Riverway sludge treatment method

A treatment method and technology for river silt, applied in sludge treatment, biological sludge treatment, water/sludge/sewage treatment, etc. cost effect

Active Publication Date: 2018-03-20
浙江山海建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mechanical treatment can only deal with interstitial water, and has poor dehydration effect on other forms of water. Therefore, developing a sludge treatment method with a higher dehydration rate has certain production and application value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: A method for treating river silt. First, a grab boat or a dredger is used to grab or blow the silt at the bottom of the river onto a barge, tugboat, or a muddy area on the bank, and then the accumulated silt (including The amount of water is 80wt%, sampling 1 ton) according to the following steps:

[0031] (1) Mechanical dehydration

[0032] ① First settling dehydration: using natural settling for dehydration, the supernatant is removed after settling for 30 minutes to obtain sludge with a water content of 30 wt%;

[0033] ②Second settling and dewatering: before the second settling and dewatering, add flocculant to the sludge, the mass ratio of flocculant to sludge is 3%:1; flocculant includes activated carbon, polyacrylamide and polyaluminum chloride, and flocculant The mass ratio of polyacrylamide to polyaluminum chloride is 0.6:5:1; the supernatant is removed after settling for 10 minutes to obtain a sludge with a water content of 10 wt%;

[0034] ③Centrifugal de...

Embodiment 2

[0043] Example 2: A method for treating river silt. First, a grab boat or a dredger is used to grab or blow the silt at the bottom of the river onto a barge, tugboat or mud area on the bank, and then the accumulated silt (including The amount of water is 85wt%, sampling 2 tons) Follow the steps below:

[0044] (1) Mechanical dehydration

[0045] ①The first settling dehydration: the natural settling dehydration is adopted, and the supernatant is removed after settling for 30 minutes to obtain sludge with a water content of 40 wt%;

[0046] ②Second settling and dewatering: before the second settling and dewatering, add flocculant to the sludge, the mass ratio of flocculant to sludge is 5%:1; flocculant includes activated carbon, polyacrylamide and polyaluminum chloride, and flocculant The mass ratio of polyacrylamide to polyaluminum chloride is 0.8:6:1; the supernatant is removed after settling for 10 minutes to obtain a sludge with a water content of 15 wt%;

[0047] ③Centrifugal dewa...

Embodiment 3

[0056] Example 3: A method for treating river silt. First, a grab boat or a dredger is used to catch or blow the silt at the bottom of the river onto a barge, tugboat or mud area on the shore, and then the accumulated silt (including The amount of water is 90% by weight, and 0.8 tons is sampled.) Follow the steps below:

[0057] (1) Mechanical dehydration

[0058] ①The first settling dehydration: the natural settling is used for dehydration, the supernatant is removed after settling for 30 minutes to obtain a sludge with a water content of 35wt%;

[0059] ②Second settling and dewatering: before the second settling and dewatering, add flocculant to the sludge, the mass ratio of flocculant to sludge is 2%:1; flocculant includes activated carbon, polyacrylamide and polyaluminum chloride, and flocculant The mass ratio of polyacrylamide to polyaluminum chloride is 0.5:4:1; the supernatant is removed after settling for 10 minutes to obtain a sludge with a water content of 18 wt%;

[0060] ...

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Abstract

The invention discloses a riverway sludge treatment method. The riverway sludge treatment method comprises the following steps: firstly catching or hydraulic filling sludge at river bottom to a barge,a tugboat or a shore sludge piling region by a grab dredger or dredger, and then treating the accumulated sludge according to the following steps: (1) carrying out mechanical dehydration until watercontent of the sludge is lower than 15%; (2) adding microorganisms into the sludge treated in the step (1), stirring and carrying out reaction, carrying out air blast and ventilation until the water content of sludge is lower than 5%; and (3) taking the sludge treated in the step (2), and carrying out electroosmotic dehydration to constant weight. The method disclosed by the invention has the effect of improving dehydration rate.

Description

Technical field [0001] The invention relates to a treatment method of river silt. Background technique [0002] The unconsolidated soft fine-grained or extremely fine-grained soil formed by physical chemistry and biochemical action deposited in static water or slow flowing water environment is silt. Silt is a very effective biological resource, which is rich in organic matter and nutrient elements such as N and P. However, the sludge contains harmful substances such as toxic and harmful heavy metals and pathogenic bacteria. If it is not treated and stacked arbitrarily, it will cause environmental pollution. Therefore, the treatment of sludge is more important. [0003] The Chinese patent with application publication number CN106836357A and application publication date on June 13, 2017 discloses a river dredging system, which first cleans out the river sludge, then converts the sludge into mud, and sends the mud to the post-treatment system . [0004] Since the sludge contains cons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14C02F11/12C02F11/02
CPCC02F11/02C02F11/121C02F11/127C02F11/14
Inventor 倪学理王江涛倪宗森倪宗觉
Owner 浙江山海建设有限公司
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