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Biological/enzymatic wet land sewage processing method

A sewage treatment method and bioreactor technology, applied in the direction of biological water/sewage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc., can solve the problems of large changes in growth and treatment effects, high pollution load of ecological units, Weaken problems such as ecological treatment technology to achieve the effects of increasing effective bed capacity, improving seasonal adaptability, and extending hydraulic streamlines

Inactive Publication Date: 2008-10-08
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The combination of biological treatment units can realize the removal of organic matter and nitrogen and phosphorus through the input of energy consumption, and has a strong impact load resistance. However, due to the weakening of ecological treatment technology, the removal of pollution load is completely dependent on the input of biological treatment energy consumption. , in order to obtain higher effluent water quality, the input energy consumption is correspondingly higher, which leads to the emergence of the problem of "three highs and one excess"
[0004] The traditional biological treatment method needs energy consumption of about 0.27-0.36 yuan / m to directly treat the sewage to meet the standard 3 , the ecological unit-based combination method can achieve the removal of organic matter, nitrogen and phosphorus with low energy consumption, but because the biological unit only plays an auxiliary role, the ecological unit has a high pollution load, a large area, and is affected by seasonal plants. Large changes in growth treatment effect, limited adjustability, poor impact load resistance and other problems, especially when the sewage is not effectively pretreated, resulting in a large amount of suspended solids entering the wetland unit, which will greatly shorten the service life of the wetland

Method used

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  • Biological/enzymatic wet land sewage processing method

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Experimental program
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Effect test

Embodiment 1

[0031] Embodiment 1 A biological / enzymatic wetland sewage treatment method, comprising

[0032] (1) When the total phosphorus load in the sewage is less than or equal to 4mg / L, the intermittent aeration mode is adopted in the bioreactor, the aeration time is 2h, the stirring time is 1h, the hydraulic retention time is 8h, and the COD of the bioreactor effluent is 120mg / L, NH 4 -N is 20mg / L, TN is 30mg / L, TP is 1.8mg / L, water flows into the enzymatic wetland from the bioreactor, and the enzymatic wetland adopts three-stage progressive water distribution, so that the load distribution at the water inlet is even;

[0033] (2) Configure enzymatic wetland filler

[0034] Enzymatic wetland fillers include planting soil layer, water distribution layer, enzymatic layer, adsorption layer, calcium layer, aggregate layer, and protective soil layer. The planting soil layer is composed of soil, plant ash, and sawdust. , the particle diameters are 2mm, 1mm, 2mm respectively, and the volu...

Embodiment 2

[0036] Embodiment 2 A biological / enzymatic wetland sewage treatment method, comprising

[0037] (1) When the total phosphorus load in the sewage is less than or equal to 4mg / L, the intermittent aeration mode is adopted in the bioreactor, the aeration time is 4h, the stirring time is 2h, the hydraulic retention time is 12h, and the COD of the bioreactor effluent is 100mg / L, NH 4 -N is 15mg / L, TN is 20mg / L, TP is 1.2mg / L, then water flows from the bioreactor into the enzymatic wetland, and the enzymatic wetland adopts three-stage progressive water distribution, so that the load at the water inlet is evenly distributed;

[0038] (2) Configure enzymatic wetland filler

[0039] Enzymatic wetland fillers include planting soil layer, water distribution layer, enzymatic layer, adsorption layer, calcium layer, aggregate layer, and protective soil layer. The planting soil layer is composed of soil, plant ash, and sawdust. , the particle diameters are 5mm, 2mm, 1mm respectively, and t...

Embodiment 3

[0041] Embodiment 3 A biological / enzymatic wetland sewage treatment method, comprising

[0042] (1) When the total phosphorus load in the sewage is less than or equal to 4mg / L, the intermittent aeration mode is adopted in the bioreactor, the aeration time is 3h, the stirring time is 1.5h, the hydraulic retention time is 10h, and the COD of the effluent index of the bioreactor is 110mg / L, NH 4 -N is 17mg / L, TN is 25mg / L, TP is 1.5mg / L, water flows into the enzymatic wetland from the bioreactor, and the enzymatic wetland adopts three-stage progressive water distribution, so that the load at the water inlet is evenly distributed;

[0043] (2) Configure enzymatic wetland filler

[0044]Enzymatic wetland fillers include planting soil layer, water distribution layer, enzymatic layer, adsorption layer, calcium layer, aggregate layer, and protective soil layer. The planting soil layer is composed of soil, plant ash, and sawdust. , their particle sizes are 3.5mm, 1.5mm, 1.5mm, and th...

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Abstract

The invention discloses a biological / enzymatic wetland sewage disposing method, which is characterized by the following: setting the depth of wetland at 800-1000mm; adopting three-grade progressive water distribution; distributing evenly for water inlet end; filling enzymatic filler in the wetland; improving shockproof load ability; saving energy; reducing sewage disposing cost.

Description

technical field [0001] The invention relates to a sewage treatment method and a corresponding enzymatic wetland, in particular to a sewage treatment method combining a bioreactor and an enzymatic wetland. Background technique [0002] There are two main traditional sewage treatment methods: one is based on the biological treatment unit, followed by an auxiliary ecological unit, that is, the biological unit is used to treat the sewage to meet the relevant national discharge standards, and then the wetland unit is connected in series to further improve the quality of the effluent and improve the stability of the effluent The other is mainly based on wetland units, that is, the removal of pollution load is mainly completed by ecological units, just to prolong the service life of wetland units, and assist simple biological treatment in front of ecological units to remove large suspended particles and a small amount of dissolved organic pollution thing. [0003] The combination ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/00C02F3/02C02F3/32
CPCY02W10/10
Inventor 章北平刘礼祥陆谢娟王小涛肖波左椒兰刘真钱晓良李双菊李巍王瑾
Owner HUAZHONG UNIV OF SCI & TECH
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