Microbial activation method and system for ecological restoration of eutrophic water body

A microbial activation and eutrophication technology, applied in the field of environmental engineering, can solve the problems of difficult application of river course and landscape water body restoration, high investment and operation costs, secondary pollution of chloride ions, etc., to improve effective biomass and functionality, The effect of improving the material balance state and increasing the dissolved oxygen level

Active Publication Date: 2018-07-27
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is the same as the traditional air flotation method, but the chemical dosing device is added, a large amount of chloride ion secondary pollution is introduced, and the process is cumbersome
[0006] The traditional biological bypass water treatment process can effectively remove organic C, N, and P in wastewater, but its biological removal mechanism is completed in a closed microbial action unit, and phosphorus removal is mainly completed through sludge discharge. The generation of a large amount of sludge not only causes secondary pollution, but also has extremely high investment and operating costs. How to effectively treat and dispose of a large amount of excess activated sludge has become a bottleneck in the development of modern sewage treatment plants.
The traditional biological treatment process represented by the activated sludge method is difficult to apply to the restoration of river courses and landscape water bodies

Method used

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  • Microbial activation method and system for ecological restoration of eutrophic water body
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  • Microbial activation method and system for ecological restoration of eutrophic water body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The experiment selects a landscape water body in Yangpu District, Shanghai, with an area of ​​8000m 2 , is a semi-enclosed lake. Due to the surface runoff pollution and the continuous falling of leaves on the shore into the lake, the silt at the bottom of the lake is thick. In recent years, the degree of eutrophication of the water body has become serious, the transparency has decreased, and the water quality has deteriorated seriously.

[0035] The specific situation of the experimental site:

[0036] The volume ratio of the anoxic zone and the aerobic zone is 1:5, and the total volume of the reactor is 0.6m 3 In the anoxic zone, granular suspension-type specific microbial activation fillers are added (a one-time dosage of 3000mg / L at the initial stage of the process) to achieve microbial cultivation. In the aerobic zone, fixed fibrous fillers are used (the specific surface area of ​​the filler is 11.5m 2 / g), the hydraulic retention time is controlled at the initial...

Embodiment 2

[0044] The experiment selects a landscape water body in Hefei City, Anhui Province, with an area of ​​10,000m 2 , is a semi-enclosed lake. Due to surface runoff pollution and unintentional pollution sources discharged into the lake, the lake bottom has thick silt. In recent years, the degree of eutrophication of the water body has become serious, the transparency has decreased, and the water quality has deteriorated seriously.

[0045] The specific situation of the experimental site:

[0046] The volume ratio of the anoxic zone and the aerobic zone is 1:3, and the total volume of the reactor is 0.8m 3 , the anoxic area is filled with granular, suspended, and specific microbial activation fillers (the one-time dosage at the initial stage of the process is 4000mg / L, and the aerobic area uses fixed fibrous fillers (the specific surface area of ​​the filler is 15m 2 / g), the hydraulic retention time is controlled to 8h, and the internal self-circulation of the system is 24h at t...

Embodiment 3

[0053] The experiment selected a closed river in Dongying City, Shandong Province, with a water area of ​​5000m 2 . Due to surface runoff pollution and unintentional pollution sources discharged into the lake, the lake bottom has thick silt. In recent years, the degree of eutrophication of the water body has become serious, the water body has been turbid, and the water quality has deteriorated seriously.

[0054] The specific situation of the experimental site:

[0055] The volume ratio of the anoxic zone and the aerobic zone is 1:4, and the total volume of the reactor is 0.3m 3 , the anoxic area is filled with granular, suspended, and specific microbial activation fillers (the one-time dosage at the initial stage of the process is 1000mg / L, and the aerobic area uses fixed fibrous fillers (the specific surface area of ​​the filler is 10m 2 / g), the hydraulic retention time is controlled to 9h, and the internal self-circulation of the system is 24h at the initial stage of the...

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Abstract

The invention discloses an ecological purification method of a eutrophicated water body. The water body local microbes are activated, and the water body is used instead of the traditional limited bioreactor to release the microbial growth space, thereby displaying the decomposition capacity in the microbe reproduction process on the pollutants in the water body, enhancing the effective biomass and functionality of the microbes, recombining, completing and optimizing the water body microbial ecological system, further enhancing the action of the establishment of the microbial centralized hub, implementing the matter flow transfer of the pollutants among different trophic levels along the water body ecological system, promoting the restoration and self-purification regulating capacity of the water body, and implementing in-situ ecological restoration on the water body. The invention also discloses a system for implementing the eutrophicated water body ecological purification method, and a specific microbe activating filler used in the system and a preparation method thereof. The method has the advantages of less required equipment and low energy consumption, is convenient for management and operation, can provide technical supports for landscape water body treatment, and has favorable social, economical and environmental benefits.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering and relates to a microbial activation process system for ecological restoration of eutrophic water bodies. Background technique [0002] With the rapid development of economy and society, some surface water bodies have been polluted and damaged to varying degrees, such as serious eutrophication, reduced transparency, and foul odor. Eutrophication is an important manifestation of the current routine pollution of water bodies, that is, a large amount of nutrients such as nitrogen and phosphorus accumulate in water bodies. The balance of the system is unstable, which eventually leads to the destruction of the aquatic ecosystem and the further aggravation of environmental problems. With the increasing use of environmental resources by human beings, especially the large-scale development of industrial and agricultural production, a large amount of domestic sewage containing nitrogen ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34C02F3/30
CPCC02F3/302C02F3/308C02F3/34C02F2101/105C02F2101/16C02F2101/30C02F2103/007C02F2209/005C02F2301/04
Inventor 柴晓利戴晓虎武博然杨宁
Owner TONGJI UNIV
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