CN102344230A - Method for processing biological sludge slurry - Google Patents
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Abstract
The invention relates to a method for processing a biological sludge slurry. The method comprises the following steps: 1, allowing one part of the biological sludge slurry to contact an acid, and allowing the other part of the biological sludge slurry to contact an alkaline substance, wherein the volume of the part contacting the acid accounts for 10-40% of the total volume of the biological sludge slurry, and the volume of the other part contacting the alkaline substance accounts for 60-90% of the total volume; and 2, mixing the biological sludge slurry after the acid contact with the biological sludge slurry after the alkaline contact to form a mixture, adjusting the pH value of the mixture to 5-8, and carrying out solid-liquid separation. The method of the present invention allows the quantitative reduction and the volume reduction of the sludge to be effectively realized.
Description
Technical field
The present invention relates to a kind of treatment process of biological sludge slurry.
Background technology
The municipal sewage plant generally adopts active sludge treatment process, and mikrobe produces a large amount of excess sludges in the process of disposing of sewage, contain a large amount of bacteriums, organism and nutritive substances such as nitrogen, phosphorus in the excess sludge.Along with the Chinese society rapid economy development, the surplus sludge volume that produces because of municipal sewage treatment is also in continuous growth.Therefore, sludge disposal has become the environmental problem of ever more important in recent years.At present, the wastewater treatment in China total amount is 25,800,000,000 tons, and sludge quantity accounts for the 0.3-0.5 volume % of sewage quantity, and moisture percentage in sewage sludge reaches 97%, therefore, before being discharged into environment, must carry out minimizing and handle, to reduce the pollution to environment.Yet because the water ratio of the excess sludge in the sewage is higher, the expense of sludge treatment often accounts for the 30-50% of Sewage Plant working cost, and this has brought very big difficulty to sludge treatment.Therefore, the sludge reduction process of exploitation simple economy not only has good social benefit and environmental benefit, and has considerable economic.
In order to make the mud dissolving and to discharge organism, to reach the purpose that subtracts appearanceization (subtract and hold the volume minimizing that is meant mud) and minimizing (decrement is meant the minimizing of mud dry weight), present widely used method is that mud is carried out anaerobic digestion or aerobic sigestion; And then postdigestive mud handled; Yet required time of sludge digestion is longer, generally about 20 days; Have only the part large-scale wastewater treatment plant just to be furnished with relevant Sludge Digestion facility; And for middle or small sewage treatment, common method is for directly dewatering mud, and the outward transport of the mud cake after will dewatering.
In recent years, there is research that alkaline purification, s.t., thermal treatment etc. are applied in the sludge treatment as pretreatment process.For example, the biological sludge after alkaline purification is used for anaerobically fermenting (referring to EnvironmentalScience and Technology.2004,38:3195-3202).Perhaps, disclose a kind of thermal treatment-dehydration-composting method of sewage sludge like CN101186423A, this method comprises mixes dewatered sludge with sodium hydroxide; And with the mixture heating up that obtains to 120-140 ℃; Kept 40-100 minute, and be cooled to then below 100 ℃, cooled mud is dewatered; Obtain the dehydrated sludge cake after liquid and the decrement, gained filtrating is processed liquid waste material.Yet the dewatering of the mud of process alkaline purification worsens, and feasible mud through alkaline purification is difficult to carry out effective mud-water separation, and can't effectively reach the purpose that subtracts appearanceization and minimizing, and this mud dry weight reduction is merely 35%.In addition, very high through the treatment solution and the pH value of filtrate after the dehydration of alkaline purification, also need add acid again and adjust back neutrality, cause the mass consumption of bronsted lowry acids and bases bronsted lowry.
In addition; Hot acid hydrolysis as a potential treatment of thickened sewagesludge (Journal ofHazardous Materials; 2003; 98 (1-3): 275-293) adopt the hot acid method to handle thickened sludge, its main purpose is sludge dewatering and reducing sludge volume.But the reducing sludge volume processing of mentioning in this method just makes the volume of mud reduce, and mud dry weight possibly not reduce.In addition, after hot acid treatment, the pH of treatment solution is merely 3; Still need add the alkali readjustment to neutral; Cause the acid and alkali consumption amount very big, and cause the medicament expense usefulness and the processing cost of subsequent disposal very high, and limited the application of these treatment processs in reducing sludge volumeization, minimizing process.
Summary of the invention
The method for sludge treatment that the objective of the invention is to overcome prior art can't effectively be realized the purpose that subtracts appearanceization and minimizing of mud slurry; And the consumption of bronsted lowry acids and bases bronsted lowry causes the higher defective of processing cost more greatly in the sludge treatment slurry process; What a kind of effective realization mud slurry was provided subtracts appearanceization and minimizing, and the consumption that can reduce bronsted lowry acids and bases bronsted lowry in the mud slurry treatment process simultaneously is to reduce the biological sludge slurry treatment method of processing cost.
For of the prior art dewatered sludge is mixed with sodium hydroxide; And after at high temperature handling; The reason that the dewatering of the mud of alkaline purification worsens, contriver of the present invention infers it possibly is because after mixing with sodium hydroxide and passing through pyroprocessing, the macromolecular substance stripping of some long-chains in the mud; And in dehydration, these macromolecular substance have hindered deviating from of water molecules in the mud.And contriver of the present invention is surprised to find, and of the present invention part biological mud slurry is contacted with acid adopting, and other a part of biological sludge slurry is contacted with alkali, and then with two portions mixing, can realize the minimizing of mud effectively and subtract appearanceization.
The invention provides a kind of treatment process of biological sludge slurry, wherein, this method comprises the steps:
(1) part biological mud slurry is contacted with acid; Another part biological sludge slurry is contacted with alkaline matter; The volume of the part biological mud slurry that contacts with acid accounts for the 10-40% of mud slurry TV, and the volume of another part biological sludge slurry that contacts with alkali accounts for the 60-90% of mud slurry TV;
(2) will with part biological mud slurry after acid contacts with mix with another part biological sludge slurry after alkali contacts, and the pH value of regulating mixture is 5-8, and carries out solid-liquid separation.
Compare with the method for prior art; For example; Compare with employing hot alkali treatment method; The treatment process of mud provided by the invention has following significant advantage: first: the treatment process of biological sludge slurry of the present invention can be saved 50% dosing at most, greatly reduces processing costs, is of value to environment protection simultaneously; Second: biological sludge slurry dry weight can reduce about 50%, and mud slurry dewatering performance is significantly improved, and mud-water separation is easy, has realized the appearanceization that subtracts of biological sludge; The 3rd: the microorganism cells in the biological sludge slurry is dissolved, and the sewage sludge solid quality reduces, and pathogenic bacteria significantly reduces, and has realized the minimizing and the stabilization of biological sludge, for the further processing of biological sludge slurry is had laid a good foundation; In addition, method of the present invention need not roll up capital construction and facility investment, can reach the purpose of rapid minimizing sludge volume and sludge quantity.
Embodiment
According to the present invention, the treatment process of said mud slurry comprises the steps:
(1) part biological mud slurry is contacted with acid, another part biological sludge slurry is contacted with alkaline matter, the volume of the part biological mud slurry that contacts with acid accounts for the 10-40% of mud slurry TV, is preferably 15-35%; The volume of another part biological sludge slurry that contacts with alkali accounts for the 60-90% of mud slurry TV, is preferably 65-85%;
(2) will with part biological mud slurry after acid contacts with mix with another part biological sludge slurry after alkaline matter contacts, and the pH value of regulating mixture is 5-8, and carries out solid-liquid separation.
Can know that through check and analysis with after acid or alkali contact, the minimizing of the dry weight of biological sludge slurry mainly is the wherein minimizing of organic weight.
Contriver of the present invention finds, accounts for the 10-40%, particularly 15-35% of mud slurry TV when the part biological mud slurry volume that contacts with acid; Another part biological sludge slurry volume that contacts with alkali accounts for the 60-90% of mud slurry TV, and particularly during 35-65%, that handles artifact mud slurry subtracts appearanceizations and minimizing effect excellence especially.
According to the present invention, the selectable range broad of the condition that contacts with acid.Wherein, said acid can be pure acid, also can be aqueous acid, and, do not limit the concentration of aqueous acid is also special.Under the preferable case, the significant quantity of acid accounts for the 0.2-6% of the weight of the part biological mud slurry that contacts with acid, more preferably 0.4-5%.For pure acid, the significant quantity of acid just is meant the quality of acid, and for aqueous acid, the significant quantity of acid refers to the quality of solute in the aqueous acid.Wherein, the condition that contacts with acid comprises the temperature of contact and the time that contacts.For the organism in the mud is dissolved out from mud more easily, effectively reaching the purpose of minimizing, the preferred 40-100 of the temperature of said contact ℃, more preferably 60-100 ℃; The time of contact is preferably 0.5-48 hour, more preferably 1-24 hour.Said acid can be the various acid that can be used to handle mud that this area is commonly used, for example, can be selected from hydrochloric acid, sulfuric acid, nitric acid, the phosphoric acid one or more.
According to the present invention, the selectable range broad of the condition that contacts with alkaline matter.Wherein, said alkaline matter can be a solid, also can be the aqueous solution of alkaline matter, and, do not limit the concentration of the aqueous solution of alkaline matter is also special.Under the preferable case, the significant quantity of alkaline matter accounts for the 0.2-6% of the weight of another part biological sludge slurry that contacts with alkali, more preferably 0.4-5%.For solid, the significant quantity of alkali just is meant the solid masses of alkaline matter, and for the aqueous solution of alkaline matter, the significant quantity of alkali refers to the quality of solute in the aqueous solution of alkaline matter.Wherein, the condition that contacts with alkaline matter comprises the temperature of contact and the time that contacts.For the organism in the mud is dissolved out from mud more easily, effectively to reach the purpose of minimizing, the temperature of said contact is preferably 40-100 ℃, more preferably 60-100 ℃; The time of contact is preferably 0.5-48 hour, more preferably 1-24 hour.Said alkaline matter can be this area alkaline matter commonly used; For example, can be selected from sodium hydroxide, Pottasium Hydroxide, calcium hydroxide, sodium oxide, sodiumperoxide, potassium oxide, Potassium peroxide 85, quicklime, calcium superoxide, lime carbonate, salt of wormwood, saleratus and the sodium hydrogencarbonate one or more.
According to the present invention; Will to regulate the pH value of mixture be that the method for 5-8 is conventionally known to one of skill in the art with mixing the back with another part mud slurry after alkaline matter contacts with part mud slurry after acid contacts; For example; Add acid or alkali and regulate, the concentration and the consumption of acid or alkali can be adjusted according to actual needs, as long as guarantee the pH value of the mixture that obtains are adjusted to 5-8.
Owing to directly from sewage work or other local sewage of discharging, contain a large amount of water and the biological sludge that accounts for the 0.3-0.5 volume % of sewage quantity; In order more to help effective processing to mud; The sewage that preferably before processing, will contain biological sludge earlier concentrates; Obtaining solid content is the 10-100 grams per liter, is preferably the biological sludge slurry (can measure the solid content of said biological sludge slurry with reference to GB11901-89) of 10-50 grams per liter.Therefore can know that said biological sludge slurry is meant the mixing suspension liquid that contains biological sludge and water in fact, therefore, wait to regulate the suspension liquid that the mixture of pH value can think to have flowability described in the above-mentioned steps.
According to the present invention; In step (2), will with part biological mud slurry after acid contacts with mix with another part biological sludge slurry after alkali contacts, and the method for after the pH value of regulating mixture is 5-8, mixture being carried out solid-liquid separation can be the method for various routines known in those skilled in the art; For example; Said mixture is mixed with flocculation agent, carry out spinning or gravity settling then, obtain mud and water and separate.The concrete operations condition of the kind of said flocculation agent, consumption and solid-liquid separation can be the operational condition of the conventional various flocculation agents in this area and conventional consumption and conventional spinning, for example, can be selected from FeCl
3, AlCl
3With in the SEPIGEL 305 one or more.Concrete operations condition and method here repeat no more.
Water ratio according to the mud after the method processing of the present invention can be reduced to original 65-75 weight %, and mud dry weight can be reduced to original 40-60%.
To further describe in detail the present invention through specific embodiment below.
Embodiment 1
Present embodiment is used to explain the treatment process of biological sludge slurry provided by the invention.
The biological sludge of certain Sewage Plant is concentrated into the mud slurry that concentration is 10g/L, and this mud slurry is divided into A, B two portions, making the volume ratio of A part mud slurry and B part mud slurry is 1: 9.Under 30 ℃, in A part mud slurry, adding concentration is the hydrochloric acid of 20 weight %, and the significant quantity of hydrochloric acid is and 0.1% of A part biological mud slurry weight, and stirred 48 hours; Under 30 ℃, in B part mud slurry, add sodium hydrate solid, the significant quantity of sodium hydroxide is and 0.1% of B part biological mud slurry weight, and stirred 48 hours.Then will be with A part mud slurry after acid contacts, mix with B part mud slurry after alkaline matter contacts and transfer pH to 7, and with this mixture and flocculating agent A lCl with hydrochloric acid
3Mix (consumption of flocculation agent is 5 gram/hectogram dewatered sludges), stir, send in the dewatering unit then and dewater.In the present embodiment, mud dry weight reduces 42% altogether, and water ratio is 74% after the sludge dewatering.
Comparative Examples 1
This Comparative Examples is used to explain the biological sludge slurry treatment method of prior art.
It is 10g/L mud slurry that the biological sludge of certain Sewage Plant is concentrated into concentration; In spissated mud slurry, adding sodium hydrate solid under 30 ℃; The significant quantity of sodium hydroxide is 0.1% of this biological sludge slurry weight; And stirred 48 hours, with hydrochloric acid the pH value of said mixture is transferred to 7 then, and with this mixture and flocculating agent A lCl
3Mix (consumption of flocculation agent is 5 gram/hectogram dewatered sludges), stir, send in the dewatering unit then and dewater.In this Comparative Examples, mud dry weight reduces 35%, and water ratio is 83% after the sludge dewatering.
Compare with the method for Comparative Examples 1, the alkali number that adds of the method for embodiment 1 reduces 10%, adds the acid amount and reduces 13%.
Comparative Examples 2
This Comparative Examples is used to explain the biological sludge slurry treatment method of prior art.
It is 10g/L mud slurry that the biological sludge of certain Sewage Plant is concentrated into concentration, and under 30 ℃, in thickened sludge, adding concentration is the hydrochloric acid of 20 weight %, and the significant quantity of hydrochloric acid is and 0.1% of this biological sludge slurry weight, and stirred 48 hours; With aqueous sodium hydroxide solution the pH value of said mixture is transferred to 7 then, and with this mixture and flocculating agent A lCl
3Mix (consumption of flocculation agent is 5 gram/hectogram dewatered sludges), stir, send in the dewatering unit then and dewater.Mud dry weight reduces 32%, and water ratio is 80% after the sludge dewatering.
Compare with the method for Comparative Examples 2, the acid amount that adds of the method for embodiment 1 reduces 12%, adds alkali number and reduces 14%.
Comparative Examples 3
This Comparative Examples is used to explain the reference treatment process of mud slurry.
Method according to embodiment 1 is handled the mud slurry, and different is that the volume ratio of A part mud slurry and B part mud slurry is 5: 5.Under 30 ℃, in A part mud slurry, adding concentration is the hydrochloric acid of 20 weight %, and the significant quantity of hydrochloric acid is and 0.1% of A part biological mud slurry weight, and stirred 48 hours; Under 30 ℃, in B part mud slurry, add sodium hydrate solid, the significant quantity of sodium hydroxide is and 0.1% of B part biological mud slurry weight, and stirred 48 hours.Then will be with A part mud slurry after acid contacts, mix with B part mud slurry after alkaline matter contacts and transfer pH to 7, and with this mixture and flocculating agent A lCl with hydrochloric acid
3Mix (consumption of flocculation agent is 5 gram/hectogram dewatered sludges), stir, send in the dewatering unit then and dewater.In this Comparative Examples, mud dry weight reduces 37% altogether, and water ratio is 79% after the sludge dewatering.
Comparative Examples 4
This Comparative Examples is used to explain the reference treatment process of mud slurry.
Method according to embodiment 1 is handled the mud slurry, and different is that the volume ratio of A part mud slurry and B part mud slurry is 0.5: 9.5.Under 30 ℃, in A part mud slurry, adding concentration is the hydrochloric acid of 20 weight %, and the significant quantity of hydrochloric acid is and 0.1% of A part biological mud slurry weight, and stirred 48 hours; Under 30 ℃, in B part mud slurry, add sodium hydrate solid, the significant quantity of sodium hydroxide is and 0.1% of B part biological mud slurry weight, and stirred 48 hours.Then will be with A part mud slurry after acid contacts, mix with B part mud slurry after alkaline matter contacts and transfer pH to 7, and with this mixture and flocculating agent A lCl with hydrochloric acid
3Mix (consumption of flocculation agent is 5 gram/hectogram dewatered sludges), stir, send in the dewatering unit then and dewater.In this Comparative Examples, mud dry weight reduces 36% altogether, and water ratio is 80% after the sludge dewatering.
Embodiment 2
Present embodiment is used to explain the treatment process of biological sludge slurry provided by the invention.
The biological sludge of certain Sewage Plant is concentrated into the mud slurry that concentration is 100g/L, and this mud slurry is divided into A, B two portions, making the volume ratio of A part mud slurry and B part mud slurry is 3: 7.Under 100 ℃, in A part mud slurry, adding concentration is the hydrochloric acid of 20 weight %, and the significant quantity of hydrochloric acid is and 5% of A part biological mud slurry weight, and stirred 5 hours; Under 100 ℃, in B part mud slurry, add the calcium hydroxide solid, the significant quantity of calcium hydroxide is and 5% of B part biological mud slurry weight, and stirred 5 hours.Then will be with A part mud slurry after acid contacts, mix with B part mud slurry after alkaline matter contacts and transfer pH to 6, and with this mixture and flocculating agent A lCl with calcium hydroxide
3Mix (consumption of flocculation agent is 5 gram/hectogram dewatered sludges), stir, send in the dewatering unit then and dewater.In the present embodiment, mud dry weight reduces 52.7% altogether, and water ratio is 69% after the sludge dewatering.
Comparative Examples 5
This Comparative Examples is used to explain the biological sludge slurry treatment method of prior art.
The biological sludge of certain Sewage Plant is concentrated into the mud slurry that concentration is 100g/L; Under 100 ℃; In spissated mud slurry, add the calcium hydroxide solid, the significant quantity of calcium hydroxide is 5% of this part biological mud slurry weight, and stirs 5 hours; With hydrochloric acid the pH value of said mixture is transferred to 6 then, and with this mixture and flocculating agent A lCl
3Mix (consumption of flocculation agent is 5 gram/hectogram dewatered sludges), stir, send in the dewatering unit then and dewater.In this Comparative Examples, mud dry weight reduces 38%, and water ratio is 83% after the sludge dewatering.
Compare with the method for Comparative Examples 5, the alkali number that adds of the method for embodiment 2 reduces 35%, adds the acid amount and reduces 42%.
Comparative Examples 6
This Comparative Examples is used to explain the biological sludge slurry treatment method of prior art.
It is 100g/L mud slurry that the biological sludge of certain Sewage Plant is concentrated into concentration, and under 100 ℃, in thickened sludge, adding concentration is the hydrochloric acid of 20 weight %, and the significant quantity of hydrochloric acid is and 5% of A part biological mud slurry weight, and stirred 5 hours; With calcium hydroxide aqueous solution the pH value of said mixture is transferred to 6 then, and with this mixture and flocculating agent A lCl
3Mix (consumption of flocculation agent is 5 gram/hectogram dewatered sludges), stir, send in the dewatering unit then and dewater.In the method, mud dry weight reduces 39%, and water ratio is 82% after the sludge dewatering.
Compare with the method for Comparative Examples 6, the acid amount that adds of the method for embodiment 2 reduces 43%, adds alkali number and reduces 41%.
Embodiment 3
Present embodiment is used to explain the treatment process of biological sludge slurry provided by the invention.
The biological sludge of certain Sewage Plant is concentrated into the mud slurry that concentration is 20g/L, and this mud slurry is divided into A, B two portions, making the volume ratio of A part mud slurry and B part mud slurry is 15: 85.Under 90 ℃, in A part mud slurry, adding concentration is the sulfuric acid of 90 weight %, and the vitriolic significant quantity is and 2% of A part biological mud slurry weight, and stirred 24 hours; Under 90 ℃, in B part mud slurry, adding concentration is the aqueous sodium hydroxide solution of 50 weight %, and the amount of sodium hydroxide is and 2% of B part biological mud slurry weight in the aqueous sodium hydroxide solution, and stirs 24 hours.Then will be with A part mud slurry after acid contacts, mix with B part mud slurry after alkaline matter contacts and transfer pH to 8, and with this mixture and flocculation agent FeCl with sulfuric acid
3Mix (consumption of flocculation agent is 5 gram/hectogram dewatered sludges), stir, send in the dewatering unit then and dewater.In the present embodiment, mud dry weight reduces 56.2% altogether, and water ratio is 75% after the sludge dewatering.
Comparative Examples 7
This Comparative Examples is used to explain the biological sludge treatment process of prior art.
The biological sludge of certain Sewage Plant is concentrated into the mud slurry that concentration is 20g/L; Under 90 ℃, in thickened sludge, adding concentration is the aqueous sodium hydroxide solution of 50 weight %; The amount of sodium hydroxide is and 2% of B part biological mud slurry weight in the aqueous sodium hydroxide solution; And stirred 24 hours, with sulfuric acid the pH value of said mixture is transferred to 8 then, and with this mixture and flocculation agent FeCl
3Mix (consumption of flocculation agent is 5 gram/hectogram dewatered sludges), stir, send in the dewatering unit then and dewater.In the method, mud dry weight reduces 37.8% altogether, and water ratio is 82% after the sludge dewatering.
Compare with the method for Comparative Examples 7, the alkali number that adds of the method for embodiment 3 reduces 15%, adds the acid amount and reduces 13%.
Comparative Examples 8
This Comparative Examples is used to explain the biological sludge treatment process of prior art.
It is 20g/L mud slurry that the biological sludge of certain Sewage Plant is concentrated into concentration, and under 100 ℃, in thickened sludge, adding concentration is the sulfuric acid of 90 weight %, and the vitriolic significant quantity is and 2% of A part biological mud slurry weight, and stirred 24 hours; With aqueous sodium hydroxide solution the pH value of said mixture is transferred to 8 then, and with this mixture and flocculation agent FeCl
3Mix (consumption of flocculation agent is 5 gram/hectogram dewatered sludges), stir, send in the dewatering unit then and dewater.In the method, mud subtracts dry weight and reduces 39%, and the dewatered sludge water ratio is 82%.
Compare with the method for Comparative Examples 8, the acid amount that adds of the method for embodiment 3 reduces 16%, adds alkali number and reduces 14%.
Embodiment 4
Present embodiment is used to explain the treatment process of biological sludge slurry provided by the invention.
The biological sludge of certain Sewage Plant is concentrated into the mud slurry that concentration is 20g/L, and this mud slurry is divided into A, B two portions, making the volume ratio of A part mud slurry and B part mud slurry is 40: 60.Under 90 ℃, in A part mud slurry, adding concentration is the sulfuric acid of 90 weight %, and the vitriolic significant quantity is and 2% of A part biological mud slurry weight, and stirred 24 hours; Under 90 ℃, in B part mud slurry, adding concentration is the aqueous sodium hydroxide solution of 50 weight %, and the amount of sodium hydroxide is and 2% of B part biological mud slurry weight in the aqueous sodium hydroxide solution, and stirs 24 hours.Then will be with A part mud slurry after acid contacts, mix with B part mud slurry after alkaline matter contacts and transfer pH to 8, and with this mixture and flocculation agent FeCl with sulfuric acid
3Mix (consumption of flocculation agent is 5 gram/hectogram dewatered sludges), stir, send in the dewatering unit then and dewater.In the present embodiment, mud dry weight reduces 45% altogether, and water ratio is 75% after the sludge dewatering.
Claims (13)
1. the treatment process of a biological sludge slurry is characterized in that, this method comprises the steps:
(1) part biological mud slurry is contacted with acid; Another part biological sludge slurry is contacted with alkaline matter; The volume of the part biological mud slurry that contacts with acid accounts for the 10-40% of mud slurry TV, and the volume of another part biological sludge slurry that contacts with alkali accounts for the 60-90% of mud slurry TV;
(2) will with part biological mud slurry after acid contacts with mix with another part biological sludge slurry after alkali contacts, and the pH value of regulating mixture is 5-8, carries out solid-liquid separation afterwards.
2. method according to claim 1, wherein, the volume of the part biological mud slurry that contacts with acid accounts for the 15-35% of mud slurry TV, and the volume of another part biological sludge slurry that contacts with alkali accounts for the 65-85% of mud slurry TV.
3. method according to claim 1 and 2, wherein, the significant quantity of acid accounts for the 0.2-6% of the weight of the part biological mud slurry that contacts with acid.
4. method according to claim 3, wherein, the significant quantity of acid accounts for the 0.4-5% of the weight of the part biological mud slurry that contacts with acid.
5. method according to claim 1 and 2, wherein, the condition that contacts with acid comprises that the temperature of contact is 40-100 ℃, the time of contact is 0.5-48 hour.
6. method according to claim 5, wherein, the condition that contacts with acid comprises that the temperature of contact is 60-100 ℃, the time of contact worm is 1-24 hour.
7. method according to claim 1 and 2, wherein, said acid is selected from one or more in hydrochloric acid, sulfuric acid, nitric acid, the phosphoric acid.
8. method according to claim 1 and 2, wherein, the significant quantity of alkaline matter accounts for the 0.2-6% of the weight of another part biological sludge slurry that contacts with alkaline matter.
9. method according to claim 8, wherein, the significant quantity of alkaline matter accounts for the 0.4-5% of the weight of another part biological sludge slurry that contacts with alkaline matter.
10. method according to claim 1 and 2, wherein, the condition that contacts with alkaline matter comprises that the temperature of contact is 40-100 ℃, the time of contact is 0.5-48 hour.
11. method according to claim 10, wherein, the condition that contacts with alkaline matter comprises that the temperature of contact is 60-100 ℃, and the time of contact is 1-24 hour.
12. method according to claim 1 and 2; Wherein, said alkaline matter is selected from one or more in sodium hydroxide, Pottasium Hydroxide, calcium hydroxide, sodium oxide, sodiumperoxide, potassium oxide, Potassium peroxide 85, quicklime, calcium superoxide, lime carbonate, salt of wormwood, saleratus and the sodium hydrogencarbonate.
13. method according to claim 1, wherein, the solid content of mud is the 10-100 grams per liter in the said biological sludge slurry.
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| CN103880259A (en) * | 2012-12-19 | 2014-06-25 | 同济大学 | Method for promoting hydrolysis of sludge by using calcium peroxide and increasing effect of anaerobic digestion of sludge |
| CN103880259B (en) * | 2012-12-19 | 2016-04-20 | 同济大学 | Utilize calcium peroxide to promote sludge hydrolytic and improve the method for anaerobic sludge digestion effect |
| CN107311418A (en) * | 2016-04-26 | 2017-11-03 | 中国石化扬子石油化工有限公司 | A kind of device and method of petrochemical sludge efficient anaerobe conversion |
| CN106915876A (en) * | 2017-02-24 | 2017-07-04 | 中山大学 | A kind of utilization bipolar membrane electrodialysis device electrolytic salt produces the method that alkali carries sludge digestibility high is produced in acid |
| CN107140799A (en) * | 2017-04-26 | 2017-09-08 | 天津壹新环保工程有限公司 | A kind of online decrement treatment method and apparatus of sludge |
| CN108033496A (en) * | 2017-11-30 | 2018-05-15 | 张磊 | A kind of farmland water getting fat using sludge as matrix purifies adjuvant |
| CN108033496B (en) * | 2017-11-30 | 2021-05-07 | 甘南县龙头岭有机肥有限公司 | Farmland water fertilizing and purifying auxiliary agent with sludge as matrix |
| CN112195197A (en) * | 2020-09-24 | 2021-01-08 | 深圳德蓝生态环境有限公司 | Method for producing acid by anaerobic fermentation of sludge |
| WO2023024217A1 (en) * | 2021-08-24 | 2023-03-02 | 北京工业大学 | Method for using electrochemical process to assist in processing of sludge |
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