CN105110587B - A kind of sludge pretreatment technique with desalting effect - Google Patents
A kind of sludge pretreatment technique with desalting effect Download PDFInfo
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- CN105110587B CN105110587B CN201510630990.1A CN201510630990A CN105110587B CN 105110587 B CN105110587 B CN 105110587B CN 201510630990 A CN201510630990 A CN 201510630990A CN 105110587 B CN105110587 B CN 105110587B
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Abstract
The invention provides a kind of sludge pretreatment technique with desalting effect, comprise the following steps：1), sludge is placed in acid dip pickle, acid is then put into and separated after pickling, stirring reaction, obtain desalination sludge and the pickle containing inorganic salts, pickle pH<2；2), by step 1) in pickle input purification pond, and highly basic adjusts pH to 48 in adding, and must purify liquid and sediment, purify liquid and enter sewage-treatment plant；3), by step 2) in sediment input preparing pool and add inorganic acid, obtain flocculant；4) by step 1) in desalination sludge input acidity readjustment pond, then add in highly basic, make pH>6, gained reactant enters Treatment of Sludge.The present invention is located at conventional sludge treatment technique front end, through after this PROCESS FOR TREATMENT, the inorganic salts in sludge reduce 50 90%, and flocculant, chemical fertilizer raw material or building materials can be made in the inorganic salts extracted.Sludge subsequent treatment disposal efficiency is improved, processing disposal facility scale and operation cost is reduced.
Description
Technical field
The invention belongs to sludge treatment field, more particularly, to a kind of sludge pretreatment technique with desalting effect.
Background technology
With the raising of sewage disposal discharge standard in recent years, traditional sewage plant biochemical processing process can not be met
The emission request of total phosphorus, while the method for using chemical dephosphorization in view of cost factor, most water factories, is added in handling process
A large amount of molysite or aluminum salt flocculant, make to be mixed into substantial amounts of inorganic metal salt in water factory's activated sludge, and then make in mixing sludge
Organic composition reduction, ultimately result among the sludge of sewage plant, inorganic salts account for the 35% of dewatered sludge component even
More, the subsequent treatment disposal to sludge brings problems.For example, the reduction of organic principle result in anaerobic digestion in sludge
With the reduction of aerobic compost treatment effeciency, the more desiccation for causing the reduction of sludge calorific value also to cause sludge of inorganic constituents in sludge
Cost is burned to be significantly increased etc..In addition, for water purification plants, because of the suspension that needs are gone in water removal in handling process,
A large amount of flocculants can be equally put into, causes to contain a large amount of inorganic metal salts in waterworks sludge, is subsequently difficult to high efficient resourcing.
The content of the invention
In view of this, the present invention is directed to propose a kind of sludge pretreatment technique with desalting effect, to isolate sludge
In part inorganic metal salt, improve sludge treatment effeciency and inorganic salts utilization rate.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of sludge pretreatment technique with desalting effect, located at Treatment of Sludge front end, the technique comprises the following steps：
1), sludge is placed in acid dip pickle, inorganic acid is then put into or organic acid carries out pickling, be sufficiently stirred for reaction,
Then separate, obtain desalination sludge and the pickle containing inorganic salts, the pickle pH<2；
2), by step 1) in pickle input purification pond, then to purification pond in add in highly basic, adjust pH to 4-8, instead
Deserved purification liquid and inorganic sediment, the purification liquid enter sewage-treatment plant；
3), by step 2) in inorganic sediment input preparing pool, and add inorganic acid, be sufficiently stirred for reaction, must flocculate
Agent；
4), by step 1) in desalination sludge input acidity readjustment pond, then add in highly basic, make pH>6, gained reaction
Thing enters Treatment of Sludge.
Further, when step 1) in sludge moisture content be 85%-99.8% when, sludge is directly placed in acid dip pickle
In；When step 1) in moisture percentage in sewage sludge be less than 85% when, sludge is placed in the quenched pond of sludge, add water modulate and be diluted to aqueous
Rate is 85-99.8%, is then put into acid dip pickle.
Further, step 1) in desalination sludge pickling after at least through once wash after enter back into acidity readjustment pond, and
Pickle is aggregated into washing lotion, the washing lotion PH with the supernatant after washing every time<3, if only need to once wash, after once washing
Washing sludge enter Treatment of Sludge, if need to repeatedly wash, last washing after washing sludge enter Treatment of Sludge.
Further, step 1) in desalination sludge pickling after need to sequentially pass through twice washing enter back into acidity readjustment pond, it is right
Desalination sludge is once washed and separated once to wash supernatant and once washes sludge, the once washing supernatant
pH<2.5, to once washing the secondary washing of sludge progress and separating, obtain secondary washing supernatant and secondary washing sludge, described two
The pH of secondary washing supernatant<3, the pickle, once washing supernatant mix to obtain washing lotion with secondary washing supernatant, described to wash
Liquid PH<3, it is preferable that the water outlet with water after sewage-treatment plant processing of pickling, once washing and secondary washing.
Further, step 1) in separate mode for gravity concentration, floatation thickening, centrifugation or filter.
Further, step 1) in the stirring reaction time be at least 30 minutes.
Further, the middle highly basic is calcium oxide, calcium hydroxide, sodium hydroxide, magnesia, magnesium hydroxide or potassium hydroxide
In one or more.
Further, the organic acid is oxalic acid, and the inorganic acid is hydrochloric acid, sulfuric acid or nitric acid.
Further, by step 2) in sediment input preparing pool, and add sulfuric acid, be sufficiently stirred for reaction, make PH ＜ 4,
Obtain inorganic flocculating agent；
Or by step 2) in sediment be discharged into sludge dehydration device and be dehydrated, dewatering type is frame dehydration, belt
Dehydration or centrifugal dehydration, material or as phosphorous chemical fertilizer raw material after dehydration, or add cement brick material is made into prilling granulator, make
Grain device is ring die pelleter or Flat die cuber.
Further, the Treatment of Sludge is done including anaerobic sludge digestion, sludge aerobic compost, sludge anaerobic compost, sludge
Change burning, sludge high temperature pyrolysis, sludge protein extraction or sludge protein feed.
Relative to prior art, a kind of sludge pretreatment technique with desalting effect of the present invention has following excellent
Gesture：
1) a kind of sludge pretreatment technique with desalting effect of the present invention is located at specific resistance to filtration technique
Front end, through after this PROCESS FOR TREATMENT, the inorganic salts in sludge reduce 50-90%, realize the separation of inorganic salts ingredients in sludge,
The efficiency of sludge subsequent treatment disposal is improved, so as to reduce the scale and operation cost of processing disposal facility.For example, inorganic
The reduction of thing total amount, content of organics accounting is relative to be improved, and rear continued access anaerobic technique, unit sludge gas producing efficiency is improved, biogas residue
Yield is reduced；The removal of inorganic metal salt, subsequently connects hair care ferment technique, and the fertilizer of generation can reduce heavy metal pollution wind
Danger；The relative reduction of total mud amount, energy consumption can be greatly lowered in the desiccation stage in rear continued access anhydration and incineration technique, in burning phase,
Because calorific value is improved, without adding other auxiliary fuels again, you can self-sustaining burning；
2) a kind of sludge pretreatment technique with desalting effect of the present invention extracted molysite in sludge with
Aluminium salt, can be made into the flocculant containing iron aluminium salt, be easy to the subsequent treatment of sludge and sewage；
3) a kind of sludge pretreatment technique with desalting effect of the present invention, when processing sludge is sewage treatment plant
During sludge, this technique also extracts the materials such as the phosphorus and amino acid in sludge while inorganic salts are extracted, and what is extracted is inorganic
Salt, phosphorus and amino acid can be made into flocculant, and chemical fertilizer raw material is made after may also pass through dehydration, can also add and brick is made after curing agent
Material.
Brief description of the drawings
The accompanying drawing for constituting the part of the present invention is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the sludge treatment technique block diagram comprising washing process described in the embodiment of the present invention；
Fig. 2 is the process flow diagram without quenched washing described in the embodiment of the present invention；
Fig. 3 is the sludge treatment technique block diagram for including washing process twice described in the embodiment of the present invention.
Embodiment
It should be noted that in the case where not conflicting, the embodiment in the present invention and the feature in embodiment can phases
Mutually combination.
Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
A kind of sludge pretreatment technique with desalting effect, located at Treatment of Sludge front end, the technique comprises the following steps：
1), sludge is placed in acid dip pickle, inorganic acid is then put into or organic acid carries out pickling, be sufficiently stirred for reaction,
Then separate, obtain desalination sludge and the pickle containing inorganic salts, the pickle pH<2；
2), by step 1) in pickle input purification pond, then to purification pond in add in highly basic, adjust pH to 4-8, instead
Deserved purification liquid and inorganic sediment, the purification liquid enter sewage-treatment plant；
3), by step 2) in inorganic sediment input preparing pool, and add inorganic acid, be sufficiently stirred for reaction, must flocculate
Agent；
4), by step 1) in desalination sludge input acidity readjustment pond, then add in highly basic, make pH>6, gained reaction
Thing enters Treatment of Sludge.
Preferably, when step 1) in sludge moisture content be 85%-99.8% when, sludge is directly placed in acid dip pickle
In；When step 1) in moisture percentage in sewage sludge be less than 85% when, sludge is placed in the quenched pond of sludge, add water modulate and be diluted to aqueous
Rate is 85-99.8%, is then put into acid dip pickle.
Preferably, step 1) in desalination sludge pickling after at least through once wash after enter back into acidity readjustment pond, and
Pickle is aggregated into washing lotion, the washing lotion PH with the supernatant after washing every time<3, if only need to once wash, after once washing
Washing sludge enter Treatment of Sludge, if need to repeatedly wash, last washing after washing sludge enter Treatment of Sludge；More preferably
Ground, step 1) in desalination sludge pickling after need to sequentially pass through twice washing enter back into acidity readjustment pond, to desalination sludge carry out
Once wash and separate once to wash supernatant and once wash sludge, the pH for once washing supernatant<2.5, to one
Secondary washing sludge carries out secondary washing and separated, and obtains secondary washing supernatant and secondary washing sludge, the secondary washing supernatant
The pH of liquid<3, the pickle, once washing supernatant mix to obtain washing lotion, the washing lotion PH with secondary washing supernatant<3；More
Preferably, pickling, the supernatant with water after sewage-treatment plant processing of once washing and secondary washing.
Step 1) in separate mode for gravity concentration, floatation thickening, centrifugation or filtering, preferable separate mode for gravity it is dense
Contracting, concentration time 20-60 minutes, the moisture percentage in sewage sludge after concentration is 95%-98%.
Step 1) in the stirring reaction time be at least 30 minutes.
The middle highly basic is one in calcium oxide, calcium hydroxide, sodium hydroxide, magnesia, magnesium hydroxide or potassium hydroxide
Plant or several.
The organic acid is oxalic acid, and the inorganic acid is hydrochloric acid, sulfuric acid or nitric acid.
By step 2) in sediment input preparing pool, and add sulfuric acid, be sufficiently stirred for reaction, make PH ＜ 4, obtain inorganic wadding
Solidifying agent；It is highly preferred that the flocculant includes molysite and aluminium salt.
Or by step 2) in sediment be discharged into sludge dehydration device and be dehydrated, dewatering type is frame dehydration, belt
Dehydration or centrifugal dehydration, material or as phosphorous chemical fertilizer raw material after dehydration, or cement is added, building materials are made into prilling granulator,
Prilling granulator is ring die pelleter or Flat die cuber.
The Treatment of Sludge include anaerobic sludge digestion, sludge aerobic compost, sludge anaerobic compost, sludge anhydration burning,
Sludge high temperature pyrolysis, sludge protein are extracted or sludge protein feed.
Embodiment 1：
As shown in Figure 1, water treatment plant sludge, moisture percentage in sewage sludge 80-85%, grab sample is used after the desiccation of part
It is 65% that spectrophotometer, which measures molysite and the total content of aluminium salt in sludge, and sludge is put into the quenched pond of sludge, add water it is quenched simultaneously
Moisture content 90% is diluted to, sludge is put into pickling tank, 20% hydrochloric acid is then put into, reaction is sufficiently stirred for and carries out for 70 minutes
Pickling, is concentrated after pickling using gravity concentration method, and concentration time is 30 minutes, obtains desalination sludge and pickle, described
Pickle pH<2, pickling sludge is discharged into water washing tank and washed, reaction 30 minutes is sufficiently stirred for, makes pH<3, using gravity
Concentration method is concentrated, and concentration time is 40 minutes, must wash sludge and washing supernatant, pickle, washing supernatant mixing
Obtain pH<3 washing lotion, is discharged into acidity readjustment pond by washing sludge, then adds calcium oxide, make pH>6, grab sample, part desiccation
Use the total content of spectrophotometer detection inorganic salts for 5% afterwards, sludge enters Treatment of Sludge；Washing lotion is discharged into purification pond, so
Sodium hydroxide is put into backward purification pond, by pH regulations to 4, liquid and the sediment containing iron aluminium must be purified, sediment, which enters, to be adjusted
With pond, sulfuric acid is then put into preparing pool, by PH regulations to 3, the flocculant containing iron aluminium is obtained, purification liquid is then discharged into dirt
Water treatment facilities, the effluent reuse of sewage-treatment plant to front end pickling and water washing device.
Embodiment 2：
As shown in Figure 2, sewage treatment plant's municipal sludge, moisture percentage in sewage sludge is 85-99.8%, and grab sample is partly adopted
It is 45% with the gravimetric method detection content of organic matter, detects the total content of inorganic salts after the desiccation of part using methods such as spectrophotometers
For 36%, sludge is put into pickling tank, the sulfuric acid for then putting into 35% concentration carries out pickling to sludge, is sufficiently stirred for 30 points of reaction
Clock, makes pH<2, obtain the sludge containing liquid phase inorganic salts；Sludge containing liquid phase inorganic salts is carried out using floatation thickening method dense
Contracting, concentration time is 30 minutes, obtains desalination sludge and pickle, and desalination sludge is discharged into acidity readjustment pond, hydrogen-oxygen is then added
Change sodium, make pH>6, grab sample partly uses gravimetric method to detect that the content of organic matter, for 58%, uses light splitting light after the desiccation of part
The total content of the method detection inorganic salts such as degree meter is 14%, and inorganic salts remove sludge after 61%, acidity readjustment and enter Treatment of Sludge；
Pickle, which enters in purification pond, backward purification pond, puts into calcium oxide, by pH regulations to 7, must purify liquid and the precipitation containing iron aluminium
Thing, sediment is dehydrated into frame dehydration device, and ring is used after obtaining dewatered sludge and pressing filtering liquid, dewatered sludge addition cement
Brick material is made in die pelleter or Flat die cuber, and purification liquid and pressing filtering liquid then are discharged into sewage-treatment plant.
Embodiment 3：
As shown in Figure 3, sewage plant dewatered sludge, moisture percentage in sewage sludge 80-85%, grab sample, partly using weight are taken
Method detection the content of organic matter be 35%, use after the desiccation of part the methods such as spectrophotometer detection inorganic salts total content for
40%, sludge is put into the quenched pond of sludge, adds water quenched and is diluted to moisture content 95%, into acid dip pickle, then put into
The sulfuric acid of 10% oxalic acid and 20% concentration, is sufficiently stirred for reaction 120 minutes, makes pH<2, obtain the sludge containing liquid phase inorganic salts；
Sludge containing liquid phase inorganic salts is concentrated using gravity concentration method, concentration time is 50 minutes, separate to obtain desalination dirt
Mud and pickle, the pickle pH<2, to desalination sludge carry out once washing and concentrating and separating, obtain once washing supernatant with
Sludge is once washed, the pH of supernatant is once washed<2.5, secondary washing and concentrating and separating are carried out to once washing sludge, two are obtained
Secondary washing supernatant and secondary washing sludge, the pH of secondary washing supernatant<3, pickle, once washing supernatant and secondary water
Wash supernatant and collect to obtain washing lotion, the washing lotion pH<3, desalination sludge is discharged into acidity readjustment pond, sodium hydroxide is then added, makes
pH>6.5, stochastical sampling partly uses gravimetric method to detect the content of organic matter for 55%, using spectrophotometer etc. after the desiccation of part
The total content of method detection inorganic salts is 4%, and inorganic salts remove 90%, and secondary washing sludge enters Treatment of Sludge；Washing lotion is arranged
Enter and purify pond, then put into magnesia into purification pond, by pH regulations to 8, must purify liquid and containing iron al inorganic salt and phosphorus
Sediment, sediment is dehydrated into dehydration device, obtains dehydrated sludge cake and supernatant, and dehydrated sludge cake is containing ammonium magnesium phosphate
Chemical fertilizer raw material, then will purification liquid and supernatant be discharged into sewage-treatment plant.
Embodiment 4：
Sewage treatment plant's dewatered sludge is taken, former mud calorific value 1456Kcal/kg is partly determined using method of oxygen steel bomb, dirt is separately taken
Mud (moisture content 80%) 100g, add water 400ml, is sufficiently stirred for, and adds 20% concentration hydrochloric acid 25ml, adds 20% concentration sulphuric acid
30ml, regulation pH value is sufficiently stirred for 60 minutes to 1.2, is precipitated 40 minutes, is separated to obtain pickle 350ml and sludge 150ml, dirty
Mud determines calorific value 3488Kcal/kg using method of oxygen steel bomb, and sludge calorific value is improved to 1.4 times of former mud, and pickle adds 10%
Sodium hydroxide 10ml, adjusts PH to 4.5, separates out and precipitates and be separated by filtration, must purify liquid 250ml and inorganic sediment, to
Add input hydrochloric acid in inorganic sediment, regulation pH value to 4, gained mixed solution is the flocculant containing molysite and aluminium salt, to
10% concentration magnesium oxide solution 15ml is added in purification liquid, PH to 7.5 is adjusted, is separated out and is precipitated and be separated by filtration, gained precipitation is
For ammonium magnesium phosphate.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (10)
1. a kind of sludge pretreatment technique with desalting effect, located at Treatment of Sludge front end, it is characterised in that：The technique includes
Following steps：
1), sludge is placed in acid dip pickle, inorganic acid is then put into or organic acid carries out pickling, be sufficiently stirred for reaction, then
Separation, obtains desalination sludge and the pickle containing inorganic salts, the pickle pH<2；
2), by step 1) in pickle input purification pond, then to purification pond in add in highly basic, regulation pH to 4-8, react
Liquid and inorganic sediment are purified, the purification liquid enters sewage-treatment plant；
3), by step 2) in inorganic sediment input preparing pool, and add inorganic acid, be sufficiently stirred for reaction, obtain flocculant；
4), by step 1) in desalination sludge input acidity readjustment pond, then add in highly basic, make pH>6, gained reactant is entered
Enter Treatment of Sludge.
2. a kind of sludge pretreatment technique with desalting effect according to claim 1, it is characterised in that：When step 1)
When the moisture content of middle sludge is 85%-99.8%, directly sludge is placed in acid dip pickle；When step 1) in moisture percentage in sewage sludge
During less than 85%, sludge is placed in the quenched pond of sludge, adds water and modulates and be diluted to moisture content for 85-99.8%, then put into acid
In cleaning device.
3. a kind of sludge pretreatment technique with desalting effect according to claim 1, it is characterised in that：Step 1) in
Desalination sludge pickling after at least through once wash after enter back into acidity readjustment pond, and pickle with every time washing after supernatant
Liquid is aggregated into washing lotion, and the washing sludge after last washing enters Treatment of Sludge.
4. a kind of sludge pretreatment technique with desalting effect according to claim 1 or 3, it is characterised in that：Step
1) need to sequentially pass through washing twice after the desalination sludge pickling in and enter back into acidity readjustment pond, desalination sludge is once washed
And separate once to wash supernatant and once wash sludge, to once washing the secondary washing of sludge progress and separating, obtain secondary
Supernatant and secondary washing sludge are washed, the pickle, once washing supernatant are mixed and must washed with secondary washing supernatant
Liquid, the washing lotion pH<3.
5. a kind of sludge pretreatment technique with desalting effect according to claim 3, it is characterised in that：Step 1) in
Separate mode for gravity concentration, floatation thickening, centrifugation or filter.
6. a kind of sludge pretreatment technique with desalting effect according to claim 1, it is characterised in that：Step 1) in
The stirring reaction time be at least 30 minutes.
7. a kind of sludge pretreatment technique with desalting effect according to claim 1, it is characterised in that：It is strong in described
Alkali is the one or more in calcium oxide, calcium hydroxide, sodium hydroxide, magnesia, magnesium hydroxide or potassium hydroxide.
8. a kind of sludge pretreatment technique with desalting effect according to claim 1, it is characterised in that：It is described organic
Acid is oxalic acid, and the inorganic acid is hydrochloric acid, sulfuric acid or nitric acid.
9. a kind of sludge pretreatment technique with desalting effect according to claim 1, it is characterised in that：By step 2)
In sediment input preparing pool, and add sulfuric acid, be sufficiently stirred for reaction, make pH ＜ 4, obtain inorganic flocculating agent；
Or by step 2) in sediment be discharged into sludge dehydration device and be dehydrated, dewatering type is frame dehydration, belt type dehydration
Or centrifugal dehydration, material or as phosphorous chemical fertilizer raw material after dehydration, or add cement and enter prilling granulator brick material is made, granulation is filled
It is set to ring die pelleter or Flat die cuber.
10. a kind of sludge pretreatment technique with desalting effect according to claim 1, it is characterised in that：The dirt
Mud processing includes anaerobic sludge digestion, sludge aerobic compost, sludge anaerobic compost, sludge anhydration burning, sludge high temperature pyrolysis, dirt
Mud protein extraction or sludge protein feed.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106045249A (en) * | 2016-07-15 | 2016-10-26 | 天津壹新环保工程有限公司 | Novel recycling sludge treatment system and treatment method |
| CN106007292A (en) * | 2016-07-15 | 2016-10-12 | 天津壹新环保工程有限公司 | Method and device for respectively extracting and using inorganic matters in sludge |
| CN108059219A (en) * | 2016-11-07 | 2018-05-22 | 天津壹新环保工程有限公司 | A kind of molysite using in sludge prepares the method and device of flocculant |
| CN106277689A (en) * | 2016-11-07 | 2017-01-04 | 天津壹新环保工程有限公司 | A kind of energy-efficient mud multipurpose processing equipment for recycling and method |
| CN107140799B (en) * | 2017-04-26 | 2023-06-16 | 天津壹新环保工程有限公司 | Sludge on-line reduction treatment method and device |
| CN107759036B (en) * | 2017-10-20 | 2023-12-26 | 天津壹新环保工程有限公司 | Treatment method and device for preparing compound fertilizer from sludge |
| CN109553219A (en) * | 2018-12-29 | 2019-04-02 | 四川磊蒙机械设备有限公司 | A kind of method for sludge treatment for sewage treatment plant |
| CN110042243A (en) * | 2019-03-27 | 2019-07-23 | 广东清大同科环保技术有限公司 | A method of processing head ash |
| CN110683622A (en) * | 2019-10-11 | 2020-01-14 | 天津壹新环保工程有限公司 | Method for extracting aluminum in sludge to prepare aluminum-containing flocculant |
| CN110937772A (en) * | 2019-12-11 | 2020-03-31 | 中冶华天工程技术有限公司 | Method for separating organic/inorganic components from sludge |
| CN111088412B (en) * | 2019-12-16 | 2021-07-30 | 霸州环瑞节能科技有限公司 | Acid pickling sludge resource utilization method |
| CN112960874A (en) * | 2021-02-21 | 2021-06-15 | 武汉普乐环境技术有限公司 | Sludge quality-based collection and treatment method for sewage treatment plant |
| CN113480123A (en) * | 2021-08-02 | 2021-10-08 | 江苏洁奥德工程技术有限公司 | Harmless treatment method for pickling sludge |
| CN113880382A (en) * | 2021-11-24 | 2022-01-04 | 天津壹新环保工程有限公司 | Anaerobic sludge recycling treatment system and method |
| CN113880381A (en) * | 2021-11-24 | 2022-01-04 | 天津壹新环保工程有限公司 | Excess sludge modification system and method for providing carbon source for sewage plant |
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| JP3339352B2 (en) * | 1997-02-28 | 2002-10-28 | 日本鋼管株式会社 | Sludge treatment method |
| CN102153267A (en) * | 2011-04-15 | 2011-08-17 | 复旦大学 | Method for modifying and dewatering sludge |
| CN104445799B (en) * | 2014-10-09 | 2016-04-20 | 厦门紫金矿冶技术有限公司 | The treatment process of a kind of high salt, ammonia nitrogen and unmanageable solution of gold smelting plant waste water |
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