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Method for deeply dehydrating sludge through gravity concentration and photodecomposition

A technology of gravity concentration and deep dehydration, which is applied in the fields of dewatering/drying/concentrating sludge treatment, water/sludge/sewage treatment, sludge treatment, etc. and energy loss, less mud volume, and the effect of improving the working environment

Active Publication Date: 2016-11-16
北京同创碧源水务科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Sludge treatment and disposal methods With the actual needs of history and times, sludge deep dehydration technology represented by "sludge concentration-iron salt plus lime" has been produced, but the purpose is to reduce the moisture content of sludge at the expense of It is not advisable to add a large amount of sludge advanced treatment additives produced under the influence of low-end energy and the environment in exchange for a stable and harmless sludge technology route

Method used

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Examples

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Embodiment Construction

[0022] The specific implementation of the present invention will be described in further detail below in conjunction with the examples. The following examples are used to illustrate the present invention, but not to limit the scope of the present invention.

[0023] The method for deeply dewatering sludge using gravity concentration and photolysis of the present invention includes the following steps:

[0024] A. Add the polymer composite flocculant to the sludge from the sewage treatment plant with a water content of 98% or more at the ratio of 1.3‰ to 1.7‰ of the sludge solid content Tds, and then use gravity to thicken the sludge. The water content is 95%-97%; the added amount of the polymer composite flocculant is small, and the treatment effect is better.

[0025] B. Aerate the gravity-concentrated sludge obtained in step A. The aeration residence time is 110-130 minutes, so that the dissolved oxygen DOC content of the mud is above 7.5mg / L, and the flocculant network is cut thr...

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Abstract

The invention relates to a method for deeply dehydrating sludge through gravity concentration and photodecomposition. The method comprises the steps that a macromolecular composite flocculant is added into the sludge with the water content of 98% or above according to the proportion of 1.3%o-1.7%o of the sludge solid content Tds, and the sludge is concentrated through gravity till the water content ranges from 95% to 97%; the sludge subjected to gravity concentration is aerated; Fe2+ salt is added into the aerated sludge according to the proportion of 1.1%o-1.3%o of the sludge solid content Tds, and the sludge is irradiated with ultraviolet light with the wavelength being 253.7 nm; FeSO4.7H2O is added in a stirred mode according to the proportion of 6.5%-8.5% of the sludge solid content Tds. According to the method for deeply dehydrating the sludge through gravity concentration and photodecomposition, the equipment investment cost is low, the agent addition amount is reduced, energy consumption is reduced, environment-friendly clean energy is utilized, and the water content of a sludge cake is reduced.

Description

Technical field [0001] The invention relates to a method for deeply dewatering sludge by using gravity concentration and photolysis. Background technique [0002] With the development of social economy, the acceleration of urbanization, the improvement of people's living standards, the popularization of municipal sewage facilities, the increase of sewage treatment rate, the deepening of the treatment degree, the rapid growth of sludge treatment and disposal, how to deal with it reasonably Good sludge has become the primary problem that local governments and governments at all levels need to solve together. [0003] The sludge contains toxic and harmful substances such as organic matter, heavy metals, pathogenic bacteria and pathogenic bacteria. If it is not properly treated, it will cause a second pollution to the environment, causing disasters such as decomposition of organic matter, release and transfer of heavy metals, and migration of pathogenic bacteria. The state has formula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/12C02F11/14
CPCC02F11/00C02F11/122C02F11/14
Inventor 李加皇尹秋利
Owner 北京同创碧源水务科技发展有限公司
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