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Phosphorus recovery device for excess sludge

A technology of excess sludge and recovery device, applied in sludge treatment, biological sludge treatment, water/sludge/sewage treatment, etc., can solve problems such as high energy consumption, improve solution pH, save investment, and reduce alkali. The effect of liquid dosage

Inactive Publication Date: 2013-07-10
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the first problem encountered in the recycling of phosphorus in excess sludge is to release phosphorus first. In the prior art, ultrasonic and ozone oxidation methods are often used to release phosphorus in excess sludge. Ultrasonic and ozone oxidation Although the phosphorus release effect of the method is good, the large energy consumption has become one of its major disadvantages.

Method used

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  • Phosphorus recovery device for excess sludge
  • Phosphorus recovery device for excess sludge
  • Phosphorus recovery device for excess sludge

Examples

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Embodiment 1

[0038] Construction of the device: the device includes an anaerobic reaction device and a struvite nitrogen and phosphorus recovery device, and the anaerobic reaction device is connected to the struvite nitrogen and phosphorus recovery device through the sludge supernatant transfer pipe 10;

[0039] Described anaerobic reaction device comprises the sludge anaerobic reactor 4 that is provided with sludge inlet pipe 1 and sludge emptying pipe 15, and sludge anaerobic reactor 4 is provided with mud inlet control system 7, sludge standing reaction device 8, stirring device 14, pH meter 5 and ORP meter 6; the sludge inlet pipe 1 is provided with the first sludge pump 2 and the first sludge pump 2 between the first sludge pump 2 and the sludge anaerobic reactor 4 A flow meter 3, the mud inlet control system 7 includes a pH alarm system and an ORP alarm system. In order to enable the sludge to perform a good anaerobic reaction and fully release phosphorus, the sludge anaerobic re...

Embodiment 2

[0045] Use the device that embodiment 1 builds, carry out the phosphorus recovery of surplus sludge, concrete method is as follows:

[0046] The remaining sludge is lifted from the return pump room through the first sludge pump 2 and through the sludge inlet pipe 1 to the sludge anaerobic reactor 4 for anaerobic reaction. 7 Control the start-stop time of the sewage sludge pump 2, and determine the anaerobic residence time of the sludge. The pH meter 5 and the ORP meter 6 are set at the middle and lower part of the sludge anaerobic reactor 4, and the measured values ​​are fed back to the pH and ORP alarm system in the mud inlet control system 7 to ensure the sludge anaerobic effect. At the same time, the agitator 14 is provided in the sludge anaerobic reactor 4 to ensure that the remaining sludge is evenly mixed in the sludge anaerobic reactor 4 and to improve the effect of the sludge anaerobic reaction. After the remaining sludge undergoes anaerobic reaction, it enters the s...

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Abstract

The invention belongs to the field of sludge and sewage treatment in environmental engineering, and particularly relates to a phosphorus recovery device for excess sludge. The device comprises a nitrogen-phosphorus recovering device and a sludge anaerobic reactor which is connected with the nitrogen-phosphorus recovering device, wherein the sludge anaerobic reactor is provided with a sludge standing reactor which is used for releasing phosphorus in the excess sludge by adopting the anaerobic reaction method; and a struvite nitrogen-phosphorus recovering device is used for receiving phosphorus elements in the excess sludge through a magnesium ammonium phosphate crystal (struvite). The recovery device is simple to operate, remarkable in phosphorus releasing effect, stable to run, and relatively low in cost.

Description

Technical field [0001] The invention is the field of environmental engineering sludge and sewage treatment, and it involves a phosphorus recovery device with remaining sludge. Background technique [0002] Phosphorus is an important unable to regenerate non -metal mineral resources, and has important economic value in my country's increasingly developed industries.At present, more than 90 % of phosphate fertilizer in the world comes from phosphate.Based on different authoritative agencies in the world, phosphorus resources around the world can only use 60 ~ 130 A.In recent years, the price of international phosphorus and ore has soared all the way, which has doubled from 10 A.According to statistics, my country ’s currently 2.7 billion T folding phosphorus reserves, which is only enough to maintain my country for about 70 years, including more than 90%of non -richer phosphorus ore.If only the phosphorus -rich phosphorus reserves are calculated, it can only maintain the use of my ...

Claims

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Application Information

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IPC IPC(8): C02F11/04C02F11/14C02F11/00
Inventor 孙连鹏欧伟松谭锦欣
Owner SUN YAT SEN UNIV
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