CN109574431B - Utilize integrated device of primary sludge preparation organic carbon source - Google Patents
Utilize integrated device of primary sludge preparation organic carbon source Download PDFInfo
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- CN109574431B CN109574431B CN201811603008.1A CN201811603008A CN109574431B CN 109574431 B CN109574431 B CN 109574431B CN 201811603008 A CN201811603008 A CN 201811603008A CN 109574431 B CN109574431 B CN 109574431B
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- 239000010802 sludge Substances 0.000 title claims abstract description 84
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title description 3
- 238000000855 fermentation Methods 0.000 claims abstract description 108
- 230000004151 fermentation Effects 0.000 claims abstract description 108
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 238000000926 separation method Methods 0.000 claims abstract description 39
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 238000005192 partition Methods 0.000 claims abstract description 15
- 238000009434 installation Methods 0.000 claims abstract description 9
- 238000005070 sampling Methods 0.000 claims description 19
- 230000001174 ascending effect Effects 0.000 claims description 10
- 238000003860 storage Methods 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 abstract description 2
- 238000010992 reflux Methods 0.000 description 15
- 239000010865 sewage Substances 0.000 description 13
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 238000007599 discharging Methods 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 238000004062 sedimentation Methods 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 229920011532 unplasticized polyvinyl chloride Polymers 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 238000002407 reforming Methods 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 238000011081 inoculation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
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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
-
- 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
-
- 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
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Sludge (AREA)
Abstract
An integrated device for preparing an organic carbon source by utilizing primary sludge comprises a fermentation tank, wherein the top of the fermentation tank is provided with a sludge inlet and a heating rod installation preformed hole, the sludge inlet is externally connected with a sludge inlet pump, and the heating rod is inserted into the heating rod installation preformed hole; the inside is divided into a middle hydraulic circulation area and a surrounding mud-water separation area by a partition board, an upper fermentation product discharge port is arranged at the position corresponding to the mud-water separation area, and an upper fermentation product discharge pipe is externally connected; the bottom is provided with a mud inlet bell mouth structure and a plurality of return bell mouth structures, and is externally connected with a circulating mud inlet pipe and a circulating return branch pipe respectively, the circulating return branch pipe is converged to a circulating return main pipe, and the circulating mud inlet pipe and the circulating return main pipe are connected to two sides of a circulating pump respectively. The device integrates the characteristics of single-stage static fermentation, complete mixed fermentation and two-stage fermentation, has small occupied area, simple operation management and low energy consumption, provides a high-quality and high-efficiency internal carbon source for sludge, realizes the upgrading, solves the troublesome problem of sludge treatment, and is more economic and safer than the traditional external carbon source.
Description
Technical Field
The invention relates to a sludge treatment device, in particular to an integrated device for preparing an organic carbon source by using primary sludge.
Background
In recent years, the water environment situation of China is increasingly severe, stricter requirements are put on the effluent quality of sewage plants all over the country, and the task of upgrading and reforming is difficult. However, the main problems in upgrading and reforming of the current sewage plant are unbalanced water inlet components, low carbon nitrogen ratio (C/N) in sewage, fewer effective carbon sources which can be directly utilized by denitrifying bacteria and phosphorus accumulating bacteria in raw water carbon sources, unstable nitrogen and phosphorus content of the effluent, and difficulty in upgrading the effluent to the first grade A of national GB18918-2002 or four water bodies of surface water quality standard. Another problem is that a large amount of sludge generated by sewage treatment is difficult to treat, and particularly, the recycling of sludge is always a difficult problem.
The conventional approach to solve the carbon source demand of municipal sewage treatment plants is to provide an external carbon source to a biological treatment system, such as: methanol, ethanol, sodium acetate or industrial glucose, etc. tend to result in large primary investment, high running cost and large sludge amount. A large amount of carbohydrate (50 percent to 50 percent), protein (27 percent to 27 percent) and fat (20 percent) contained in the primary sludge belong to slow organic carbon sources. If the organic carbon source is converted into a quick organic carbon source (first matrix) and is used for a denitrification and dephosphorization system, the biological denitrification and dephosphorization efficiency of sewage can be greatly accelerated, meanwhile, the additional carbon source is avoided, and the operation cost is saved. Taking a sewage plant with a scale of 10 ten thousand m3/d as an example, the primary sludge generation amount is about 13000kg/d, the carbon source generation amount is about 7500kg/d, and the method is equivalent to saving 3200kg/d of methanol.
In the prior art, the research on sludge fermentation at home and abroad mainly aims at researching the conditions of acid production by different sludge fermentation, and has small scale, heavy theoretical analysis and mechanism research. There are few reports on the development of productive tests of practical engineering, the design and operation parameters of a carbon source preparation device are not searched, and the application of sludge fermentation acid production in the field of practical engineering is almost blank.
Disclosure of Invention
The present invention is directed to the above-mentioned problems, and provides an integrated apparatus for preparing an organic carbon source using primary sludge.
The aim of the invention can be achieved by the following technical scheme: an integrated device for preparing an organic carbon source by utilizing primary sludge comprises a fermentation tank, wherein a sludge inlet and a heating rod installation preformed hole are formed in the top of the fermentation tank, the sludge inlet is externally connected with a sludge inlet pump through a sludge inlet pipeline, and a plurality of heating rods are inserted into the heating rod installation preformed hole; the inside of the fermentation tank is divided into a hydraulic circulation area positioned in the middle and a mud-water separation area positioned at the periphery through a partition plate, the hydraulic circulation area is divided into a hydraulic ascending area positioned in the middle and a hydraulic descending area positioned at the periphery, and the hydraulic ascending area, the hydraulic descending area and the mud-water separation area are communicated; an upper fermentation product discharge port is arranged at the upper part of the fermentation tank corresponding to the mud-water separation zone, and is externally connected with an upper fermentation product discharge pipe; the bottom of fermentation cylinder is equipped with into mud horn mouth structure and backward flow horn mouth structure, advance mud horn mouth structure and be big-end-up and connect in the inboard at the bottom center of fermentation cylinder, advance mud horn mouth structure external circulation and advance mud pipe, backward flow horn mouth structure's quantity is a plurality of and a plurality of backward flow horn mouth structures are in the week side of advancing mud horn mouth structure along circumference equipartition, backward flow horn mouth structure is big-end-up and connects in the outside of the bottom of fermentation cylinder, and every backward flow horn mouth structure external circulation reflux branch pipe, a plurality of circulation reflux branch pipe gathers and is connected with circulation reflux main, circulation mud pipe and circulation reflux main are connected in the both sides of a circulating pump respectively, and circulation mud pipe, circulation reflux main and a plurality of circulation reflux branch pipe constitute circulation pipeline.
Further, the baffle includes annular inner baffle and annular outer baffle, annular inner baffle and annular outer baffle coaxial and inside and outside setting, annular inner baffle and annular outer baffle are all connected with the inner wall of fermentation cylinder through fixed steel sheet, annular inner baffle and annular outer baffle divide into hydraulic ascending district, hydraulic descending district and mud-water separation district with fermentation cylinder inner space from inside to outside in proper order.
Still further, the whole of upper portion and the top of fermentation cylinder is low in the middle height form all around, the up end of annular outer baffle is higher than the up end of annular inner baffle, and the upper portion of annular outer baffle is big-end-down and draws in the form, the whole of lower part and the bottom of fermentation cylinder is high in the middle low form all around, the lower terminal surface of annular inner baffle is lower than the lower terminal surface of annular outer baffle.
Still further, the baffle still includes annular mud-water separation baffle, annular mud-water separation baffle sets up in the upper portion of mud-water separation district, and annular mud-water separation baffle is coaxial with annular outer baffle and sets up in the week side on the upper portion of annular outer baffle, and annular mud-water separation baffle is the big-end-up and draws in the form and the lower extreme of annular mud-water separation baffle is connected with the inner wall of fermentation cylinder, annular mud-water separation baffle makes the upper portion week side of mud-water separation district divide into upper fermentation product discharge zone, fermentation cylinder's corresponding upper fermentation product discharge zone department sets up upper fermentation product discharge port.
Further, the top of the fermentation tank is externally connected with an automatic exhaust valve and a pressure gauge, and the lower part of the fermentation tank is externally connected with a thermometer and a pH meter.
Further, electromagnetic flow meters are respectively arranged on the mud inlet pipeline and the circulating mud inlet pipe.
Further, the circulating pipeline is also connected with a mud discharging pipe and a blow-down pipe, and stop valves are respectively arranged on the circulating mud inlet pipe, the circulating return main pipe, the mud discharging pipe and the blow-down pipe.
Further, the side of fermentation cylinder still is equipped with a plurality of sampling mouths, and a plurality of the sampling mouths is from the high position of one side of fermentation cylinder to the low position evenly distributed of opposite side, the external sampling tube that has of sampling mouths, be equipped with the stop valve on the sampling tube.
Further, the fermentation device further comprises a storage tank, wherein the upper fermentation product discharge pipe is connected with the storage tank, and the upper fermentation product is discharged to the storage tank in an overflow mode.
Further, the heating rod heating device also comprises a temperature monitoring system, wherein the temperature monitoring system is connected with the heating rod.
Compared with the prior art, the invention has the beneficial effects that: (1) The whole device occupies small area, and solves the problem of insufficient land used in upgrading and reforming of the sewage plant; (2) The operation is more convenient, civil facilities outside the foundation are not needed, the inflowing sludge can be decomposed into waste sludge and fermentation products through the sludge inlet pipe, the sludge discharge pipe and the carbon source pipe connected with the sewage treatment system, the waste sludge still enters the original sludge treatment flow, and the fermentation products are taken as carbon sources to be added into a denitrification section of biological treatment; (3) The produced organic carbon source can provide a high-quality carbon source for biological denitrification, has higher denitrification efficiency, reduces total nitrogen in effluent, improves emission standard, and has better effluent effect in a counter-generation tank; (4) The advantages of single-stage static fermentation, complete mixed fermentation and two-stage fermentation are combined, and the organic carbon source can be continuously prepared on line without being influenced by sewage or sludge treatment technology; (5) The main operation cost of the device is the electricity consumption of heating the electric heating rod in winter and the energy consumption of the water pump, and meanwhile, partial primary sludge can be utilized, so that the sludge treatment capacity is reduced, the sludge is recycled, and the investment is saved; (6) The device has the function options of automatic temperature control and flow control and regulation, and is provided with safety protection alarm monitoring, so that the optimal operation condition is ensured; (7) The device is designed according to the engineering principle, reduces operation management in operation, performs self-inoculation operation after one-time starting, fully utilizes the resources in the sludge without adding acid, alkali and other medicaments or biological strains; (8) The method solves the troublesome problem of sludge treatment while providing high-quality and high-efficiency carbon sources in the sludge, reduces the sludge VSS by more than 30%, relieves the problem of insufficient carbon sources of a sewage treatment system, and is more economic and safer than the traditional externally-added carbon sources such as methanol and the like.
Drawings
Fig. 1 is a schematic plan view of the present invention.
Fig. 2 is a cross-sectional view of A-A in fig. 1.
FIG. 3 is a schematic diagram of the structure of the top of the fermenter according to the present invention.
Fig. 4 is a schematic structural view of a circulation pipeline in the present invention.
FIG. 5 is a schematic diagram showing the arrangement of sampling ports of the fermenter according to the present invention.
FIG. 6 is a schematic diagram of the present invention applied to a sewage treatment system.
The components in the figures are labeled as follows:
1 fermentation tank
2 Mud inlet
3 Heating rod mounting preformed hole
4 Heating rod
5 Annular inner partition plate
6 Annular outer partition plate
7 Annular mud-water separation baffle
8 Fixed steel plate
9 Hydraulic ascending area
10 Hydraulic drop zone
11 Mud-water separation area
12 Upper fermentation product discharge zone
13 Upper layer fermentation product discharge outlet
14 UPVC pipe
15 Automatic exhaust valve
16 Pressure gauge
17 Thermometer
18 PH meter
19 Mud feed horn mouth structure
20 Reflux horn mouth structure
21 Support rib plate
22-Cycle mud inlet pipe
23 Circulation reflux branch pipe
24 Circulation return header pipe
25 Circulation pump
26 Mud pipe
27 Blow-down pipe
28 Sampling port
29 Sampling tube
30 Electromagnetic flowmeter.
Detailed Description
The following detailed description of the invention, taken in conjunction with the accompanying drawings, will provide those skilled in the art with a more readily understood understanding of how the invention may be practiced. While the present invention has been described in connection with the preferred embodiments thereof, these embodiments are set forth only and are not intended to limit the scope of the invention.
Referring to fig. 1 to 3, an integrated device for preparing an organic carbon source by using primary sludge comprises a fermentation tank 1, wherein a sludge inlet 2 and a heating rod installation preformed hole 3 are formed in the top of the fermentation tank 1, the sludge inlet 2 is externally connected with a sludge inlet pump and an electromagnetic flowmeter through a sludge inlet pipeline, the primary sludge in a primary sedimentation tank sludge discharge well is pumped into the fermentation tank 1 by the sludge inlet pump and is metered by the electromagnetic flowmeter, the heating rod installation preformed hole 3 is formed in the center of the top of the fermentation tank 1, a plurality of heating rods 4 are inserted into the fermentation tank 1 through the heating rod installation preformed hole 3, the heating rods 4 are used for heating sludge in the fermentation tank 1, and a temperature monitoring system is connected with the heating rods 4 and is used for realizing real-time monitoring and control of the temperature of the heating rods 4.
The inside of fermentation cylinder 1 is equipped with annular inner baffle 5 and annular outer baffle 6, annular inner baffle 5 and annular outer baffle 6 are coaxial and inside and outside setting, annular inner baffle 5 and annular outer baffle 6 all are connected with along the fixed steel sheet 8 of circumference equipartition, and the fixed steel sheet 8 that fig. 1 shows is four, fixed steel sheet 8 is connected with the inner wall of fermentation cylinder 1, and annular inner baffle 5 and annular outer baffle 6 divide into hydraulic ascending district 9, hydraulic descending district 10 and muddy water separation district 11 with fermentation cylinder 1 inner space from inside to outside in proper order, hydraulic ascending district 9, hydraulic descending district 10 and muddy water separation district 11 are linked together, hydraulic ascending district 9 and hydraulic descending district 10 constitute the hydraulic circulation district, the upper portion department of fermentation cylinder 1's corresponding muddy water separation district 11 is equipped with upper fermentation product discharge port 13, upper fermentation product discharge port 13 external has the UPVC pipe 14 of ball valve trend, UPVC pipe 14 is connected with ball valve, the ball valve is connected with the holding tank through the hose, and the junction of ball valve and hose is equipped with the clamp, and the fermentation cylinder 1 is added the carbon product through the carbon storage tank and is thrown into the overflow pump to the carbon storage tank, and is added the efficiency is improved to the carbon storage tank than the pump. The whole of the upper part and the top of the fermentation tank 1 is in a shape of low circumference and high middle, the upper end surface of the annular outer partition plate 6 is higher than the upper end surface of the annular inner partition plate 5, and the upper part of the annular outer partition plate 6 is in a furled shape with small upper part and large lower part; the whole of the lower part and the bottom of the fermentation tank 1 is in a shape of high circumference and low circumference, and the lower end surface of the annular inner partition plate 5 is lower than the lower end surface of the annular outer partition plate 6. The upper portion of mud-water separation district 11 still is equipped with annular mud-water separation baffle 7, annular mud-water separation baffle 7 and annular outer baffle 6 are coaxial and set up in the week side of the upper portion of annular outer baffle 6, and annular mud-water separation baffle 7 is the same and draws in the form of closing down of big-end down and annular mud-water separation baffle 7's lower extreme is connected with the inner wall of fermentation cylinder 1, annular mud-water separation baffle 7 makes the upper portion week side of mud-water separation district 11 divide into upper fermentation product discharge zone 12, fermentation cylinder 1's corresponding upper fermentation product discharge zone 12 department sets up upper fermentation product discharge port 13.
The top of the fermentation tank 1 is externally connected with an automatic exhaust valve 15 and a pressure gauge 16, the lower part of the fermentation tank 1 is externally connected with a thermometer 17 and a pH meter 18, the automatic exhaust valve 15 discharges gas generated in the fermentation process in the fermentation tank 1, and the pressure gauge 16, the thermometer 17 and the pH meter 18 detect the pressure, the temperature and the pH in the fermentation tank 1 in real time.
The bottom of fermentation cylinder 1 is equipped with into mud horn mouth structure 19 and backward flow horn mouth structure 20, advance mud horn mouth structure 19 and be big-end-up in the inboard at the bottom center of fermentation cylinder 1, advance mud horn mouth and be connected with the inner wall of fermentation cylinder 1 through a plurality of support rib plates 21 along circumference equipartition, advance mud horn mouth structure 19 external circulation and advance mud pipe 22, backward flow horn mouth structure 20's quantity is a plurality of and a plurality of backward flow horn mouth structure 20 along circumference equipartition in advance the week side of mud horn mouth structure 19, the quantity of backward flow horn mouth structure 20 that fig. 2 shows is four, backward flow horn mouth structure 20 is big-end-up in the outside at the bottom of fermentation cylinder 1, and every backward flow horn mouth structure 20 external circulation reflux branch pipe 23, a plurality of circulation reflux branch pipe 23 collect and be connected with circulation reflux main 24, circulation mud pipe 22 and circulation reflux main 24 are connected with the both sides of a circulating pump 25 respectively, circulation mud pipe 22, circulation reflux 24 and a plurality of circulation reflux branch pipes 23 constitute the circulation. The circulating pipeline is also connected with a sludge discharging pipe 26 and a blow-down pipe 27, specifically, the connection end of the sludge inlet bell mouth structure 19 of the circulating sludge inlet pipe 22 is connected with the sludge discharging pipe 26, the connection end of the circulating pump 25 of the circulating sludge inlet pipe 22 is connected with the blow-down pipe 27, the sludge discharging pipe 26 can be connected with a primary sedimentation tank, waste sludge after sludge decomposition is pumped into the primary sedimentation tank through the circulating pump 25, the recycling treatment is realized, the circulating sludge inlet pipe 22 is also provided with an electromagnetic flowmeter 30, the metering is convenient, the blow-down pipe 27 is used for discharging all media in the fermentation tank 1 through the circulating pump 25, the maintenance is convenient, and stop valves are respectively arranged on the circulating sludge inlet pipe 22, the circulating reflux main pipe 24, the sludge discharging pipe 26 and the blow-down pipe 27.
The side of fermentation cylinder 1 still is equipped with a plurality of sampling ports 28, and a plurality of sampling ports 28 follow the high position of one side of fermentation cylinder 1 to the low position evenly distributed of opposite side, sampling port 28 external sampling tube 29, be equipped with the stop valve on the sampling tube 29 equally. The number of sampling ports 28 shown in fig. 5 is five.
Referring to fig. 6, without the need of a civil engineering facility outside the foundation, the device can decompose the inflowing sludge into waste sludge and fermentation products as long as a sludge inlet pipeline, a sludge discharge pipe, a carbon source pipe and a power supply are connected, and the specific working process is as follows: the mud feeding pump works, primary sludge in a mud discharging well of the primary sedimentation tank is pumped into the fermentation tank 1 from the top of the fermentation tank 1 through a mud feeding pipeline to ferment, and the heating rod 4 heats and assists fermentation; the circulating pump 25 works, and forms hydraulic circulation through a circulating pipeline at the bottom of the fermentation tank 1 and a hydraulic circulation area inside the fermentation tank 1, so that sludge is stirred, the stirred sludge and water are mainly separated in the sludge-water separation area 11, fermentation products at the upper layer are discharged in an upper fermentation product discharge area 12 at the upper part of the sludge-water separation area 11 in an overflow mode, flow into a storage tank through a UPVC pipe 14, and then are thrown into a short-distance waste water generation tank through a carbon source throwing pump and a carbon source pipe, so that high-quality carbon sources can be provided for biological denitrification, total nitrogen in discharged water is reduced, and emission standard is improved; waste mud after sludge decomposition still enters the original sludge treatment process, and is pumped into the primary sedimentation tank again, so that the sludge recycling is realized.
The single set of device is suitable for sewage treatment plants with the scale of 1000-10000 m 3/d and the water content of the sludge is 98-97%.
The best working condition is as follows: the SCOD yield of the fermentation product is 0.3-0.5 mg SCOD/mgVSS; the yield of the VFA of the volatile fatty acid is 0.2-0.3 mgVFA/mgVSS; the maximum denitrification rate is 20-25 mgN/gVSS.h; TN and TP removal rates are improved by about 50-70%.
It should be noted that numerous variations and modifications are possible in light of the fully described invention, and are not limited to the specific examples of implementation described above. The above-described embodiments are merely illustrative of the present invention and are not intended to be limiting. In general, the scope of the present invention should include those variations or alternatives and modifications apparent to those skilled in the art.
Claims (6)
1. An integrated device for preparing an organic carbon source by using primary sludge comprises a fermentation tank and is characterized in that a sludge inlet and a heating rod installation preformed hole are formed in the top of the fermentation tank, a sludge inlet pump is externally connected to the sludge inlet through a sludge inlet pipeline, and a plurality of heating rods are inserted into the heating rod installation preformed hole; the inside of the fermentation tank is divided into a hydraulic circulation area positioned in the middle and a mud-water separation area positioned at the periphery through a partition plate, the hydraulic circulation area is divided into a hydraulic ascending area positioned in the middle and a hydraulic descending area positioned at the periphery, and the hydraulic ascending area, the hydraulic descending area and the mud-water separation area are communicated; an upper fermentation product discharge port is arranged at the upper part of the fermentation tank corresponding to the mud-water separation zone, and is externally connected with an upper fermentation product discharge pipe; the bottom of the fermentation tank is provided with a mud inlet bell mouth structure and a return bell mouth structure, the mud inlet bell mouth structure is connected to the inner side of the bottom center of the fermentation tank in a big-end-up manner, the mud inlet bell mouth structure is externally connected with circulating mud inlet pipes, the number of the return bell mouth structures is a plurality of, the return bell mouth structures are circumferentially and uniformly distributed on the circumferential side of the mud inlet bell mouth structure, the return bell mouth structures are connected to the outer side of the bottom of the fermentation tank in a big-end-up manner, each return bell mouth structure is externally connected with a circulating return branch pipe, a plurality of circulating return branch pipes are connected with circulating return main pipes in a converging manner, the circulating mud inlet pipes and the circulating return main pipes are respectively connected to two sides of a circulating pump, and the circulating mud inlet pipes, the circulating return main pipes and the circulating return branch pipes form circulating pipelines;
the integrated device also comprises a storage tank, wherein the upper fermentation product discharge pipe is connected with the storage tank, and the upper fermentation product is discharged to the storage tank in an overflow mode;
The baffle comprises an annular inner baffle and an annular outer baffle, the annular inner baffle and the annular outer baffle are coaxial and are arranged inside and outside, the annular inner baffle and the annular outer baffle are connected with the inner wall of the fermentation tank through fixed steel plates, and the annular inner baffle and the annular outer baffle divide the inner space of the fermentation tank into a hydraulic ascending area, a hydraulic descending area and a mud-water separating area from inside to outside in sequence;
The whole of the upper part and the top of the fermentation tank is in a shape of low circumference and high middle, the upper end face of the annular outer partition plate is higher than the upper end face of the annular inner partition plate, the upper part of the annular outer partition plate is in a folded shape with small upper part and large lower part, the whole of the lower part and the bottom of the fermentation tank is in a shape of high circumference and low middle, and the lower end face of the annular inner partition plate is lower than the lower end face of the annular outer partition plate;
The baffle still includes annular mud-water separation baffle, annular mud-water separation baffle sets up in the upper portion of mud-water separation district, and annular mud-water separation baffle is coaxial with annular outer baffle and set up in the week side on the upper portion of annular outer baffle, and annular mud-water separation baffle is the lower extreme that draws in form and annular mud-water separation baffle big-end down is connected with the inner wall of fermentation cylinder in the form of drawing in, annular mud-water separation baffle makes the upper portion week side of mud-water separation district divide into upper fermentation product discharge zone, fermentation cylinder's corresponding upper fermentation product discharge zone department sets up upper fermentation product discharge port.
2. The integrated device for preparing an organic carbon source by using primary sludge according to claim 1, wherein the top of the fermentation tank is externally connected with an automatic exhaust valve and a pressure gauge, and the lower part of the fermentation tank is externally connected with a thermometer and a pH meter.
3. The integrated device for preparing an organic carbon source by using primary sludge according to claim 1, wherein the sludge inlet pipeline and the circulating sludge inlet pipe are respectively provided with an electromagnetic flowmeter.
4. The integrated device for preparing an organic carbon source by using primary sludge according to claim 1, wherein the circulating pipeline is further connected with a sludge discharge pipe and a blow-down pipe, and stop valves are respectively arranged on the circulating sludge inlet pipe, the circulating return main pipe, the sludge discharge pipe and the blow-down pipe.
5. The integrated device for preparing an organic carbon source by using primary sludge according to claim 1, wherein a plurality of sampling ports are further arranged on the side face of the fermentation tank, the sampling ports are uniformly distributed from one side high position to the other side low position of the fermentation tank, sampling pipes are externally connected with the sampling ports, and stop valves are arranged on the sampling pipes.
6. The integrated apparatus for preparing an organic carbon source using primary sludge as recited in claim 1, further comprising a temperature monitoring system connected to the heating rod.
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| CN102502960A (en) * | 2011-12-26 | 2012-06-20 | 陕西清源环境实业有限公司 | Gas-liquid blending and stirring device of sewage-sludge complete mixing type anaerobic fermentation tank and treatment method thereof |
| KR101552320B1 (en) * | 2014-09-12 | 2015-09-10 | 서울과학기술대학교 산학협력단 | Energy use for heating in the aerobic fermentation balhyoyeol large sewer-wastewater thickened sludge anaerobic digestion system |
| CN209522746U (en) * | 2018-12-26 | 2019-10-22 | 上海市政工程设计研究总院（集团）有限公司 | A kind of integrated apparatus preparing organic carbon source using primary sludge |
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| JP2016083598A (en) * | 2014-10-23 | 2016-05-19 | 株式会社松本鉄工所 | Anaerobic digestion treatment system and method for organic slurry |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102502960A (en) * | 2011-12-26 | 2012-06-20 | 陕西清源环境实业有限公司 | Gas-liquid blending and stirring device of sewage-sludge complete mixing type anaerobic fermentation tank and treatment method thereof |
| KR101552320B1 (en) * | 2014-09-12 | 2015-09-10 | 서울과학기술대학교 산학협력단 | Energy use for heating in the aerobic fermentation balhyoyeol large sewer-wastewater thickened sludge anaerobic digestion system |
| CN209522746U (en) * | 2018-12-26 | 2019-10-22 | 上海市政工程设计研究总院（集团）有限公司 | A kind of integrated apparatus preparing organic carbon source using primary sludge |
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