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Novel multifunctional sludge treatment method with sterilization and dewatering functions

A technology of sludge treatment and a new method, which is applied in the directions of dehydration/drying/concentrated sludge treatment, sludge treatment, water/sludge/sewage treatment, etc., which can solve the problems of complex operation equipment of sterilization technology, long preparation period of conditioning agent, Problems such as cumbersome operation steps, to achieve the effects of automatic processing, high virus removal effect, and simple process conditions

Inactive Publication Date: 2019-12-20
安徽国祯环卫科技有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of the prior art, provide a simple and effective new sludge dewatering method that can simultaneously improve the sludge dewatering efficiency and can sterilize, and solve the problem that the subsequent mud cake is often neglected in the existing sludge dewatering technology. The problem of pathogen removal in the medium, or the technical problems of the existing sludge dehydration sterilization technology with complex operation equipment, long preparation cycle of conditioner, and cumbersome operation steps

Method used

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  • Novel multifunctional sludge treatment method with sterilization and dewatering functions
  • Novel multifunctional sludge treatment method with sterilization and dewatering functions
  • Novel multifunctional sludge treatment method with sterilization and dewatering functions

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Effect test

Embodiment 1

[0049] (1) Fenton agent (Fe 2+ of 110mg / g VS and H 2 o 2 of 88mg / g VS) and CaO (110mg / gVS) conditioned municipal sludge press-filtered, and the prepared dewatered cake was dried in an oven at 105°C and then crushed for later use.

[0050] (2) Take about 20g of crushed mud cake powder in a porcelain boat, push it into the heating area of ​​the tube furnace, pass argon gas into the tube furnace, and discharge the remaining air in the tube to create an oxygen-free pyrolysis atmosphere. After reaching the set temperature (200-900°C), pyrolyze at a constant temperature for 60 minutes; after the pyrolysis is completed, cool to room temperature in an argon atmosphere, take it out, grind it with a mortar, and pass through a 100-mesh sieve to obtain the original mud, and store the raw mud in a brown wide-mouth reagent bottle for later use.

[0051] (3) Take 250mL of raw mud and put it into the reaction device, adjust the initial pH to 2, then add the iron-based catalyst prepared in ...

Embodiment 2

[0054] (1) Take 250mL raw mud and put it into the reaction device, adjust the initial pH to 2, then add 31.5-252mg / g TS zero-valent iron, stir and mix evenly with a glass rod, and finally pass 30mg O 3 / g TS ozone, the dosage of ozone is controlled by the reaction time, and the sum of stirring time and ozone ventilation time is controlled to be 20min.

[0055] From image 3 It can be seen from the figure that under acidification conditions, when no zero-valent iron is added, the CST value of the ozone-conditioned sludge is 5.34s L / g TS. When the dosage of zero-valent iron is 31.5mg / g TS, The CST of the sludge decreased to 2.62s L / g TS. As the dosage of zero-valent iron continued to increase, the CST of the sludge continued to decrease. When the dosage of zero-valent iron increased to 63mg / g TS , the CST of the sludge decreased to 1.97s L / g TS, and continued to increase the dosage of zero-valent iron, the CST of the sludge basically tended to be stable; it can be seen that aft...

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Abstract

The invention discloses a novel multifunctional sludge treatment method with sterilization and dewatering functions. The novel multifunctional sludge treatment method sequentially comprises the following steps: firstly, acidizing sludge; secondly, adding 32-252 g / g of TS zero-valent iron at room temperature, and stirring and mixing the sludge; then, performing ozonation on the mixture; and finally, carrying out filter-press dewatering treatment. The novel multifunctional sludge treatment method treats the sludge with acid-zero-valent iron-ozone, so that bound water in sludge cells becomes freewater to be removed, and the sludge dewatering performance is improved; besides, microorganisms in the sludge can be killed, and following resource utilization of the sludge is facilitated; in addition, the method is simple in process condition, short in process and treatment time, stable in reaction, good in universality, beneficial to automatic treatment of a large amount of sludge, good in conditioning effect and high in sludge dewatering degree; and the method has high reduction treatment universality for excess sludge and has wide application prospects.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a new method for sterilizing and dehydrating multifunctional sludge treatment. Background technique [0002] The treatment and disposal of excess activated sludge poses a huge challenge to the operation of municipal sewage treatment plants, accounting for as much as 35-65% of the total operating costs. Dewatering excess activated sludge can reduce sludge transportation and disposal costs. At present, many studies have proposed many methods to improve the sludge dewatering performance. Chinese patent CN105254155 utilizes Bdellovibrio to treat excess activated sludge, and the treated sludge is subjected to plate-and-frame press filtration or centrifugal dehydration, which can improve the sludge dewatering performance by 30%. Chinese patent CN104973751 uses antibiotic slag ash as a skeleton structure for sludge dehydration, which can provide sludge with a porous grid skel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14C02F11/00C02F11/122C02F11/12
CPCC02F11/004C02F11/14C02F2303/04
Inventor 杨家宽关文义肖可可王宁梁莎汪小会喻江维虞文波吕阳祝雨薇陶爽奕胡敬平侯慧杰刘冰川
Owner 安徽国祯环卫科技有限公司
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