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FCR-based sewage treatment method

A sewage treatment method and sewage technology, applied in the direction of biological water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of manual maintenance cost, maintenance cost increase, treatment speed lag, and treatment deterioration To improve the scope of popularization and application, shorten the cycle, and prevent biological transfer

Inactive Publication Date: 2020-03-20
海天水务集团股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the sewage treatment process, a large amount of N and P in the sewage are relatively rich, and there are heavy metals in the sewage. The FCR reaction tank can decompose and adsorb the N, P and heavy metals in the water through the microorganisms attached to the plant surface, so as to realize Sewage treatment, but the processing speed of the FCR reaction tank depends on the digestion speed of microorganisms. The establishment of the FCR reaction tank is closely related to the biological chain, which leads to a certain lag in the processing speed
[0004] In the process of FCR sewage treatment, it is often necessary to regularly replenish the plants for sewage treatment. Once the plants in a certain treatment tank of the FCR reaction tank are abnormal, the treatment tank will continue to deteriorate, eventually causing the plants to die and be replaced, often due to slight The problem caused the deterioration of the treatment, and finally had to repair the treatment tank and replace a new batch of plants. The cost of labor maintenance and subsequent repair costs increased, resulting in unnecessary waste

Method used

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  • FCR-based sewage treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A kind of sewage treatment method based on FCR, mainly comprises the following steps:

[0038] Step S101: Pre-treat the sewage, and then sequentially import it into the first-level treatment pool to the sixth-level treatment pool for treatment. Algae are planted in the third-level treatment pool, and the algae turn yellow, then fish out, dry and crush ;

[0039] Step S102: The FCR reaction tank guides the treated sewage into a parallel advection secondary settling tank, and the advection secondary settling tank guides the treated sewage into a rotary filter; the sewage outlet of the advection secondary settling tank is connected to the sludge storage pool;

[0040] Step S103: Import the dried and pulverized algae in step S101 into the sludge storage tank for mixing, then add heavy metal flocculant and stir evenly, and then centrifuge to obtain supernatant and sludge, and the supernatant is returned to the FCR reaction tank for further For processing, the sludge sludge...

Embodiment 2

[0045] This embodiment is optimized on the basis of embodiment 1, such as figure 1 As shown, the pretreatment in the step S101 is to introduce the sewage into the coarse grid and the fine grid for filtration, and then treat the sewage through the swirl grit chamber; the filtrate in the step S103 is returned to the FCR reaction tank for processing .

[0046] Such as figure 1 As shown, the sewage is pretreated sequentially through the coarse grid, the fine grid, and the swirl grit chamber. The diameter of the coarse grid is 20mm and the diameter of the fine grid is 5mm. The coarse grid, fine grid The processed filter residues are placed in the corresponding grid residue storage devices for unified and regular treatment; the filter residues in the cyclone grit chamber are placed in the sand storage devices; the backwash water of the rotary disc filter flows back into the FCR reaction tank for further processing. Reprocessing; the supernatant of the centrifuge tank and the filtr...

Embodiment 3

[0049] This embodiment is optimized on the basis of Embodiment 1 or 2. The aeration device includes an aeration pipe and an aeration pump, and the air inlet of the aeration pump is respectively connected with air and CO through a three-way pipe. 2 tank, and the branch pipes of the three-way pipe are respectively provided with control valves, and the inside of the pool is provided with a pH meter; during the day, if the pH meter detects that the pH value of the third-stage treatment pool is >8.5, the aeration pump is connected CO 2 tank, otherwise the aeration pump communicates with the air; the pH value of the pool body is 6.5-8. The concentration of the algae liquid in the pool body is 1800-3200 cells / ml, and the stirring speed of the stirring device is 30-60 r / min. The weight ratio of mud cake to straw in step S104 is (65-75):30.

[0050] In the process of sewage treatment, once the internal carbon dioxide content of the pool is low, the photosynthesis efficiency of algae ...

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Abstract

The invention discloses an FCR-based sewage treatment method which comprises the following steps: establishing an algal-bacterial treatment system through algae and microorganisms to adsorb and decompose N, P and heavy metals in sewage, so that a good synergistic effect is achieved; meanwhile, mixing algae and sludge for sequential heavy metal flocculation, carrying out conversion into planting soil, realizing heavy metal degradation through a phytoremediation method, realizing biological optimization, solving the problem of heavy metal accumulation caused by diffusion of algae organisms. Thealgae growth period is short, the sewage treatment period is shortened, and good practicability is achieved; meanwhile, plant self-repairing in a FCR reaction tank is achieved through regular intercommunication of same-stage treatment tanks of the FCR reaction tank connected in parallel, the cost is reduced, and good practicability is achieved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a sewage treatment method based on FCR. Background technique [0002] Food Chain Reactor FCR (Food Chain Reactor) process is a patented technology of Hungarian Onika Company, which has a very efficient sewage purification capacity. This technology can realize a modular-based design, and the processing scale ranges from several hundred tons per day to hundreds of thousands of tons per day. The system has strong adaptability to environmental changes and strong shock load resistance, and has been widely used in foreign municipal sewage and industrial wastewater treatment. There are not many application cases of this technology in China. The sewage treatment project of Shangyou Industrial Park took the lead in adopting the FCR treatment process, and finally got a good treatment effect [0003] In the sewage treatment process, a large amount of N and P in the s...

Claims

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Application Information

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IPC IPC(8): C02F9/14B09C1/10C02F3/32C02F101/20
CPCC02F9/00C02F3/325B09C1/105C02F1/001C02F2001/007C02F1/38C02F7/00C02F2209/06C02F2209/24C02F3/109C02F3/302C02F2101/20
Inventor 许文来于晗瞿伦强陈怡钟亚萍
Owner 海天水务集团股份公司