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Efficient reduction and harmlessness treatment method for sludge

A technology of harmless treatment and sludge, applied in sludge treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of low degree of sludge dewatering, secondary pollution and high content of heavy metals, Achieve excellent dehydration effect, prevent secondary pollution and low operating cost

Inactive Publication Date: 2020-04-10
肇庆市武大环境技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of low sludge dehydration degree and high heavy metal content in water after sludge dehydration in the prior art, the purpose of the present invention is to provide a method for deep dehydration of municipal sludge and fixing heavy metals in waste water, This method can not only achieve efficient sludge reduction treatment, but also avoid heavy metal secondary pollution of recovered effluent and sludge

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  • Efficient reduction and harmlessness treatment method for sludge
  • Efficient reduction and harmlessness treatment method for sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A sludge dehydration method, the raw materials are: municipal sludge, conditioning agent R and modifying agent FeCl 3 . Specific steps are as follows:

[0038] (1) Transport the raw sludge (with a moisture content of 82wt.%) from a sewage treatment plant in Guangdong Province to the conditioning kettle, and add conditioning agent R (wherein the mass ratio of industrial waste residue is 1:9:3:2 Phosphorus slag, slag, boiling slag and fly ash, the activator is amino triethanol, sodium lignosulfonate, sodium hydroxide, KAl(SO 4 ) 2 12H 2 O and CaSO 4 ; The mass ratio of industrial waste residue, activator, sludge incineration ash and rice straw incineration ash is 20:1:100:3), the addition of conditioner R is 8wt.% of the sludge amount, and the reaction is carried out under agitation 1h;

[0039] (2) The sludge treated by the conditioning tank is pumped to the hydrothermal modification conditioning tank, and the modified conditioning agent FeCl is added 3 , the addi...

Embodiment 2

[0044] A sludge dehydration method, the raw materials are: municipal sludge, conditioning agent R and modifying agent FeCl 3 . Specific steps are as follows:

[0045] (1) Transport the raw sludge (with a moisture content of 82wt.%) from a sewage treatment plant in Guangdong Province to the conditioning kettle, and add conditioning agent R (wherein the mass ratio of industrial waste residue is 1:9:3:2 Phosphorus slag, slag, boiling slag and fly ash, the activator is amino triethanol, sodium lignosulfonate, sodium hydroxide, KAl(SO 4 ) 2 12H 2 O and CaSO 4 ; The mass ratio of industrial waste residue, activator, sludge incineration ash and rice straw incineration ash is 20:1:100:3), the addition of conditioner R is 15wt.% of the sludge amount, and the reaction is carried out under agitation 1.5h;

[0046] (2) The sludge treated by the conditioning tank is pumped to the hydrothermal modification conditioning tank, and the modified conditioning agent FeCl is added 3 , the a...

Embodiment 3

[0051] A sludge dehydration method, the raw materials are: municipal sludge, conditioning agent R and modifying agent FeCl 3 . Specific steps are as follows:

[0052] (1) Transport the raw sludge (with a moisture content of 82wt.%) from a sewage treatment plant in Guangdong Province to the conditioning kettle, and add conditioning agent R (wherein the mass ratio of industrial waste residue is 1:9:3:2 Phosphorus slag, slag, boiling slag and fly ash, the activator is amino triethanol, sodium lignosulfonate, sodium hydroxide, KAl(SO 4 ) 2 12H 2 O and CaSO 4 ; The mass ratio of industrial waste residue, activator, sludge incineration ash and rice straw incineration ash is 23:1:100:3), the addition of conditioner R is 15wt.% of the sludge amount, and the reaction is carried out under agitation 1.5h;

[0053] (2) The sludge treated by the conditioning tank is pumped to the hydrothermal modification conditioning tank, and the modified conditioning agent FeCl is added 3 , the a...

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Abstract

The invention discloses an efficient reduction and harmlessness treatment method for sludge, which comprises the following steps: stirring sludge and a conditioner R consisting of sludge incinerationash, industrial waste residues, an excitant and straw incineration ash to react to obtain pre-conditioned sludge; and adding a flocculating agent into the pre-conditioned sludge, carrying out hydrothermal reaction, and carrying out solid-liquid separation on a hydrothermal reaction product to obtain dry sludge. The efficient reduction and harmlessness treatment method is good in dewatering effect, the content of heavy metal in the dewatered sludge is low, harmlessness and reduction of the sludge are achieved, and secondary pollution is reduced.

Description

technical field [0001] The invention relates to a sludge treatment method, in particular to a method for highly efficient sludge reduction treatment and harmless treatment, and belongs to the technical field of sludge treatment. Background technique [0002] According to data from the China Environmental Statistical Yearbook, the amount of sludge generated in my country increased from 54.27 million tons to 74.36 million tons from 2010 to 2017, and it is expected that the annual amount of sludge generated will reach 90 million tons in 2020. At present, my country's sludge treatment methods mainly include landfill, composting, natural drying, incineration, etc., but landfill is still the main method (65%). In addition, my country's urban sewage treatment enterprises have insufficient disposal capacity and backward disposal methods. Without standardized treatment, it directly causes "secondary pollution" and poses a serious threat to the ecological environment. [0003] The bas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/143C02F11/122
CPCC02F11/122C02F11/143
Inventor 侯浩波戴薇雷杰妮黄一洪
Owner 肇庆市武大环境技术研究院
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