Ultrasonic/filler combined sludge decrement device and process

A sludge reduction and ultrasonic technology, applied in the direction of sludge treatment, sludge treatment, biological sludge treatment, etc., can solve the problem of insignificant reduction effect, shorten the reaction time, increase the reduction speed, increase the ratio The effect of surface area

Active Publication Date: 2017-05-24
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Biological in-situ reduction technology has the advantages of low operating cost and convenient operation and management, but the existing aerobic-sedimentation-anaerobic (OSA) process often has no obvious reduction effect

Method used

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  • Ultrasonic/filler combined sludge decrement device and process
  • Ultrasonic/filler combined sludge decrement device and process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) 30% of the sludge at the bottom of the sedimentation tank 4 of the mainstream biological treatment module is first pumped into the ultrasonic unit 5, and the hydraulic retention time of the ultrasonic unit is 20 minutes. The sound energy density range of the ultrasonic device is 0.5W / ml, and the operation mode is to run for 5s and stop for 5s to ensure the uniformity of the ultrasonic and the effect of cell lysis; the concentration of sludge entering the ultrasonic unit is 4.5g / L, and the initial sewage of the ultrasonic unit The amount of mud is 2L.

[0032] (2) Lead 200ml of the ultrasonically pretreated sludge into the anaerobic side flow tank (that is, the bioreduction unit) 6 equipped with SPR-1 suspended filler. The initial sludge volume of the anaerobic side flow tank 6 is 2L, and the filling rate is 15%. The rotational speed in the anaerobic side flow tank was controlled at 200 rpm. Suspended fillers are suspended and floating in the pool.

[0033] (3) Th...

Embodiment 2

[0036] An ultrasonic packing combined sludge reduction process, such as figure 1 shown, including the following steps:

[0037] (1) The sewage to be treated is sent to the anoxic tank 2 and the aeration tank 3 successively through the water inlet pump 1 for treatment, and the mud-water mixture in the aeration tank 3 enters the sedimentation tank 4 after solid-liquid separation, and the sludge deposited at the bottom 5% is pumped into the ultrasonic unit 5, and the rest is all returned to the anoxic pool 2. The ultrasonic treatment process is: the hydraulic retention time is 0.5min, the sound energy density during ultrasonic treatment is 0.1W / m, and the operation mode is: ultrasonic 5s, stop 5s ;

[0038] (2) After the sludge is pretreated by the ultrasonic unit 5, it is sent to the bioreduction unit 6 for treatment, and finally sent back to the anoxic pool 2 by the metering pump 7. The bioreduction unit 6 includes the pool of the bioreduction unit 6 and the suspended filler ...

Embodiment 3

[0042] Except that the precipitation at the bottom of the sedimentation tank 4 in this embodiment is all pumped into the ultrasonic unit 5, the hydraulic retention time of the ultrasonic unit 5 is 20min, the sound energy density during ultrasonic treatment is 2W / m, the suspended filler is a German sponge filler, and the filling rate is 60%, the rotating speed of the rotating unit is 500rpm, the hydraulic retention time of the bioreduction unit 6 is 15 days, and the rest are the same as in Example 2.

[0043] After testing, the sludge weight reduction rate of this embodiment can reach 15.22%, and the organic matter weight reduction rate of the sludge can reach 18.97%.

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Abstract

The invention relates to an ultrasonic / filler combined sludge decrement device and process. The sludge decrement device comprises a main flow biological treatment component and a side flow sludge decrement component, wherein the main flow biological treatment component comprises an anoxic tank, an aeration tank and a sedimentation tank which are sequentially connected in the flowing direction of sludge, and the bottom of the sedimentation tank is connected back to the anoxic tank through a pipeline; and the side flow sludge decrement component comprises an ultrasonic unit and a biological decrement unit which are sequentially connected in the flowing direction of sludge, the inlet of the ultrasonic unit is connected to the pipeline at the bottom of the sedimentation tank, and the outlet of the biological decrement unit is connected back to the anoxic tank. Compared with the prior art, the ultrasonic pretreatment provided by the invention can change the morphology and composition of sludge extracellular polymers and reduce the particle size of sludge flocculating constituents, thereby contributing to accelerating the sludge hydrolysis and lysis process; and suspended fillers are thrown into the side flow sludge decrement component, so that habitats are provided for decrement functional microbes, and the hydraulic retention time is prolonged, thereby improving the sludge decrement efficiency.

Description

technical field [0001] The invention relates to the field of sludge volume reduction and discharge, in particular to an ultrasonic filler combined sludge volume reduction device and process. Background technique [0002] With the continuous development of social economy and the acceleration of urbanization, the discharge and treatment of urban sewage and industrial wastewater are increasing day by day, and the sludge production of corresponding sewage treatment plants is also rising sharply. At present, my country's annual dry sludge production is about 9.34 million tons, and it is also increasing at a rate of 10% year by year. [0003] The excess sludge has a high moisture content and a large volume. Usually, it is first concentrated, dehydrated and reduced in volume, and then incinerated, sanitary landfill, composted and land used for final disposal. However, excess sludge contains a large amount of harmful chemicals, parasites and heavy metals, etc. Improper treatment wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/04C02F11/00
CPCC02F11/00C02F11/04Y02W10/20
Inventor 周振程成杨纪元张大尉顾露源吴炜杨阳张伟陈屹融
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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