Porous slow-release carbon source filler, preparation method and application thereof

A slow-release carbon source and raw material technology, applied in chemical instruments and methods, water treatment of special compounds, water/sludge/sewage treatment, etc., can solve problems such as in-depth research, environmental risks not mentioned, and effluent COD exceeding the standard , to achieve the effect of strengthening microbial denitrification, solving the low efficiency of denitrification, and having the effect of adsorption capacity

Pending Publication Date: 2021-03-26
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is necessary for the particles to have a large release amount and release rate, but when it is used in water with low pollution concentration, it may cause secondary pollution such as excessive COD in the effluent; and whether the material can continue to play a role in denitrification and for the The role of microorganisms in promoting attachment growth has not been studied in depth, and whether the substances released by ecological matrix particles into water bodies have environmental risks has not been mentioned.

Method used

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  • Porous slow-release carbon source filler, preparation method and application thereof
  • Porous slow-release carbon source filler, preparation method and application thereof
  • Porous slow-release carbon source filler, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] According to wetland plants: calamus straw powder 5%; adsorbing mineral materials: zeolite powder 39%, calcium-based bentonite 15%, kaolin 6%; viscous material: ordinary Portland cement 34.95%; pore-forming agent: aluminum powder 0.05% Raw material ratio to prepare porous slow-release carbon source filler. The steps are:

[0034] (1) Take calamus stalks withered or harvested in artificial wetlands, wash and dry, pulverize with a pulverizer, pass through 80-100 mesh sieves to obtain wetland plant carbon source powder for future use. Zeolite powder, calcium-based bentonite, kaolin and ordinary Portland cement are all pulverized to 100-120 mesh for later use;

[0035] (2) Fully stir and mix the powder in step (1) in proportion, fully stir and mix evenly, add to the disc granulator several times in batches, set the granulator speed to 25r / min, and slowly Slowly add water to make the raw material roll into a spherical shape, with a particle size of about 8-9mm;

[0036] (...

Embodiment 2

[0038] According to wetland plants: calamus straw powder 2%, reed straw powder 3%; adsorption mineral materials: zeolite powder 25%, calcium-based bentonite 25%, kaolin 14.96%; viscous material: ordinary Portland cement 30%; pore-forming agent The invention relates to the preparation of porous slow-release carbon source filler with a raw material ratio of 0.04% of aluminum powder. The steps are:

[0039](1) Take calamus and reed straw withered or harvested in the artificial wetland, wash and dry, pulverize with a pulverizer, and pass through a sieve of 80-100 mesh to obtain wetland plant carbon source powder for future use. Zeolite powder, calcium-based bentonite, kaolin and ordinary Portland cement are all pulverized to 100-120 mesh for later use;

[0040] (2) Fully stir and mix the powder in step (1) according to the proportion, fully stir and mix evenly, add it to the disc granulator several times in batches, set the speed of the granulator to 20r / min, and slowly Slowly a...

Embodiment 3

[0043] According to wetland plants: calamus straw powder 3%; adsorption mineral materials: zeolite powder 40%, calcium-based bentonite 12.97%, diatomite 10%; viscous materials: ordinary Portland cement 17%, kaolin 17%; pore-forming agent The invention relates to the preparation of a porous slow-release carbon source filler with a raw material ratio of 0.03% of aluminum powder. The steps are:

[0044] (1) Take calamus stalks withered or harvested in artificial wetlands, wash and dry, pulverize with a pulverizer, pass through 80-100 mesh sieves to obtain wetland plant carbon source powder for future use. Zeolite powder, calcium-based bentonite, diatomite, ordinary Portland cement, and kaolin are all crushed to 100-120 mesh for later use;

[0045] (2) Fully stir and mix the powder in step (1) according to the proportion, add it to the disc granulator several times in batches, set the granulator speed to 20r / min, and slowly add water with the rotation to make the raw materials R...

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Abstract

The invention discloses a porous slow-release carbon source filler, a preparation method and application thereof. The raw materials comprise, by weight, 3%-5% of wetland plants, 60%-65% of an adsorption mineral material, 30%-35% of a viscous material, and 0.03%-0.05% of a pore forming agent. Wetland plants withered or harvested in autumn and winter of a constructed wetland are used as a carbon source, the adsorption mineral material is an adsorption material, the viscous material is a supporting material, the pore-forming agent is used as an auxiliary material to create a porous shape, after uniform mixing of the substances, spherical filler is prepared, maintenance is conducted for 7-14 days under the conditions of a temperature of 15-25DEG C and humidity of 40-50%, and then airing is conducted. The porous slow-release carbon source filler is high in strength, stable in carbon release, long in carbon release period, is easy for microorganisms to adhere, can well solve the problem thatavailable carbon sources are insufficient, is capable of stably improving the denitrification and nitrogen removal effects, and is small in environmental risk, green and economical.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a porous slow-release carbon source filler and its preparation method and application. Background technique [0002] Carbon source is an important factor in the biological denitrification process, and denitrifying bacteria use organic carbon as an electron donor to gradually react nitrate nitrogen into nitrogen gas for removal. However, when the carbon source content in the water body is insufficient, the biological denitrification process is usually inhibited, not only the denitrification efficiency is low, but also leads to the accumulation of nitrite nitrogen, which poses a greater threat to the safety of the water environment. Therefore, it is necessary to make up for this deficiency by adding an external carbon source. Traditional external carbon sources can be divided into liquid carbon sources and solid carbon sources. Although low-molecular liquid carbon sources such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F3/28C02F3/32
CPCC02F3/34C02F3/28C02F3/32C02F2305/06
Inventor 许晓毅吴玮陈佳伟黄天寅时和敏丁飞郭洁王烽圣姜永波温妍葛丹丹
Owner SUZHOU UNIV OF SCI & TECH
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