CN103626378A

CN103626378A - Sludge composite conditioner and conditioning method using same

Info

Publication number: CN103626378A
Application number: CN201310525770.3A
Authority: CN
Inventors: 蒋家超; 沈森源; 毛缜; 商晓甫; 甄广印; 赵由才
Original assignee: China University of Mining and Technology CUMT
Current assignee: China University of Mining and Technology CUMT
Priority date: 2013-10-31
Filing date: 2013-10-31
Publication date: 2014-03-12

Abstract

The invention belongs to the technical field of sludge treatment devices and particularly relates to a sludge composite conditioner and a conditioning method using the same. The sludge composite conditioner disclosed by the invention consists of conditioners A, B and C, wherein major components of the conditioners A, B and C are respectively hydrogen peroxide, ferrite and persulfate. The specific conditioning method comprises the following steps: (1), analyzing content of volatile suspended solid (VSS) in sludge, and calculating and respectively weighing/measuring a certain amount of the conditioners A, B and C according to a rule that every gram of VSS needs 1mmol-3mmol of the conditioner A, 1mmol-3mmol of the conditioner B and 1mmol-3mmol of the conditioner C; (2), adding the weighed/measured conditioners A, B and C into the sludge, and carrying out mechanical dehydrating operation onto the sludge after stirring for 1 minute-10 minutes. The method disclosed by the invention is simple, dosage of conditioners is less, cost is low, dehydrating effect is obvious, and sludge moisture content can be lowered to less than 60% from 97%-99%; after being dehydrated, the sludge can be directly filled and buried, applied in agriculture or used for producing building materials, and the like.

Description

A kind of mud composite conditioner and Opsonizing method thereof

Technical field

The invention belongs to sludge treatment disposal technology field, relate to a kind of mud composite conditioner and Opsonizing method thereof.

Background technology

In the last few years, along with the increase of the various sewage of China, the raising of wastewater treatment rate and the processing degree of depth, sludge yield was increasing.According to incompletely statistics, within 2012, China's mud (in water ratio 80%) that only urban wastewater treatment firm produces has just surpassed 2,500 ten thousand t, and annual growth is greater than 10%.In mud, often contain large amount of organic, water ratio is high, and dewatering is poor, has a strong impact on mud subsequent disposal and disposes effect.Sludge conditioning can improve dewatering performance of sludge, is to improve mud (particularly high-moisture percentage organic sludge) to process the most important pretreatment process of disposing effect and recycling.

Sludge conditioning mainly comprises physics conditioning, the large class methods of chemical conditioning two.Wherein, chemical conditioning, because the features such as simple to operate, conditioning effect is stable are widely used, especially for the organic sludge of high-moisture percentage, adopts chemical conditioning method more.When mud is carried out to chemical conditioning, the chemical agent (as aluminium salt, molysite, polymer-inorganic salt, polyacrylamide etc.) with coagulation is the most general amendment of current engineering application.To adding this type of medicament in mud, can make the fine particle cohesion in mud become large, reduce sludge specific resistance, improve sludge dewatering effect.Yet, in mud, often contain a large amount of organic matters, this type of medicament is difficult to remove surface-bonded water and the cell interior water of organic cell, cause sludge dewatering after moisture content of the cake still 75% ~ 80%, be difficult to further reduction, and conditioning cost is expensive.According to the relevant mud standard of China and technical policy, though moisture percentage in sewage sludge is down to 80%, can meet the requirement of dispatching from the factory of urban wastewater treatment firm mud, far not reach landfill (water ratio < 60%), the requirement of control oneself disposal such as burning (water ratio < 50%), agricultural (water ratio < 60%), land reclamation (water ratio < 65%) or recycling.Along with China's mud annual production is increasing, how to develop sludge conditioning technology simple to operate, economical and efficient, the water ratio of mud cake after dewatering is reduced has greatly become problem in science urgently to be resolved hurrily, and destroy sludge structure, impel Sludge Surface, in conjunction with the release of water and cell interior water, is crucial.

Summary of the invention

The object of the present invention is to provide a kind of mud composite conditioner and Opsonizing method thereof of simple to operate, economical and efficient, utilize this composite conditioner and Opsonizing method thereof can make moisture percentage in sewage sludge be down to below 60% from 97% ~ 99%, thereby meet, subsequent disposal is disposed and the requirement of recycling.

For achieving the above object, the present invention has proposed a kind of mud composite conditioner with strong oxidizing property energy on the basis of batch experiment, this composite conditioner can obviously destroy mud flco and cellularstructure, impel Sludge Surface in conjunction with a large amount of releases of water and cell interior water, thereby greatly improve dewatering performance of sludge.The mud composite conditioner that the present invention proposes is comprised of amendment A, B and C, and the main component of amendment A, B and C is respectively hydrogen peroxide, ferrous salt, persulphate.Concrete sludge conditioning method is: (1) analyzes organic (VSS) content of mud, the proportioning that needs amendment A 1 ~ 3 mmol, amendment B 1 ~ 3 mmol, conditioner C 1 ~ 3 mmol according to every gram of VSS, calculates and divides have another name called/measure a certain amount of amendment A, amendment B and conditioner C; (2) the amendment A that claims/measure, amendment B and conditioner C are added in mud, can carry out mechanical dehydration operation to mud after stirring 1 ~ 10 min.

Mud composite conditioner provided by the invention and Opsonizing method has the following advantages and effect:

1. mud composite conditioner provided by the invention is comprised of inorganic raw material, cheap, be easy to get, adding less, can obviously reduce sludge dewatering cost, and dehydrating effect good (after mechanical dehydration, moisture percentage in sewage sludge can be down to below 60% from 97% ~ 99%).

2., while utilizing composite conditioner conditioning mud provided by the invention, method is simple, convenient operation.

3. mud composite conditioner provided by the invention, can effectively destroy mud flco and cellularstructure, the high-moisture percentage organic sludge that the annual production of the current China of special suitable treatment is large, dewater difficult.Through the mud of conditioning dehydration, can send to landfill, burning, agricultural or for the production of material of construction etc., improve that mud subsequent disposal is disposed and the effect of recycling.

Embodiment

Embodiment 1

The mud of certain sludge of sewage treatment plant concentration basin of take is conditioning object, knows by analysis: moisture percentage in sewage sludge 97.2%, organic (VSS) content 42.9% of dewatered sludge.Experimental result shows, needs the proportioning of amendment A 1.2 mmol, amendment B 1.6 mmol, conditioner C 1.8 mmol according to every gram of VSS, calculates and divides have another name called/measure amendment A, B and C, be added in mud, mechanical stirring 5 min, centrifuge dehydration, recording moisture content of the cake is 55.6%.

Embodiment 2

The press filtration mud in certain sludge of sewage treatment plant dehydration workshop of take is conditioning object, knows by analysis: moisture percentage in sewage sludge 78.6%, organic (VSS) content 35.2% of dewatered sludge.During experiment, first in mud, add deionized water and stir, being mixed with the mud of water ratio 99%.Experimental result shows, needs the proportioning of amendment A 2.6 mmol, amendment B 2.5 mmol, conditioner C 1.8 mmol according to every gram of VSS, calculates and divides have another name called/measure amendment A, B and C, be added in mud, mechanical stirring 2 min, after vacuum filtration, recording moisture content of the cake is 50.1%.

Embodiment 3

Yi Mou factory oily sludge is conditioning object, knows by analysis: moisture percentage in sewage sludge 84.0%, organic (VSS) content 77.3% of dewatered sludge.Experimental result shows, the proportioning that needs amendment A 2.8 mmol, amendment B 2.7 mmol, conditioner C 2.9 mmol according to every gram of VSS, calculates and divides have another name called/measure amendment A, B and C, mechanical stirring 9 min, after centrifuge dehydration, recording moisture content of the cake is 58.9%.

Claims

1. a mud composite conditioner, is characterized in that, described mud composite conditioner is comprised of amendment A, B and C.

2. mud composite conditioner according to claim 1, is characterized in that, described amendment A be take the mixture that hydrogen peroxide is main component.

3. mud composite conditioner according to claim 1, is characterized in that, described amendment B be take the mixture that ferrous salt is main component.

4. mud composite conditioner according to claim 1, is characterized in that, described conditioner C is to take the mixture that persulphate is main component.

5. amendment A according to claim 2, is characterized in that, described hydrogen peroxide refers to pure hydrogen peroxide or superoxol.

6. amendment B according to claim 3, is characterized in that, described ferrous salt refers to ferrous sulfate, iron protochloride or can discharge other ferrous salts of ferrous ion, or any proportioning mixture of above-mentioned two or more materials.

7. conditioner C according to claim 4, is characterized in that, described persulphate refers to Sodium Persulfate, Potassium Persulphate or can discharge other persulphates of persulfate, or any proportioning mixture of above-mentioned two or more materials.

8. a sludge conditioning method, mainly comprises the following steps:

(1) analyze organic (VSS) content of mud, according to every gram of VSS, need the proportioning of amendment A 1 ~ 3 mmol, B 1 ~ 3 mmol, C 1 ~ 3 mmol, calculate and divide have another name called/measure a certain amount of amendment A, B and C;

(2) the amendment A, the B that claim/measure and C are added in mud, can carry out mechanical dehydration operation to mud after stirring 1 ~ 10 min.

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