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System and method for reclaiming sludge heavy metals

A recovery system and technology for heavy metals, applied in sludge treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of high cost and low recovery rate, and achieve low cost, less energy and less energy. Effects of Environmental Pollution

Inactive Publication Date: 2019-02-01
GUIZHOU MINZU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in order to speed up the harmless utilization of sludge, research on the removal or control of heavy metals in sludge is required, but the cost is high and the recovery rate is low, so it is urgent to develop a new technology to fix or remove heavy metals in sludge. heavy metals

Method used

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  • System and method for reclaiming sludge heavy metals
  • System and method for reclaiming sludge heavy metals
  • System and method for reclaiming sludge heavy metals

Examples

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Effect test

Embodiment 1

[0037] Such as figure 1 As shown, the sludge heavy metal recovery system of the present invention includes an alkali washing chamber 1, a backwash chamber I2, a reclaimed water treatment system 3, a plate and frame filter press 4, an ion exchange system 5, and a drying chamber 6. The washing chamber 1 is equipped with a stirrer I7, and the alkaline washing chamber 1 is connected to the ion exchange system 5 through pipelines, and is used to transport the heavy metal-containing upper alkaline washing waste liquid after the alkaline washing sedimentation to the ion exchange system 5, the alkaline washing chamber 1 The waste residue after the reaction sedimentation is sent to the backwash chamber I2;

[0038] The backwash chamber I2 is provided with a stirrer II8. The backwash chamber I2 is connected to the reclaimed water treatment system 3 through a circulating pipeline system, and the backwash wastewater is transported to the inlet of the reclaimed water treatment system 3 to rece...

Embodiment 2

[0054] Example 2 Experiment

[0055] The sludge sample was taken from the Guiyang Xiaohe Sewage Treatment Plant. The sludge sample was recovered by the method of Example 1 of the present invention, and the heavy metal content in the sludge was detected by the atomic absorption method (determined after digestion). The results are shown in the table 1 shows:

[0056] Table 1 Comparison of heavy metal content in sludge before and after treatment

[0057]

[0058] It can be seen from Table 1 that using the method of the present invention to perform heavy metal recovery processing on sludge samples can realize heavy metal recovery and promote the harmlessness of sludge.

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Abstract

The invention discloses a system for reclaiming sludge heavy metals. The system comprises an alkali washing chamber, a backwashing chamber I, a reclaimed water treatment system, a plate-and-frame filter press, an ion exchange system and a drying chamber, wherein the alkali washing chamber is connected with the ion exchange system, upper alkali washing waste liquid containing heavy metals after alkali washing settlement is delivered into the ion exchange system, and waste residues after backwashing and settling in the alkali washing chamber are delivered into the backwashing chamber I; the backwashing chamber I is connected with the reclaimed water treatment system through a circulating pipeline system, and the waste residues after backwashing settlement in the backwashing chamber is delivered into the plate-and-frame filter press; the plate-and-frame filter press is connected with the reclaimed water treatment system through a pipeline, filtrate after filter-press flows into the reclaimed water treatment system, and filter cake is delivered into the drying chamber; and the reclaimed water treatment system is further connected with the ion exchange system, reclaimed water which is treated in the reclaimed water treatment system flows into the ion exchange system, and clean water is obtained after the reclaimed water flows through the reclaimed water treatment system. The invention further discloses a method for reclaiming sludge heavy metals. The system has a simple structure, low cost and high heavy metal reclamation rate.

Description

Technical field [0001] The invention relates to the technical field of heavy metal recovery, in particular to a sludge heavy metal recovery system and method. Background technique [0002] Activated sludge is a degradation medium for the main water pollution factors in the prevention and control of water pollution. Due to its continuous output, the disposal channels are tight. For example, most of the current sewage treatment plants can only remove the moisture in the sludge to about 60%, and the sludge may contain high heavy metal components. These factors limit the further resource utilization and reuse of the sludge. . [0003] If the heavy metals in the sludge can be better controlled, the sludge can be converted into corresponding resources. At present, in order to speed up the harmless utilization of sludge, it is necessary to remove or control the heavy metals in the sludge, but the cost is high and the recovery rate is low, so it is urgent to develop a new technology to f...

Claims

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Application Information

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IPC IPC(8): C02F11/122C02F9/08
CPCC02F9/00C02F11/00C02F11/122C02F1/004C02F1/32C02F1/42
Inventor 王志康李凯兰彬彬葛秋诗华雪
Owner GUIZHOU MINZU UNIV
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