CN104098238A - Deep treatment method of excess sludge - Google Patents
Deep treatment method of excess sludge Download PDFInfo
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- CN104098238A CN104098238A CN201410336164.1A CN201410336164A CN104098238A CN 104098238 A CN104098238 A CN 104098238A CN 201410336164 A CN201410336164 A CN 201410336164A CN 104098238 A CN104098238 A CN 104098238A
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Abstract
The invention discloses a deep treatment method of excess sludge and belongs to the field of sludge treatment. According to the method, dewatering deep treatment is performed on the excess sludge produced during sewage treatment through steps of sludge blending, pretreatment, thermophilic anaerobic digestion, deep dewatering and the like, the solid content of the dewatered sludge can reach 40%-50%, and the reduction, the stabilization, the harmlessness and the recycling of the sludge are realized.
Description
Technical field
The present invention relates to a kind for the treatment of process of mud, be specifically related to a kind of deep treatment method of excess sludge, belong to field of sludge treatment.
Background technology
Mud is the final product of sewage disposal, and pollutent concentration degree is high, comparison of ingredients complexity, and organic content is high, and wetting ability is strong, and specific surface area is large, and dehydration difficulty is large, and mechanical dehydration efficiency is low.At present, the mud of municipal sewage plant of China has more than 80% and is effectively disposed.Most of sewage work is just by adding chemical agent (PAM etc.) to the modified mechanical dehydration that carries out again of mud, but use merely chemical agent can only improve the dewatering speed of mud, cannot improve degree of dehydration, the water ratio of final mud is still up to 80%.This dewatered sludge is still solid-liquid admixture, and pasty state is not easy to carry and stack; Volume is relatively huge again, and organic content is high, easily corrupt, has had a strong impact on follow-up sludge disposal; And there is various pathogenic bacterium and parasitic ovum, part Of Heavy Metal Level In Sludge exceeds standard, and very easily causes environmental pollution, threatens the eubiosis.
In recent years, the deep dehydration technique of mud is risen gradually, adopt physical method (microwave, ultrasonic, heating etc.) or chemical process (adding various inorganic or organic amendments) to carry out pre-treatment to excess sludge, the filter press class mechanical dewatering equipment that is aided with diaphragm filter press again and is representative improves the dewatering efficiency of mud, reduces the water ratio of filter cake.Although deep dehydration technique can significantly improve the solid content of mud, exist amendment consumption large, reagent consumption accounts for the 25%-30% of mud dry solids wt; Organic content in mud is still higher, and stability is bad, and heavy metal and pathogenic bacterium still exist, and causes certain limitation to follow-up sludge disposal.
Summary of the invention
The object of this invention is to provide a kind of deep treatment method of excess sludge, this deep treatment method comprises mud allotment, pre-treatment, thermophilic digestion, four steps of deep dehydration, it can significantly improve the solid content of mud, realizes minimizing, stabilization, the innoxious and resource utilization of mud.
To achieve these goals, the present invention adopts following technical scheme:
A deep treatment method for excess sludge, it comprises mud allotment, pre-treatment, thermophilic digestion, four steps of deep dehydration.The deep treatment method of wherein said excess sludge specifically comprises the steps:
(1) mud allotment: in mud blend tank, it is 6%-12% that the dewatered sludge of high solid content and excess sludge are mixed to the solid content that makes to mix rear mud by a certain percentage.Dewatered sludge mixes with excess sludge after conditioning, reaches suitable mud solid content scope, and the mud in this solid content scope is more conducive to carry out subsequent disposal.
Wherein, the dewatered sludge of described high solid content is the excess sludge after mechanical dehydration, its solid content is 14%-23%, described excess sludge is excess sludge or its combination in excess sludge after excess sludge after town sewage is processed, industrial sewage are processed, biological wastewater treatment process, its solid content is generally 1%-2%, while now mixing, the dewatered sludge of high solid content and the mass mixing ratio of excess sludge are 1:(1-2), the hybrid mode of two kinds of mud is preferably mechanical stirring; After mixing, the solid content of mud is 6%-12%, is preferably 8%-10%.
(2) pre-treatment: the mixing sludge of step (1) is joined to ultrasonic treatment unit and carry out supersound process, enter heating unit after supersound process and heat-treat.
Wherein, in described ultrasonication, supersound process frequency is 20-40kHz, is preferably 28kHz; Treatment time is 10-60min, is preferably 20-30min; Described heating unit is interchanger, and thermal treatment temp is 55-70 DEG C, is preferably 60 DEG C; Heat treatment time is 1-3h, is preferably 2h.
Shearing force and the shockwave of ultrasonic produced high temperature, high pressure and ultra-high speed jet generation can destroy microorganism wall in mud flco structure and mud, make enzyme and other organic matter from stripping in cell, improve the hydrolysis environment of mud, make the microorganism cells not broken up lose ability to bear to digestive environments, can be consumed by anaerobion very soon, thus the digestive process of accelerate sludge; Adopt lower ultrasonic frequency (being no more than 40kHz), can obtain efficient sludge disintegration effect, be more conducive to follow-up sludge dewatering.
Compare with high-temperature-hot-water solution, the easy realization of low-temperature heat treatment and safety coefficient are high, can either realize the object of the cell walls of partial destruction sludge microbe, can not suppress again the biological activity of methanogen, thermal treatment makes originally in the VOCs emission that wraps up for the microorganism wall water surrounding outside born of the same parents, accelerate the acidication of mud, shorten the residence time of mud in anaerobic digestion reaction vessel, improve methane production, and energy consumption is lower, without cooling specially, easy and simple to handle.
(3) thermophilic digestion: the pretreated mud of step (2) enters thermophilic digestion tank and carries out anaerobic digestion.
Wherein, described digestion temperature is 50 DEG C-60 DEG C, is preferably 55 DEG C ± 2 DEG C; PH is controlled at 6.5-7.5, is preferably 7.0-7.5; Described digestion time is 7-12d, is preferably 8-10d.
Anaerobic sludge digestion experience acidication, product hydrogen produce acetic acid and produce 3 stages of methane, mud after ultrasonic wave and thermal treatment combined action, acidication efficiency greatly improves, organic content in water can increase within a short period of time greatly, thereby shorten the residence time of anaerobic digestion, and can significantly improve the generation of biogas.
(4) deep dehydration: the postdigestive mud of step (3) enters pressure filter and carries out deep dehydration.
In above-mentioned steps, pressure filter is plate-and-frame filter press, preferably autoclave diaphragm pressure filter, entering mud pressure is 0.2-0.3MPa, pressurize 30-40min under the pressure of 1.5-2.0MPa, then push 10-20min under the pressure of 2.0-2.5MPa, the mud solid content after dehydration can reach 40%-50%.
Mud is after ultrasonic wave, heat pre-treatment and thermophilic digestion, and dewatering significantly improves, and adopts the mud that can obtain solid content after plate-and-frame filter press extruding and can reach 40%-50%, this mud is solid-state, and volume is little, is convenient to carry and stack, organic content is low, and environmental pollution is little.
Compared with prior art, obtained beneficial effect is in the present invention:
1, the present invention is by carrying out the excess sludge of the dewatered sludge of high solid content and low solid content mixing preparation to reach suitable mud solid content scope, and it can significantly reduce the processing load of follow-up mud, improves sludge treatment efficiency.
2, dewatered sludge mixes with excess sludge after conditioning, carries out anaerobic digestion with the mud of 8%-10% solid content, and the anaerobic digestion of more traditional 4% solid content mud, can reduce anaerobic digestion tank volume, reduces laid down cost and operational management cost.
3, in the present invention the supersound process of lower frequency and low-temperature heat treatment combine use, greatly shortened the residence time of mud in anaerobic digestion reaction vessel, and can improve the biogas output in anaerobic digestion process, reinforced anaerobic digestive efficiency.The biogas that sludge high temperature anaerobic digestion produces can be used as the heat treated energy, can reduce running cost, energy-saving and cost-reducing.
4, mud is after thermophilic digestion, and organic content obviously reduces, pathogenic bacteria basically eliminate, and heavy metals immobilization, sludge stabilizing degree is high, and dewatering is also significantly improved, and is conducive to follow-up deep dehydration.
5, the reagent consumption of deep dehydration only accounts for the 0.5%-0.6% of mud dry solids wt, and compared with the reagent consumption amount 25%-30% of traditional technology, reagent cost significantly reduces.
6, process after the solid content of mud significantly improve, reduction is obvious, has realized minimizing, stabilization, innoxious and resource utilization, is conducive to follow-up sludge disposal, as agricultural in compost, burning electricity generation etc.
Brief description of the drawings
Fig. 1 is the process flow sheet of the present invention to excess sludge deep treatment method.
Embodiment
Fig. 1 is the process flow sheet of the present invention to excess sludge deep treatment method.As seen from Figure 1, excess sludge deep treatment method of the present invention comprises the steps: dewatered sludge and excess sludge after mud blend tank mixes, then process and finish dealing with through excusing from death treatment unit, thermal treatment unit, thermophilic digestion device, autoclave diaphragm pressure filter successively, the solid content of the dehydrated sludge cake obtaining is 40%-50%.The biogas producing in treating processes can be cycled to used in thermal treatment unit.Below will further illustrate the present invention by specific embodiment, but it should be appreciated by those skilled in the art that the specific embodiment of the invention and do not limit the present invention in any way.Within taking up an official post and how all fall into protection scope of the present invention with replacement on basis of the present invention.
Embodiment 1
1. mud allotment: dewatered sludge (is taken between Shandong Xinshidai Pharmaceutical Industry Co., Ltd.'s sewage works sludge dewatering, solid content 14%, pH is 6.8, in solid, organic composition accounts for 53%) and excess sludge (Shandong Xinshidai Pharmaceutical Industry Co., Ltd.'s sewage works sludge thickener, solid content 2%, pH is 6.9, in solid, organic composition accounts for 57%) be added to mud blend tank according to weight ratio 1:1, after fully mixing, mechanical stirring obtains mixing sludge (solid content 8%, pH is 6.8, and in solid, organic composition accounts for 54%).
2. pre-treatment: mixing sludge first passes through ultrasonic treatment unit, supersound process frequency is 40kHz, the treatment time is 10min; Enter subsequently thermal treatment unit, thermal treatment temp is 55 DEG C, and the treatment time is 3.0h.
3. thermophilic digestion: pretreated mud enters thermophilic digestion tank, digestion temperature is controlled at 50 DEG C, and pH is controlled at 7.5 left and right, and solid retention time is 10d.
4. deep dehydration: adopt autoclave diaphragm pressure filter to carry out deep dehydration to digested sludge, entering mud pressure is 0.2MPa, pressurize 40min under the pressure of 1.5MPa, then push 20min at the pressure lower diaphragm plate of 2.0MPa, the mud solid content after dehydration is 42%.
Embodiment 2
1. mud allotment: by dewatered sludge (between Shandong Xinshidai Pharmaceutical Industry Co., Ltd.'s sewage works sludge dewatering, solid content 19%, pH is 6.7, in solid, organic composition accounts for 55%) and excess sludge (Shandong Xinshidai Pharmaceutical Industry Co., Ltd.'s sewage works sludge thickener, solid content 1%, pH is 6.9, in solid, organic composition accounts for 58%) be added to mud blend tank according to weight ratio 1:1, after fully mixing, mechanical stirring obtains mixing sludge (solid content 10%, pH is 6.8, and in solid, organic composition accounts for 55%).
2. pre-treatment: mixing sludge first passes through ultrasonic treatment unit, supersound process frequency is 20kHz, the treatment time is 60min; Enter subsequently thermal treatment unit, thermal treatment temp is 70 DEG C, and the treatment time is 1.0h.
3. thermophilic digestion: pretreated mud enters thermophilic digestion tank, digestion temperature is controlled at 60 DEG C, and pH is controlled at 7.0 left and right, and solid retention time is 8d.
4. deep dehydration: adopt autoclave diaphragm pressure filter to carry out deep dehydration to digested sludge, entering mud pressure is 0.3MPa, pressurize 30min under the pressure of 2.0MPa, then push 10min at the pressure lower diaphragm plate of 2.5MPa, the mud solid content after dehydration is 48%.
Embodiment 3
1. mud allotment: raw sludge (is taken between Shandong Xinshidai Pharmaceutical Industry Co., Ltd.'s sewage works sludge dewatering, solid content 23%, pH is 7.0, in solid, organic composition accounts for 56%) and excess sludge (Shandong Xinshidai Pharmaceutical Industry Co., Ltd.'s sewage works sludge thickener, solid content 2%, pH is 6.9, in solid, organic composition accounts for 61%) be added to mud blend tank according to weight ratio 1:2, after fully mixing, mechanical stirring obtains mixing sludge (solid content 9%, pH is 6.9, and in solid, organic composition accounts for 57%).
2. pre-treatment: mixing sludge first passes through ultrasonic treatment unit, supersound process frequency is 28kHz, the treatment time is 30min; Enter subsequently thermal treatment unit, thermal treatment temp is 60 DEG C, and the treatment time is 2h.
3. thermophilic digestion: pretreated mud enters thermophilic digestion tank, digestion temperature is controlled at 55 DEG C, and pH is controlled at 7.0 left and right, and solid retention time is 9d.
4. deep dehydration: adopt autoclave diaphragm pressure filter to carry out deep dehydration to digested sludge, entering mud pressure is 0.2MPa, pressurize 30min under the pressure of 1.6MPa, then push 15min at the pressure lower diaphragm plate of 2.3MPa, the mud solid content after dehydration is 45%.
Claims (8)
1. a deep treatment method for excess sludge, is characterized in that, it comprises the steps:
(1) mud allotment;
(2) pre-treatment;
(3) thermophilic digestion;
(4) deep dehydration.
2. the deep treatment method of excess sludge as claimed in claim 1, is characterized in that, it comprises the steps:
(1) mud allotment: the high solid content dewatered sludge and the excess sludge that are 14%-23% by solid content mix, the solid content that makes to mix rear mud is 6%-12%;
(2) pre-treatment: mud after mixing in step (1) is carried out to supersound process, wherein the frequency of supersound process is 20-40kHz, the supersound process time is 10-60min, after supersound process completes, mud after mixing is heat-treated, wherein thermal treatment temp is 55-70 DEG C, and heat treatment time is 1-3h;
(3) thermophilic digestion: will carry out thermophilic digestion through step (2) mud after treatment, controlling digestion temperature is 50 DEG C-60 DEG C, and pH is controlled at 6.5-7.5, and digestion time is 7-12d;
(4) deep dehydration: use plate-and-frame filter press to carry out filter press by mud after step (3) digestion process, wherein entering mud pressure is 0.2-0.3MPa, controlling sheet frame pressure is 1.5-2.0MPa pressurize 30-40min, and then controlling sheet frame pressure is 2.0-2.5MPa pressurize 10-20min.
3. the deep treatment method of excess sludge as claimed in claim 2, is characterized in that, after mixing in described step (1), the solid content of mud is 8%-10%.
4. the deep treatment method of excess sludge as claimed in claim 2, is characterized in that, in described step (2), supersound process frequency is 28kHz, and the supersound process time is 20-30min; Described thermal treatment temp is 60 DEG C, and heat treatment time is 2h.
5. the deep treatment method of excess sludge as claimed in claim 2, is characterized in that, in described step (3), described digestion temperature is 55 DEG C ± 2 DEG C, and pH is controlled at 7.0-7.5, and digestion time is 8-10d.
6. the deep treatment method of excess sludge as claimed in claim 2, is characterized in that, in described step (4), described plate-and-frame filter press is autoclave diaphragm pressure filter.
7. the deep treatment method of excess sludge as claimed in claim 2, is characterized in that, the solid content of described excess sludge is 1-2%, and the mass mixing ratio of described high solid content dewatered sludge and excess sludge is 1:(1-2).
8. the deep treatment method of excess sludge as claimed in claim 7, it is characterized in that, described excess sludge is excess sludge or its combination in excess sludge after excess sludge after town sewage is processed, industrial sewage are processed, biological wastewater treatment process, and described dewatered sludge is the excess sludge after mechanical dehydration.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104926064A (en) * | 2015-05-25 | 2015-09-23 | 遵义师范学院 | Method for improving water-removing performance of urban sludge by coupling treatment of ultrasonic wave and chitosan |
| CN104944720A (en) * | 2015-06-11 | 2015-09-30 | 辽宁大学 | Method for materializing, co-pretreating, and strengthening excess sludge anaerobic fermentation to generate short chain volatile acid |
| CN105130143A (en) * | 2015-09-11 | 2015-12-09 | 同济大学 | High-solid sludge anaerobic digestion pretreatment method used in low-temperature condition |
| CN106007274A (en) * | 2016-05-14 | 2016-10-12 | 合肥中盛水务发展有限公司 | Deep treatment method of sludge |
| CN106186611A (en) * | 2016-08-31 | 2016-12-07 | 柳州市润广科技有限公司 | A kind of deep treatment method of excess sludge |
| CN106755141A (en) * | 2016-12-21 | 2017-05-31 | 北京城市排水集团有限责任公司 | The method that pyrohydrolysis joint high temperature anaerobic acidifying improves acidogenesis of waste activated sludge amount |
| CN107628738A (en) * | 2016-07-18 | 2018-01-26 | 中国石油化工股份有限公司 | A kind of residual active sludge depth decrement method |
| CN109748470A (en) * | 2017-11-02 | 2019-05-14 | 中国石油化工股份有限公司 | A kind of method of microbiological treatment excess sludge |
| CN114195352A (en) * | 2021-12-14 | 2022-03-18 | 郭楠 | Deep dehydration treatment process for sludge of industrial sewage treatment plant |
| CN118545880A (en) * | 2024-07-29 | 2024-08-27 | 临沂市环境保护科学研究所有限公司 | Treatment method of high-viscosity sludge |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02222798A (en) * | 1989-02-23 | 1990-09-05 | Sumitomo Heavy Ind Ltd | Pretreatment of sludge |
| JP2004008892A (en) * | 2002-06-05 | 2004-01-15 | Mitsubishi Electric Corp | Treatment method for organic waste fluid and treatment apparatus therefor |
| JP2004034000A (en) * | 2002-07-08 | 2004-02-05 | Ebara Corp | Sludge treatment method and apparatus for reducing generation of excess sludge |
| CN1765780A (en) * | 2005-09-14 | 2006-05-03 | 北京天地人环保科技有限公司 | Method for sludge reduction using ultrasonic treatment |
| CN101659505A (en) * | 2009-09-15 | 2010-03-03 | 深圳市蓝凤凰环保科技有限公司 | System and method for automatically separating solid from liquid by self-thermal high-temperature aerobic digestion of mud |
| CN103011542A (en) * | 2012-12-13 | 2013-04-03 | 清华大学 | Anaerobic digestion device and process for pre-treating sludge with high solid content by heating method |
-
2014
- 2014-07-15 CN CN201410336164.1A patent/CN104098238B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02222798A (en) * | 1989-02-23 | 1990-09-05 | Sumitomo Heavy Ind Ltd | Pretreatment of sludge |
| JP2004008892A (en) * | 2002-06-05 | 2004-01-15 | Mitsubishi Electric Corp | Treatment method for organic waste fluid and treatment apparatus therefor |
| JP2004034000A (en) * | 2002-07-08 | 2004-02-05 | Ebara Corp | Sludge treatment method and apparatus for reducing generation of excess sludge |
| CN1765780A (en) * | 2005-09-14 | 2006-05-03 | 北京天地人环保科技有限公司 | Method for sludge reduction using ultrasonic treatment |
| CN101659505A (en) * | 2009-09-15 | 2010-03-03 | 深圳市蓝凤凰环保科技有限公司 | System and method for automatically separating solid from liquid by self-thermal high-temperature aerobic digestion of mud |
| CN103011542A (en) * | 2012-12-13 | 2013-04-03 | 清华大学 | Anaerobic digestion device and process for pre-treating sludge with high solid content by heating method |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104926064A (en) * | 2015-05-25 | 2015-09-23 | 遵义师范学院 | Method for improving water-removing performance of urban sludge by coupling treatment of ultrasonic wave and chitosan |
| CN104944720A (en) * | 2015-06-11 | 2015-09-30 | 辽宁大学 | Method for materializing, co-pretreating, and strengthening excess sludge anaerobic fermentation to generate short chain volatile acid |
| CN105130143A (en) * | 2015-09-11 | 2015-12-09 | 同济大学 | High-solid sludge anaerobic digestion pretreatment method used in low-temperature condition |
| CN106007274A (en) * | 2016-05-14 | 2016-10-12 | 合肥中盛水务发展有限公司 | Deep treatment method of sludge |
| CN106007274B (en) * | 2016-05-14 | 2018-10-09 | 合肥中盛水务发展有限公司 | A kind of deep treatment method of sludge |
| CN107628738A (en) * | 2016-07-18 | 2018-01-26 | 中国石油化工股份有限公司 | A kind of residual active sludge depth decrement method |
| CN106186611A (en) * | 2016-08-31 | 2016-12-07 | 柳州市润广科技有限公司 | A kind of deep treatment method of excess sludge |
| CN106755141A (en) * | 2016-12-21 | 2017-05-31 | 北京城市排水集团有限责任公司 | The method that pyrohydrolysis joint high temperature anaerobic acidifying improves acidogenesis of waste activated sludge amount |
| CN109748470A (en) * | 2017-11-02 | 2019-05-14 | 中国石油化工股份有限公司 | A kind of method of microbiological treatment excess sludge |
| CN114195352A (en) * | 2021-12-14 | 2022-03-18 | 郭楠 | Deep dehydration treatment process for sludge of industrial sewage treatment plant |
| CN118545880A (en) * | 2024-07-29 | 2024-08-27 | 临沂市环境保护科学研究所有限公司 | Treatment method of high-viscosity sludge |
| CN118545880B (en) * | 2024-07-29 | 2024-10-22 | 临沂市环境保护科学研究所有限公司 | Treatment method of high-viscosity sludge |
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