Plant-microorganism comprehensive contaminated soil and underground water remediation system

Abstract

The invention provides a plant-microorganism comprehensive contaminated soil and underground water remediation system, and mainly relates to the technical field of environmental remediation. The plant-microorganism comprehensive contaminated soil and underground water remediation system comprises an upstream water injection well, a downstream water pumping well, a polylactide limiting layer, a diaphragm pump, a nutrient substance injection well, an oxygen injection well, a nutrient substance and microorganism filling area and a water-resisting layer. The system comprises the beneficial effectsthat according to soil and underground water pollution distribution conditions, plant root systems are forced to go deep into soil and underground water of a polluted area; meanwhile, the effects ofmicroorganisms are combined, the rhizosphere micro-domain pollutant degradation and migration conversion efficiency is improved, and an underground water pumping-reinjection mode is combined, so thatthe underground water circulation efficiency is improved, the contact probability of soil and pollutants in underground water with plant root systems and microorganisms is improved, underground wateraeration is increased, and organic pollution degradation is accelerated.

Description

technical field

[0001] The invention mainly relates to environmental remediation technology, in particular to a plant-microorganism comprehensive remediation of polluted soil and groundwater systems. Background technique

[0002] With the growth of my country's population, the acceleration of industrialization and the improvement of per capita living standards, a large number of industrial and agricultural production and domestic pollutants have entered the soil and groundwater, posing a great threat to ecological security and human health. The "National Soil Pollution Survey Bulletin" released in 2014 and the exposure of many pollution incidents in recent years have shown that the problem of soil and groundwater pollution in my country has become increasingly prominent, and the restoration and treatment of polluted soil and groundwater is urgent.

[0003] The remediation methods of soil and groundwater can be fundamentally divided into three categories: physical remediation...

Examples

Embodiment

[0029] Using birch as restoration plants, the following experiments were carried out.

[0030] A remediation system for remediating polluted groundwater with plant-microorganism joint, specifically comprising the following steps:

[0031] S1: Focusing on pollution sources, investigate the types, concentrations, pollution depths and flow directions of groundwater pollutants;

[0032] S2: Select the pollution point with a groundwater pollution depth of 10-15m, and use large-diameter auger technology to excavate a well with a diameter of 1m and a depth at the groundwater level of the pollution point ±0.5m;

[0033] S3: Use the horizontal drilling process to excavate the channel in the contaminated area, and place the nutrients and microorganisms (Streptomyces convolusus Act12 and biochar) required for plant growth in the channel to form a nutrient and microbial filling area;

[0034] S4: Set a polylactide restriction layer around the well, close to the inside of the well, with t...

technical field

[0001] The invention mainly relates to environmental remediation technology, in particular to a plant-microorganism comprehensive remediation of polluted soil and groundwater systems. Background technique

[0002] With the growth of my country's population, the acceleration of industrialization and the improvement of per capita living standards, a large number of industrial and agricultural production and domestic pollutants have entered the soil and groundwater, posing a great threat to ecological security and human health. The "National Soil Pollution Survey Bulletin" released in 2014 and the exposure of many pollution incidents in recent years have shown that the problem of soil and groundwater pollution in my country has become increasingly prominent, and the restoration and treatment of polluted soil and groundwater is urgent.

[0003] The remediation methods of soil and groundwater can be fundamentally divided into three categories: physical remediation...

Examples

Embodiment

[0029] Using birch as restoration plants, the following experiments were carried out.

[0030] A remediation system for remediating polluted groundwater with plant-microorganism joint, specifically comprising the following steps:

[0031] S1: Focusing on pollution sources, investigate the types, concentrations, pollution depths and flow directions of groundwater pollutants;

[0032] S2: Select the pollution point with a groundwater pollution depth of 10-15m, and use large-diameter auger technology to excavate a well with a diameter of 1m and a depth at the groundwater level of the pollution point ±0.5m;

[0033] S3: Use the horizontal drilling process to excavate the channel in the contaminated area, and place the nutrients and microorganisms (Streptomyces convolusus Act12 and biochar) required for plant growth in the channel to form a nutrient and microbial filling area;

[0034] S4: Set a polylactide restriction layer around the well, close to the inside of the well, with t...

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