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Compound sludge dewatering conditioner adaptable to technology for preparation of odorless fuel rods from excess sludge as well as preparation method and application of conditioner

A technology for sludge dewatering and excess sludge, applied in the direction of dewatering/drying/concentrating sludge treatment, etc., can solve the problems of large amount of chemicals added, insignificant conditioning effect, affecting the comprehensive utilization of sludge, etc. The method is simple and the effect of reducing the cost of sludge incineration

Inactive Publication Date: 2015-09-09
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the amount of medicament added is large, it cannot act on the water inside the cells, the conditioning effect is not significant, and the addition of conditioners affects the comprehensive utilization of subsequent sludge and other problems that need to be solved urgently.

Method used

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  • Compound sludge dewatering conditioner adaptable to technology for preparation of odorless fuel rods from excess sludge as well as preparation method and application of conditioner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] First of all, according to the national standard, the selected municipal solid waste, 80% water content residual sludge and biomass and aerobic water treatment produce 97% water content residual sludge, according to the mass ratio of components according to SiO 2 10%: Al 2 o 3 10%: Fe 2 o 3 2%: CaO 1.0%: C 50%: N 2%, the rest are elements such as hydrogen and oxygen, mixed evenly, and ventilating the mixture at 5L / min / kg for 7 days to obtain a dry sludge dehydration conditioner. Adding the sludge conditioner to the sludge, the amount of which accounts for 10% of the dry weight of the sludge, stirring evenly, repeating the ventilating step, and dehydrating the sludge through biological drying.

Embodiment 2

[0026] First of all, according to the national standard, the selected municipal solid waste, sludge and biomass and aerobic water treatment will produce 97% water residue sludge, according to the mass ratio of the components according to SiO 2 15%: Al 2 o 3 8%: Fe 2 o 3 5%: CaO 0.5%: C 35%: N 1.4%, the rest are elements such as hydrogen and oxygen, mixed evenly, ventilated the mixture at 15L / min / kg for 12 days, and obtained a dry sludge dehydration conditioner. Adding the sludge conditioner to the sludge, the amount of which accounts for 30% of the mass percentage of the dry weight of the sludge, stirring evenly, repeating the ventilating step, and the sludge undergoes biological drying and dehydration.

Embodiment 3

[0028] First of all, according to the national standard, the selected municipal solid waste, sludge and biomass and aerobic water treatment will produce 97% water residue sludge, according to the mass ratio of the components according to SiO 2 20%: Al 2 o 3 5%: Fe 2 o 3 10%: CaO 10%: C 15%: N 0.6%, the rest are elements such as hydrogen and oxygen, mixed evenly, and ventilating the mixture at 30L / min / kg for 20 days to obtain a dry sludge dehydration conditioner. Adding the sludge conditioner to the sludge, the amount of which accounts for 40% of the dry weight of the sludge by mass, stirring evenly, repeating the ventilating step, and the sludge undergoes biological drying and dehydration.

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Abstract

The invention relates to a compound sludge dewatering conditioner adaptable to a technology for preparation of odorless fuel rods from excess sludge as well as a preparation method and an application of the conditioner. The conditioner comprises components in percentage by mass as follows: 1%-20% of SiO2, 5%-10% of Al2O3, 1%-10% of Fe2O3, 0.5%-10% of CaO, 15%-50% of C and 0.6%-2% of N. The preparation method comprises steps as follows: fly ash, municipal solid waste, sludge, biomass and excess sludge which contains 97% of moisture and is produced by anaerobic water treatment are mixed and ventilated for 7-20 days, and the conditioner is obtained. The conditioner has the advantages that sludge is dewatered with a lysis technology, the conditioner is non-toxic and harmless and cannot cause secondary pollution to the environment, the dewatering cost is low and the like; when the conditioner is applied to deep sludge dewatering, the method is simple, the dewatering rate can be adjusted according to comprehensive utilization application of the sludge, the moisture can be decreased to be lower than 30%, preparation of the odorless sludge fuel rods is facilitated, and the sludge incineration cost is reduced.

Description

technical field [0001] The invention belongs to the field of sludge dehydration composite conditioner and its preparation, in particular to a sludge dehydration composite conditioner adapting to the preparation process of excess sludge odorless fuel rods and its preparation method and application. Background technique [0002] Sludge is a viscous substance produced in the process of sewage treatment. It is mainly composed of aerobic and anaerobic microorganisms. It has a high content of organic matter and is closely combined with water. Generally, the water content of the sludge in the secondary sedimentation tank of the sewage plant is 97% to 99%, of which the interstitial water accounts for about 70%, the capillary water accounts for about 20%, the adsorbed water is about 7%, and the intracellular water is about 3%. At present, after sedimentation and dehydration of sewage plant sludge, the water content is 75% to 85%. At this time, the water form in the sludge is mainly a...

Claims

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Application Information

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IPC IPC(8): C02F11/14
Inventor 李登新蔡文倍
Owner DONGHUA UNIV
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