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Method and device for dewatering sludge with fly ash instead of lime

A technology for sludge dehydration and fly ash, applied in fertilization equipment, dehydration/drying/thickened sludge treatment, fertilizer mixture, etc., can solve the problems of high dehydration investment, secondary pollution, low dehydration efficiency, etc., and achieve simple process , low energy consumption, easy to achieve effect

Inactive Publication Date: 2018-01-09
LIANG SHAN LING HUA BIOTECH CO LTD
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  • Claims
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AI Technical Summary

Problems solved by technology

The current treatment method for sewage is activated sludge treatment, but this method will lead to a large amount of sludge, and sludge dehydration has always been another major problem in water treatment, among which high-pressure plate and frame filter press is currently used One of the most popular processes, but there are problems of low dehydration efficiency, adding other auxiliary materials, and secondary pollution
[0003] In order to improve the efficiency of sludge dehydration, some industries use drying methods for dehydration, but some odorous gases are produced during the low-temperature, medium-temperature, and high-temperature dehydration processes during the drying process, making it another problem in air pollution, resulting in dehydration investment. The problem of high and high cost

Method used

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  • Method and device for dewatering sludge with fly ash instead of lime

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 1 As shown, a method of fly ash instead of lime sludge dehydration is a technology of plate and frame filter press with fly ash produced in power plants instead of lime. The steps are as follows:

[0024] ① Add flocculant to the sludge generated in sewage treatment for standby, the amount of flocculant added is 0.5% of the sludge amount;

[0025] ② Dissolve the fly ash produced by the power plant in the sludge concentrate, and the amount of added fly ash is 10% of the sludge concentrate;

[0026] ③ After homogenizing the fly ash and sludge concentrate, enter the high-pressure plate frame for dehydration;

[0027] ④The extracted water is collected and carried to sewage treatment for further treatment;

[0028] ⑤ The dehydrated sludge is collected and used as fertilizer.

[0029] The moisture content of the treated sludge cake was 35.8%.

Embodiment 2

[0031] Such as figure 1 As shown, a method of fly ash instead of lime sludge dehydration is a technology of plate and frame filter press with fly ash produced in power plants instead of lime. The steps are as follows:

[0032] ① Add flocculant to the sludge produced in sewage treatment for standby, the amount of flocculant added is 1.8% of the sludge amount;

[0033] ② Dissolve the fly ash produced by the power plant in the sludge concentrate, and the amount of added fly ash is 15% of the sludge concentrate;

[0034] ③ After homogenizing the fly ash and sludge concentrate, enter the high-pressure plate frame for dehydration;

[0035] ④The extracted water is collected and carried to sewage treatment for further treatment;

[0036] ⑤ The dehydrated sludge is collected and used as fertilizer.

[0037] The moisture content of the treated sludge cake was 36.1%.

Embodiment 3

[0039] Such as figure 1 As shown, a method of fly ash instead of lime sludge dehydration is a technology of plate and frame filter press with fly ash produced in power plants instead of lime. The steps are as follows:

[0040] ① Add flocculant to the sludge generated in sewage treatment for standby, and the amount of flocculant added is 1.0% of the amount of sludge;

[0041] ② Dissolve the fly ash produced by the power plant in the sludge concentrate, and the amount of added fly ash is 13% of the sludge concentrate;

[0042] ③ After homogenizing the fly ash and sludge concentrate, enter the high-pressure plate frame for dehydration;

[0043] ④The extracted water is collected and carried to sewage treatment for further treatment;

[0044] ⑤ The dehydrated sludge is collected and used as fertilizer.

[0045] The moisture content of the treated sludge cake was 34.7%.

[0046] A dehydration device for fly ash instead of lime sludge, including a sludge thickening tank, a collec...

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Abstract

The invention discloses a method and device for dewatering sludge with fly ash instead of lime and relates to a technology of carrying out plate-frame pressure filtration with fly ash produced by a power plant instead of lime, a production process and formula are appropriately adjusted, and then fly ash is directly used for dewatering sludge. Compared with the prior art, the method and device which are disclosed by the invention have the characteristics of saving energy, saving raw materials and being environment-friendly, are widely applied to sewage treatment and have good popularization andapplication values.

Description

technical field [0001] The invention belongs to the field of environmentally friendly sludge dewatering, and in particular relates to a method and device for dehydrating fly ash instead of lime sludge. Background technique [0002] Glutamic acid fermentation wastewater is a kind of high-concentration organic wastewater produced in the process of glutamic acid production competition. It has complex components and is difficult to handle. The best strategy for sustainable development and realization of circular economy. The current treatment method for sewage is activated sludge treatment, but this method will lead to a large amount of sludge, and sludge dehydration has always been another major problem in water treatment, among which high-pressure plate and frame filter press is currently used One of the most common processes, but there are problems of low dehydration efficiency, adding other auxiliary materials, and causing secondary pollution. [0003] In order to improve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14C02F11/12C05G1/00
Inventor 杨玉岭满德恩岳希金杜英慧郭脉海李高卫
Owner LIANG SHAN LING HUA BIOTECH CO LTD
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