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A solar photovoltaic driven bioelectrochemical soil remediation system and method

A solar photovoltaic and bioelectrochemical technology, applied in the restoration of polluted soil, etc., can solve the problems of persistent organic pollutants, achieve the effect of accelerating the electron transfer rate, increasing the contact area, and solving the persistent residual

Active Publication Date: 2020-02-18
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a solar photovoltaic driven bioelectrochemical soil remediation system with solar photovoltaic system as the electric driving force, which can effectively solve the problem of persistent residual organic pollutants in polluted soil

Method used

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  • A solar photovoltaic driven bioelectrochemical soil remediation system and method
  • A solar photovoltaic driven bioelectrochemical soil remediation system and method

Examples

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Effect test

Embodiment 1

[0032] In this embodiment, the biological filter bed is to use sand as the filter material; the anode electrode is a nickel metal organic framework material, and the cathode electrode is a graphite rod; the voltage for driving bioelectrochemical soil restoration is 0V, the soil humidity is 50%, and the pH is 6, and the soil pollutants are petroleum aromatic hydrocarbons, phenols and organophosphorus pesticides.

[0033] Among them, the spray solution contains 0mg / L of surfactant per liter of water; the concentration of carbon source is 0g / L; the concentration of nitrogen source is 0g / L; the concentration of phosphorus source is 0g / L; the metal ion is 0.1g MgSO 4 ·7H 2 O, 1 mg FeCl 3 , 0.1g KH 2 PO 4 , 0.05g anhydrous CaCl 2 ; The vitamin concentration of essential nutrients for microorganisms is 0.5ml / L.

Embodiment 2

[0035] In the present embodiment, the biological filter bed is made of crushed stone; the anode electrode is a zinc metal organic framework material, and the cathode electrode is a stainless steel mesh; and the voltage for driving bioelectrochemical soil restoration is 1V, and the soil humidity is 65%. The pH was 7, and the soil pollutants were petroleum aromatics, phenols, and organophosphorus pesticides.

[0036] Wherein the spray solution contains surfactant 50mg / L according to per liter of water, wherein the ratio of sodium dodecylbenzenesulfonate, quaternary ammonium salt and Tween 80 is: 1:2:3; carbon source concentration is 50g / L L, wherein the ratio of glucose, sodium acetate, sodium formate and sucrose is: 1:1:1; the concentration of nitrogen source is 5g / L; the concentration of phosphorus source is 2.5g / L; the metal ion is 1g MgSO 4 ·7H 2 O, 10mgFeCl 3 , 1g KH 2 PO 4 , 0.5g anhydrous CaCl 2 ; The vitamin concentration of essential nutrients for microorganisms is...

Embodiment 3

[0038] In the present embodiment, the biological filter bed is made of plastic as a filter material; the anode electrode is an iron metal organic framework material, and the cathode electrode is a graphite rod; and the voltage for driving bioelectrochemical soil restoration is 2V, the soil humidity is 80%, and the pH is 8, and the soil pollutants are petroleum aromatic hydrocarbons, phenols and organophosphorus pesticides.

[0039] Wherein the spray solution contains surfactant 100mg / L according to per liter of water, wherein the ratio of sodium dodecylbenzenesulfonate, quaternary ammonium salt and Tween 80 is: 3:2:1; carbon source concentration is 100g / L L, wherein the ratio of glucose, sodium acetate, sodium formate and sucrose is: 4:3:2:1; the concentration of nitrogen source is 10g / L; the concentration of phosphorus source is 5g / L; the metal ion is 2g MgSO 4 ·7H 2 O, 20mgFeCl 3 , 2g KH 2 PO 4 , 1g anhydrous CaCl 2 ; The vitamin concentration of essential nutrients for...

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Abstract

The invention relates to a bioelectrochemistry soil remediation system driven by solar photovoltaic. The bioelectrochemistry soil remediation system comprises a PLC control system, a solar photovoltaic system, a spraying system, a biofilter, a supporting layer, a soil filling room and a bioelectrochemistry reaction chamber; the solar photovoltaic system comprises a solar cell panel and a photovoltaic plate controller; the solar cell panel is connected with an accumulator through the photovoltaic plate controller; the accumulator is connected with a anode electrode and a cathode electrode in the bioelectrochemistry reaction chamber; the soil filling system is arranged above the bioelectrochemistry reaction chamber through the supporting layer; the biofilter is arranged above the soil filling room; and the spraying system is arranged above the biofilter through a circulating water pump. According to the bioelectrochemistry soil remediation system driven by solar photovoltaic, the coupling of the solar photovoltaic system, the bioelectrochemistry system and microbial polluted soil remediation technology can effectively improve the degradation efficiency of soil organic pollutants.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a solar photovoltaic driven bioelectrochemical soil remediation system and method. Background technique [0002] With the rapid development of industrialization, the application of pesticides and sewage irrigation have had an increasing impact on the soil environment. Aiming at the status quo of soil pollution, a variety of remediation technologies such as biology, physics, and chemistry have been developed. In practical applications, physical remediation is affected by factors such as soil heterogeneity and permeability, and chemical remediation will produce more toxic side effects. product. At present, microbial remediation technology with the advantages of in-situ remediation and no secondary pollution has become a research hotspot. The slow natural purification speed of microorganisms to organic pollutants limits its practical application. [0003] The biological f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/08B09C1/10
CPCB09C1/08B09C1/085B09C1/10
Inventor 陈英文范梦婕孙靖云徐源沈树宝祝社民
Owner NANJING TECH UNIV