Method for simultaneously realizing heavy metal harmless treatment and deep dehydration for dehydrated sludge
A deep dehydration and dewatering sludge technology, which is applied in chemical instruments and methods, water/sludge/sewage treatment, dehydration/drying/thickened sludge treatment, etc., can solve the problems of small sludge contact area and affecting treatment effect, etc. , to achieve the effect of enhancing the repair effect, low labor cost, and reducing resistance
Inactive Publication Date: 2015-09-23
SHENYANG JIANZHU UNIVERSITY
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But the anode of this device is rod-shaped
The contact area with the sludge is small, which affects the treatment effect
Method used
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Embodiment 1
[0025] Embodiment 1: as figure 1 As shown, the present invention is a method for simultaneously realizing heavy metal harmlessness and deep dehydration of dewatered sludge. In the process of sludge heavy metal harmlessness, deep dehydration of sludge is carried out at the same time, that is, in the same reactor, at the same time Harmless treatment and reduction of sludge; including the following steps:
[0026] (1). Put the sludge into the sludge chamber 3 of the reaction device, and turn on the power supply 8;
[0027] (2). Turn on the reaction device. According to the electroosmotic characteristics of the treated sludge, determine the electrode movement rate selected under different loading voltages. By rotating the rotating shaft 1, the anode 2 moves down at a constant speed, and the output voltage of the power supply is reduced to make a constant between the two electrodes. The voltage gradient is 6v / cm, and the water removed by electroosmosis is discharged through the fi...
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The invention discloses a method for simultaneously realizing heavy metal harmless treatment and deep dehydration for dehydrated sludge, and belongs to the technical field of sludge treatment and environmental protection. According to the method, sludge is subjected to deep dehydration when a sludge heavy metal harmless treatment process is performed. The method comprises the following steps: putting the sludge into a sludge cavity in a reaction device, and switching on the power; starting the reaction device, wherein the moving rates of electrodes selected under different loading voltages are confirmed according to the electro-osmosis property of the treated sludge, an anode is downwards moved at a uniform speed through the rotation of a threaded rod, the power output voltage is reduced, the constant voltage gradient between two electrodes are kept, and water removed by electro-osmosis is discharged through a bottom filter layer, and then flows into a water collection tank; after the reaction is finished, the water content of the sludge subjected to heavy metal harmless treatment and deep dehydration meets the requirement, and the sludge can be directly taken for land filling or resource utilization. The method has the advantages that the time required for a complete process is short, the operation is convenient, no chemical agent is needed for energy consumption, only electric energy is needed, energy conservation and environmental protection are realized, and secondary pollution to the environment is avoided.
Description
technical field [0001] The invention belongs to the technical field of sludge treatment and environmental protection, and in particular relates to a method for simultaneously realizing dehydration of heavy metals and deep dehydration of dewatered sludge. Background technique [0002] my country's sludge treatment and disposal technology is still in its infancy. The main disposal technologies are agricultural utilization and landfill, and even some sludge is directly piled up without any treatment, which will cause great harm to the environment. The sludge has a serious odor, and the heavy metals and toxic and harmful organic pollutants pollute nearby farmland and groundwater systems. my country's "Urban Sewage Treatment Plant Sludge Disposal Mud for Mixed Landfill" (GB / T 23485-2009) stipulates that when sludge and domestic waste are mixed for landfill, the basic indicators and limits are as follows: sludge moisture content <60 %, the pH value is 5-10. However, the moistu...
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Inventor 黄殿男李薇傅金祥王冬艾志生
Owner SHENYANG JIANZHU UNIVERSITY