Preparation method of composite carrier particles, composite bioreactor, sewage treatment system and sewage treatment method

A sewage treatment system and bioreactor technology, applied in the environmental field, can solve the problems of sludge loss, large load capacity of the secondary settling tank, and fluctuations in the supply of nutrients for microbial growth, so as to increase the concentration of sludge and reduce the actual solids Load and the effect of reducing the footprint

Active Publication Date: 2022-08-09
湖南五方环境科技研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) Limited by the suspension growth characteristics, the microbial diversity is not perfect, which affects the effect of advanced treatment;
[0007] (2) Limited by the parameters of the sewage treatment process, the growth cycle of some key microorganisms is limited;
[0008] (3) Limited by the change of influent water quality, the supply of nutrients for microbial growth fluctuates, affecting biological activity and actual treatment effect
[0010] (1) After the combination of carrier particles and floc sludge, the separation is difficult and easy to be lost with the sludge;
[0011] (2) The micron particle size cannot be adjusted, and the floc sludge treated in the biochemical tank cannot be separated, resulting in a huge load of the secondary sedimentation tank, which cannot match the treatment efficiency of the biochemical tank;
[0012] (3) The subsequent sludge sedimentation treatment in the secondary sedimentation tank is more difficult

Method used

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  • Preparation method of composite carrier particles, composite bioreactor, sewage treatment system and sewage treatment method
  • Preparation method of composite carrier particles, composite bioreactor, sewage treatment system and sewage treatment method
  • Preparation method of composite carrier particles, composite bioreactor, sewage treatment system and sewage treatment method

Examples

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Effect test

Embodiment 1

[0080] Example 1: Please combine together Figure 2-5 , expanded perlite as basic carrier particles, pyrite as functional mineral powder.

[0081] Preparation of base carrier particles:

[0082] Please refer to figure 2, for the base carrier particles (expanded perlite-PE) to prepare the expanded perlite particles with a raw material specification of 2-4mm.

[0083] The preparation process is as follows: 2-4mm PE particles and water are added to the corundum ball milling jar in a ratio of 2:5, and 1kg zirconia balls are added to the ball milling jar. After completing the above steps, cover the ball mill jar and install it into the planetary ball mill, cover the machine cover and turn on the switch. The rotational speed was set to 260 rpm, and the grinding time was 2 min. After the setting was completed, the planetary ball mill was started for wet grinding. The PE slurry in the grinding tank was sieved through an 8-mesh standard sieve and stored in a beaker. Wet sieve the...

Embodiment 2

[0092] Example 2: Using diatomaceous earth as basic carrier particles and pyrite as functional mineral powder.

[0093] Preparation of basic carrier particles: 325-mesh and 100-mesh sieves were used to sieve the diatomite powder to obtain diatomite particles with a particle size distribution of 40-70 μm.

[0094] The PY powder was loaded onto the surface of the diatomite particles through a dry powder mixing process to form composite carrier particles, wherein the PY loading was 25%.

[0095] Microbial growth and experimental design of wastewater treatment in composite bioreactors:

[0096] The hydraulic retention time is 5h, the DO control in the aerobic zone is 0.8-1.2mg / L, the internal and external return ratio is 100%, the sewage is taken from the fine grille effluent of an urban sewage treatment plant, and its water quality characteristics are as follows: COD is 100mg / L-400mg / L, ammonia nitrogen is 15mg / L~40mg / L, total nitrogen is 15mg / L~45mg / L. The inoculated sludge w...

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Abstract

The invention discloses a preparation method of composite carrier particles with controllable biological carrier particle size, a composite bioreactor, a sewage treatment system and application of the method. Functional mineral powder or organic carbon source powder is loaded in a basic carrier particle structure with the particle size distribution of 30-100 [mu] m, D50 greater than 40 [mu] m and D90 less than 90 [mu] m through a dry powder mixing process to form the composite carrier particles to promote enrichment of nitrogen and phosphorus removal obligate bacteria in a system; then, micro sludge particles with the particle size of 50-500 microns are formed by inducing microorganisms to grow on the composite carrier particles, and the micro sludge particles and the activated sludge jointly form the composite bioreactor. The tiny sludge particles are uniform in size, interception of the tiny sludge particles at the front end of the secondary sedimentation tank can be realized in various low-energy-consumption modes, and the actual operation solid load of the secondary sedimentation tank is reduced while the microbial biomass of a biochemical tank is increased; in addition, through the recovery and separation effect of the hydrocyclone in the sludge discharging process, efficient recovery of tiny sludge particles is achieved.

Description

technical field [0001] The invention relates to the field of environmental technology, in particular to a composite carrier particle with a controllable biological carrier particle size and a preparation method thereof, a composite bioreactor with a controllable biological carrier particle size, and a method and system for treating sewage. Background technique [0002] With the increasingly prominent environmental capacity and water environment problems, the requirements for environmental protection continue to increase. Existing sewage treatment plants are faced with the requirement to upgrade the effluent quality from the first-class B standard to the first-class A standard or even higher standards. There are two types of wastewater biological treatment methods currently commonly used: [0003] (1) One is the activated sludge method, which is characterized in that the microorganisms that treat the sewage are in a suspended state in the bioreactor; [0004] (2) The second...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F9/14
CPCC02F3/30C02F9/00C02F2001/007C02F1/38Y02W10/10
Inventor 万丽张淞萱
Owner 湖南五方环境科技研究院有限公司
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