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Sludge treatment method and system

A sludge treatment and sludge technology, applied in sludge treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of high treatment cost, unsatisfactory heavy metal treatment effect, and complex treatment technology. , to simplify the operation process, reduce the cost of sludge treatment, and achieve good process controllability

Inactive Publication Date: 2015-09-02
QINGHAI NORMAL UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

However, the existing treatment technology is relatively complicated, the treatment cost is relatively high, and the treatment effect of heavy metals in sludge is not ideal

Method used

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  • Sludge treatment method and system
  • Sludge treatment method and system
  • Sludge treatment method and system

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] refer to figure 1 , figure 2 , the present embodiment provides a sludge treatment method, comprising the following steps:

[0051] First: Pretreatment of the sludge to be treated to remove solid impurities in the sludge to be treated, so as to get the impurity-removed sludge. Second: Put the impurities-removed sludge into the reactor, and control the pressure in the reactor to alternately change the high pressure and low pressure to free the heavy metals adsorbed by the microorganisms. Third: Add chemical reagents to the second treated sludge to precipitate heavy metals. Fourth: Then, solid-liquid separation is performed on the settled sludge, and treated sludge is obtained.

[0052] First, sludge is treated to remove impurities. Since there are usually various stones, branches, metal plates, etc. in the sludge, these impurities will affect the transportation of the sludge and affect the treatment of the sludge. Therefore, when the sludge is processed in the next ...

Embodiment 2

[0058] refer to image 3 , the present embodiment provides a sludge treatment method, comprising the following steps:

[0059] First: pretreat the sludge to be treated, reduce the solid content in the sludge to be treated, and get rid of impurities.

[0060] Second: firstly carry out pre-analysis on the impurity-removing sludge, and obtain the initial heavy metal content in the impurity-removing sludge through the pre-analysis, and then calculate the dosage of the chemical reagent according to the above-mentioned initial heavy metal content. Preferably, it is also possible to calculate the initial organic content in the de-trammed sludge.

[0061] Third: put the de-impurity sludge into the reactor, and control the pressure in the reactor to alternately change the high pressure and low pressure to free the heavy metals adsorbed by the microorganisms.

[0062] Fourth: Add chemical reagents to the sludge in the sludge to precipitate heavy metals.

[0063] Fifth: Then, solid-li...

Embodiment 3

[0071] refer to Figure 4 , Figure 5 , The present invention also provides a sludge treatment system, comprising: a sludge pre-treatment unit, a sludge reaction unit and a sludge post-treatment unit. The sludge pre-treatment unit, the sludge reaction unit and the sludge post-treatment unit are connected to form a treatment channel, and chemical reagents for treating heavy metals are arranged in the treatment channel.

[0072] The sludge pre-treatment unit includes a sludge storage tank for storing sludge and a feed pump, the sludge storage tank is provided with a sludge inlet and a sludge outlet, and the feed pump is provided with a feed inlet and supply outlets. The sludge reaction unit includes a reactor and a pressure regulator for alternately changing high pressure and low pressure in the reactor to free the biosorbed heavy metals, and the reactor is provided with a feed inlet, a discharge outlet, and a pressure regulator. Regulating interface, the feed inlet is connec...

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Abstract

The invention provides a sludge treatment method and system, and belongs to the technical field of environment protection. The sludge treatment method comprises the following steps: firstly, removing impurities in sludge; secondly, applying high pressure and low pressure to the sludge in an alternate change manner; thirdly, adding a chemical agent into sludge to enable heavy metal to be precipitated; finally, performing solid-liquid separation on sludge, and treating to obtain treated sludge. The sludge treatment method system comprises a sludge pre-treatment unit, a sludge reaction unit and a sludge post-treatment unit which are connected with one another to form a treatment channel in which the chemical agent is placed; the sludge reaction unit comprises a pressure regulator used for applying high pressure and low pressure to the sludge in an alternate change manner; through the adoption of the pressure regulator, biologically-adsorbed heavy metal can be separated out. Through the sludge treatment method and system provided by the invention, energy consumption in the sludge treatment process can be reduced, and the sludge treatment procedures can be simplified, so that the treatment cycle of the sludge can be shortened.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a sludge treatment method and system. Background technique [0002] Due to the vigorous advancement of urbanization in my country, the number of urban workers in China has continued to increase, and the discharge of domestic sewage has increased year by year; in addition, the discharge of sewage from various factories has also continued to increase. In order to deal with these sewage, numerous sewage treatment plants have been built to treat sewage. Due to the various solid substances contained in sewage, sewage treatment plants face the problem of dealing with a large amount of sludge when treating sewage. Various organic, inorganic and heavy metal substances contained in sludge will cause many environmental problems if they are not treated. As a result, the country has issued many preferential policies to encourage enterprises and research institutions to dev...

Claims

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Application Information

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IPC IPC(8): C02F11/00
Inventor 杨林
Owner QINGHAI NORMAL UNIV
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