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Preparation method of slow-release carbon source hollow rod

A technology of carbon source hollowing and hollowing rods, which is applied in chemical instruments and methods, special compound water treatment, water/sludge/sewage treatment, etc., and can solve problems such as different denitrification speeds

Inactive Publication Date: 2020-07-28
GUANGDONG LIANGKE ENVIRONMENTAL PROTECTION ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for different sludges and different hydrolysis reaction standards, the composition of VFA in the resulting sludge is very different, and because the composition is different, it can also cause differences in denitrification speed. Therefore, how to put The general scientific research and application of VFA, the substance of sludge hydrolysis reaction, is still a relatively big difficulty

Method used

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  • Preparation method of slow-release carbon source hollow rod
  • Preparation method of slow-release carbon source hollow rod
  • Preparation method of slow-release carbon source hollow rod

Examples

Experimental program
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Effect test

Embodiment 1

[0029] S1: Take the carbonaceous material that is 10-20 parts by mass, the tail iron ore that is 60-70 parts by mass, the expanded perlite that is 1-10 parts by mass and 5-15 parts by mass Parts of gypsum are ground to a particle size of less than 10 cm and mixed evenly;

[0030] S2: Heating the mixture in step S1 to 110-130° C. in a vacuum state, drying for 1.5-3 hours; then rapidly raising the temperature to 850-1000° C., and roasting for 3-5 hours;

[0031] S3: cooling the mixture in step S2 to 85-95°C and adding 1-5 parts by mass of K 2 O and 0.0009-0.01 part of Ce are stirred evenly, and are finely ground by the inner side of the ball mill. At this temperature, the purity of the mixture in step S1 can be guaranteed to be higher after the reaction, and the oxidation of the iron element can also be avoided when the temperature is too high. Compared with cooling to room temperature Reduced cooling water consumption.

[0032] S4: Add binder to the mixture after step S3 grin...

Embodiment 2

[0050] In step S2, the mixture in step S1 is heated to 115-130°C under vacuum, dried for 1.5-2.5 hours, then rapidly heated to 900-1000°C, roasted for 3.5-4.5 hours, and taken out of the high-temperature heating equipment by a vacuum pump To avoid the rapid combustion reaction of oxygen in the subsequent air with carbon, resulting in a large loss of carbon and ablation.

Embodiment 3

[0052] In step S2, the mixture in step S1 is heated to 115-120° C. under vacuum, dried for 1.5-2 hours, then rapidly heated to 900-950° C., and calcined for 3.5-4 hours.

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Abstract

The invention belongs to the technical field of sewage treatment. The invention particularly relates to a preparation method of a slow-release carbon source hollow rod. The slow-release carbon sourcehollow rod has average outer diameter of 0.55 mm and the density of 4.6 g / cm3, which satisfies industrial application requirement and achieves great industrial application prospects; a carbon substance and an iron substance in the iron tailings can form iron-carbon microelectrolysis and have high chemical activity, so that the structure and the characteristics of many organic matters in the wastewater can be changed, so that chain scission and ring opening take place on the organic matters; in addition, the expanded perlite is used as aggregate and plays a role in skeleton supporting, the gypsum is used for manufacturing a microporous structure, increasing the specific surface area and providing a reaction field for iron and carbon substances, and the method has good economic benefits, issafe and environment-friendly, turns waste into wealth and is suitable for industrial production.

Description

【Technical field】 [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a preparation method of a slow-release carbon source hollow rod. 【Background technique】 [0002] Denitrification reaction is a biochemical process completed by a group of heterotrophic microorganisms. Under anoxic conditions (absence of molecular dissolved oxygen), nitrite and nitrate are reduced to nitrogen, nitric oxide or nitrous oxide. The microorganisms involved in the denitrification process are denitrifiers. Denitrifying bacteria are facultative bacteria and are almost ubiquitous in the natural environment. Many common microorganisms in wastewater treatment systems are denitrifying bacteria. In the absence of dissolved oxygen, denitrifiers use N(V) and N(III) in nitrate and nitrite as electron acceptors in energy metabolism, O 2 - H as a hydrogen acceptor 2 O and OH - Alkalinity, organic matter provides energy as a carbon source and electron do...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F3/34C02F1/461C02F101/30
CPCC02F3/28C02F3/348C02F3/347C02F1/46176C02F2305/06C02F2001/46133C02F2101/30
Inventor 蔡智君李文俊胡躬行杨远盛张耀勇雷凌峰佘常光陈自勇杨晓
Owner GUANGDONG LIANGKE ENVIRONMENTAL PROTECTION ENG
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