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Remediation agent and remediation method for in-situ remediation of water body and sediment

An in-situ repair agent and repair agent technology, applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc., can solve problems such as increased treatment costs, hidden dangers, water quality safety, etc., to improve water quality The effect of water quality and substrate environment

Inactive Publication Date: 2017-06-20
HANGZHOU ENJOY ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In the existing in-situ restoration methods, water purification bacteria agents, growth-promoting liquids, biological detoxification liquids, and compound enzyme accelerators are often used, which not only increases the cost of treatment, but also has hidden dangers such as water quality safety; some use simple The method of adding porous solids to absorb bacteria agents into the water body, the effect is often not as expected

Method used

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  • Remediation agent and remediation method for in-situ remediation of water body and sediment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: turbidity reduction test

[0033] In this experiment, the concrete definite formula of composite restorative agent is: 5% by weight Na 2 h 2 Y, 40% quaternary ammonium chitosan, 10% dried and crushed filamentous algae, 10% attapulgite, 10% calcium chloride, 5% magnesium sulfate, 10% gypsum powder, and 10% cement powder.

[0034] In order to understand the turbidity-reducing effect of the composite restorative, 0.5% kaolin suspension was prepared, and different concentrations of turbidity-reducing tests were done. The specific tests and results are as follows:

[0035] Prepare 7L of 0.5% kaolin suspension with tap water, put it in a plastic bucket, and use a 5W small water pump (for the water cluster tank) to carry out self-circulation stirring in water for 5 hours before use. Use six 2L beakers to measure the fully mixed suspension, put it into a stirrer, and add the compound restoration agent, the dosage is 0mg / l, 20mg / l, 40mg / l, 60mg / l, 80mg / l, 100mg ...

Embodiment 2

[0038] Embodiment 2: water restoration experiment

[0039] Specific formulation of the restorative: 10% by weight Na 2 h 2Y, 25% quaternary ammonium chitosan, 2% dried and crushed filamentous algae, 20% attapulgite, 8% calcium chloride, 10% magnesium sulfate, 20% gypsum powder, and 5% cement powder.

[0040] In order to verify the improvement effect of the restoration agent on the water body indicators, an experiment was carried out on the comprehensive wastewater of the factory. The specific method is to take 5L of water sample to the laboratory, mix the water sample evenly, take 1.0L from one beaker as the control group; take 1.0L from each of the other 3 beakers as the test group, put it into the stirring bar, and add the composite repair Dosage of 40 mg / l was placed on a magnetic stirrer, first rotated at high speed (600r / min) for 2 minutes, then rotated at low speed (60r / min) for 4 minutes, and then stood still for 30 minutes.

[0041] Detection Indicator R...

Embodiment 3

[0044] The method for in-situ restoration of water body and sediment comprises the following steps:

[0045] Step 1: Prepare the restoration agent according to the requirements of the water body to be treated or the restoration of the sediment. The concrete formula of restoration agent is: 5% by weight Na 2 h 2 Y, 40% quaternary ammonium chitosan, 10% dried and crushed filamentous algae, 10% attapulgite, 10% calcium chloride, 5% magnesium sulfate, 10% gypsum powder, and 10% cement powder.

[0046] Step 2: First use the restoration agent to conduct a small laboratory test to obtain the best application dosage and provide reference for application.

[0047] Step 3: Start fan aeration or water agitator and sediment mixer for 5-10 minutes while injecting restoration agent to promote full mixing of water body / sediment to be restored and restoration agent.

[0048] Step 4: Shut down the aeration and stirring system, so that the restoration agent absorbs heavy metals, N, P, organi...

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Abstract

The invention provides a remediation agent and a remediation method for in-situ remediation of a water body and sediment. The remediation agent is prepared by mixing a metal ion complexing agent, an adsorbent, a high efficient flocculant, a specific gravity regulator, a curing agent, auxiliary agents and other components according to a certain proportion, and then compounding the mixture; the remediation agent is added into the water body or the sediment to be treated, and is mixed with the water body or the sediment by stirring; heavy metals in the water body or muddy water are subjected to in-situ complexing of the remediation agent, and pollutants and flocculations in the water body are absorbed by the remediation agent, so as to float to the surface of the water body or transfer into the sediment, so that the aims of realizing in-situ collection and enrichment of the pollutants in the water body and enabling the pollutants to be solidified and sealed in the sediment are achieved; after the remediation agent is used, the water quality of the water body and the environment of the sediment are rapidly improved, and the natural construction of a water ecosystem is facilitated, so that the in-situ remediation of the water body and the sediment are realized. The remediation agent and the remediation method can be used for comprehensive remediation of eutrophic or organic and heavy metal seriously polluted lakes, rivers, reservoirs, wetlands and ponds.

Description

technical field [0001] The invention relates to an in-situ restoration agent and method for water body and sediment, belonging to the field of water environment protection. Background technique [0002] With the development of our country's economy, the problem of environmental pollution is becoming more and more serious, among which the pollution of water environment is more prominent. Due to agricultural non-point source pollution, industrial pollution, and untreated or substandard discharge of domestic sewage into natural water bodies, ponds, reservoirs, and lakes (Taihu Lake, Chaohu Lake, and Dianchi Lake) are flooded with cyanobacteria due to excessive N and P in water bodies. The green tide (enteromorpha) in the Yellow Sea waters has been breaking out year after year since 2007; the urban and rural rivers are overwhelmed by the self-purification ability, and the rivers are black and smelly. The pollution of these water environments has seriously affected the beautific...

Claims

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Application Information

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IPC IPC(8): C02F1/00C02F1/28C02F1/52C02F11/00C02F101/20C02F101/30
CPCC02F1/00C02F1/28C02F1/52C02F11/00C02F11/008C02F2101/20C02F2101/30C02F2103/007
Inventor 周呈祥叶伟武甄凯旋
Owner HANGZHOU ENJOY ENVIRONMENTAL PROTECTION TECH
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