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Preparation method of sludge micro powder, sludge micro powder and device

A sludge and micro-powder technology, applied in water/sludge/sewage treatment, chemical instruments and methods, biological water/sewage treatment, etc., to achieve reasonable structure, avoid sludge activity loss, and high biological activity

Pending Publication Date: 2022-07-08
CHINA ELEVENTH CHEM CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, this method is not suitable for the production of sewage treatment additive-sludge micropowder

Method used

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  • Preparation method of sludge micro powder, sludge micro powder and device
  • Preparation method of sludge micro powder, sludge micro powder and device
  • Preparation method of sludge micro powder, sludge micro powder and device

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preparation example Construction

[0027] According to one aspect of the present invention, it relates to a method for preparing sludge micropowder, comprising the following steps:

[0028] The sludge and sand are mixed and then frozen to obtain a first mixture; the first mixture is vacuum freeze-dried to obtain a second mixture; and the second mixture is stirred and pulverized to obtain a third mixture.

[0029] The preparation method of the sludge micropowder has the advantages of simple method, low preparation cost, short required time, and can keep the sludge micropowder with high activity.

[0030] The sand used in the present invention is abundant in nature and can be obtained only by screening the original sand, the preparation is simple, the cost is low, it can be recycled, the specific heat capacity is low, and the heat conduction efficiency is high. The method of adding fine sand to the sludge can reduce the specific heat capacity of the mixture and reduce the freezing time of the mixture; increase th...

Embodiment 1

[0079] The preparation method of sludge micropowder provided by this embodiment comprises the following steps:

[0080] (1) Take 3.5kg of commercially available yellow sand and sieve through a vibrating sieve to obtain 1-2mm fine sand;

[0081] (2) get 1.5kg of excess sludge discharged from the concentration tank of a sewage treatment plant and 2kg of fine sand after screening in step (1), and add it to the mixer from the feeding port;

[0082] (3) Start the stirrer motor, stir for 1h, and turn off the motor;

[0083] (4) Set the baffle 20 to be type I, start the blower booster pump of the second gas storage chamber 28, and set the flow rate to 2.7m 3 / h, open the exhaust valve of the first gas storage chamber 27 at the same time, open the first valve 12, and close the first valve 12, the blower booster pump of the second gas storage chamber 28 and the first gas storage chamber 27 after 15 minutes. Vent;

[0084] (5) Turn on the blower booster pump of the first gas storage ...

Embodiment 2

[0089] The preparation method of sludge micropowder provided by this embodiment comprises the following steps:

[0090] (1) Take 3.5kg of commercially available yellow sand and sieve through a vibrating sieve to obtain 2-4mm fine sand;

[0091] (2) get 1.5kg of excess sludge discharged from the concentration tank of a certain sewage treatment plant and 2kg of fine sand after screening in step (1), and add it into the mixer from the feeding port;

[0092] (3) Start the stirrer motor, stir for 1 hour, and turn off the motor;

[0093] (4) Set the baffle 20 to be type I, start the blower booster pump of the second gas storage chamber 28, and set the flow rate to 2.7m 3 / h, open the exhaust valve of the first gas storage room 27 at the same time, open the first valve 12, and close the first valve 12, the blower booster pump of the second gas storage room 28 and the first gas storage room 27 after 12 minutes. Vent;

[0094] (5) Turn on the blower booster pump of the first gas sto...

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Abstract

The invention relates to the field of biological treatment of wastewater, in particular to a preparation method of sludge micro-powder, the sludge micro-powder and a device. The preparation method of the sludge micro powder comprises the following steps: uniformly mixing sludge and sand, and freezing to obtain a first mixture; performing vacuum freeze drying on the first mixture to obtain a second mixture; and stirring and crushing the second mixture to obtain a third mixture. The preparation method of the sludge micro-powder is simple, low in cost and short in preparation time, and the prepared sludge micro-powder has relatively high activity.

Description

technical field [0001] The invention relates to the field of biological wastewater treatment, in particular to a method for preparing sludge micropowder, sludge micropowder and a device. Background technique [0002] With the continuous improvement of the requirements for the prevention and control of surface water eutrophication, the discharge water quality of the sewage treatment plant is required to meet the GB18918-2002 Grade A standard. The removal of nutrient pollutants such as nitrogen, phosphorus and organic matter becomes the primary goal of wastewater treatment. Biological nitrogen and phosphorus removal technology is widely used due to its low operating cost and high treatment effect. In recent years, granular sludge has been widely used due to its good settling performance, high biomass, high removal capacity of pollutants, and small footprint and low operating costs with the sequencing batch activated sludge method. received extensive attention. According to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00
CPCC02F3/00Y02W10/10
Inventor 骆辉娄战士马培丽张永昌万莹
Owner CHINA ELEVENTH CHEM CONSTR
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