CN205576158U - Two stage of solid -liquid anaerobic fermentation device - Google Patents

Two stage of solid -liquid anaerobic fermentation device Download PDF

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Publication number
CN205576158U
CN205576158U CN201620428589.XU CN201620428589U CN205576158U CN 205576158 U CN205576158 U CN 205576158U CN 201620428589 U CN201620428589 U CN 201620428589U CN 205576158 U CN205576158 U CN 205576158U
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liquid
fermentation
reactor
solid
methane
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CN201620428589.XU
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Chinese (zh)
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杜连柱
张克强
梁军锋
张蕾
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Agro Environmental Protection Institute Ministry of Agriculture
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Agro Environmental Protection Institute Ministry of Agriculture
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel

Abstract

The utility model relates to a two stage of solid -liquid anaerobic fermentation device, produce sour fermentation reactor, liquid product methane reactor, produce sour zymotic fluid collection tank, natural pond liquid collection tank, circulation heating device, marsh gas counter, mixer, sewage pump, level sensor, temperature sensor and automatic control cabinet including the solid. The device provided by the utility model well liquid phase fermenting installation is small, the intensification is fast, it is low to keep warm, consume energy, little, the small investment of plant area is compared with traditional wet -type fermentation, but saving investment is about 20%, and the resourceful treatment who is applicable to organic waste such as pig manure, straw, the incomplete body of vegetables, kitchen garbage and municipal refuse utilizes, characteristics such as water conservation, the emission of nos natural pond liquid, no secondary pollution, substrate conversion rate and volume factor of created gase height moreover.

Description

A kind of solid-liquid two benches anaerobic ferment devices
Technical field
This utility model belongs to biogas fermentation field, relates to a kind of solid-liquid two benches anaerobic ferment devices.
Background technology
China is the country that organic waste generation amount is maximum in the world.Annual agricultural crop straw yield reaches 7.7 Hundred million tons, Amount of poultry excrements about 2,500,000,000 tons, but harmless treatment is extremely low with resource utilization, and about 55.6% Straw directly burned or arbitrarily abandoned, the livestock and poultry feces of more than 90% is unprocessed is directly discharged to ring around In border, making " resource " to become " polluter ", containment crop straw burning and improvement animal waste pollute extremely urgent, Producing methane through anaerobic fermentation is the effective way that above-mentioned agricultural organic waste processes with recycling.
The sorting technique that anaerobic fermentation processes technique is many, according to different sorting techniques, anaerobic fermentation method quilt It is divided into different fermentation technologys.Difference according to the reactor residing for fermentation stage is classified, and can be divided into two Phase fermentation technology and single-phase fermentation technology.Different (such as solid holdup, fermentation temperature, raw material structure according to fermentation condition Become) can be divided three classes: it is divided into wet type, high concentration and dry fermentation by solid holdup;Can divide by running temperature For hot fermentation, mesophilic digestion and normal temperature fermentation;Constitute by raw material and single fermenting raw materials and many raw materials can be divided into mix Close fermentation.
The most most widely used is wet type anaerobic fermentation, have the disadvantage that 1, water resource waste is serious, Biogas slurry generation amount is big, easily produces secondary pollution problems, as a example by pig manure, often enters 1 ton of fermented feed liquid, will Producing about 0.74 ton of biogas slurry, subsequent treatment difficulty, the most directly discharge, seriously polluted;2, in wet type individual event In anaerobic ferment devices, acidogenic fermentation and methane phase fermentation carry out in same reactor, cause acidogenic fermentation and Methane phase is uneven, and biogas efficiency is produced in impact;When 3, using wet type anaerobic digestion techniques, for improving aerogenesis effect Rate, often with the biogas that produces as fuel, heats huge installation for fermenting, and biogas in-fighting is relatively big, fall Low economic benefit;4, during the fermentation of organic wastes such as agricultural crop straw, feces of livestock and poultry produces biogas production process, Input and output material is difficult, floating and the problem such as crust is the most serious.
Dry type fermentation process is generally batch fermentation, and gas production is unstable, affects follow-up biogas utilization;Fermented In journey, organic loading is high, and hydrolysis is produced acid and is acidified (acidogenic fermentation) speed and methane phase speed differs greatly, Easily produce acid accumulation, methane phase fermentation is produced suppression;Degradation effect of organic compound, biogas conversion ratio are low.
According to retrieval, finding the patent documentation the most relevant to the application, specific disclosure is as follows:
1, CN101130747A one way of life rubbish substep technology for methanation processing, it is characterised in that include following Step: the anaerobic reactor of two series connection is set, to the organic substance in rubbish in first anaerobic reactor Be hydrolyzed product acid, and the product of formation passes through the percolate charging as second anaerobic reactor, and is converted into Methane, then recharges landfill yard again by its water outlet.
2, CN104478172A diphasic anaerobic tubular membrane bioreactor: up-flow combined type acidogenic reactor Couple with the formula methane-producing reactor of being thoroughly mixed;It is thoroughly mixed formula methane-producing reactor by circulating pump and tubular membrane Assembly couples;The water outlet port of tubular membrane component is divided into the product mouth of a river and circulation port, wherein circulation port be thoroughly mixed Formula methane-producing reactor couples;Flow up combined type acidogenic reactor, be thoroughly mixed formula methane-producing reactor and tubular type Membrane module is provided with pH electrode and conductivity electrode, pH electrode and conductivity electrode coupled reaction device and controls system System;The methane outlet connection being thoroughly mixed formula methane-producing reactor has gas metering system, gas metering system to divide For moisture trap and gas flowmeter, the aerogenesis being thoroughly mixed formula methane-producing reactor is connected to moisture trap, The gas outlet of moisture trap is connected to gas flowmeter, and the liquid outlet of moisture trap is coupled by pipeline To being thoroughly mixed formula methane-producing reactor.
Described patent and the difference of above-mentioned patent:
1, the device described in a kind of solid-liquid two benches anaerobic ferment devices is different from described in CN101130747A vertical Formula hydrolysis acidogenic reactor, uses horizontal reacting storehouse, makes dry sweat input and output material convenient.
2, it is different from what CN101130747A single solid acidogenic reactor was connected with liquid methane-producing reactor Design, uses 4-6 solid acidogenic reactor in parallel, then connects with liquid methane-producing reactor in described patent, Avoid dry fermentation batch fed and cause the problem that aerogenesis is unstable, affect later use.
3, the solid acidogenic reactor of CN101130747A it is different from, the solid acid-producing in described patent It is provided with aeration tube bottom storehouse, air can be passed through at earlier fermentation and carry out short-term aerobic fermentation, increase fermentation temperature, Carry out anaerobic digestion again, fermenting speed can be accelerated to a certain extent, again can be by exposing after solid acidogenic fermentation Gas, accelerates dewatering speed, and follow-up Fertilizer Transformed utilizes.
4, the acidogenic reactor in CN104478172A is applicable to the process of high and low concentration organic wastewater, and this is specially Acidogenic reactor described in profit is then for solid content consolidating more than 20% such as pig manure, straw, organic garbage of city The biogas fermentation of body garbage, the most different at the aspect such as type of reactor, structure.
5, the formula that the is thoroughly mixed methane-producing reactor in CN104478172A uses and washes away tubular membrane component, is suitable for Methane-producing reactor in the treatment of Organic Wastewater that particle content is low, described utility model is suitable for producing acid and sends out Ferment percolate height particle content.
6, being different from CN101130747A and CN104478172A, described patent contains automatic control system, Detail automatic control process.
7, be different from CN101130747A and CN104478172A, described patent by solid acidogenic fermentation and Methane phase fermentation coupling, it is achieved that biogas slurry zero-emission, it is to avoid follow-up biogas slurry treatment.
Utility model content
In place of the purpose of this utility model is to overcome the deficiencies in the prior art, it is provided that a kind of solid-liquid two benches anaerobism Installation for fermenting, realizes hydrolysis by the Proper Match of acidogenic fermentation and methane phase fermentation reaction and produces acid and methane phase mistake The balance of journey, improves anaerobic fermentation efficiency.
This utility model realizes the technical scheme of purpose:
A kind of solid-liquid two benches anaerobic ferment devices, including solid acidogenic fermentation reactor, the reaction of liquid methane phase Device, acidogenic fermentation liquid collecting tank, biogas slurry collecting tank, circulating heater, biogas quantifier, blender, dirt Water pump, liquid level sensor, temperature sensor and automatic control cabinet;
Described solid acidogenic fermentation reactor includes a horizontal dry fermentation reaction storehouse, installs biogas slurry on warehouse top and returns Spread liquid device, aerated conduit is installed bottom warehouse, acidifying solution diafiltration sieve plate, storehouse are installed in the both sides of warehouse Being provided with acidifying solution outlet bottom body, the gas outlet on warehouse top connects biogas quantifier by pipeline;
The acidifying solution outlet in dry fermentation reaction storehouse connects acidogenic fermentation liquid collecting tank inlet by a sewage pump, sends out Ferment liquid collecting tank liquid outlet connects liquid methane-producing reactor inlet, and liquid methane-producing reactor liquid outlet connects Biogas slurry collecting tank, the outlet of biogas slurry collecting tank is connected with top, dry fermentation reaction storehouse biogas slurry liquid distributor, liquid methane phase Reactor gas outlet connects biogas quantifier;Liquid methane-producing reactor connects a circulating heater, One blender is installed in liquid methane-producing reactor;
A liquid level sensor, sensor output letter it is respectively mounted in acidogenic fermentation liquid collecting tank and biogas slurry collecting tank Number give automatic control cabinet, automatic control cabinet gather liquid level signal to sewage pump;Pacify in liquid methane-producing reactor Filling a temperature sensor, temperature sensor output signal is to automatic control cabinet, automatic control cabinet collecting temperature signal To recirculation heater.
And, described solid acidogenic fermentation reaction warehouse dischargeable capacity 60L, reactor quantity is 4-6;Liquid Methane phase fermentation reactor is modified model CSTR reactor, dischargeable capacity about 100L.
And, described horizontal dry fermentation reaction storehouse with liquid methane phase fermentation reactor by dischargeable capacity ratio is 2.4:1 proportioning.
And, described liquid methane phase fermentation average volume factor of created gase is 1.2L/ (L d), and methane average content is The average removal rate of 62.5%, COD reaches 67.6%.
And, the sweat of described whole device, in addition to input and output material, realizes unmanned behaviour by automatic control system Making, solid acidogenic fermentation runs at normal temperatures, and the fermentation of liquid methane phase runs at 35 ± 1 DEG C.
Advantage of the present utility model and good effect be:
1, product acid and two processes of methane phase are divided by the solid-liquid two benches anaerobic ferment devices that this utility model provides Stage is carried out, sour with methane phase is carried out stage by stage, methane phase stage biogas slurry is back to acidogenic reactor etc. by producing Method, it is to avoid the suppression that acid accumulation causes, beneficially anaerobic fermentation stable operation;Solid is produced acid send out Two microbial reaction processes of ferment and the fermentation of liquid methane phase separate, and create optimal metabolism bar for different microorganisms Part, improves anaerobic digestion efficiency, by solid acidogenic fermentation reactor and liquid methane-producing reactor efficient coupling (effective proportioning between dischargeable capacity and quantity), it is achieved that acidogenic fermentation and methane phase fermentation, improves product Biogas efficiency.
2, the device that this utility model provides is furnished with aerobic aeration device at acidogenic fermentation reactor, disappears in anaerobism Change the starting stage to improve the reaction temperature of acidogenic fermentation early stage by timing aeration, shorten fermentation time, sending out Ferment can accelerate dehydrate by aeration after terminating.
3, the device that this utility model provides is back to solid by adjustment liquid methane phase fermentation biogas slurry and produces sour sending out The frequency of ferment reactor and capacity of returns, and acidogenic fermentation percolate is in the timing cycle pouring of acidogenic fermentation reactor Wash, promote that acidogenic fermentation is carried out, use multiple solid acidogenic reactor in parallel, then react with 1 methane phase Device is connected, and overcomes conventional dry fermentation gas instability problem.
4, the device that this utility model provides is while producing clean energy resource biogas, and the biogas residue after fermentation is aqueous Rate is low, can be directly as fertilizer for agricultural production, it is to avoid later stage dehydration, the operation such as be dried.Detest with wet type Oxygen digestion is compared, and uses solid-liquid two benches anaerobic fermentation not have biogas slurry to discharge, and every 1 ton of fermented feed liquid reduces discharging 0.74 Ton biogas slurry, has saved subsequent treatment expense;Use solid-liquid two benches anaerobic fermentation to process pig farm and do clear excrement, process Feces per ton saves 2.1 tons of water.
5, in the device that this utility model provides, liquid phase installation for fermenting volume is little, quick heating, good heat insulation, consumption Can be low;Plant area is little, small investment, compared with traditional wet fermentation, can reduce investment outlay about about 20%, It is applicable to the recycling treatment of the organic wastes such as pig manure, straw, vegetable residuum, changing food waste and municipal refuse Utilize, have water saving, energy-conservation, without features such as biogas slurry discharge, non-secondary pollutions, and substrate conversion efficiency and appearance Long-pending factor of created gase is high.
Accompanying drawing explanation
Fig. 1 is this utility model solid-liquid two benches anaerobic fermentation system schematic diagram;
Fig. 2 is this utility model solid-liquid two benches anaerobic fermentation effect.
Detailed description of the invention
This utility model method is described below by specific embodiment.Unless stated otherwise, this utility model Technological means used by is method known in those skilled in the art.It addition, embodiment is interpreted as Illustrative, and unrestricted scope of the present utility model, spirit and scope of the present utility model is only by claim Book is limited.
A kind of solid-liquid two benches anaerobic ferment devices, as it is shown in figure 1, include solid acidogenic fermentation reactor 1 (4-6 Set), liquid methane-producing reactor 5, acidogenic fermentation liquid collecting tank 9, biogas slurry collecting tank 10, circulating-heating dress Put 6, biogas quantifier 15, blender 8, sewage pump 11, liquid level sensor 12, temperature sensor 7 and Automatic control cabinet 13.
Described solid acidogenic fermentation reactor includes horizontal dry fermentation reaction storehouse (or the most box anaerobic dry fermentation Reactor), biogas slurry backflow liquid distributor 4 is installed on warehouse top, aerated conduit 2 is installed bottom warehouse, Acidifying solution diafiltration sieve plate 3 is installed in the both sides of warehouse, and the gas outlet on warehouse top is connected by biogas pipeline 14 Biogas quantifier.Acidifying solution outlet bottom fermentation reactor connects acidogenic fermentation liquid collecting tank by a sewage pump Inlet, fermentation liquid collecting tank liquid outlet connects liquid methane-producing reactor (CSTR reactor) inlet, Liquid methane-producing reactor liquid outlet connects biogas slurry collecting tank, and liquid methane-producing reactor gas outlet connects biogas meter Measuring device.For liquid heating in liquid methane-producing reactor, liquid methane-producing reactor connects a circulation Heater.One blender is installed in liquid methane-producing reactor, it is possible to be effectively improved reaction efficiency.
In order to realize automatically controlling, in acidogenic fermentation liquid collecting tank and biogas slurry collecting tank, it is respectively mounted a liquid level passes Sensor, sensor outputs signal to automatic control cabinet, automatic control cabinet gather liquid level signal to sewage pump 11, 16,17 and 18, open and close sewage pump.One temperature sensor is installed in liquid methane-producing reactor, Temperature sensor output signal is to automatic control cabinet, and automatic control cabinet collecting temperature signal is to recirculation heater.
Automatic control cabinet also include for control acidogenic fermentation liquid collect, methane-producing reactor biogas slurry discharge, stirring, Biogas slurry is back to acidogenic reactor, acidogenic fermentation liquid enters automatically controlling of the processes such as methane-producing reactor.Above-mentioned Mention that storehouse formula anaerobic dry fermentation reactor can be found in the reactor disclosed in (CN104371915A).
The concrete operation method of employing said apparatus is:
When fermentation starts, difference organic waste and inoculum being mixed in proportion, the raw material mixed is by living Dynamic door enters the 1 horizontal dry fermentation reaction storehouse of set, closes horizontal dry fermentation reaction door, start by set date blast aeration System, under aerobic microbiological effect to reactor in material heat, close aerating system start anaerobic fermentation, Acidifying solution timing (1-2 times/day) that acidogenic fermentation produces pumps into acidogenic fermentation liquid collecting tank postprecipitation, now produces Biogas slurry in methane fermentation reactor be back to after pumping into biogas slurry collecting tank solid acidogenic fermentation reaction warehouse (1-2 time/ My god), the acidifying solution in acidogenic fermentation liquid collecting tank pumps into methane-producing reactor after precipitation and ferments, so Circulation, until fermentation ends.At first 10-15 days of fermentation, for accelerating acidogenic fermentation, control to produce acid every day and send out Ferment liquid to collecting tank is then refluxed for acidogenic fermentation reaction warehouse process 2-3 time.Ferment after starting every 6-10 days, Operate another set of horizontal dry fermentation reaction storehouse as stated above.For each dry fermentation reaction storehouse, run 35-40 Terminate fermentation after it, close reaction warehouse biogas passage and percolate valve, open gas valve, with blower system Aeration in solid acidogenic fermentation reaction warehouse, each 10-15 minute, number of times determined according to practical situation, 2-3 After it, material after fermentation in reaction warehouse is discharged, filler again, rerun.
Sweat, in addition to input and output material, realizes unattended by automatic control system, and solid acidogenic fermentation is often Temperature is lower to be run, and the fermentation of liquid methane phase runs at 30-35 DEG C.
Main device: solid acidogenic fermentation reaction warehouse, dischargeable capacity 60L, reactor quantity is 4;Liquid Methane phase fermentation reactor is modified model CSTR reactor, dischargeable capacity 105L.
Fermentation raw material: clear excrement and corn straw are done in pig farm, pig manure stalk is than for 2:1, and inoculum is 25%.
Sweat: have four solid acidogenic fermentation reactors (horizontal dry fermentation reaction storehouse), fill material About 30kg, uses batch to run.It is first filled with running 1# reactor, after 1# reactor runs 10 days Filling and run 2# reactor, run sequentially into 4# reactor, discharging is also after filler 40 days for each reactor Fill fresh material, such iterative cycles.CSTR reactor biogas slurry capacity of returns is 25%, refluxes interval time 24h.Methane phase fermentation uses mesophilic digestion, and temperature controls at 35 ± 1 DEG C, and hydraulic detention time is 4 days, Have a rest stirring, stir 10min, 60 turns/min of agitation revolution per hour.
Solid produces acid and liquid methane phase coupling process: four reactor acidifying percolates are collected at acidifying solution every day In-tank mixing precipitates, and CSTR reactor biogas slurry is back to solid acidogenic fermentation storehouse, so after pumping into biogas slurry temporary storage tank Rear acidifying solution pumps into CSTR reactor to carry out producing biogas fermentation, and overall process automatically controls.
Result shows:
(1) solid produces acid digestion phase raw material TS, VS average removal rate and is respectively 43.0 and 47.7%, solid Acidogenic reactor amount in per day term is 15.8L, and average methane content is 32.3%;
(2) solid acidogenic fermentation reactor is four groups, with liquid methane phase fermentation reactor by dischargeable capacity ratio For 2.4:1 proportioning, it is achieved solid produces the efficient coupling of acid digestion and methane phase digestion, two benches anaerobic fermentation has There is good operational effect, and discharge without biogas slurry;
(3) liquid methane phase fermentation average volume factor of created gase is 1.2L/ (L d), and methane average content is 62.5%, The average removal rate of COD reaches 67.6%.

Claims (5)

1. a solid-liquid two benches anaerobic ferment devices, it is characterised in that: include solid acidogenic fermentation reactor, liquid methane-producing reactor, acidogenic fermentation liquid collecting tank, biogas slurry collecting tank, circulating heater, biogas quantifier, blender, sewage pump, liquid level sensor, temperature sensor and automatic control cabinet;
Described solid acidogenic fermentation reactor includes a horizontal dry fermentation reaction storehouse, biogas slurry backflow liquid distributor is installed on warehouse top, aerated conduit is installed bottom warehouse, acidifying solution diafiltration sieve plate is installed in the both sides of warehouse, being provided with acidifying solution outlet bottom warehouse, the gas outlet on warehouse top connects biogas quantifier by pipeline;
The acidifying solution outlet in dry fermentation reaction storehouse connects acidogenic fermentation liquid collecting tank inlet by a sewage pump, fermentation liquid collecting tank liquid outlet connects liquid methane-producing reactor inlet, liquid methane-producing reactor liquid outlet connects biogas slurry collecting tank, the outlet of biogas slurry collecting tank is connected with top, dry fermentation reaction storehouse biogas slurry liquid distributor, and liquid methane-producing reactor gas outlet connects biogas quantifier;Liquid methane-producing reactor connects a circulating heater, a blender is installed in liquid methane-producing reactor;
Being respectively mounted a liquid level sensor in acidogenic fermentation liquid collecting tank and biogas slurry collecting tank, sensor outputs signal to automatic control cabinet, and automatic control cabinet gathers liquid level signal to sewage pump;Installing a temperature sensor in liquid methane-producing reactor, temperature sensor output signal is to automatic control cabinet, and automatic control cabinet collecting temperature signal is to recirculation heater.
Solid-liquid two benches anaerobic ferment devices the most according to claim 1, it is characterised in that: described solid acidogenic fermentation reaction warehouse dischargeable capacity 60L, reactor quantity is 4-6;Liquid methane phase fermentation reactor is modified model CSTR reactor, dischargeable capacity about 100L.
Solid-liquid two benches anaerobic ferment devices the most according to claim 1, it is characterised in that: described horizontal dry fermentation reaction storehouse and liquid methane phase fermentation reactor by dischargeable capacity ratio for 2.4:1 proportioning.
Solid-liquid two benches anaerobic ferment devices the most according to claim 1, it is characterised in that: described liquid methane phase fermentation average volume factor of created gase is 1.2L/ (L d), and methane average content is 62.5%, and the average removal rate of COD reaches 67.6%.
Solid-liquid two benches anaerobic ferment devices the most according to claim 1, it is characterized in that: the sweat of described whole device is in addition to input and output material, realized unattended by automatic control system, solid acidogenic fermentation runs at normal temperatures, and the fermentation of liquid methane phase runs at 35 ± 1 DEG C.
CN201620428589.XU 2016-05-12 2016-05-12 Two stage of solid -liquid anaerobic fermentation device Expired - Fee Related CN205576158U (en)

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