CN104310586A - Treatment system and treatment process for waste liquid in dried melon reducing sugar production process - Google Patents
Treatment system and treatment process for waste liquid in dried melon reducing sugar production process Download PDFInfo
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- CN104310586A CN104310586A CN201410547523.8A CN201410547523A CN104310586A CN 104310586 A CN104310586 A CN 104310586A CN 201410547523 A CN201410547523 A CN 201410547523A CN 104310586 A CN104310586 A CN 104310586A
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- aerobic
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
Abstract
The invention relates to a treatment system and a treatment process for waste liquid in a dried melon reducing sugar production process. A waste liquid storage tank of the treatment system is connected with one end of a diversion tank, the bottom end of the diversion tank is communicated with the bottom of a multistage aerobic and anaerobic system, the top of a last-stage aerobic tank of the three-stage aerobic and anaerobic system is connected with a biological fluidized bed, the other end of the biological fluidized bed is connected with a ceramic membrane sewage treatment device, and sludge separation outlets of the biological fluidized bed, the ceramic membrane sewage treatment device and the three-stage aerobic and anaerobic system are all connected to an active sludge separation concentration device. The waste liquid flows through the diversion tank and is sequentially treated by the multistage aerobic and anaerobic system, the biological fluidized bed and the ceramic membrane sewage treatment device, then the treated waste liquid is recycled as size mixing water, and sludge produced by the system is concentrated and dried to form dried sludge. The treatment system and the treatment process have the characteristics of high environment friendliness, high resource utilization rate, high treatment effect, strong impact resistance and full-automatic control.
Description
Technical field
The invention belongs to environmental protection treatment technology, relate to the process of high concentrated organic wastewater, reuse.Waste liquid complete poor anaerobic-aerobic-biological fluidized bed associated treatment process system is produced in particular to the dry reducing sugar of melon.
Background technology
China is reducing sugar big producing country, and production technique is based on starchy material hydrolysis method, and as the main raw material that development reducing sugar is produced, melon is dry lower as present stage cost, can the non-grain raw material of implant mass, and development prospect is better.But the waste liquid in its production process is a kind of organic waste water of high density, its main component is the compositions such as undecomposed starch, fiber and pectin substance, its COD content is on average up to 50000 mg/L, suspension content 30000 mg/L, pH maintains about 4, and the production of reducing sugar per ton will produce the waste liquid of about about 12 tons.If this waste liquid will cause huge harm to environment without process.
Current melon does waste liquid in production process mainly with anaerobic technique process, and wherein the solid-liquid separation pre-processing requirements of anaerobic treatment method to waste water is higher, and solid-liquid separation treater still containing quite high solid substance, is unfavorable for subsequent high temperature anaerobic treatment after isolation.Although complete poor anaerobic treatment method does not have hard requirement to the solid concentration height in waste liquid, due to without pre-treatment, and directly carry out the anaerobic treatment of waste liquid, when there will be separation, equipment organic loading (can reach 9 kg/m during high temperature
3about d) excessive, the problems such as investment increases, treatment effect is undesirable.
In addition, in existing treatment process, major applications be artificial membrane MBR, this microbial film price is high, costly, although the characteristics such as emerged in operation sludge bulking phenomenon can be prevented, also impact to the structure of aquatic ecosystem and using function.
Summary of the invention
The object of the application is to provide the liquid waste treatment system in the dry reducing sugar production technique of a kind of melon, organically combines with the production process of reducing sugar, forms rounded system, realizes unattended operation;
Another object of the application is to provide the process for treating waste liquor in the dry reducing sugar technique of a kind of melon, higher removal efficiency is had to the organism of waste liquid, ammonia nitrogen, solid substance, the up to standard middle water obtained after treatment, COD clearance is at 300mg/L, directly can be used as sizing mixing of production process and use water, realize secondary waste water utilizing, decrease the overall wastewater discharge of system, energy-conserving and environment-protective.
To achieve these goals, technical scheme of the present invention is:
The treatment system of waste liquid in the dry reducing sugar production process of a kind of melon, waste tank is connected with diversion trench one end by pipeline, the bottom of the bottom of diversion trench and three grades of aerobic anaerobic systems is through, the top of these three grades of aerobic anaerobic system last step Aerobic Ponds is connected with biological fluidized bed, the biological fluidized bed the other end is connected with ceramic membrane waste disposal plant by pipeline (pipeline is provided with slush pump), and the mud bottom biological fluidized bed, ceramic membrane waste disposal plant, three grades of aerobic anaerobic systems is separated outlet and is all connected to active sludge separation concentration device.
Every grade of aerobic anaerobic system comprises a top through the mutually through anaerobic pond of adjustable overfalling weir and Aerobic Pond; Between adjacent level aerobic anaerobic system, bottom is through, by adjustment overfalling weir Altitude control anaerobic pond elevation of water surface, water flow and anaerobic pond action time.
Wherein, between one-level Aerobic Pond and one-level anaerobic pond, between secondary Aerobic Pond and secondary anaerobic pond, be equipped with sludge recirculation system; Present bottom third stage Aerobic Pond and be separated outlet-inclined impeller vane 15 to mud
othe gradient, and water outlet is arranged on the position of third stage Aerobic Pond near top.
In the anaerobic pond of every grade of aerobic anaerobic system, all agitator is set; Arrange equal aerating apparatus bottom Aerobic Pond, aerating apparatus connects temperature controlling system.
A treatment process for waste liquid in the dry reducing sugar production process of melon, step is as follows:
(1) waste liquid of poor liquid storage tank storage is under the effect of pump, inputs the bottom of three grades of aerobic anaerobic systems through diversion trench;
(2) in three grades of aerobic anaerobic systems, sewage, after three anaerobism, aerobic treatment, inputs biological fluidized bed, the process of ceramic membrane waste disposal plant successively from the water outlet at last step aerobic anaerobic system top;
In this step, the adjustable overfalling weir of sewage in every grade of aerobic anaerobic system between anaerobic pond and Aerobic Pond inputs to adjacent Aerobic Pond from anaerobic pond; And the aerobic anaerobic system of next stage is input to from the through channel bottom the aerobic anaerobic system of adjacent level;
At the agitator of the intermittent operation that each anaerobic pond is arranged, to promote that in poor liquid, organism fully contacts with anaerobion, for anaerobion provides abundant nutrition, promote the growth and breeding of anaerobion, also accelerate organic decomposition simultaneously;
Bottom each Aerobic Pond, all arrange aerating apparatus, aerating apparatus connects temperature control system, homo(io)thermism in the pond that can ensure Various Seasonal;
(3) sewage after the process of ceramic membrane waste disposal plant reaches Treated sewage reusing standard, returns the step of sizing mixing of reducing sugar production technique, uses water for sizing mixing of reducing sugar production process; The sludge outlet of mud through bottom that three grades of aerobic anaerobic systems, biological fluidized bed, ceramic membrane waste disposal plant produce all is delivered to active sludge separation concentration device and carries out sludge condensation, drying treatment;
One-level Aerobic Pond and one-level anaerobic pond, between secondary Aerobic Pond and secondary anaerobic pond, be provided with sludge reflux pump, make mud under denitrifying bacteria effect, utilize the organism in sewage to make carbon source, by a large amount of NO brought in internal recycle mixed solution by backflow
3-N and NO
2-N is reduced to N
2, and discharge into the atmosphere, thus reach the object of denitrogenation.Should note in concrete operations: (1) keeps quantity of reflux constant; (2) keep excess sludge discharge amount constant; (3) reflux ratio and quantity of reflux all need to adjust at any time.Stablize sludge back flow quantity as far as possible during operation, can do according to the height of Aerobic Pond sludge blanket and regulate among a small circle, by the height of adjustment Aerobic Pond sludge blanket, control quantity of reflux constant.
The present invention has the following advantages:
(1) adopt three grades of aerobic anaerobic systems, biological fluidized bed combination treatment modes, have higher removal efficiency for the organism of waste liquid, ammonia nitrogen, solid substance;
(2) the dry operation of sizing mixing of melon is back to after the waste water produced in cold type cooling step in melon dry reducing sugar production process mixes with the up to standard middle water after the process of liquid waste treatment system ceramic membrane, decrease the total amount discharge of system waste liquid, alleviate the environmental protection pressure of follow-up workshop section.
(3) the sludge condensation process that produces the third stage Aerobic Pond of three grades of aerobic anaerobic systems, biological fluidized bed, ceramic membrane waste disposal plant of active sludge separation concentration device, improves utilising efficiency.
(4) the process water of ceramic membrane waste disposal plant on the one hand can direct reuse, waste water on the other hand after wherethrough reason also can be used as the pretreatment technology of RO desalting treatment, greatly reduce cost of water treatment simultaneously, compare with other organic membrane, mineral membrane, have membrane flux large, can recoil, the advantage such as unattended operation.
In sum, the production process of this liquid waste treatment system and reducing sugar organically combines, and forms rounded system, realizes unattended operation; The up to standard middle water obtained after treatment, COD clearance, at 300mg/L, directly can be used as sizing mixing with water of production process, realize secondary waste water utilizing, and compared to traditional technology, tap water consumption reduces 85%.
Accompanying drawing explanation
The dry reducing sugar technique of Fig. 1 melon produces the processing technological flow of waste liquid;
The dry reducing sugar technological process of production of Fig. 2 melon and tank liquor processing flow chart;
The explanation of Main Reference Numerals in accompanying drawing: poor liquid storage tank-1, pump 2-1, 2-2, one-level anaerobic pond 3, one-level Aerobic Pond 4, aerating apparatus 5-1, 5-2, 5-3, secondary anaerobic pond 6, secondary Aerobic Pond 7, three grades of anaerobic ponds 8, three grades of Aerobic Ponds 9, agitator 10, sludge reflux pump 11, blower fan 12, water outlet 13, biological fluidized bed 14, mud is separated outlet 15, 25, 18, ceramic membrane waste disposal plant 16, to purify waste water discharge outlet 17, active sludge separation concentration device 19, dewatered sludge discharge outlet 20, diversion trench 21, adjustable overfalling weir 22-1, 22-2, 22-3.
Fig. 3 is embodiment 1 each region water outlet COD(mg/L) Changing Pattern histogram;
Fig. 4 is embodiment 1 system each region water outlet denitrification effect graphic representation;
Fig. 5 is embodiment 1 each region water outlet phosphor-removing effect schematic diagram.
Embodiment
With reference to the accompanying drawings, patent of the present invention is described further.
The dry reducing sugar technique of Fig. 1 melon produces the processing technological flow of waste liquid; The dry reducing sugar technological process of production of Fig. 2 melon and tank liquor processing flow chart.
As shown in Figure 1, the treatment system of waste liquid in the dry reducing sugar production process of a kind of melon, waste tank 1 is connected with diversion trench 21 by pipeline, the bottom of the bottom of diversion trench 21 and three grades of aerobic anaerobic systems is through, to reduce the impact of poor liquid to anaerobic pond, increase the reaction times of poor liquid and anaerobion, improve treatment effect.The third stage Aerobic Pond 9 top water outlet 13 of these three grades of aerobic anaerobic systems is connected with biological fluidized bed 14, biological fluidized bed 14 the other end is connected with ceramic membrane waste disposal plant 16 by pipeline, and the mud bottom biological fluidized bed 14, ceramic membrane waste disposal plant 16, three grades of Aerobic Ponds 9 is separated outlet 15,25,18 and is all connected to active sludge separation concentration device 19.Third stage Aerobic Pond 9 water outlet adopts high-order water outlet, its object is to reduce organic content in water outlet, thus reduces the processing load of biological fluidized bed 14.
Every grade of aerobic anaerobic system comprises a top through the mutually through anaerobic pond of adjustable overfalling weir and Aerobic Pond; Between adjacent level aerobic anaerobic system, bottom is through.Namely, between one-level anaerobic pond 3 and one-level Aerobic Pond 4, between secondary anaerobic pond 6 and secondary Aerobic Pond 7, between three grades of anaerobic ponds 8 and three grades of Aerobic Ponds 9, adjustable overfalling weir 22-1,22-2,22-3 are set respectively, anaerobic pond water flow and waste liquid action time at every grade of anaerobic pond can be controlled by adjustment overfalling weir height, keep anaerobic pond water level at certain altitude simultaneously, promote anaerobion growth.Therefore, between the aerobic anaerobic system of adjacent level, sewage is all first enter anaerobic pond from bottom, then from top, adjustable overfalling weir flow to Aerobic Pond at the same level, add the stroke of sewage in treatment system, increase the action time of sewage and microorganism, promote organic decomposition.
The agitator of intermittent operation is all set in the anaerobic pond of every grade of aerobic anaerobic system, promote that poor liquid organism fully contacts with anaerobion, for anaerobion provides abundant nutrition, promote the growth and breeding of anaerobion, also accelerate organic decomposition simultaneously.Bottom one-level Aerobic Pond 4, secondary Aerobic Pond 7 and three grades of Aerobic Ponds 9, aerating apparatus 5-1,5-2,5-3 are set respectively, aerating apparatus is connected to blower fan 12 simultaneously, temperature control unit is had at blower fan leading portion, fan outlet temperature is made to remain at about 30 DEG C, its object is to Aerobic Pond conveying constant temperature oxygen at different levels, promote the rolling of Aerobic Pond sewage inside and Exchange of material and energy, be conducive to aerobic microbiological and be combined with organism, promote organic decomposition.
Between one-level Aerobic Pond 4 and one-level anaerobic pond 3, between secondary Aerobic Pond 7 and secondary anaerobic pond 6, be equipped with sludge recirculation system, make mud under denitrifying bacteria effect, utilize the organism in sewage to make carbon source, by a large amount of NO brought in internal recycle mixed solution by backflow
3-N and NO
2-N is reduced to N
2, and discharge into the atmosphere, thus reach the object of denitrogenation.Should note in concrete operations: (1) keeps quantity of reflux constant; (2) keep excess sludge discharge amount constant; (3) reflux ratio and quantity of reflux all need to adjust at any time.Stablize sludge back flow quantity as far as possible during operation, can do according to the height of Aerobic Pond sludge blanket and regulate among a small circle, by the height of adjustment Aerobic Pond sludge blanket, control quantity of reflux constant.15 are tilted in being separated outlet 18 to mud bottom third stage Aerobic Pond 9
othe gradient, and water outlet is arranged on the position of third stage Aerobic Pond near top, and such sludgd deposition, in bottom, is convenient to by mud discharging mouth 18, and the mud that system produces is flowed to active sludge separation concentration device 19 by pipeline.
The connection line of biological fluidized bed 14 and ceramic membrane waste disposal plant 16, waste tank 1 and the connection line of diversion trench 21 all arrange pump, for this section of system liquid conveying provides power.
A treatment process for waste liquid in the dry reducing sugar production process of melon, step is as follows:
(1) waste liquid of poor liquid storage tank 1 storage is under the effect of pump 2-1, inputs the bottom of three grades of aerobic anaerobic systems through diversion trench 21;
(2) in three grades of aerobic anaerobic systems, sewage, after three anaerobic ponds, Aerobic Pond process, inputs biological fluidized bed 14, ceramic membrane waste disposal plant 16 successively from the water outlet at last step aerobic anaerobic system top; In this step, the adjustable overfalling weir of sewage in every grade of aerobic anaerobic system between anaerobic pond and Aerobic Pond inputs to adjacent Aerobic Pond from anaerobic pond; And the aerobic anaerobic system of next stage is input to from the through channel bottom the aerobic anaerobic system of adjacent level;
(3) sewage after ceramic membrane waste disposal plant 16 processes reaches Treated sewage reusing standard, returns the step of sizing mixing of reducing sugar production technique, uses water for sizing mixing of reducing sugar production process; The third stage mud that well foster pond 9, biological fluidized bed 14, ceramic membrane waste disposal plant 16 produce is delivered to active sludge separation concentration device 19 through the sludge outlet separately and carries out sludge condensation, drying treatment, make dewatering rate reach 85 ~ 90%, reach the object of cleaner production;
Biological fluidized bed 14 adopts delayed time system, and sewage is 16-45 min in the biological fluidized bed residence time, increases microorganism and organism duration of contact, promotes growth of aerobic microorganisms, thus organic decomposition in promotion sewage.
Embodiment 1
In this embodiment, the stirrer rotating speed in one-level anaerobic pond 3 is 5 rpm, often runs 40 min and to stop transport 80 min;
Bottom every grade of Aerobic Pond, aerating apparatus connects 2 Fans, and flow control is at 20-500 m/min, and pressure general control is at 3500-20000 mmH
2o; Operating ambient temperature affects blower fan working condition, and blower design temperature is 20 DEG C, often raises 1 DEG C, and top hole pressure can decline 20 mmH
2about O.When summer temperature is 38 DEG C, top hole pressure will decline 360 mmH
2o.Should according to using on-the-spot particular case, setting fan parameter, considers the impact of temperature Change on fan outlet pressure, when blower fan makes land used day ultimate temperature T
maxduring >37 DEG C, by 20 mmH
2o/1 DEG C compensates inlet end pressure.
After aerating apparatus shuts down, 30 min open mud discharging mouth 18 valve, are transported in mud separation concentration device by slush pump.
In the use procedure of biological fluidized bed 14, first sand or hard coal, gac are filled into packing layer, as biofilm carrier.Open valve makes that waste water is bottom-up flows through casting bed and at carrier layer Uniform Flow, control waste water and present stabilization of fluidized, the equipment smooth running stage strengthens the contact area of unit time microbial film with waste water gradually, make oxygen supply full and uniform, and the structures utilizing filler boiling state to strengthen biological wastewater treatment process are formed.When structures at packing layer surface-area more than 3300 m
2/ m
3time, the microbial film that filler grows has partial exfoliation, and the mud produced that comes off is transported in active sludge separation concentration device 19 by outlet at bottom.Under normal operating condition, in casting bed, mixed genetic-neural network reaches 8000-40000 mg/L, the utilization ratio of oxygen more than 90%, according to test-results, when the empty bed residence time is 16-45 min, the clearance of BOD and nitrogen is all greater than 90%, now packing material size is 1mm, and rate of expansion is 100%, BOD
5load 16.6 kg/ (m
3d), this stage biological fluidized bed process efficiency is the highest, and it is best to nitrated in sewage, denitrogenation, dephosphorization function efficiency.
Above content is in conjunction with the further description of concrete preferred implementation to patent of the present invention, can not regard as patent of invention and specifically implement to be confined to these explanations above-mentioned.For patent person of an ordinary skill in the technical field of the present invention, under the prerequisite not departing from inventional idea of the present invention, some simple deduction or replace can also be made, all should be considered as the protection domain belonging to patent of the present invention.
Claims (6)
1. the treatment system of waste liquid in the dry reducing sugar production process of melon, it is characterized in that: waste tank (1) is connected with diversion trench (21) one end by pipeline, the bottom of diversion trench (21) and the bottom of multistage aerobic anaerobic system through, the top of this multistage aerobic anaerobic system last step Aerobic Pond is connected with biological fluidized bed (14), biological fluidized bed (14) the other end is connected with ceramic membrane waste disposal plant (16) by pipeline, biological fluidized bed (14), ceramic membrane waste disposal plant (16), mud bottom three grades of aerobic anaerobic systems is separated outlet and is all connected to active sludge separation concentration device (19),
Every grade of aerobic anaerobic system comprises a top through the mutually through anaerobic pond of adjustable overfalling weir and Aerobic Pond; Between adjacent level aerobic anaerobic system, bottom is through.
2. the treatment system of waste liquid in the dry reducing sugar production process of melon according to claim 1, it is characterized in that between one-level Aerobic Pond (4) and one-level anaerobic pond (3), between secondary Aerobic Pond (7) and secondary anaerobic pond (6), be equipped with sludge recirculation system.
3. the treatment system of waste liquid in the dry reducing sugar production process of melon according to claim 1, it is characterized in that third stage Aerobic Pond (9) bottom presents in the middle of two side direction downward-sloping, and water outlet is arranged on the position of third stage Aerobic Pond near top.
4. the treatment system of waste liquid in the dry reducing sugar production process of melon according to claim 1, is characterized in that comprising three grades of aerobic anaerobic systems.
5. the treatment system of waste liquid in the dry reducing sugar production process of melon according to claim 1, is characterized in that all arranging agitator in the anaerobic pond of every grade of aerobic anaerobic system; Arrange equal aerating apparatus bottom Aerobic Pond, aerating apparatus connects temperature controlling system.
6., based on the process for treating waste liquor of the treatment system of waste liquid in the dry reducing sugar production process of melon according to claim 1, it is characterized in that step is as follows:
The waste liquid that grain liquid storage tank (1) stores, under the effect of pump, inputs the bottom of three grades of aerobic anaerobic systems through diversion trench (21);
In three grades of aerobic anaerobic systems, sewage, after three anaerobism, aerobic treatment, inputs biological fluidized bed, ceramic membrane waste disposal plant (16) process successively from the water outlet at last step aerobic anaerobic system top; Wherein, the adjustable overfalling weir of sewage in every grade of aerobic anaerobic system between anaerobic pond and Aerobic Pond inputs to adjacent Aerobic Pond from anaerobic pond; And the aerobic anaerobic system of next stage is input to from the through channel bottom the aerobic anaerobic system of adjacent level;
After sewage after ceramic membrane waste disposal plant (16) process reaches Treated sewage reusing standard, the step of sizing mixing returning reducing sugar production technique is used as sizes mixing with water; The mud of the mud that three grades of aerobic anaerobic systems, biological fluidized bed, ceramic membrane waste disposal plants (16) produce through bottom is separated outlet and is all delivered to active sludge separation concentration device (19) and carries out sludge condensation, drying treatment.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011160603A1 (en) * | 2010-06-25 | 2011-12-29 | 可事托环保设备（上海）有限公司 | Multi-stage sewage treatment method and device with biological denitrification and dephosphorization |
| CN102826725A (en) * | 2012-09-20 | 2012-12-19 | 江苏艾特克环境工程有限公司 | Coal mine wastewater membrane treatment device and method |
| CN102863119A (en) * | 2012-09-19 | 2013-01-09 | 江南大学 | Method of treating landfill leachate |
| CN204281499U (en) * | 2014-10-16 | 2015-04-22 | 徐州工程学院 | The treatment system of waste liquid in the dry reducing sugar production process of melon |
-
2014
- 2014-10-16 CN CN201410547523.8A patent/CN104310586B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011160603A1 (en) * | 2010-06-25 | 2011-12-29 | 可事托环保设备（上海）有限公司 | Multi-stage sewage treatment method and device with biological denitrification and dephosphorization |
| CN102863119A (en) * | 2012-09-19 | 2013-01-09 | 江南大学 | Method of treating landfill leachate |
| CN102826725A (en) * | 2012-09-20 | 2012-12-19 | 江苏艾特克环境工程有限公司 | Coal mine wastewater membrane treatment device and method |
| CN204281499U (en) * | 2014-10-16 | 2015-04-22 | 徐州工程学院 | The treatment system of waste liquid in the dry reducing sugar production process of melon |
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