Technique for reducing excess sludge in sewage treatment plant

A technology for sewage treatment plants and excess sludge, which is applied in the oxidation treatment of sludge and wastewater treatment during processing, etc., can solve the problems of difficult removal of internal water, sludge collapse, and insignificant dehydration effect, so as to achieve low treatment costs and reduced costs. The harm of secondary pollution and the effect of reducing moisture content

Pending Publication Date: 2019-08-02
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are several limitations in these treatment methods: first, after the sludge is oxidized by a strong oxidant, the EPS breaks down and the water is released, which may easily cause the sludge to collapse during the sludge dehydration process, making it difficult for the internal water to escape; the second is to use the skeleton alone The internal moisture cannot be released, and the dehydration effect is not obvious

Method used

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  • Technique for reducing excess sludge in sewage treatment plant
  • Technique for reducing excess sludge in sewage treatment plant
  • Technique for reducing excess sludge in sewage treatment plant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Step 1: Test the main indicators of the sludge from the thickening tank of the urban sewage treatment plant and the primary sludge of the waste paper and papermaking sewage treatment plant.

[0045] Step 2: Take 200mL of municipal sludge and place it in a 500mL beaker, and adjust the pH value of the sludge to 7. Stir with a mechanical stirrer at 200r / min for 5min, mix papermaking sludge: municipal sludge according to the ratio range of 1:4, and obtain mixed sludge after stirring for 5min, K 2 S 2 o 8 The dosage is 30mg / g DS is added to the mixed sludge and stirred for 5min, FeSO 4 The dosage of DS is 60mg / g. Add it into the mixed sludge and continue stirring for 10min.

[0046] Step 3: Sludge specific resistance (SRF) Use a sludge specific resistance measuring device (KL-WBC-1 type, Wuhan Kelingao Teaching Equipment Co., Ltd.). Dry the filter paper together with the glass slide in an oven at 105°C to constant weight, and then put it in a desiccator to room temperatu...

Embodiment 2

[0050] Step 1: Test the main indicators of the sludge from the thickening tank of the urban sewage treatment plant and the primary sludge of the waste paper and papermaking sewage treatment plant.

[0051] Step 2: Take 200mL of municipal sludge and place it in a 500mL beaker, and adjust the pH value of the sludge to 7. Stir with a mechanical stirrer at 200r / min for 5min, mix papermaking sludge: municipal sludge according to the ratio range of 1:2, and obtain mixed sludge after stirring for 5min, K 2 S 2 o 8 The dosage is 30mg / g DS is added to the mixed sludge and stirred for 5min, FeSO 4 The dosage of DS is 60mg / g. Add it into the mixed sludge and continue stirring for 10min.

[0052] Step 3: Sludge specific resistance (SRF) Use a sludge specific resistance measuring device (KL-WBC-1 type, Wuhan Kelingao Teaching Equipment Co., Ltd.). Dry the filter paper together with the glass slide in an oven at 105°C to constant weight, and then put it in a desiccator to room temperatu...

Embodiment 3

[0056] Step 1: Test the main indicators of the sludge from the thickening tank of the urban sewage treatment plant and the primary sludge of the waste paper and papermaking sewage treatment plant.

[0057] Step 2: Take 200mL of municipal sludge and place it in a 500mL beaker, and adjust the pH value of the sludge to 7. Stir with a mechanical stirrer at 200r / min for 5min, mix papermaking sludge: municipal sludge according to the ratio range of 3:4, and obtain mixed sludge after stirring for 5min, K 2 S 2 o 8 The dosage is 30mg / g DS is added to the mixed sludge and stirred for 5min, FeSO 4 The dosage of DS is 60mg / g. Add it into the mixed sludge and continue stirring for 10min.

[0058] Step 3: Sludge specific resistance (SRF) Use a sludge specific resistance measuring device (KL-WBC-1 type, Wuhan Kelingao Teaching Equipment Co., Ltd.). Dry the filter paper together with the glass slide in an oven at 105°C to constant weight, and then put it in a desiccator to room temperatu...

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Abstract

The invention discloses a technique for reducing excess sludge in a sewage treatment plant. By testing main indicators of concentration tank sludge of a municipal sewage treatment plant and the primary sludge of a waste paper papermaking sewage treatment plant, municipal sludge and paper sludge are obtained respectively; the determination of the optimal dosage, the measurement of the moisture content of sludge cakes, and the measurement of the specific resistance of the sludge can not only break the EPS, but also release the internal combined water, at the same time, the paper sludge acts as askeleton support inside, so that the sludge cakes are enabled to maintain the porous property during the suction filtration process, a water channel is formed, the internal moisture is smoothly takenout, the resource utilization of the paper sludge can be realized, and the purpose of reducing the municipal sludge can be achieved.

Description

technical field [0001] The invention relates to the technical field of solid waste treatment, in particular to a process method for reducing excess sludge in a sewage treatment plant. Background technique [0002] With the acceleration of my country's urbanization process, the annual output of domestic sewage and industrial wastewater is increasing day by day. Due to the country's emphasis on environmental issues and the gradual enhancement of public environmental protection awareness, the number of sewage treatment plants in my country is also increasing. Sludge As the main product of sewage treatment plants, the annual output is also increasing. The water content of sludge from urban sewage treatment plants is still as high as 60%-80% after mechanical dehydration, which is far from meeting the requirements for sludge treatment and disposal in the "Sludge Disposal of Urban Sewage Plant Sludge Mixed with Landfill" (GB / T23485-2009) Provisions. Sludge usually contains pathoge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/06C02F103/28
CPCC02F11/06C02F2103/28
Inventor 王森程赛鸽肖雪莉张安龙来凡李天龙
Owner SHAANXI UNIV OF SCI & TECH
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