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A method for reducing the moisture content of sludge

A water content and sludge technology, which is applied in water/sludge/sewage treatment, sludge treatment, biological sludge treatment, etc., can solve the problem of low efficiency in reducing water content, and achieve increased sludge incineration and environmentally friendly Effects of pollution, simple ingredients

Active Publication Date: 2021-08-03
GUANGXI NANNING WATERWORKS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the existing problems of low efficiency in reducing moisture content, the present invention provides a method for reducing the moisture content of sludge to improve sludge treatment efficiency

Method used

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  • A method for reducing the moisture content of sludge

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Based on 100 parts of sludge, prepare materials according to the following components by mass:

[0018] 7 parts of cationic polyacrylamide Ⅰ, 1.8 parts of cationic polyacrylamide Ⅱ, 0.7 parts of cationic polyacrylamide Ⅲ, 0.7 parts of sodium acetate, 0.4 parts of Candida utilis, 1.5 parts of Rhodopseudomonas palustris, the particle size is 150 mesh 12 parts of sepiolite powder, 17 parts of activated carbon with a particle size of 320 mesh;

[0019] (2) Add the cationic polyacrylamide I of step (1) to 100 parts of sludge, keep stirring for 40 minutes, then add sodium acetate and cationic polyacrylamide II in sequence, keep stirring for 40 minutes, then add Candida utilis , continue to feed hot air at 30°C and supply oxygen for 24 hours, stir from time to time, then let it sit and filter, discard the liquid, then add cationic polyacrylamide III to the sludge, keep stirring for 30-50 minutes, and then add marsh red fake For monocellular bacteria, continue to feed hot ...

Embodiment 2

[0021] (1) Based on 100 parts of sludge, prepare materials according to the following components by mass:

[0022] Cationic polyacrylamide Ⅰ 6 parts, cationic polyacrylamide Ⅱ 1.2 parts, cationic polyacrylamide Ⅲ 0.5 parts, sodium acetate 0.5 parts, Candida utilis 0.3 parts, Rhodopseudomonas palustris 1.3 parts, particle size is 100 mesh 10 parts of sepiolite powder, 16 parts of activated carbon with a particle size of 300 mesh;

[0023] (2) Add the cationic polyacrylamide I of step (1) to 100 parts of sludge, keep stirring for 30 minutes, then add sodium acetate and cationic polyacrylamide II in sequence, keep stirring for 30 minutes, then add Candida utilis , continue to feed hot air at 28°C and supply oxygen for 30 hours, stir occasionally during the period, then let it stand and filter, discard the liquid, then add cationic polyacrylamide III to the sludge, continue stirring for 30 minutes, and then add swamp rhodopseudomonas Bacteria, continue to feed hot air at 28°C and...

Embodiment 3

[0025] (1) Based on 100 parts of sludge, prepare materials according to the following components by mass:

[0026] 8 parts of cationic polyacrylamide Ⅰ, 2 parts of cationic polyacrylamide Ⅱ, 0.8 parts of cationic polyacrylamide Ⅲ, 0.8 parts of sodium acetate, 0.45 parts of Candida utilis, 1.8 parts of Rhodopseudomonas palustris, the particle size is 200 mesh 15 parts of sepiolite powder, 18 parts of activated carbon with a particle size of 350 mesh;

[0027] (2) Add the cationic polyacrylamide I of step (1) to 100 parts of sludge, keep stirring for 50 minutes, then add sodium acetate and cationic polyacrylamide II in turn, keep stirring for 50 minutes, then add Candida utilis , continue to feed hot air at 35°C and supply oxygen for 12 hours, stir from time to time, then let it sit and filter, discard the liquid, then add cationic polyacrylamide III to the sludge, keep stirring for 50 minutes, and then add swamp rhodopseudomonas Bacteria, continue to feed hot air at 35°C and s...

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Abstract

The invention discloses a method for reducing the moisture content of sludge. Adding cationic polyacrylamide I to the sludge successively, then adding sodium acetate and cationic polyacrylamide II, adding Candida utilis, and then adding cationic polyacrylamide to the sludge Polyacrylamide III, Rhodopseudomonas palustris, and finally add sepiolite powder under stirring conditions, spread activated carbon on the surface of the sludge, let it stand for several hours, filter out the liquid, and complete the sludge treatment. The present invention specifically limits the timing of adding each component, and strictly limits the treatment time of each stage, the moisture content can be reduced to below 25%, and the lower calorific value is increased, which is convenient for the amount of sludge incinerated per unit time in the later incineration treatment It has been improved, and the whole treatment process has no pollution to the environment and no odor release. The treatment method of the invention has the advantages of simple raw materials, easy operation control, low cost, high treatment efficiency and the like.

Description

technical field [0001] The invention relates to a method for reducing the moisture content of sludge, which belongs to the technical field of sludge treatment. Background technique [0002] At present, with the continuous advancement of urbanization and people's increasing concern for environmental protection, the sludge generated in the process of urban domestic sewage treatment and its disposal have become an increasingly serious problem. In recent years, although my country has carried out a lot of work in the treatment and disposal of sludge, due to economic and technological reasons, my country's sludge treatment capacity is still very weak, mainly in: 1. The sludge treatment rate is extremely low; 2. Heavy water is light The development of mud and sludge treatment lags behind; 3. The technical route is mechanical; 4. It is difficult to supervise; 5. The investment is small and the policy is not perfect. [0003] Due to the management and technical defects related to se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/147C02F11/02
CPCC02F11/02C02F11/14
Inventor 贝德光梁虹林思远李栋安
Owner GUANGXI NANNING WATERWORKS CO LTD
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