CN101851053B - Inorganic composite sludge dehydration conditioner and application thereof - Google Patents
Inorganic composite sludge dehydration conditioner and application thereof Download PDFInfo
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- CN101851053B CN101851053B CN2010101986490A CN201010198649A CN101851053B CN 101851053 B CN101851053 B CN 101851053B CN 2010101986490 A CN2010101986490 A CN 2010101986490A CN 201010198649 A CN201010198649 A CN 201010198649A CN 101851053 B CN101851053 B CN 101851053B
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Abstract
The invention relates to an inorganic composite sludge dehydration conditioner and application thereof. The application comprises the following steps of: weighing and uniformly mixing sodium dodecyl benzene sulfonate and sodium hydroxide in a mass ratio of 2: 10-100, adding the mixture in an amount which is 0.1 to 1.0 time the dry basis weight of the sludge into secondary excess sludge with water content of about 95 percent, stirring the sludge for 1 to 2 days to mix the sludge uniformly, finally dehydrating the sludge by using a plate-and-frame filter press to obtain dehydrated mud cakes with water content of 70 to 75 percent, and obtaining 40 to 45 percent of sludge reduction rate; and stirring 100 to 150 parts of dehydrated supernate and 100 parts of secondary excess sludge with the water content of about 95 percent for 1 to 2 days to mix the sludge uniformly, and dehydrating the sludge by using the plate-and-frame filter press to obtain dehydrated mud cakes with water content of 73.0 to 76.7 percent. Compared with the dehydration after the treatment with the inorganic composite sludge dehydration conditioner, the pressure load of the plate-and-frame filter press is reduced by 5 to 8 percent, and the press-filtration time is reduced by about 10 percent; the process is simple and the operation is convenient; compared with the conventional inorganic conditioner, the method of the invention has a little using amount, basically does not increase the volume, improves the reduction rate by 3 to 10 percent, and avoids secondary pollution; and the inorganic composite sludge dehydration conditioner can be widely applied to dehydration of the excess sludge.
Description
Technical field
The present invention relates to a kind of inorganic composite sludge dehydration conditioner, further relate to and utilize this inorganic composite sludge dehydration conditioner that mud is carried out dehydration treatment method, belong to the urban domestic sewage sludge processing technology field.
Background technology
Along with developing rapidly of Chinese Urbanization; The understanding of people's environmental pollution control is being deepened; Sewage work continues mutually and puts into operation in each main cities; Increasing sharply of sewage work's quantity causes a large amount of municipal sludges to produce in succession, and its quantity accounts for the 0.3%-0.5% that handles the water yield.Mud is bulky usually, and component is complicated, and variability is big, and except that higher water ratio, it also contains a large amount of pathogenic microorganisms, parasitic ovum and a certain amount of heavy metal (like Hg simultaneously; Cd, Cr, Pb, As; Zn, Cu, Ni etc.) and multiple poisonous and hazardous organic pollutant, and produce with stench.These unfavorable factors have all been brought inconvenience to its transportation, storage and follow-up recycling.Present most of municipal sewage plant adopts biochemical process to dispose of sewage, and regular meeting produces a large amount of biochemical sludges in this process, and it mainly is made up of the hydroaropic substance of gel-like texture.Because the hydration shell effect of pedesis, the electrostatic repulsion between colloidal solid and the colloidal grain surface of colloidal particle; Most mud granule be difficult for coalescence and dispersion suspension in water; Flco structure that mud granule is special and highly-hydrophilic performance also make its moisture that comprises be difficult to be removed.And the sludge conditioning dehydration can change mud colloidal structure characteristic effectively; Improve the filtration and the dehydration property of mud; Sterilization also can promote organic hydrolysis fast, thereby reaches the purpose of the minimizing of mud, for the follow-up transportation of mud, compost, burning, landfill and soil utilization have improved condition; Simultaneously also reduce its environmental hazard to greatest extent, reached the harmony of economy and environment.
For this reason, research and develop and seek the dehydrating and conditioning agent of economy, efficient, environmental protection, effectively improve the dewatering of mud, carried out number of research projects.
Chinese patent document " sludge dewatering and stabilization treatment method " (publication number CN 1693242A; Open day on November 9th, 2005) relate to a kind of sludge dewatering and stabilization treatment method; Through add alkaline pulverulent material two step process to the mud heat drying with in mud; Mud is dewatered and stabilization treatment, and industrial residue alkalescence powder can be the flying dust of flyash, industrial dust, fly-ash separator collection etc.Aspects such as its hardness of treated mud, viscosity and bonding characteristic all have clear improvement, dewatering performance of sludge be improved significantly.But the add-on of its amendment is bigger, and this follow-up safe disposal to mud is very disadvantageous, also can increase the safe disposal expense of mud simultaneously greatly.，
Chinese patent document " chemical amendment of sludge dewatering and dewatering thereof " (publication number CN1986788A; Open day on June 27th, 2007) relate to a kind of chemical amendment of sludge dewatering; Obtain by molysite, calcium salt and quicklime are compound; This inorganic sludge dehydration conditioner is in sludge dewatering conditioning process, and the molysite addition is the 0.2%-1.5% of mud weight; Calcium salt and/or quicklime addition are the 1%-4.5% of mud weight, and its process object is that water ratio is about 90% mud.Although its dewatering efficiency is higher, this method receives the restriction of mud physicochemical property stronger, is unfavorable for the dehydration of biological sludge.
Chinese patent document " modified tempering method in a kind of sludge handling process and application thereof " (publication number CN101012097A; Open day on August 8th, 2007) being the sludge modification amendment with sulfurous iron ore or flyash in, is earlier sulfurous iron ore or the flyash of admixture mud weight 1%-50% in the mud of 70%-80% at water ratio; The mixture of resulting mud and sulfurous iron ore or flyash is sent into stirrer, and adding water ratio in the time of stirring is the dried mud of 5%-8%, and its water ratio of mud after modified is reduced to 30%-35%; Gained part mud is carried out drying, and obtaining water ratio is the dried mud of 5%-8%, and all the other water ratio are that the mud of 30%-35% is discharged.Its shortcoming is that the mud increase-volume is bigger, and the resource utilization difficulty of dewatered sludge is bigger.
Chinese patent document " sludge dehydrating agent and dewatering thereof " (publication number CN 101100345A; Open day on January 9th, 2008) disclose a kind of with molysite, to have surface-active ion dispersion agent, particulate material and water be the chemical amendment of staple; Its usage quantity is respectively the 1%-3% of pretreated water-containing sludge; 1%-5%, 3%-6% and 60%-70%.Earlier in aqueous mud, add molysite; 1-3 minute stirring reaction time; In water-containing sludge, add molysite again and stirred 2-6 minute, interpolation has surface-active ion dispersion agent, churning time 2-8 minute in aqueous mud again; Add particulate material, 2-6 minute stirring reaction time to aqueous mud at last.Its dehydrating effect is better, but invests higherly, and therefore and complex technical process is subject to the restriction of treatment scale.
Chinese patent document " method of dehydrating activated sludge by waste alkaline residue/alkali liquor " (publication number CN101289268A; Open day on October 22nd, 2008) disclose a kind of method of dehydrating activated sludge by waste alkaline residue/alkali liquor, dewatering agent consists of alkaline residue: quicklime: SEPIGEL 305: the butt=25-40 of active sludge: 7-13: 0.12-0.25: 100 parts of quality.Dewatered sludge stability is higher, also can realize the utilization again of discarded alkali slag simultaneously, but its main drawback is that the mud increase-volume is bigger, and the follow-up recycling of mud is difficulty.
Chinese patent document " a kind of inorganic composite conditioner and mud dewatering method thereof " (publication number CN101397181A; Open day on April 1st, 2009) relate to a kind of inorganic composite conditioner and mud dewatering method thereof; The inorganic composite conditioner of sludge dewatering mainly comprises flyash and unslaked lime, and wherein the weight percent of flyash is 17%-75%, and residual content is a unslaked lime; After optimizing improvement, the weight percent of flyash is 37.5%-64%.It is 6%-20% that inorganic composite conditioner adds weight percent.This method can obtain the lower mud of water ratio, but its addition is bigger, and mud increase-volume problem is comparatively serious.
Although more than invention differs from one another; But still there are three following big deficiency and shortcomings when being applied to sludge dewatering: one. the amendment add-on is bigger; The increase-volume amount of mud is bigger, has a strong impact on the follow-up recycling of mud, and also is unfavorable for the follow-up safe disposal of mud.Two. sludge conditioning technology is comparatively complicated, is not suitable for extensive sludge conditioning dehydration and uses.Three. economy and environmental benefit are relatively poor relatively, and investment is higher with working cost.
Summary of the invention
The object of the invention is to provide a kind of economical and efficient, technology is simple, cheap, addition is few sewage plant excess sludge dehydrating and conditioning agent; Be difficult for producing secondary pollution when using this inorganic composite sludge dehydration conditioner; Mud can obtain pretreating effect preferably, and can effectively suppress the generation of mud foul gas.
In order to achieve the above object, the present invention adopts the X 2073 of 2 parts of weight and the sodium hydroxide of 10-100 part weight to form the novel inorganic composite sludge dehydration conditioner that is used for sludge dewatering.
The optimization of above-mentioned two components consists of the X 2073 of 2 parts of weight and the sodium hydroxide of 25-75 part weight.
The method of carrying out sludge dewatering with above-mentioned inorganic composite sludge dehydration conditioner comprises following two steps:
The first step, modified
Earlier the commercially available technical grade sodium hydroxide of 10-100 part weight and the commercially available technical grade X 2073 of 2 parts of weight are mixed; Process inorganic composite sludge dehydration conditioner; Again inorganic composite sludge dehydration conditioner being joined water ratio is in about 95% the second pond excess sludge; The dosage of inorganic composite sludge dehydration conditioner is 0.1-1.0 a times of mud butt weight; Stir, chien shih inorganic composite sludge dehydration conditioner and mud mix when continuing to keep stirring 1-2 days at last, obtain the mud mixed liquid after modified.
Second step, dehydration
Mud mixed liquid with the first step after modified carries out mechanical dehydration with plate-and-frame filter press; Obtain dehydrated sludge cake and supernatant that water ratio is 70%-75%; Supernatant adds the mud mixed liquid that obtains in the mud after modified as amendment, and the sludge reduction rate reaches 40%-45%.
The water ratio of measuring supernatant and 100 parts of volumes of 100-150 part volume is about 95% second pond excess sludge; Stirred 1-2 days; Supernatant and mud are mixed carry out mechanical dehydration afterwards, obtain the dehydrated sludge cake that water ratio is 73.0%-76.7%, handle the back dehydration with the employing inorganic composite sludge dehydration conditioner and compare; The pressure load of plate-and-frame filter press can effectively reduce 3%-8%, and time of filter pressing reduces about 2%-10%.
Advantage of the present invention and effect:
1. because the present invention is a raw material with the X 2073 and the sodium hydroxide of Cheap highly effective, wide material sources; Pass through the mixed inorganic compounding dehydrating and conditioning agent that gets; Therefore compare with the used organic and inorganic flocculation agent of polymer of routine; Be difficult for producing secondary pollution, have environmental benefit preferably.
2. because the present invention is with X 2073 and sodium hydroxide is composite forms, and wherein the linear chain structure of X 2073 (LAS) is easy to biological degradation, its biodegradability is greater than 90%; Environment is residual less; Minimum to the environmental hazard degree, and two kinds of medicaments among the present invention have stronger germicidal action, can kill the pathogenic bacterium in the mud effectively; Prevent the propagation of pathogenic bacteria in the mud; Therefore compare with the used organic and inorganic chemical amendment of routine, secondary pollution is little, has environmental benefit preferably.
3. because the present invention is formed so that certain proportioning is composite by X 2073 and sodium hydroxide, when being used for the sludge conditioning dehydration, can change mud colloid surface characteristic effectively; Destroy the flucculation structure of mud, the alkaline environment that forms simultaneously can kill microorganisms, destroys its cellularstructure; Protein hydrolysate and nucleic acid decompose the carbohydrate in the thalline, make that original insoluble organism discharges in born of the same parents in the sludge microbe cell; Become dissolved matter, thereby the part combination water also is released out, has improved the dissolved organic matter content in the mud liquid phase; Simultaneously also improve dewatering performance of sludge effectively, therefore, using inorganic compounding dehydrating and conditioning of the present invention agent is that the excess sludge of 95% second pond is nursed one's health dehydration to water ratio; Can obtain the dehydrated sludge cake about water ratio 70%-75% after the sludge dewatering, the sludge reduction rate reaches and is 40%-45%, compares with existing inorganic conditioner that to have a consumption few; Basically not increase-volume, and the minimizing rate improves 3%-10%.
4. after dewatering with inorganic compounding dehydrating and conditioning of the present invention agent; Resulting supernatant is used plate-and-frame filter press after mixing with the mud of second pond as amendment after the plate-and-frame filter press press filtration; Handling the back dehydration with the employing inorganic composite sludge dehydration conditioner compares; The pressure load of plate-and-frame filter press can effectively reduce 5%-8%, and time of filter pressing reduces about 10%, thus the consumption of the energy when having reduced processed; Improve the utilising efficiency of this amendment to greatest extent, stopped secondary pollution.
Description of drawings
Fig. 1 carries out the dehydration treatment method schema for inorganic composite sludge dehydration conditioner of the present invention to mud
Embodiment
In conjunction with accompanying drawing the present invention is done further explain.See also Fig. 1.
Embodiment 1
At first, measure 2 parts of weight of commercially available technical grade X 2073,10 parts of weight of commercially available technical grade sodium hydroxide mix, and process inorganic composite sludge dehydration conditioner.
Then; Measure the inorganic composite sludge dehydration conditioner of the present invention of 0.60kg; With the 100kg water ratio is that 95% second pond excess sludge mixes, and stirs the mud mixed liquid behind obtain mixing after 1-2 days time modified, with plate-and-frame filter press mud mixed liquid is carried out mechanical dehydration; The plate-and-frame filter press model is xMZ/1250, obtains water ratio and be 75.8% dehydrated sludge cake.
Embodiment 2
The preparation of inorganic composite sludge dehydration conditioner of the present invention is except the weight of sodium hydroxide is that 25 remaining is identical with embodiment 1 especially.
The use of inorganic composite sludge dehydration conditioner of the present invention is; Except measuring the inorganic composite sludge dehydration conditioner of the present invention that quality is 1.35kg; With the 100kg water ratio be that 95% second pond excess sludge mixes, obtain mixing after churning time 1-2 days modified after mud mixed liquid, with plate-and-frame filter press mud mixed liquid is carried out mechanical dehydration; Obtain water ratio and be outside 72.0% the dehydrated sludge cake, remaining is identical with embodiment 1.
Embodiment 3
The preparation of inorganic composite sludge dehydration conditioner of the present invention is except the weight of sodium hydroxide is that 75 remaining is identical with embodiment 1 especially.
The use of inorganic composite sludge dehydration conditioner of the present invention is; Except measuring the inorganic composite sludge dehydration conditioner of the present invention that quality is 3.85kg; With the 100kg water ratio is that 95% second pond excess sludge mixes, and stirs the mud mixed liquid behind obtain mixing after 1-2 days modified, with plate-and-frame filter press mud mixed liquid is carried out mechanical dehydration; Obtain water ratio and be outside 72.7% the dehydrated sludge cake, remaining is identical with embodiment 1.
Embodiment 4
The preparation of inorganic composite sludge dehydration conditioner of the present invention is except the weight of sodium hydroxide is that 100 remaining is identical with embodiment 1 especially.
The use of inorganic composite sludge dehydration conditioner of the present invention is; Except measuring the inorganic composite sludge dehydration conditioner of the present invention that quality is 5.10kg; With the 100kg water ratio is that 95% second pond excess sludge mixes, and stirs the mud mixed liquid behind obtain mixing after 1-2 days modified, with plate-and-frame filter press mud mixed liquid is carried out mechanical dehydration; Obtain water ratio and be outside 72.6% the dehydrated sludge cake, remaining is identical with embodiment 1.
Embodiment 5
At first; The water ratio of supernatant and 100 parts of volumes of measuring the embodiment 1-4 of 100-150 part volume is about 95% second pond excess sludge, mixes, and continues original stirring; Make supernatant and mud mix after 1-2 days time; Obtain the mud mixed liquid after modified, carry out mechanical dehydration then, obtain the dehydrated sludge cake that water ratio is 73.0%-76.7%.
It is that 95% excess sludge carries out dewatering after the modifier treatment and compares as amendment to water ratio that supernatant adds the mud mixed liquid that obtains in the mud after modified and embodiment 1-4 employing inorganic composite sludge dehydration conditioner; The pressure load of its plate-and-frame filter press can effectively reduce 3%-8%, and time of filter pressing reduces about 2%-10%.
The present invention is because the container size that adopts is unqualified, so stirring velocity is not done requirement, stirring gets final product.
Claims (2)
1. the application method of an inorganic composite sludge dehydration conditioner,
Earlier the commercially available technical grade sodium hydroxide of 10-100 part weight and the commercially available technical grade X 2073 of 2 parts of weight are mixed, process inorganic composite sludge dehydration conditioner;
It is characterized in that:
Again inorganic composite sludge dehydration conditioner being added to water ratio is in about 95% the second pond excess sludge; The dosage of inorganic composite sludge dehydration conditioner is 0.1-1.0 a times of mud butt weight; Stir; Continue to keep stir 1-2 days time at last, inorganic composite sludge dehydration conditioner and mud are mixed, obtain the mud mixed liquid after modified;
Mud mixed liquid after modified is carried out mechanical dehydration with plate-and-frame filter press, obtain dehydrated sludge cake and supernatant that water ratio is 70-75%, the sludge reduction rate reaches 40%-45%.
2. the application method of a kind of inorganic composite sludge dehydration conditioner according to claim 1; It is characterized in that: described supernatant adds the mud mixed liquid that obtains in the mud after modified as amendment; Be that supernatant and 100 parts of volumetric water contents of measuring 100-150 part volume earlier is about 95% second pond excess sludge; Stir; And continue to keep stirring 1-2 days, supernatant and mud are mixed carry out mechanical dehydration with plate-and-frame filter press afterwards, obtain the dehydrated sludge cake that water ratio is 73.0%-76.7%.
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| CN102206031B (en) * | 2011-04-26 | 2013-08-21 | 周悦先 | Cleaning agent for urban sewage sludge and sludge treatment method |
| CN103739177B (en) * | 2014-01-09 | 2015-02-25 | 浙江卓锦工程技术有限公司 | Preparation method of sludge deep dewatering biological conditioner and civil sludge deep dewatering method |
| CN104263405B (en) * | 2014-09-30 | 2017-01-25 | 玉门市宝立源环境科技有限公司 | Demulsifier for decomposing petroleum-based oil slurry and using method of demulsifier |
| CN104761117B (en) * | 2015-03-17 | 2017-07-28 | 新奥科技发展有限公司 | A kind of sludge viscosity reducing process |
| CN104973751B (en) * | 2015-08-06 | 2017-03-08 | 台明青 | A kind of additive for sludge dewatering and mud dewatering method |
| CN113082846B (en) * | 2021-03-26 | 2024-08-13 | 路德环境科技股份有限公司 | Impurity removal and purification process for alkaline residue of ammonia-soda plant |
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| JP2005334730A (en) * | 2004-05-25 | 2005-12-08 | Katayama Chem Works Co Ltd | Composition for sludge solidification and sludge solidification method |
| CN1814764A (en) * | 2005-11-17 | 2006-08-09 | 同济大学 | Method for promoting sludge to produce organic acid utilizing surface active agent |
| CN101088942A (en) * | 2006-06-14 | 2007-12-19 | 中国科学院生态环境研究中心 | Process of treating oil-containing sludge |
| CN101100345A (en) * | 2007-06-26 | 2008-01-09 | 广州铬德工程有限公司 | Sludge dewatering agent and dewatering method thereof |
| CN101721916A (en) * | 2008-10-24 | 2010-06-09 | 中国石油化工股份有限公司 | Chemical cleaning method of reverse osmosis membrane |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005334730A (en) * | 2004-05-25 | 2005-12-08 | Katayama Chem Works Co Ltd | Composition for sludge solidification and sludge solidification method |
| CN1814764A (en) * | 2005-11-17 | 2006-08-09 | 同济大学 | Method for promoting sludge to produce organic acid utilizing surface active agent |
| CN101088942A (en) * | 2006-06-14 | 2007-12-19 | 中国科学院生态环境研究中心 | Process of treating oil-containing sludge |
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| CN101721916A (en) * | 2008-10-24 | 2010-06-09 | 中国石油化工股份有限公司 | Chemical cleaning method of reverse osmosis membrane |
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