technique, be all anaerobic fermentation and acid production and fermented liquid to be removed to nitrogen phosphorus separate, cause utilizing excess sludge fermentation broth wide as the technique area occupied of carbon source, anaerobic fermentation and acid production technique is extensively utilized.
Summary of the invention
The technical problem that the present invention solves: for above-mentioned deficiency, overcome the defect of prior art, the object of this invention is to provide a kind of high-performance bio anaerobism anaerobic ferment devices with struvite recovery function, and utilize this device to carry out the method for fermentation and acid.
Technical scheme: a kind of anaerobic ferment devices with struvite recovery function provided by the invention:
There is the anaerobic ferment devices that struvite reclaims function, comprise tank body, be provided with into dredge pump in tank base outside, enter mud pipe and pass into tank body inner bottom part by entering dredge pump; Be provided with flap in tank interior; Pass into inner circulating tube on tank body top, inner circulating tube by outside internal circulation pump with enter mud pipe and be connected; At tank body internal upper part, on inner circulating tube, be provided with a peviform structure, center in peviform structure is provided with down funnel-shaped structure, peviform structural perimeter is fixedly connected with tank body inner side, be provided with a vacuum breaker falling the top of funnel-shaped structure, be provided with in the bottom of peviform structure and lead to outside struvite vent pipe; Pass into alkali liquor pipe and magnesium source capsule at tank body top, alkali liquor pipe is connected with the outside lye pump of tank body, and lye pump is connected with lye tank, is provided with lye tank agitator in lye tank; Magnesium source capsule is connected with the magnesium source pump of tank body outside, and Beng Yumei source, magnesium source bucket is connected, and is provided with magnesium source bucket agitator in the bucket of magnesium source; Be provided with stirrer at tank body inner top, stirrer extends downward peviform inside configuration; At the overflow groove that is provided with of tank body inner top, external upflow tube in overflow groove; In tank body, the proximal edge side of peviform structure, is provided with a vertical doughnut-shaped steel plate, forms a sludge sump between doughnut-shaped steel plate and peviform edge, and sludge sump is connected with mud vent pipe; At tank body middle part and peviform structure top, pH value detection device is housed respectively; At tank body inner bottom part, be provided with blow-down pipe.
As preferably, the radius of fermentation unit is 1/6 of fermentation unit height.
As preferably, at tank body inner top, the outside of stirrer is provided with at least two vertical columns, and vertical column lower end connects a hollow cover.
As preferably, at tank body inner top, the outside of stirrer is provided with a vertical annular plate, and annular plate lower end connects a hollow cover.
A kind of method of utilizing the above-mentioned anaerobic ferment devices fermentation and acid with struvite recovery function provided by the invention, comprises the following steps:
(1) water inlet: will be full of water in device;
(2) enter mud and inner circulation of sludge: mud enters fermentation unit by the mud pipe that enters of fermentation unit bottom, and wherein, the mud total amount that enters fermentation unit every day is 1/15 of fermentation unit volume, and every natural gift are entered mud 10 times;
The inner circulation of sludge that mud is undertaken by internal circulation pump and the inner circulating tube of fermentation unit in fermentation unit, wherein, every day, the cycle index of inner circulation of sludge was 10 times, sludge circulation total amount is to enter 2 times of mud total amount every day;
(3) struvite reclaims: enter mud at every turn, the fermented liquid of sludge creation enters in peviform structure by the vacuum breaker falling on funnel-shaped structure, lye pump and the magnesium source pump in fermentation unit outside are opened, and the alkali lye of lye tank and Tong Neimei source, magnesium source liquid are inputed in peviform structure by alkali liquor pipe and magnesium source capsule; Stirrer is opened simultaneously, fermented liquid and alkali lye and magnesium source liquid are fully mixed, after the pH value of solution to be mixed reaches 9.0-9.5, stop adding alkali lye and magnesium source liquid, stirrer is closed, staticly settle, the struvite crystals that reaction produces is settled down to peviform structural base, discharges by struvite vent pipe;
(4) supernatant liquor that reaction produces overflows to overflow groove, discharges by upflow tube; In fermented liquid, a small amount of mud enters in sludge sump, discharges by mud vent pipe.
As preferably, the alkali lye being equipped with in lye tank is sodium hydroxide solution, and concentration is 3.125mol/L.
As preferably, the magnesium source liquid being equipped with in the bucket of magnesium source is magnesium chloride solution, and concentration is 3.125mol/L.
As preferably, the stirring velocity of stirrer is 100r/min.
Beneficial effect: the anaerobic ferment devices with struvite recovery function provided by the invention, it is a kind of high-performance bio anaerobic ferment devices that struvite reclaims that combined, this device is except having the anaerobically fermenting structure of general device, also there are two kinds of functional structures of inner circulation of sludge and fermented liquid denitrification phosphatization (being that struvite reclaims), inner circulation of sludge structure comprises inner circulating tube, internal circulation pump and enters mud pipe, carries out the circulation of upper strata mud and bottom mud in fermentation unit by internal circulation pump; Fermented liquid denitrification phosphatization structure, i.e. struvite recovery structure, struvite i.e. six hypophosphite monohydrate ammonium magnesium, are a kind of white crystals, are soluble in acidic solution, are insoluble to basic solution.In the aqueous solution, when struvite strength of solution runs up to a certain degree, struvite can crystallization.In the present invention, by constantly adding alkali lye and magnesium chloride, reaction is carried out to the right, then in removal fermented liquid, in nitrogen phosphorus, obtained struvite.This structure comprises peviform structure, fall the vent pipe of funnel-shaped structure, stirrer, alkali lye input unit and magnesium source liquid input unit and supernatant liquor, mud and struvite crystals.The above-mentioned functions structure of fermentation unit, not only can carry out efficiently the anaerobic fermentation process of mud, and there is the denitrification phosphatization function of mud, make integrated the carrying out of removal nitrogen phosphorus of fermentation and acid and fermented liquid, the supernatant liquor of discharging by upflow tube can be used as carbon source and collects, simultaneously can also high efficiente callback struvite, and the zymotechnique separating than traditional fermentation and acid and denitrification phosphatization, the area that this fermentation and acid and the integrated fermentation unit of product struvite take is less, space availability ratio is higher, and realize the multinomial recycling of excess sludge.
A kind of utilization provided by the invention has the anaerobic ferment devices fermentation and acid method of struvite recovery function, there are two kinds of outstanding effects, the one: after in mud enters fermentation unit, enter mud amount and enter mud number of times by control mud every day, and the number of times of inner circulation of sludge and total amount, reach the stable of pH value in fermenting process, then carry out efficiently fermentation and acid, in whole fermenting process, maintain pH value stabilization without adding other materials, reduced the cost of overall operation, and efficiency is higher; The 2nd,, the recovery of struvite, by struvite retrieving arrangement, in whole fermentation unit operational process, can effectively remove the nitrogen phosphorus in fermented liquid, clearance reaches more than 95%, and the purity of struvite forming reaches more than 90%, therefore the invention provides processing method and not only can maintain pH stability and high efficiency and ferment, and can effectively remove nitrogen phosphorus, generating highly purified struvite, is that a kind of sludge fermentation of economical and efficient is produced sour technique.
Brief description of the drawings
Fig. 1 is a kind of anaerobic ferment devices structural representation with struvite recovery function of the present invention.
Fig. 2 utilizes to have struvite and reclaim the anaerobic ferment devices of function and carry out in fermentation and acid process sludge fermentation in device and produce sour pH value variation diagram.
In figure: 1, enter mud pipe; 2, enter dredge pump; 3-1, a pH proofing unit; 3-2, the 2nd pH proofing unit; 4, flap; 5, internal circulation pump; 6, inner circulating tube; 7, lye pump; 8, lye tank; 9-1, lye tank agitator; 9-2, magnesium source bucket agitator; 10, magnesium source bucket; 11, magnesium source pump; 12, alkali liquor pipe; 13, magnesium source capsule; 14, stirrer; 15, overflow groove; 16, upflow tube; 17, sludge sump; 18, mud vent pipe; 19, struvite vent pipe; 20, blow-down pipe; 21, vacuum breaker; 23, vertical column; 24, hollow cover.
Embodiment
In order further to understand the present invention, below in conjunction with embodiment, the preferred embodiment of the invention is described, but should be appreciated that these are described is for further illustrating the features and advantages of the present invention, instead of limiting to the claimed invention.
Below in conjunction with accompanying drawing concrete example, embodiments of the invention are described.
Embodiment 1: a kind of anaerobic ferment devices with struvite recovery function, comprise tank body, wherein, the radius of tank body is 1/6 of tank body height, is provided with into dredge pump 2 in tank base outside, enters mud pipe 1 and passes into tank body inner bottom part by entering dredge pump 2; Establish three groups of flaps 4 in tank interior, be convenient to mud mixed fermentation; Be provided with inner circulating tube 6 on tank body top, inner circulating tube 6 by internal circulation pump 5 with enter mud pipe 1 and be connected; At tank body internal upper part, on inner circulating tube 6, be provided with a peviform structure, center in peviform structure is provided with down funnel-shaped structure, peviform structural perimeter is fixedly connected with tank body inner side, be provided with a vacuum breaker 21 falling the top of funnel-shaped structure, vacuum breaker 21 is check valves, when fermentation unit enters mud, device bottom pressure increases, fermented liquid flows in peviform structure by vacuum breaker 21, anti-locking apparatus upper liquid enters into device bottom simultaneously, is provided with leads to outside struvite vent pipe 19 in the bottom of peviform structure; Be provided with alkali liquor pipe 12 and magnesium source capsule 13 in tank body outside, alkali liquor pipe 12 is connected with the outside lye pump 7 of tank body, and lye pump 7 is connected with lye tank 8, is provided with lye tank agitator 9-1 in lye tank 8; Magnesium source capsule 13 is connected with the magnesium source pump 11 of tank body outside, and magnesium source pump 11 is connected with magnesium source bucket 10, is provided with magnesium source bucket agitator 9-2 in magnesium source bucket 10; Be provided with stirrer 14 at tank body inner top, stirrer 14 extends downward peviform inside configuration; Be provided with overflow groove 15 at tank body inner top, at the interior external upflow tube 16 of overflow groove 15; In tank body, the proximal edge side of peviform structure, is provided with a vertical doughnut-shaped steel plate, forms a sludge sump 17 between doughnut-shaped steel plate and peviform edge, and sludge sump 17 is connected with mud vent pipe 18; At tank body inner bottom part, be provided with blow-down pipe 20; Be provided with a pH value detection device at tank body middle part and the 2nd pH value detection device is equipped with on peviform structure top; Be provided with vertical column 23 in the outside of stirrer, vertical column 23 lower ends connect a hollow cover 24.
A kind of utilization provided by the invention has the anaerobic ferment devices fermentation and acid method of struvite recovery function, comprises the following steps:
(1) water inlet: will be full of water in device; In device, water inlet, is full of peviform structure bottom in device by water;
(2) enter mud and inner circulation of sludge: mud enters fermentation unit by the mud pipe 1 that enters of fermentation unit bottom, and wherein, the mud total amount that enters fermentation unit every day is 1/15 of fermentation unit volume, and every natural gift are entered mud 10 times;
The inner circulation of sludge that mud is undertaken by internal circulation pump 5 and the inner circulating tube 6 of fermentation unit in fermentation unit, wherein, every day, the cycle index of inner circulation of sludge was 10 times, sludge circulation total amount is to enter 2 times of mud total amount every day;
(3) struvite reclaims: after pH in fermentation unit is stable, enter mud at every turn, the fermented liquid of sludge creation flows in peviform structure by the vacuum breaker 21 on the top of falling funnel-shaped structure, lye pump 7 and the magnesium source pump 11 in fermentation unit outside are opened, and are that 3.125mol/L sodium hydroxide solution and magnesium source bucket 10 interior concentration are that 3.125mol/L magnesium chloride solution inputs in peviform structure by alkali liquor pipe 12 and magnesium source capsule 13 by interior lye tank 8 concentration; Stirrer 14 is opened simultaneously, stirring velocity is 100r/min, fermented liquid and alkali lye and magnesium source liquid are fully mixed, the pH value of solution to be mixed reaches after 9.3, stop adding alkali lye and magnesium source liquid, stirrer is closed, and staticly settles, the struvite crystals that reaction produces is settled down to peviform structural base, discharges by struvite vent pipe 19;
(4) supernatant liquor that reaction produces overflows to overflow groove 15, discharges by upflow tube 16, and this part supernatant liquor can be used as carbon source and collects; In fermented liquid, a small amount of mud enters in sludge sump 17, discharges by mud vent pipe 18.
After treating that device is filled water, install every 2.4h and enter mud once, every 2.4h carries out primary sludge internal recycle, single cycle amount be single enter mud amount 200%, this stage is sludge anaerobic fermentation stage; Enter mud, fermented liquid enters in peviform structure at every turn, opens the fermented liquid denitrification phosphorus stage, i.e. struvite recovery stage.
Two periods of fermenting process experience: in earlier stage, when initial period, in device, water-content is higher, and sludge anaerobic fermenting process is shorter, and in fermented liquid, nitrogen and phosphorus content is lower, and struvite yield is less, and in supernatant liquor, water content is also higher; Stationary phase, i.e. sludge anaerobic fermentation tends towards stability, and in device, pH is stabilized in 7.0 left and right, and now the recovery of fermentation and acid and struvite is in the relatively stable stage.
Utilize said apparatus and fermentation and acid technique to carry out the anaerobic fermentation and acid production experiment of excess sludge, the pH value of observing in fermentation unit changes, and record is collected supernatant liquor, detected the removal efficiency of nitrogen and phosphorus of supernatant liquor and the purity of struvite crystals.
Fig. 2 utilizes the anaerobic ferment devices with struvite recovery function to carry out in fermentation and acid process, and in fermentation unit, sludge fermentation is produced sour pH value variation diagram.As can be seen from the figure, the pH value in fermentation unit has experienced first stable trend after fluctuation, unloading phase pH value constantly fluctuate, slowly tended towards stability afterwards, be stabilized in 7.0.Be mainly the CO that bicarbonate alkalinity is produced by ammonia nitrogen and the digestive process of the decomposition of itrogenous organic substance and release thus because the interior pH value of anaerobic ferment devices is mainly controlled by bicarbonate buffer system and VFAs this period
2reaction produces, the effectively decline of buffering reaction system pH of existence of certain bicarbonate alkalinity, the stability of increase system operation.In the time that device starts 30d, pH value slowly improves, and acidication is effective, has more itrogenous organic substance to be decomposed, and the increase that is accompanied by basicity also makes the pH of system raise and tend towards stability.
After fermentation unit brings into operation, collect the supernatant liquor of discharging, calculate the clearance of nitrogen phosphorus in supernatant liquor, result shows: the average removal rate of nitrogen phosphorus reaches more than 95%.
The struvite crystals of collecting according to fermentation unit, the purity of mensuration struvite, result shows: struvite crystals average purity is more than 90%.
In summary, anaerobic ferment devices and the fermentation and acid method thereof with struvite recovery function provided by the invention, pH value stabilization in anaerobic fermentation process, fermentation efficiency is higher, and can effectively remove the nitrogen phosphorus in fermented liquid, collecting the struvite crystals that purity is higher, is a kind of method for sludge treatment of economical and efficient, has good Social benefit and economic benefit.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiment, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (8)
1. there is the anaerobic ferment devices that struvite reclaims function, comprise tank body, it is characterized in that:
Be provided with into dredge pump in tank base outside, enter mud pipe and pass into tank body inner bottom part by entering dredge pump;
In tank body, be provided with flap;
Pass into inner circulating tube on tank body top, inner circulating tube by outside internal circulation pump with enter mud pipe and be connected;
At tank body internal upper part, on inner circulating tube, be provided with a peviform structure, center in peviform structure is provided with down funnel-shaped structure, peviform structure edge and tank body inner side are fixedly linked, be provided with a vacuum breaker falling the top of funnel-shaped structure, be provided with in the bottom of peviform structure and lead to outside struvite vent pipe;
Pass into alkali liquor pipe and magnesium source capsule on tank body top, alkali liquor pipe is connected with the outside lye pump of tank body, and lye pump is connected with lye tank, is provided with lye tank agitator in lye tank; Magnesium source capsule is connected with the magnesium source pump of tank body outside, and Beng Yumei source, magnesium source bucket is connected, and is provided with magnesium source bucket agitator in the bucket of magnesium source;
Be provided with stirrer at tank body inner top, stirrer extends downward peviform inside configuration;
At the overflow groove that is provided with of tank body inner top, external upflow tube in overflow groove;
In tank body, in peviform structure, nearly upper edge side, is provided with a vertical doughnut-shaped steel plate, forms a sludge sump between doughnut-shaped steel plate and peviform edge, and sludge sump is connected with mud vent pipe;
At tank body middle part and peviform structure top, pH value detection device is housed respectively;
At tank body inner bottom part, be provided with blow-down pipe.
2. the anaerobic ferment devices with struvite recovery function according to claim 1, is characterized in that: the radius of fermentation unit is 1/6 of fermentation unit height.
3. the anaerobic ferment devices with struvite recovery function according to claim 1, is characterized in that: at tank body inner top, the outside of stirrer is provided with at least two vertical columns, and vertical column lower end connects a hollow cover.
4. the anaerobic ferment devices with struvite recovery function according to claim 1, is characterized in that: at tank body inner top, the outside of stirrer is provided with a vertical annular plate, and annular plate lower end connects a hollow cover.
5. utilize the anaerobic ferment devices anaerobic fermentation method that there is struvite and reclaim function described in claim 1, it is characterized in that, comprise the following steps:
(1) water inlet: will be full of water in device;
(2) enter mud and inner circulation of sludge: mud enters fermentation unit by the mud pipe that enters of fermentation unit bottom, and wherein, the mud total amount that enters fermentation unit every day is 1/15 of fermentation unit volume, and every natural gift are entered mud 10 times;
The inner circulation of sludge that mud is undertaken by internal circulation pump and the inner circulating tube of fermentation unit in fermentation unit, wherein, every day, the cycle index of inner circulation of sludge was 10 times, sludge circulation total amount is to enter 2 times of mud total amount every day;
(3) struvite reclaims: enter mud at every turn, the fermented liquid of sludge creation enters in peviform structure by the vacuum breaker falling on funnel-shaped structure, lye pump and the magnesium source pump in fermentation unit outside are opened, and the alkali lye of lye tank and Tong Neimei source, magnesium source liquid are inputed in peviform structure by alkali liquor pipe and magnesium source capsule; Stirrer is opened simultaneously, fermented liquid and alkali lye and magnesium source liquid are fully mixed, after the pH value of solution to be mixed reaches 9.0-9.5, stop adding alkali lye and magnesium source liquid, stirrer is closed, staticly settle, the struvite crystals that reaction produces is settled down to peviform structural base, discharges by struvite vent pipe;
(4) supernatant liquor that reaction produces overflows to overflow groove, discharges by upflow tube; In fermented liquid, a small amount of mud enters in sludge sump, discharges by mud vent pipe.
6. fermentation and acid method according to claim 5, is characterized in that: the alkali lye being equipped with in lye tank is sodium hydroxide solution, and concentration is 3.125mol/L.
7. fermentation and acid method according to claim 5, is characterized in that: the magnesium source liquid being equipped with in the bucket of magnesium source is magnesium chloride solution, and concentration is 3.125mol/L.
8. fermentation and acid method according to claim 5, is characterized in that: the stirring velocity of stirrer is 100r/min.
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| CN104498352A (en) * | 2014-11-17 | 2015-04-08 | 北京工业大学 | Apparatus and method for producing acetic acid through alkaline fermentation of residual sludge which is reinforced by pretreatment of strong base |
| CN104556631A (en) * | 2014-12-01 | 2015-04-29 | 同济大学 | Recycling treatment method for phosphorus-enriched aerobic granular sludge |
| CN106007171A (en) * | 2016-05-20 | 2016-10-12 | 河南师范大学 | Integrated sludge reduction recycling and N2O emission reduction sewage treatment device and method for operating same |
| CN106746398A (en) * | 2016-12-08 | 2017-05-31 | 河海大学 | A kind of method for improving residual active sludge anaerobic digestion performance |
| CN108217620A (en) * | 2018-01-06 | 2018-06-29 | 天津大学 | A kind of method for using sea water as magnesium source processing anaerobic fermented liquid and preparing guanite |
| CN110981137A (en) * | 2019-11-27 | 2020-04-10 | 黄细香 | Novel rod liquid stirring type biogas slurry backflow slitting manure-pollution anaerobic fermentation machine |
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| CN113582498A (en) * | 2021-07-12 | 2021-11-02 | 同济大学 | Method for recovering phosphorus from sludge rich in chemical phosphorus precipitates by using high-protein biomass wastes |
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| CN104498352A (en) * | 2014-11-17 | 2015-04-08 | 北京工业大学 | Apparatus and method for producing acetic acid through alkaline fermentation of residual sludge which is reinforced by pretreatment of strong base |
| CN104556631A (en) * | 2014-12-01 | 2015-04-29 | 同济大学 | Recycling treatment method for phosphorus-enriched aerobic granular sludge |
| CN104556631B (en) * | 2014-12-01 | 2016-08-24 | 同济大学 | A kind of processing method of rich phosphorus aerobic particle mud resource |
| CN106007171A (en) * | 2016-05-20 | 2016-10-12 | 河南师范大学 | Integrated sludge reduction recycling and N2O emission reduction sewage treatment device and method for operating same |
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| CN108217620A (en) * | 2018-01-06 | 2018-06-29 | 天津大学 | A kind of method for using sea water as magnesium source processing anaerobic fermented liquid and preparing guanite |
| CN110981137A (en) * | 2019-11-27 | 2020-04-10 | 黄细香 | Novel rod liquid stirring type biogas slurry backflow slitting manure-pollution anaerobic fermentation machine |
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| CN113582498A (en) * | 2021-07-12 | 2021-11-02 | 同济大学 | Method for recovering phosphorus from sludge rich in chemical phosphorus precipitates by using high-protein biomass wastes |
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| Publication number | Publication date |
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| CN104003596B (en) | 2015-10-28 |
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