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Sludge conditioner and using method thereof

A kind of sludge conditioning and sludge technology, applied in the direction of dehydration/drying/concentrated sludge treatment, etc., can solve the problem of little improvement in the dewatering performance of papermaking biochemical sludge, and achieve the effect of improving dryness and increasing filtration speed

Active Publication Date: 2012-05-30
SHANDONG TAIYANGZHIYE
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The use of traditional inorganic or organic sludge conditioners has little improvement in the dewatering performance of papermaking biochemical sludge

Method used

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  • Sludge conditioner and using method thereof
  • Sludge conditioner and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh a sample of the papermaking biochemical sludge to be conditioned in a 2000ml beaker. The papermaking biochemical sludge is taken from the sludge thickening tank (such as figure 1 (Shown), add a certain amount of sludge conditioner, stir continuously at 30-40℃ for 120-240 minutes, the stirring speed is 50-100 rpm, after precipitation, use laboratory self-made filter press equipment (see Figure 2 ) Extrusion, the pressure is controlled at 5.6Kgf / cm 2 , The filter press time is 4 minutes, and the water-containing sludge used for each test is 1000g. The experimental results show that the dryness of the sludge without the conditioning agent is 20-30% after pressure filtration, and the dryness of the sludge after the conditioning agent is 45-50%.

Embodiment 2

[0018] After the papermaking sludge is digested aerobic or anaerobic, the sludge conditioner of the present invention is added in a ratio of 1:100 before entering the sludge thickening tank, and the sludge is continuously stirred for 120-240 minutes at 30-40°C. The speed is 50-100 revolutions / min. After sedimentation, it enters the sludge thickening tank, and then presses and filters through the sludge filter press. The pressure is controlled at 5.6Kgf / cm2, and the filter press time is 4 minutes. After the sludge is press filtered, the sludge is filtered The biscuit degree is 45-50%.

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Abstract

The invention relates to the technical field of wastewater sludge treatment, in particular to a sludge conditioner added with biological enzymes and a method for treating biochemical sludge by using the sludge conditioner. The sludge conditioner comprises the following main components in percentage by weight: 0.95 to 0.99 percent of acid, 0.01 to 0.05 percent of mixed cellulase and hemicellulase,and the balance of water. The method comprises the following steps of: adding the sludge conditioner into water-containing sludge, uniformly stirring and performing mechanical dehydration. The dryness of the sludge can be improved from 20-30 percent to 40-50 percent under the same pressing condition. The sludge conditioner and the method solve the problem of deep dehydration of papermaking biochemical sludge; and the dehydrated sludge can be used as the raw material of soil utilization or a biomass incinerator.

Description

technical field [0001] The invention relates to the technical field of wastewater sludge treatment, in particular to a sludge conditioner added with biological enzymes and a method for treating biochemical sludge with the same. Background technique [0002] Papermaking sludge is the terminal product discharged after wastewater treatment in paper mills, including primary sludge, biochemical sludge and deinking sludge. Advanced pulp and paper enterprises produce about 10-20m of wastewater per ton of pulp and paper 3 In 2009, the annual output of papermaking sludge was 3.11-6.22 million tons. It can be seen that the amount of sludge produced by pulp and papermaking enterprises is very large. [0003] So far, the disposal methods of papermaking sludge mainly include sea discharge, landfill, agricultural use and incineration. The premise of sludge composting, incineration or other resource utilization is to dehydrate the sludge to a certain degree of dryness. At present, there ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/14
Inventor 吴朝军管全红张淑侠杨江红
Owner SHANDONG TAIYANGZHIYE
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