CN103102011B - Anaerobic bio-enhancement treatment method for cellulose ethanol wastewater - Google Patents
Anaerobic bio-enhancement treatment method for cellulose ethanol wastewater Download PDFInfo
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Abstract
The present invention relates to an anaerobic bio-enhancement treatment method for cellulose ethanol wastewater, wherein the method is used for treatment of high concentration salt-containing organic wastewater during an ethanol production process adopting corn straws and other plant fiber as raw materials. According to the method, a two stage anaerobic treatment process is performed on cellulose ethanol wastewater, wherein a salt-resistant dominant strain is regularly poured into a first stage anaerobic tank to carry out bio-enhancement so as to reduce sulfates in the wastewater into hydrogen sulfide gas, and a sludge reflux manner is adopted to adjust concentrations of inorganic salts and pollutants in the influent so as to meet requirements of the anaerobic biological treatment process, such that high concentration organic matters in the wastewater are converted into biogas so as to reduce inorganic salt content in the wastewater and easily achieve the follow-up biochemistry treatment purpose. In addition, the method has advantages of low investment and low operation cost.
Description
Technical field
The present invention relates to a kind of anaerobe enhanced processing method of cellulose ethanol waste water, for the processing take vegetable fibres such as maize straws as raw material production ethanol process middle and high concentration salt-containing organic wastewater.
Background technology
Along with the general requirement of aggravation, recycling economy and the minimizing carbon emission of the worsening shortages of global fossil energy, environmental pollution, the exploitation of renewable energy source has become the theme in these epoch, and is one of important channel of renewable energy source exploitation take vegetable fibres such as maize straw, Chinese sorghum straws as raw material production cellulose ethanol.
Cellulose ethanol is normally take vegetable fibres such as maize straw, Chinese sorghum straws as raw material, obtain high purity ethanol by steaming the techniques such as quick-fried pre-treatment, cellulase hydrolysis, saccharifying enzyme fermentation, ethanol rectifying and dehydration, and mix production process of alcohol products in gasoline component, as clean fuel for vehicle.In its production process, because most hemicellulose in raw material (C5 sugar), xylogen can not be utilized, add the by product such as acetic acid, glycerine, lactic acid, furfural of association in process, make the suspended substance and the dissolved organic matter that in the final mash by discharge at the bottom of ethanol distillation tower, contain high concentration.Simultaneously, for improving cellulosic hydrolysis efficiency in stalk, alcohol concn in fermented liquid, alcohol product yield and the process of reduction energy consumption, the consideration of zymin consumption, steam quick-fried pre-treatment carries out often under acidic conditions, after fibrous material being flooded with more than 1% sulfuric acid in advance, steam quick-fried pre-treatment, to reach the object of Mierocrystalline cellulose weave construction in effective destruction stalk, and the sulfuric acid that this process adds and for follow-up hydrolysis, the sodium hydroxide (sheet alkali) adding with adjusting in fermenting process is present in ethanol distillation tower fermentation liquid with the form of inorganic salt the most at last, cause cellulose ethanol waste water on the basis of containing high-enriched organics, there is again the character of high saliferous.Through detecting all sidedly and dissecting, cellulose ethanol waste water is mainly derived from ethanol distillation tower fermentation liquid, and its principal character is: insoluble solid object height, be about 5%, and be mainly the xylogen that particle diameter is fine, solid-liquid is not easily separated; Temperature is high, is about 95 ℃; Colourity is large, is acid, and pH value is 5 left and right; COD approximately 130,000 mg/L, are mainly solvability wood sugar, glycerine, acetic acid, volatile phenol, lactic acid, xylogen (poly-ring aromatic compounds), furfural and various fermentation intermediate product; BOD
5/ COD=0.5～0.55, wherein bio-refractory thing is mainly aromatics; Inorganic salt content is about more than 2%, take sodium sulfate as main, and sulfate radical approximately 1%.Inorganic salt, sulfate radical, acetic acid, furfural, SS and xylogen etc. in waste water have serious restraining effect to conventional biological process processing.
The high-concentration sewage producing for cellulose ethanol production process, the main treatment process adopting is that high-concentration sewage is carried out to anaerobic treatment at present, under anaerobic, the high-enriched organics in waste water being changed into biogas (methane, carbon dioxide mix gas) fully utilizes.As CN01808115.0 and US6555350 all propose to adopt up-flow anaerobic sludge blanket (UASB) art breading sewage, inhibitory substance carboxylic acid in sewage, furfural, furans, phenol etc. are removed more than 80%, sewage after processing more than at least 5% is recycled, and produces biogas utilization by anaerobically fermenting simultaneously.But, this inventive method is only applicable to process neutral (not acid adding) and steams the cellulose ethanol waste water under quick-fried pre-treating process, be the waste water that inorganic salt content is lower, the processing of acidity being steamed to the treating high-concentration saline organic wastewater under quick-fried pre-treating process makes it to be not suitable for to adopt because of following two major causes.First, in ethanol distillation tower bottom fermentation mash after adopting acid steaming quick-fried, contain more than 2% inorganic salt, require (inorganic salt are controlled at below 1%) well beyond conventional anaerobically fermenting treatment process, under this situation, growth and the activity of anaerobically fermenting microbial bacteria obtain severe inhibition, even cause the failure of anaerobic treatment process; Secondly, sulfate radical content in waste water is about 10,000 mg/L, well beyond the required value (sulfate radical is controlled at below 5000mg/L) of anaerobically fermenting treatment process, under this situation, sulfate radical in waste water will be reduced to the hydrogen sulfide of high density by anerobe, thereby the methanation fermenting process of severe inhibition high-enriched organics, causes biogas production rate to decline rapidly, can not produce even at all biogas.The reference of method at present can to(for) the processing of this class treating high-concentration saline organic wastewater has two kinds, and first dilution process, dilutes it with hyposaline waste water, processes after making Pollutant levels meet biological process processing requirement.The feature of producing due to cellulose ethanol (stalk consumption is large, carry that radius is little, found the factory in rural area or suburb) determines that it is general without dilution water optionally around, and therefore dilution process method is difficult to be suitable for.It two is multiple-effect evaporation desalinations, first waste water is carried out to multiple-effect evaporation processing, and condensed water after treatment is carried out anaerobic-aerobic processing again.This method is used at present corn fermentation and produces fuel alcohol (or edible ethanol) field, although energy consumption is higher, the high-quality feed (DDGS) that can have a higher-value by recovery is compensated.And main ingredient in cellulose ethanol waste water is xylogen and various organic and inorganic salt, albumen equal size does not reach the requirement of DDGS product index, be difficult to reach high price and reclaim (only can work as general fuel utilization), adopt this treatment process significantly to increase the production cost of cellulose ethanol.
Based on above analysis, produce in technology, have economically larger advantage although adopt the acid cellulose ethanol that steams quick-fried pre-treating process, but also correspondingly bring larger treating high-concentration saline organic wastewater to process problem, still there is no at present economically viable treatment process.
Summary of the invention
The present invention is directed to the water quality characteristics of the acid cellulose ethanol waste water that steams quick-fried pre-treatment route, a kind of anaerobe enhanced processing method of cellulose ethanol waste water is proposed, waste water is adopted to two phase anaerobic treatment process, carry out biological reinforced to regularly adding anti-salt dominant bacteria in first paragraph anaerobic pond, sulfate reduction in waste water is changed into hydrogen sulfide, and the mode of sludge reflux by second segment anaerobic technique is adjusted inorganic salt and the Pollutant levels of water inlet, to meet the requirement of Anaerobic treatment technique, make the high-enriched organics in waste water change into biogas, to reach the object that reduces the inorganic salt content in waste water and contribute to follow-up biochemical treatment.
The detailed process of the anaerobe enhanced processing method of cellulose ethanol waste water of the present invention is: from mash at the bottom of the tower of cellulose ethanol distillation tower through solid-liquid separation and cool after, be mixed into first paragraph anaerobic pond with second segment anaerobic pond returned sluge liquid after treatment, in pond, regularly add appropriate anti-salt anaerobic species simultaneously, the anaerobic sludge that waste water is produced at first paragraph anaerobic pond self, under the returned sluge of second segment anaerobic pond and the anti-salt anaerobic species acting in conjunction that adds, complete the elementary anaerobic digestion reaction of waste water, partial organic substances is changed into biogas, part of sulfuric acid root is reduced to hydrogen sulfide and enters in biogas, the water outlet of first paragraph anaerobic pond enters the processing of second segment anaerobic pond, anaerobic digestion reaction further occurs under the anaerobic sludge effect that the waste water in second segment anaerobic pond is produced at self, most of organism is changed into biogas, water outlet enters settling tank processing, the sludge liquid of settling tank is back to first paragraph anaerobic pond at least partly.Unnecessary sludge liquid can be back to second segment anaerobic pond.
In the inventive method, first paragraph anaerobic pond adopts conventional contact process anaerobic reation pool, to adapt to the processing containing high concentration suspended matter; In anaerobic pond, regularly add anti-salt anaerobism dominant bacteria, make anaerobic sludge that high-concentration salt-containing wastewater produces at self and the acting in conjunction of the active sludge of the anti-salt advantage anerobe adding and recovery issue the oxygen digestion reaction of beginning to detest, partial organic substances and sulfate radical are changed into respectively to biogas and hydrogen sulfide, reduce the inorganic salt content in waste water; The mixture that anaerobic pond water inlet is the former water of cellulose ethanol and second segment anaerobic pond sludge liquid after treatment, by conditioning of mud hydraulic control influent COD≤40000mg/L processed, inorganic salt≤1.5%(massfraction).
In the inventive method, second segment anaerobic pond adopts up-flow anaerobic sludge blanket reaction tank, to adapt to the high-load anaerobic processing of waste water (lower concentration suspended substance); Secondary anaerobic digestion reaction occurs under the anaerobic sludge effect that the waste water in reaction tank is produced at self, most of organism and remaining sulfate radical are changed into respectively to biogas and hydrogen sulfide, the inorganic salt content in waste water is able to further reduction; After anaerobic pond water inlet precipitates by settling tank, water outlet can be carried out subsequent disposal, and sludge liquid can be back to first paragraph anaerobic pond.
First paragraph anaerobic pond of the present invention is mainly made up of gas skirt, Chi Gai, pond body, feed-pipe, drainage conduit, whipping device etc.Charging waste water is made up of with second segment anaerobic pond sludge liquid two portions after treatment the former water of cellulose ethanol (solid-liquid separation and cooling rear), and its control volume ratio is: the former water/sludge liquid=1:2～1:5 of cellulose ethanol, is preferably 1:3～1:4; Charging waste water is entered by anaerobic pond underfeed pipe; The biogas producing is discharged by the pneumatic outlet at anaerobic pond top; After processing, water outlet is discharged by anaerobic pond drainage conduit.The residence time of waste water in anaerobic pond is 3～10d, is preferably 5～8d; The water inlet volumetric loading of anaerobic pond is 4～8kgCOD/m
3.d; In anaerobic pond, the service temperature of waste water is 40～42 ℃.
The anti-salt anaerobism dominant bacteria adding in first paragraph anaerobic pond of the present invention is a kind of commercially available biological product, if the trade mark is that syBIO1249[is purchased from Dalian source of students water treating equipment Development Co., Ltd] and seemingly commercial goods of function class, dosage is 0.2～2g/m
3waste water/day, dosing method is to add once for every 0.5～3 day.This product is the mixture of a kind of spore by programmed screening and domestication and the microorganism that nourishes and grows, and microorganism wherein can produce the enzyme of multiple high vigor as lipase, proteolytic enzyme, amylase and cellulase etc.Its main products characteristic be bacterial count 3,000,000,000/gram; Stability keeps 1 year at 2 ℃～35 ℃; PH scope 5.0～9.8; Bacteria types subtilis spore mixes with the microorganism that nourishes and grows; Outward appearance chocolate brown powder.Anti-salt anaerobism dominant bacteria will carry out activation treatment before adding in anaerobic pond, dissolves more than 0.5 hour by the deionized water and stirring of 20 times, puts in anaerobic pond after making robe all be scattered in water again.
Second segment anaerobic pond of the present invention is a kind of common upflow anaerobic sludge blanket reactor (UASB) structure, is mainly made up of four parts such as distribution plate, granule sludge treatment zone, bulking sludge breeding blanket, gas-solid-liquid separators.Processing water outlet from one section of anaerobic pond enters reactor by the bottom of UASB, and methane gas is discharged by the pneumatic outlet of reactor head; Process water outlet and be expelled to settling tank by reactor head liquid outlet.The residence time of waste water in UASB is 12～30h, is preferably 15～25h; Water inlet volumetric loading is 5～15kgCOD/m
3.d, be preferably 8～12kgCOD/m
3.d; In reactor, the service temperature of waste water is 38～40 ℃.
By methane recovery pipe directly or after gas sweetening, send into biogas storage tank and recycle (or utilizing after removing hydrogen sulfide), the volumetric concentration of the methane in sewage gas gas obtaining is 40%～60% to the biogas producing in first paragraph of the present invention and second segment anaerobic pond.
Detention tank of the present invention is a kind of radical sedimentation basin or vertical sedimentation basin of routine, and the residence time of waste water in settling tank is 2～4h, and sludge liquid is back to the dilution water processing of first paragraph anaerobic pond as the former water of cellulose ethanol.
The inventive method adopts two phase anaerobic treatment process to cellulose ethanol waste water, undertaken biological reinforced by the mode that adds anti-salt dominant bacteria and control sludge reflux, treating high-concentration saline organic wastewater is effectively addressed, high-enriched organics in waste water changes into methane recovery utilization, vitriol is reduced into hydrogen sulfide, reaches the object that reduces the inorganic salt content in waste water and contribute to follow-up biochemical treatment.The inventive method water outlet after treatment, greatly reduces the difficulty of waste water subsequent biological treatment, can reach emission standard after adopting aerobic treatment.
The method that the present invention proposes has adopted biological reinforced treatment process to process treating high-concentration saline organic wastewater, has advantages of that investment is little, working cost is low.
Accompanying drawing explanation
Fig. 1 is a kind of cellulose ethanol anaerobic waste water of the present invention biological enhanced processing method schematic flow sheet;
Wherein: 1, first paragraph anaerobic pond; 2, second segment anaerobic pond; 3, detention tank; 4, reinforced anaerobic microorganism dosing system; 5, methane recovery tank.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the inventive method is described.
Cellulose ethanol production wastewater (from the mash at the bottom of ethanol distillation tower) through pressure filter press filtration with after cooling with mudpan
3sludge liquid after treatment is mixed into first paragraph anaerobic pond
1, simultaneously by enhancement microbiological dosing system
4to first paragraph anaerobic pond
1in (regularly) add a certain amount of anti-salt anaerobism dominant bacteria, under the effect of the anti-salt advantage anerobe that makes the second segment anaerobic pond mud of anaerobic sludge, backflow that waste water produces at self and add, complete the elementary anaerobic digestion reaction of waste water, by the partial organic substances in waste water change into biogas, sulfate radical is reduced to hydrogen sulfide, inorganic salt content is obtained to a certain extent and remove, water outlet after treatment enters second segment anaerobic pond
2process.Under the anaerobic sludge effect that waste water in second segment anaerobic pond 2 is cultivated at self, further there is anaerobic digestion reaction, most of organism in waste water is changed into biogas, sulfate radical Restore All is hydrogen sulfide, inorganic salt content in waste water is further reduced, and water outlet after treatment enters detention tank
3process.Mudpan
3in waste water through sludge settling separate after, water-containing sludge is back to first paragraph anaerobic pond with suitable ratio
1before enter first paragraph anaerobic pond after mixing with cellulose ethanol production wastewater (former water)
1in, control in this way first paragraph anaerobic pond
1inorganic salt and the Pollutant levels of water inlet, to meet the processing requirement of anaerobic biological treatment steady running; Clear liquid after settling tank precipitation enters the processing of subsequent biological treatment system.First paragraph anaerobic pond
1with second segment anaerobic pond
2the biogas of middle generation and hydrogen sulfide are respectively by top, pond vapor pipe directly or after gas sweetening (not shown in figure 1), enter methane recovery tank
5recycle.
First paragraph anaerobic pond of the present invention
1for the common contact process anaerobic reation pool of one, selecting of this type of anaerobic reation pool is mainly to consider still to contain higher suspended substance after the press filtration of cellulose ethanol waste water, as xylogen and fermentation residue etc.Anaerobic pond is mainly made up of gas skirt, Chi Gai, pond body, feed-pipe, drainage conduit, whipping device etc., charging waste water is entered by anaerobic pond underfeed pipe, the biogas producing is discharged by the pneumatic outlet at anaerobic pond top, and after processing, water outlet is discharged by anaerobic pond drainage conduit.Charging waste water is the former water of cellulose ethanol and second segment anaerobic pond
2the returned sluge of discharging from mudpan 3 after processing forms, and its control ratio is the former water/sludge liquid=1:2～1:5 of cellulose ethanol, is preferably 1:3～1:4, to guarantee COD≤40000mg/L, inorganic salt≤1.5% in parallel feeding waste water.The residence time of waste water in anaerobic pond is 3～10d, is preferably 5～8d; The water inlet volumetric loading of anaerobic pond is 4～8kgCOD/m
3.d; In anaerobic pond, the service temperature of waste water is 40～42 ℃.
First paragraph anaerobic pond of the present invention
1middle added anti-salt anaerobism dominant bacteria is a kind of commercially available biological product, and the trade mark is syBIO1249, and dosage is 0.5～1g/m
3waste water/day, by reinforced anaerobic microorganism dosing system
4add, dosing method is to add once every day.This product is the mixture of a kind of spore by programmed screening and domestication and the microorganism that nourishes and grows, and microorganism wherein can produce the enzyme of multiple high vigor as lipase, proteolytic enzyme, amylase and cellulase etc.Its main products characteristic be bacterial count 3,000,000,000/gram; Stability keeps 1 year at 2 ℃～35 ℃; PH scope 5.0～9.8; Bacteria types subtilis spore mixes with the microorganism that nourishes and grows; Outward appearance chocolate brown powder.Anti-salt anaerobism dominant bacteria will carry out activation treatment before adding in anaerobic pond, dissolves more than 0.5 hour by the deionized water and stirring of 20 times, puts in anaerobic pond after making robe all be scattered in water again.
Second segment anaerobic pond of the present invention
2adopt conventional up-flow anaerobic sludge blanket reaction tank
(UASB), selecting of this type of anaerobic reation pool is mainly to consider under high sludge loading, to move, thereby reduces investment and floor space.Reaction tank is mainly made up of four parts such as distribution plate, granule sludge treatment zone, bulking sludge breeding blanket, gas-solid-liquid separators.From one section of anaerobic pond
1processing water outlet enter reactor by the bottom of UASB, methane gas is discharged by the pneumatic outlet of reactor head, process water outlet be expelled to settling tank by reactor head liquid outlet.The residence time of waste water in UASB is 12～30h, is preferably 15～25h; Water inlet volumetric loading is 5～15kgCOD/m
3.d, be preferably 8～12kgCOD/m
3.d; In reactor, the service temperature of waste water is 38～40 ℃.
First paragraph anaerobic reation pool of the present invention
1with second segment anaerobic pond
2top, pond vapor pipe is directly or after gas sweetening (not shown in figure 1), enter methane recovery tank respectively for the biogas of middle generation and hydrogen sulfide
5recycle, the volumetric concentration of the methane in sewage gas gas obtaining is 40%～60%.Considering after hydrogen sulfide enters biogas to make the sulphur content in biogas reach 10g/m
3above, biogas utilization (fuel, generating) is produced to secondary pollution, best advanced row gas sweetening processing.
Mudpan of the present invention
3for a kind of radical sedimentation basin or vertical sedimentation basin of routine, the residence time of waste water in settling tank is 2～4h, and sludge liquid is back to the dilution water processing of first paragraph anaerobic pond as the former water of cellulose ethanol.After precipitation, the main pollution of water outlet and sludge liquid consists of: COD≤2000mg/L, inorganic salt≤1.0%.
Adopt the inventive method to carry out the processing of two phase anaerobic enhancement microbiological to the factory effluent of the quick-fried pretreatment technology producd fibers of acid ethanol, can make pollutent COD main in treating high-concentration saline organic wastewater by 130,000 mg/L be reduced to that 2000 mg/L are following, sulfate radical is reduced to by 10,000 mg/L that 10 mg/L are following, inorganic salt are reduced to 1% by 2% left and right, the high density organic constituent major part in waste water is converted to methane recovery utilization.
The present invention is by taking the biochemical treatment process of economic and reliable to reach the object for the treatment of high-concentration saline organic wastewater energy-saving and emission-reduction, utilization of waste material, water outlet after treatment, because organic contamination and inorganic salt content are all significantly reduced, greatly reduces the technical difficulty of follow-up biochemical treatment.
Further illustrate the inventive method and effect below by embodiment.
Adopt treatment process of the present invention to process the cellulose ethanol production equipment waste water of domestic certain medium-sized test scale.The principal character of waste water is: COD 129050 mg/L(chromium methods, lower with), sulfate radical 9290 mg/L, inorganic salt 2.0%, pH 4.0.
Adopt two phase anaerobic enhancement microbiological treatment process of the present invention to carry out laboratory treatment test to above-mentioned waste water, wastewater treatment scale is 200 mL/h, and main experimental installation formation, operational conditions and the treatment effect of each processing unit are in table 1.After processing by method of the present invention, the COD in cellulose ethanol waste water can be reduced to that 2000mg/L is following, inorganic salt amount is reduced to 1.0%, sulfate radical is reduced to 10 mg/L, greatly reduces the technical difficulty of waste water subsequent disposal.
The main processing unit of table 1 embodiment 1 forms and treatment effect.
| processing unit title | treatment unit scale and chief component | main operational conditions and control parameter | water-in and water-out or |
| 1 first paragraph anaerobic pond | adopt contact process technique, material synthetic glass, reactor volume 100L.Mainly comprise the formations such as gas skirt, Chi Gai, pond body, feed-pipe, drainage conduit, whipping device. | bottom intakes continuously; Water inlet is the former water 200mL/h of cellulose ethanol, detention tank sludge liquid 600 mL/h; Waste water total residence time 5.2d; Water inlet volumetric loading 6.0kgCOD/m 3.d; 40 ℃ of service temperatures; The methane gas average-volume concentration 45% of collecting. | mix influent quality: COD 34000mg/L, sulfate radical 2330mg/L, inorganic salt 1.25%, sulfide 20mg/L, pH5.5; Effluent quality: COD 7000mg/L, sulfate radical 400mg/L, inorganic salt 1.05%, sulfide 20mg/L, pH7.5; |
| 2 second segment anaerobic ponds | adopt UASB, material synthetic glass, reactor volume 16L.Mainly comprise the formations such as bottom water distribution board, granule sludge bed, mud buffer layer, Gas-solid-liquid separater, vapor pipe, water shoot, screen cloth. | bottom is water inlet continuously; Water inlet flow velocity 800mL/h; Retention time of sewage 20h; Water inlet volumetric loading 8.4kgCOD/m 3.d; 39 ℃ of service temperatures; The methane gas average-volume concentration 40% of collecting. | effluent quality: COD 2000mg/L, sulfate radical 10mg/L, inorganic salt 1.0%, sulfide 20 mg/L, pH 8.5. |
| 3 detention tanks | adopt slurry tank, material synthetic glass, tank body volume 4L. | sedimentation time 4h.Precipitated liquid is back to first paragraph anaerobic pond, quantity of reflux 600 mL/h; Supernatant liquor discharger. | effluent quality: COD 2000mg/L, sulfate radical 10mg/L, inorganic salt 1.0%, sulfide 20 mg/L, pH 8.5. |
| 5 methane recovery | biogas storage tank and metering system. | first paragraph, second segment anaerobic pond gas are adopted directly and reclaimed. | reclaim biogas amount 240L/d, methane gas average-volume concentration 42% |
Wherein reinforced anaerobic microorganism dosing system working method is: be syBIO1249 to the anti-salt anaerobism dominant bacteria adding in first paragraph anaerobic pond, dosage is 20mg/ day, and add once every day.Bacterial classification adds frontly uses a small amount of deionized water dissolving, and in vibrator even concussion 0.5h, carry out abundant activation treatment.
Adopt the treatment unit of embodiment 1, process the sewage identical with embodiment 1, the water treatment effect that the operational conditions of change each processing unit obtains is in table 2.
The main processing unit of table 2 embodiment 2 forms and treatment effect.
| processing unit title | treatment unit scale and chief component | main operational conditions and control parameter | water-in and water-out or |
| 1 first paragraph anaerobic pond | adopt contact process technique, material synthetic glass, reactor volume 100L.Mainly comprise the formations such as gas skirt, Chi Gai, pond body, feed-pipe, drainage conduit, whipping device. | bottom intakes continuously; Water inlet is the former water 200mL/h of cellulose ethanol, detention tank sludge liquid 800 mL/h; Waste water total residence time 4.2d; Water inlet volumetric loading 6.7kgCOD/m 3.d; 40 ℃ of service temperatures; The methane gas average-volume concentration 43% of collecting. | mix influent quality: COD 28000mg/L, sulfate radical 1900mg/L, inorganic salt 1.25%, sulfide 20mg/L, pH6.0; Effluent quality: COD 6800mg/L, sulfate radical 380mg/L, inorganic salt 1.05%, sulfide 20mg/L, pH7.6; |
| 2 second segment anaerobic ponds | adopt UASB, material synthetic glass, reactor volume 16L.Mainly comprise the formations such as bottom water distribution board, granule sludge bed, mud buffer layer, Gas-solid-liquid separater, vapor pipe, water shoot, screen cloth. | bottom is water inlet continuously; Water inlet flow velocity 1000mL/h; Retention time of sewage 16h; Water inlet volumetric loading 10.2kgCOD/m 3.d; 39 ℃ of service temperatures; The methane gas average-volume concentration 40% of collecting. | effluent quality: COD 1900mg/L, sulfate radical 10mg/L, inorganic salt 1.0%, sulfide 20 mg/L, pH 8.5. |
| 3 detention tanks | adopt slurry tank, material synthetic glass, tank body volume 4L. | sedimentation time 4h.Precipitated liquid is back to first paragraph anaerobic pond, quantity of reflux 800 mL/h; Supernatant liquor discharger. | effluent quality: COD 1900mg/L, sulfate radical 10mg/L, inorganic salt 1.0%, sulfide 20 mg/L, pH 8.5. |
| 5 methane recovery | biogas storage tank and metering system. | first paragraph, second segment anaerobic pond gas are adopted directly and reclaimed. | reclaim biogas amount 241L/d, methane gas average-volume concentration 42% |
Wherein the working method of reinforced anaerobic microorganism dosing system is: be syBIO1249 to the anti-salt anaerobism dominant bacteria adding in first paragraph anaerobic pond, dosage is 25mg/ day, and add once every day.Bacterial classification adds frontly uses a small amount of deionized water dissolving, and in vibrator even concussion 0.5h, carry out abundant activation treatment.
Adopt the treatment unit of embodiment 1, process the sewage identical with embodiment 1, the water treatment effect that the operational conditions of change each processing unit obtains is in table 3.
The main processing unit of table 3 embodiment 3 forms and treatment effect.
| processing unit title | treatment unit scale and chief component | main operational conditions and control parameter | water-in and water-out or |
| 1 first paragraph anaerobic pond | adopt contact process technique, material synthetic glass, reactor volume 100L.Mainly comprise the formations such as gas skirt, Chi Gai, pond body, feed-pipe, drainage conduit, whipping device. | bottom intakes continuously; Water inlet is the former water 200mL/h of cellulose ethanol, detention tank sludge liquid 400 mL/h; Waste water total residence time 6.9d; Water inlet volumetric loading 6.6kgCOD/m 3.d; 40 ℃ of service temperatures; The methane gas average-volume concentration 45% of collecting. | mix influent quality: COD 45600mg/L, sulfate radical 3430mg/L, inorganic salt 1.38%, sulfide 20mg/L, pH4.8; Effluent quality: COD 10000mg/L, sulfate radical 1000mg/L, inorganic salt 1.1%, sulfide 20mg/L, pH7.0; |
| 2 second segment anaerobic ponds | adopt UASB, material synthetic glass, reactor volume 16L.Mainly comprise the formations such as bottom water distribution board, granule sludge bed, mud buffer layer, Gas-solid-liquid separater, vapor pipe, water shoot, screen cloth. | bottom is water inlet continuously; Water inlet flow velocity 600mL/h; Retention time of sewage 26h; Water inlet volumetric loading 9.0kgCOD/m 3.d; 39 ℃ of service temperatures; The methane gas average-volume concentration 40% of collecting. | effluent quality: COD 4000mg/L, sulfate radical 500mg/L, inorganic salt 1.05%, sulfide 20 mg/L, pH 7.9. |
| 3 detention tanks | adopt slurry tank, material synthetic glass, tank body volume 4L. | sedimentation time 4h.Precipitated liquid is back to first paragraph anaerobic pond, quantity of reflux 400 mL/h; Supernatant liquor discharger. | effluent quality: COD 4000mg/L, sulfate radical 500mg/L, inorganic salt 1.05%, sulfide 20 mg/L, pH 7.9. |
| 5 methane recovery | biogas storage tank and metering system. | first paragraph, second segment anaerobic pond gas are adopted directly and reclaimed. | reclaim biogas amount 220L/d, methane gas average-volume concentration 42%. |
Wherein the working method of reinforced anaerobic microorganism dosing system is: be syBIO1249 to the anti-salt anaerobism dominant bacteria adding in first paragraph anaerobic pond, dosage is 20mg/ day, and add once every day.Bacterial classification adds frontly uses a small amount of deionized water dissolving, and in vibrator even concussion 0.5h, carry out abundant activation treatment.
Claims (11)
1. the anaerobe enhanced processing method of a cellulose ethanol waste water, it is characterized in that comprising following process: from mash at the bottom of the tower of cellulose ethanol distillation tower through solid-liquid separation and cool after, be mixed into first paragraph anaerobic pond with second segment anaerobic pond returned sluge liquid after treatment, in first paragraph anaerobic pond, regularly add appropriate anti-salt anaerobic species simultaneously, the anaerobic sludge that waste water is produced at first paragraph anaerobic pond self, under the returned sluge of second segment anaerobic pond and the anti-salt anaerobic species acting in conjunction that adds, complete the elementary anaerobic digestion reaction of waste water, partial organic substances is changed into biogas, part of sulfuric acid root is reduced to hydrogen sulfide and enters in biogas, the water outlet of first paragraph anaerobic pond enters the processing of second segment anaerobic pond, anaerobic digestion reaction further occurs under the anaerobic sludge effect that the waste water in second segment anaerobic pond is produced at self, most of organism is changed into biogas, water outlet enters settling tank processing, the sludge liquid of settling tank is back to first paragraph anaerobic pond at least partly.
2. it is characterized in that in accordance with the method for claim 1: first paragraph anaerobic pond adopts conventional contact process anaerobic reation pool.
3. in accordance with the method for claim 1, it is characterized in that: the mixture that the water inlet of first paragraph anaerobic pond is the former water of cellulose ethanol and second segment anaerobic pond sludge liquid after treatment, by conditioning of mud hydraulic control influent COD≤40000mg/L processed, inorganic salt massfraction≤1.5%.
4. it is characterized in that in accordance with the method for claim 1: second segment anaerobic pond adopts up-flow anaerobic sludge blanket reaction tank.
5. according to the method described in claim 1 or 2, it is characterized in that: first paragraph anaerobic pond is made up of gas skirt, Chi Gai, pond body, feed-pipe, drainage conduit and whipping device.
6. in accordance with the method for claim 3, it is characterized in that: first paragraph anaerobic pond charging waste water is made up of the former water of cellulose ethanol and second segment anaerobic pond sludge liquid after treatment, its control volume ratio is: the former water/sludge liquid=1:2～1:5 of cellulose ethanol.
7. in accordance with the method for claim 1, it is characterized in that: in first paragraph anaerobic pond, the residence time of waste water in anaerobic pond is 3～10d, and the water inlet volumetric loading of anaerobic pond is 4～8kgCOD/ (m
3d); In anaerobic pond, the service temperature of waste water is 40～42 ℃.
8. it is characterized in that in accordance with the method for claim 1: the anti-salt anaerobism dominant bacteria dosage adding in first paragraph anaerobic pond is 0.2～2g/m
3waste water/day, dosing method is to add once for every 0.5～3 day.
9. in accordance with the method for claim 1, it is characterized in that: second segment anaerobic pond is upflow anaerobic sludge blanket reactor, formed by distribution plate, granule sludge treatment zone, the gentle solid-liquid separator in bulking sludge breeding blanket.
10. according to the method described in claim 1 or 9, it is characterized in that: the residence time of waste water in second segment anaerobic pond is 12～30h, water inlet volumetric loading is 5～15kgCOD/ (m
3d), in reactor, the service temperature of waste water is 38～40 ℃.
11. in accordance with the method for claim 1, it is characterized in that: settling tank is radical sedimentation basin or vertical sedimentation basin, and the residence time of waste water in settling tank is 2～4h.
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| CN101565234A (en) * | 2008-04-23 | 2009-10-28 | 广东省广宁县顺宁葡萄糖药业有限公司 | Technology for treating alcohol waste water by anaerobic digestion |
| CN101805100A (en) * | 2010-05-11 | 2010-08-18 | 天津大学 | Method for improving activated sludge concentration in alcohol wastewater full-distillage anaerobic digestion process |
| CN102001792A (en) * | 2010-11-28 | 2011-04-06 | 江苏蓝星环保科技有限公司 | Glyphosate wastewater treatment method |
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| CN101805100A (en) * | 2010-05-11 | 2010-08-18 | 天津大学 | Method for improving activated sludge concentration in alcohol wastewater full-distillage anaerobic digestion process |
| CN102001792A (en) * | 2010-11-28 | 2011-04-06 | 江苏蓝星环保科技有限公司 | Glyphosate wastewater treatment method |
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