Compounded sludge dewatering conditioner and application method thereof

Abstract

The invention discloses a compounded sludge dewatering conditioner and belongs to the technical field of sludge treatment. The compounded sludge dewatering conditioner is prepared through compounding a sludge conditioner A and a sludge conditioner B, wherein the sludge conditioner A is prepared through compounding the following ingredients in parts by weight: 20-30 parts of fly ash, 10-20 parts of quicklime powder, 10-20 parts of magnesia, 20-30 parts of polyaluminum ferric chloride; the sludge conditioner B is an acetic solution of chitosan. The invention further discloses a method of application of the compounded sludge dewatering conditioner.

Description

Technical field

[0001] The invention belongs to the technical field of sludge treatment, and specifically relates to a composite sludge dewatering conditioner and an application method thereof. Background technique

[0002] Sludge is the final product of sewage treatment. It has the characteristics of large production volume, high organic content, complex sludge composition, strong hydrophilicity, high water content (generally above 95% to 99%), and large volume. Treatment has become a heavy economic burden for sewage treatment plants.

[0003] The current sludge treatment and disposal methods mainly include incineration, composting, landfilling, and comprehensive utilization. Before sludge treatment and disposal, the sludge must be dehydrated. The purpose is to enrich the solids and reduce the volume of sludge. Final disposal creates conditions; sludge conditioning can change the physical and chemical properties of sludge, thereby improving the dewatering performance of sludge an...

Examples

Embodiment 1

[0023] A composite sludge dewatering conditioner, which is compounded by sludge conditioner A and sludge conditioner B. The sludge conditioner A is prepared by stirring and mixing the following components by weight for 5 minutes: fly ash 20 Parts, 20 parts quicklime powder, 10 parts magnesium oxide, 30 parts polyaluminum ferric chloride, rotating speed 20r / min; sludge conditioner B is chitosan acetic acid solution, 10 parts chitosan is dissolved in 1% acetic acid The sludge conditioner B is prepared in the solution with a concentration of 1g / L.

[0024] The application method of compound sludge dewatering conditioner includes the following steps:

[0025] 1) 30 parts of polyaluminum ferric chloride, 30 parts of fly ash, 20 parts of quicklime powder, and 10 parts of magnesium oxide are stirred and mixed for 5 minutes at a speed of 20r / min to prepare sludge conditioner A;

[0026] 2) Dissolve 10 parts of chitosan in a 1% acetic acid solution to prepare a solution with a concentration ...

Embodiment 2

[0031] A composite sludge dewatering conditioner, which is compounded by sludge conditioner A and sludge conditioner B. The sludge conditioner A is prepared by stirring and mixing the following components by weight for 10 minutes: polyaluminum chloride 30 parts of iron, 25 parts of fly ash, 20 parts of quicklime powder, 10 parts of magnesium oxide, rotation speed 30r / min; sludge conditioner B is chitosan acetic acid solution, 10 parts of chitosan is dissolved in 1% acetic acid The sludge conditioner B is prepared in the solution with a concentration of 1g / L.

[0032] The application method of compound sludge dewatering conditioner includes the following steps:

[0033] 1) 30 parts of polyaluminum ferric chloride, 25 parts of fly ash, 20 parts of quicklime powder, and 10 parts of magnesium oxide are stirred and mixed for 10 minutes at a speed of 30r / min to prepare sludge conditioner A;

[0034] 2) Dissolve 15 parts of chitosan in a 1% acetic acid solution to prepare a solution with a...

Embodiment 3

[0039] A composite sludge dewatering conditioner, composed of sludge conditioner A and sludge conditioner B, sludge conditioner A is made by mixing the following components by weight for 8 minutes: polyaluminum chloride 20 parts of iron, 30 parts of fly ash, 10 parts of quicklime powder, 20 parts of magnesium oxide, speed of 25r / min; sludge conditioner B is chitosan acetic acid solution, 10 parts of chitosan is dissolved in 1% acetic acid The sludge conditioner B is prepared in the solution with a concentration of 1g / L.

[0040] The application method of compound sludge dewatering conditioner includes the following steps:

[0041] 1) Stir and mix 20 parts of polyaluminum ferric chloride, 30 parts of fly ash, 10 parts of quicklime powder, and 20 parts of magnesium oxide for 8 minutes at a speed of 25r / min to prepare sludge conditioner A;

[0042] 2) Dissolve 20 parts of chitosan in a 1% acetic acid solution to prepare a solution with a concentration of 2g / L to prepare sludge conditio...

Technical field

[0001] The invention belongs to the technical field of sludge treatment, and specifically relates to a composite sludge dewatering conditioner and an application method thereof. Background technique

[0002] Sludge is the final product of sewage treatment. It has the characteristics of large production volume, high organic content, complex sludge composition, strong hydrophilicity, high water content (generally above 95% to 99%), and large volume. Treatment has become a heavy economic burden for sewage treatment plants.

[0003] The current sludge treatment and disposal methods mainly include incineration, composting, landfilling, and comprehensive utilization. Before sludge treatment and disposal, the sludge must be dehydrated. The purpose is to enrich the solids and reduce the volume of sludge. Final disposal creates conditions; sludge conditioning can change the physical and chemical properties of sludge, thereby improving the dewatering performance of sludge an...

Examples

Embodiment 1

[0023] A composite sludge dewatering conditioner, which is compounded by sludge conditioner A and sludge conditioner B. The sludge conditioner A is prepared by stirring and mixing the following components by weight for 5 minutes: fly ash 20 Parts, 20 parts quicklime powder, 10 parts magnesium oxide, 30 parts polyaluminum ferric chloride, rotating speed 20r / min; sludge conditioner B is chitosan acetic acid solution, 10 parts chitosan is dissolved in 1% acetic acid The sludge conditioner B is prepared in the solution with a concentration of 1g / L.

[0024] The application method of compound sludge dewatering conditioner includes the following steps:

[0025] 1) 30 parts of polyaluminum ferric chloride, 30 parts of fly ash, 20 parts of quicklime powder, and 10 parts of magnesium oxide are stirred and mixed for 5 minutes at a speed of 20r / min to prepare sludge conditioner A;

[0026] 2) Dissolve 10 parts of chitosan in a 1% acetic acid solution to prepare a solution with a concentration ...

Embodiment 2

[0031] A composite sludge dewatering conditioner, which is compounded by sludge conditioner A and sludge conditioner B. The sludge conditioner A is prepared by stirring and mixing the following components by weight for 10 minutes: polyaluminum chloride 30 parts of iron, 25 parts of fly ash, 20 parts of quicklime powder, 10 parts of magnesium oxide, rotation speed 30r / min; sludge conditioner B is chitosan acetic acid solution, 10 parts of chitosan is dissolved in 1% acetic acid The sludge conditioner B is prepared in the solution with a concentration of 1g / L.

[0032] The application method of compound sludge dewatering conditioner includes the following steps:

[0033] 1) 30 parts of polyaluminum ferric chloride, 25 parts of fly ash, 20 parts of quicklime powder, and 10 parts of magnesium oxide are stirred and mixed for 10 minutes at a speed of 30r / min to prepare sludge conditioner A;

[0034] 2) Dissolve 15 parts of chitosan in a 1% acetic acid solution to prepare a solution with a...

Embodiment 3

[0039] A composite sludge dewatering conditioner, composed of sludge conditioner A and sludge conditioner B, sludge conditioner A is made by mixing the following components by weight for 8 minutes: polyaluminum chloride 20 parts of iron, 30 parts of fly ash, 10 parts of quicklime powder, 20 parts of magnesium oxide, speed of 25r / min; sludge conditioner B is chitosan acetic acid solution, 10 parts of chitosan is dissolved in 1% acetic acid The sludge conditioner B is prepared in the solution with a concentration of 1g / L.

[0040] The application method of compound sludge dewatering conditioner includes the following steps:

[0041] 1) Stir and mix 20 parts of polyaluminum ferric chloride, 30 parts of fly ash, 10 parts of quicklime powder, and 20 parts of magnesium oxide for 8 minutes at a speed of 25r / min to prepare sludge conditioner A;

[0042] 2) Dissolve 20 parts of chitosan in a 1% acetic acid solution to prepare a solution with a concentration of 2g / L to prepare sludge conditio...