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Sludge dewatering conditioning agent and use method thereof

A sludge dewatering and conditioning agent technology, applied in water/sludge/sewage treatment, sludge treatment, dehydration/drying/concentrated sludge treatment, etc. problem, to achieve the effect of good air permeability

Inactive Publication Date: 2015-06-24
GUANGDONG YUEKE ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN101955312B discloses a sludge conditioner and its use method. The conditioner uses the addition of biological enzymes and is used for the treatment of biochemical sludge, using acid and enzymes to destroy the extracellular polymer (Extracellular polymeric substance, EPS) in the sludge, Improving the dehydration effect can increase the sludge dryness from 20%-30% to 40%-50%; however, the conditioner requires cellulose and hemicellulase, and the conditioning time is as high as 240 minutes, the cost is high, and High organic matter content cannot avoid the problem that the filter cake is easy to compress and deform
[0007] CN 101967035A discloses a conditioner for municipal sludge dehydration. The conditioner is prepared from anionic PAM and chitosan, which effectively reduces the amount of anionic PAM and improves sludge dewatering performance; the disadvantage is that the conditioner is an organic component, and the cost is low. High, refractory and biologically toxic. In addition, without inorganic conditioners, it is difficult to form a strong network skeleton structure, which cannot completely solve the problem of easy compression and deformation of organic matter.

Method used

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  • Sludge dewatering conditioning agent and use method thereof

Examples

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Embodiment 1

[0029] 1) Take concentrated sludge with a moisture content of 98.6% from an urban sewage treatment plant, and add a conditioner composed of the following mass percentages: 13% asbestos tailings, 30% carbide slag, 8% serpentine, 9% dolomite, kaolin 5%, diatomaceous earth 5%, bentonite 5%, clay 5%, sodium humate 5%, ferric chloride 4%, aluminum chloride 3%, pyrolusite 4%, sodium hypochlorite 2.5%, lauryl Sodium benzenesulfonate 1.0%, polysorbate 0.5%, the dosage of conditioner is 1.2% of the sludge amount;

[0030] 2) How to use: first add ferric chloride and aluminum trichloride to the sludge, stir rapidly for about 1 minute, then add pyrolusite and sodium hypochlorite, and continue stirring rapidly for 3 minutes; then add sodium humate and dodecylbenzenesulfonate Sodium acid and polysorbate, continue to stir rapidly for about 1min, then add bentonite and clay, continue to stir rapidly for 2min; again, add asbestos tailings, carbide slag, serpentine, dolomite, kaolin and diatom...

Embodiment 2

[0033] 1) Take concentrated sludge with a water content of 97.5% in ammonia nitrogen wastewater from a coking plant, and add a conditioning agent composed of the following mass percentages: 10% asbestos tailings, 35% carbide slag, 6% serpentine, 9% dolomite, and kaolin 3%, diatomaceous earth 7%, bentonite 6%, clay 4%, potassium humate 5%, polyaluminum sulfate 5%, pyrolusite 5%, potassium hypochlorite 3%, cetyl pyridinium bromide 1%, alkanes Alcohol amide 1%, the dosage of conditioning agent is 2.1% of the sludge amount;

[0034] 2) How to use: first add iron salt and / or aluminum salt to the sludge, stir rapidly for about 1.5min, then add pyrolusite and potassium hypochlorite, continue stirring rapidly for 3.5min; then add potassium humate and cetyl bromide Add pyridine and alkyl alcohol amide, continue to stir rapidly for about 1.5min, then add bentonite and clay, continue to stir rapidly for 2.5min; again, add asbestos tailings, carbide slag, serpentine, dolomite, kaolin and ...

Embodiment 3

[0037]1) Take the concentrated sludge with a water content of 93.8% in organic waste water from textile mills, add the following conditioning agent in mass percent: 7% asbestos tailings, 33% carbide slag, 8% serpentine, 7% dolomite, kaolin 9%, diatomite 8%, bentonite 5%, clay 3%, sodium humate 3%, iron sulfate 5%, polyaluminum sulfate 2%, pyrolusite 4%, sodium hypochlorite 3.5%, dodecylbenzenesulfonic acid Sodium 1%, alkanolamide 1.5%, conditioner dosage is 2.5% of sludge volume;

[0038] 2) How to use: first add ferric sulfate and polyaluminum sulfate to the sludge, stir rapidly for about 2 minutes, then add pyrolusite and sodium hypochlorite, and continue stirring rapidly for 3 minutes; then add sodium humate, sodium dodecylbenzenesulfonate and alkanes Alcohol amide, continue to stir rapidly for about 1.5 minutes, then add bentonite and clay, continue to stir rapidly for 3 minutes; again, add asbestos tailings, carbide slag, serpentine, dolomite, kaolin and diatomite, and co...

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Abstract

The invention provides a sludge dewatering conditioning agent and a use method thereof. The conditioning agent consists of a coagulating agent, a coagulant aid, an oxidant, an ion exchanger and a surfactant. When used, the sludge dewatering conditioning agent is added into sludge according to a certain proportion in a certain manner, can form a grid structure with an effect of adsorbing bridges, and also has relatively strong ion exchange and surface activation wall-breaking capacities, and the mutual synergistic action can greatly improve the sludge dewatering performance. The sludge dewatering conditioning agent has the advantages of simple process flow, high dewatering rate, strong applicability, capability of batch processing and the like.

Description

technical field [0001] The invention relates to the technical field of sewage sludge treatment, in particular to a sludge dehydration conditioner and a use method thereof. Background technique [0002] With the rapid development of cities and industries, the discharge of urban domestic sewage and industrial sewage is increasing, so that the amount of by-product sludge produced in sewage treatment is increasing. How to treat these sludge has also become a social development. unavoidable problem. At present, there are three main methods of sludge treatment: landfill, composting and incineration. Sludge has the characteristics of "four highs": first, high moisture content; second, high organic matter content, which is easy to rot and odor; third, heavy metal content Fourth, the germ content is high, containing a large number of bacteria, parasites, and viruses. Without harmless treatment, the sludge is discarded arbitrarily and simply landfilled, which is easy to pollute air,...

Claims

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Application Information

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IPC IPC(8): C02F11/14C02F11/06C02F11/00
CPCC02F11/14C02F11/06C02F11/122C02F11/123C02F11/126C02F11/127C02F2303/06
Inventor 张春山肖宇波方斌林斌
Owner GUANGDONG YUEKE ENVIRONMENTAL PROTECTION TECH
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