Iron-carbon microelectrolysis coupled emerged plant module and application thereof

Abstract

The invention belongs to the field of black and odorous / polluted water remediation, and discloses an iron-carbon microelectrolysis coupled emerged plant module and an application thereof. The iron-carbon microelectrolysis coupled emerged plant module comprises a floating plate, planting baskets and an aeration system, the planting baskets are mounted on the floating plate, emergent plants are fixed in the planting baskets, the roots of the emergent plants are wrapped with an iron-carbon filler and are fixed with leak-proof bags, the peripheries of the leak-proof bags are surrounded by ceramsite, and the emergent plants are fixed in the planting baskets by ceramic. The iron-carbon microelectrolysis coupled emerged plant module is applied to black and odorous / polluted water remediation, cansignificantly reduce the chroma and odor thresholds of the black and odorous / polluted water within 2-4 days, and can realize no obvious odor, transparent water, a COD removal rate of 80% or above, anammonia nitrogen removal rate of 99% or above, a phosphorus removal rate of 97% or above, a dissolved oxygen concentration of 3 mg / L or above, the water quality reaching surface water level IV water standards and water ecosystem remediation within 16-22 days.

Description

technical field

[0001] The invention belongs to the field of repairing black and odorous / polluted water bodies, and in particular relates to an iron-carbon micro-electrolysis coupled emergent plant module and its application. Background technique

[0002] In recent years, with the rapid development of the economy, the construction of the sewage treatment system cannot keep up with the rapid urbanization process. A large amount of pollutants have entered the river. Seasonal or perennial black odor.

[0003] The mechanism of causing black and odor is still unclear, but it is generally believed that high organic pollution load, nitrogen, phosphorus, Fe, S, Mn and low DO are the main causes of black and odor. High organic pollution load consumes a large amount of dissolved oxygen to create an anaerobic environment, and anaerobic microorganisms degrade dissolved organic matter, such as carbohydrates, fatty acids, and proteins, into small molecules including odorous organic acids...

Examples

Embodiment 1

[0035] An iron-carbon micro-electrolysis coupling emergent plant module, the floating plate is 20×20cm, and there are 4 planting baskets on the floating plate, each planting basket has 2 spinach plants, each plant is wrapped by iron-carbon filler, and is sealed with leak-proof The bag (specifically a filter screen with fine mesh) is fixed, and the periphery is fixed in the planting basket with ceramsite, and the mass ratio of iron-carbon filler and ceramsite is 35%.

[0036] Take 7L of black and odorous water in the simulated reaction device (L×W×H: 25×25×20cm), and fix the above-mentioned iron-carbon micro-electrolysis coupled emergent plant module 7cm below the water to ensure that the module is fully in contact with the black and odorous raw water. No aeration system. The COD of the initial black and odorous water body was 120.20mg / L, the ammonia nitrogen was 44.72mg / L, the TP was 4.25mg / L, and the DO was 0.48mg / L. After 3 days of treatment, the color of the black and odoro...

Embodiment 2

[0038] An iron-carbon micro-electrolysis coupling emergent plant module, the floating plate is 20×20cm, and there are 5 planting baskets on the floating plate, each planting basket has 1 water spinach, and each water spinach is wrapped by iron-carbon filler, with a leak-proof The bag (specifically a filter screen with fine mesh) is fixed, and the periphery is fixed in the planting basket with ceramsite, and the mass ratio of iron-carbon filler and ceramsite is 17.5%.

[0039] Take 7L of black and odorous water in the simulated reaction device (L×W×H: 25×25×20cm), and fix the above-mentioned iron-carbon micro-electrolysis coupled emergent plant module 7cm below the water to ensure that the module is fully in contact with the black and odorous raw water. No aeration system. The COD of the initial black and odorous water body was 114.67mg / L, the ammonia nitrogen was 36.57mg / L, the TP was 2.71mg / L, and the DO was 0.32mg / L. After 3 days of treatment, the color of the black and odor...

Embodiment 3

[0041] An iron-carbon micro-electrolysis coupled emergent plant module, the floating plate is 25×25cm, and there are 9 planting baskets on the floating plate, each planting basket has 1 water spinach, and each water spinach is wrapped by iron-carbon filler, with a leak-proof The bag (specifically a filter screen with fine mesh) is fixed, and the periphery is fixed in the planting basket with ceramsite, and the mass ratio of iron-carbon filler and ceramsite is 52.5%.

[0042]Take 50L of black and odorous water in the simulated reaction device (L×W×H: 38×38×40cm), and fix the above-mentioned iron-carbon micro-electrolysis coupled emergent plant module 7cm below the water to ensure that the module is fully in contact with the black and odorous raw water. The bottom of the device is aerated, the aeration flow is set to 60ml / min, and the aeration time is set to 6h / d. The COD of the initial black and odorous water was 79.48mg / L, the ammonia nitrogen was 27.25mg / L, the TP was 2.73mg / ...

technical field

[0001] The invention belongs to the field of repairing black and odorous / polluted water bodies, and in particular relates to an iron-carbon micro-electrolysis coupled emergent plant module and its application. Background technique

[0002] In recent years, with the rapid development of the economy, the construction of the sewage treatment system cannot keep up with the rapid urbanization process. A large amount of pollutants have entered the river. Seasonal or perennial black odor.

[0003] The mechanism of causing black and odor is still unclear, but it is generally believed that high organic pollution load, nitrogen, phosphorus, Fe, S, Mn and low DO are the main causes of black and odor. High organic pollution load consumes a large amount of dissolved oxygen to create an anaerobic environment, and anaerobic microorganisms degrade dissolved organic matter, such as carbohydrates, fatty acids, and proteins, into small molecules including odorous organic acids...

Examples

Embodiment 1

[0035] An iron-carbon micro-electrolysis coupling emergent plant module, the floating plate is 20×20cm, and there are 4 planting baskets on the floating plate, each planting basket has 2 spinach plants, each plant is wrapped by iron-carbon filler, and is sealed with leak-proof The bag (specifically a filter screen with fine mesh) is fixed, and the periphery is fixed in the planting basket with ceramsite, and the mass ratio of iron-carbon filler and ceramsite is 35%.

[0036] Take 7L of black and odorous water in the simulated reaction device (L×W×H: 25×25×20cm), and fix the above-mentioned iron-carbon micro-electrolysis coupled emergent plant module 7cm below the water to ensure that the module is fully in contact with the black and odorous raw water. No aeration system. The COD of the initial black and odorous water body was 120.20mg / L, the ammonia nitrogen was 44.72mg / L, the TP was 4.25mg / L, and the DO was 0.48mg / L. After 3 days of treatment, the color of the black and odoro...

Embodiment 2

[0038] An iron-carbon micro-electrolysis coupling emergent plant module, the floating plate is 20×20cm, and there are 5 planting baskets on the floating plate, each planting basket has 1 water spinach, and each water spinach is wrapped by iron-carbon filler, with a leak-proof The bag (specifically a filter screen with fine mesh) is fixed, and the periphery is fixed in the planting basket with ceramsite, and the mass ratio of iron-carbon filler and ceramsite is 17.5%.

[0039] Take 7L of black and odorous water in the simulated reaction device (L×W×H: 25×25×20cm), and fix the above-mentioned iron-carbon micro-electrolysis coupled emergent plant module 7cm below the water to ensure that the module is fully in contact with the black and odorous raw water. No aeration system. The COD of the initial black and odorous water body was 114.67mg / L, the ammonia nitrogen was 36.57mg / L, the TP was 2.71mg / L, and the DO was 0.32mg / L. After 3 days of treatment, the color of the black and odor...

Embodiment 3

[0041] An iron-carbon micro-electrolysis coupled emergent plant module, the floating plate is 25×25cm, and there are 9 planting baskets on the floating plate, each planting basket has 1 water spinach, and each water spinach is wrapped by iron-carbon filler, with a leak-proof The bag (specifically a filter screen with fine mesh) is fixed, and the periphery is fixed in the planting basket with ceramsite, and the mass ratio of iron-carbon filler and ceramsite is 52.5%.

[0042]Take 50L of black and odorous water in the simulated reaction device (L×W×H: 38×38×40cm), and fix the above-mentioned iron-carbon micro-electrolysis coupled emergent plant module 7cm below the water to ensure that the module is fully in contact with the black and odorous raw water. The bottom of the device is aerated, the aeration flow is set to 60ml / min, and the aeration time is set to 6h / d. The COD of the initial black and odorous water was 79.48mg / L, the ammonia nitrogen was 27.25mg / L, the TP was 2.73mg / ...

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