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Biological filter culture method and water treatment method for underground water

A technology of biological filter and cultivation method, applied in biological water/sewage treatment, polluted groundwater/leachate treatment, sustainable biological treatment, etc., can solve the problems of long start-up period and unstable effluent quality.

Inactive Publication Date: 2013-06-05
HARBIN INST OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problems of long start-up period and unstable effluent water quality of existing biofilters for treating groundwater containing iron, manganese and arsenic, and to provide a method for cultivating biofilters and a water treatment method for groundwater

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  • Biological filter culture method and water treatment method for underground water

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specific Embodiment approach 1

[0013] Specific embodiment one: the cultivation method of the biofilter of the present embodiment is carried out according to the following steps:

[0014] 1. Take the backwash water in stable operation, and then add (NH 4 ) 2 CO 3 、KH 2 PO 4 , NaCl, MgSO 4 and NaNO 3 , where backwash water and (NH 4 ) 2 CO 3 The ratio of 6L: 47g, backwash water and KH 2 PO 4 The ratio of 6L: 57g, backwash water and MgSO 4 The ratio of backwash water to NaCl is 3L: 25g, the ratio of backwash water to NaCl is 6L: 75g, backwash water to NaNO 3 The ratio of 3L: 5g, then add FeSO 4 ·7H 2 O, MnSO 4 ·H 2 O, NaAsO 2 and NaH 2 AsO 4 , to get a mixed solution, Fe in the mixed solution 2+ The concentration is 3mg / L, Mn 2+ The concentration of As is 1mg / L, and the concentration of As is 100μg / L;

[0015] 2. Pass the mixed solution prepared in step 1 into the biofilter 2, and open the micro-aeration system 9 at the same time to make the dissolved oxygen in the biofilter 2 be 7mg / L, cu...

specific Embodiment approach 2

[0016] Embodiment 2: This embodiment differs from Embodiment 1 in that the cultivation time in step 2 is 35 days. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0017] Specific embodiment three: the water treatment method of groundwater in this embodiment is carried out according to the following steps:

[0018] 1. Close the bottom micro-aeration system 9, pass the raw water through the drop water aeration system 1, until the dissolved oxygen in the drop water aeration system 1 is 6-8 mg / L, and the water is discharged;

[0019] Two, pass the effluent of step 1 into the biofilter 2 cultivated by specific embodiment 1, run to the concentration of iron in the effluent less than 0.3mg / L, the concentration of manganese less than 0.1mg / L, the concentration of arsenic less than 10μg / L, run at a filtration rate of 3m / h until the concentration of iron in the effluent is less than 0.3mg / L, the concentration of manganese is less than 0.1mg / L, and the concentration of arsenic is less than 10μg / L, and run at a filtration rate of 4m / h until the concentration of iron in the effluent is less than 0.3mg / L, manganese concentration less than 0.1mg / L, ar...

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Abstract

The invention provides a biological filter culture method and a water treatment method for underground water, relates to a biological filter culture method and solves the technical problems that the biological filter layer start period is long and effluent water is unstable in quality in the existing treatment of underground water containing iron, manganese and arsenium. The biological filter culture method comprises the following steps: taking back flush water in stable operation; adding (NH4)2CO3, KH2PO4, NaCl, MgSO4 and NaNO3; further adding FeSO4.7H2O, MnSO4.H2O, NaAsO2 and NaH2AsO4 to obtain a mixed solution; and introducing the mixed solution into a biological filter, and culturing for 30-40 days to finish the culture of the biological filter. The invention shortens the start period; and after underground water is treated by the method provided by the invention, the quality of effluent water conforms to hygienic standard for domestic drinking water (GB5749-2006).

Description

technical field [0001] The invention relates to a cultivation method of a biofilter. Background technique [0002] At present, for the treatment of groundwater containing iron, manganese and arsenic, the start-up period of biological iron, manganese and arsenic removal engineering technology is relatively long, and it is difficult and frequent Backwashing will affect the attachment of microorganisms in the filter layer, and the supply of nutrients will also affect the growth of microorganisms. How to quickly cultivate an efficient and economical biological purification filter layer and realize the simultaneous and stable removal of iron, manganese, and arsenic in groundwater has not yet been resolved. Contents of the invention [0003] The purpose of the present invention is to solve the technical problems of long start-up period and unstable effluent water quality of existing biofilters for treating groundwater containing iron, manganese and arsenic, and provide a method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F103/06
CPCY02W10/10
Inventor 杨柳李相昆杨航张杰
Owner HARBIN INST OF TECH
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