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Low-cost, environmental-protection and high-efficiency alga removal combination material

An environmentally friendly, combined material technology, applied in polluted waterway/lake/pond/river treatment, water/sewage treatment, sterilization/microdynamic water/sewage treatment, etc., can solve the distribution of natural crab shells and shrimp shells Areas and seasons are limited, recovery costs are high, and applications cannot be used, so as to reduce the risk of emergencies, reduce costs, and have a wide range of applications.

Inactive Publication Date: 2016-06-15
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the distribution area and season of natural crab shells and shrimp shells are limited, and the recycling cost is too high, so they cannot be used in the actual emergency response to sudden algae bloom accidents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Use high-efficiency algae removal combination materials to remove high-density algae wastewater (equivalent to algae cell density of 2.0×10 9 cell / L), wherein the natural mineral material adopts zeolite and sepiolite, and the removal aid adopts chitosan solution. Adopt the method of the present invention to strengthen algae removal validation research: 1) pour OD into 5 reactors 680 Add 0.5g / L, 1.0, 1.5, 2.0, and 2.5 natural mineral modified materials to 500mL of algae-containing suspension at 0.1; Remove additives; 3) The mixed solution is first stirred rapidly (200-250r / min) for 3 minutes, and then slowly (100-150r / min) for 15 minutes; 4) After the algae mixed solution is left to stand, use a sampler hourly Take a water sample 3cm below the water surface to measure the OD 680 , and calculate the removal rate of algae. The removal results show that when the modified natural mineral algae flocculation material reaches 1.5g / L, the removal rate of algae has reached mor...

Embodiment 2

[0015] High-efficiency algae-removing combination materials are used to remove high-concentration algae in eutrophic reservoir water, and the density of algae cells in the upper part of the reservoir is 1.0×10 8 --2.0×10 9 cell / L, add modified sepiolite flocculant to the reservoir, and the control dosage is 0.3kg / m 2 , using a marine propeller to stir; after stirring for 5-10 minutes, add 200mL / m 2 Chitosan solution, and using a marine propeller to continue stirring for 3-20 minutes. After standing still, water samples were taken hourly at 5cm below the water surface to determine the OD of algae 680 . The removal results showed that the modified sepiolite flocculation material reached 0.3kg / m 2 , the removal rate of algae in the surface water body can reach more than 92%, and the removal rate of algae toxin can reach 97% (the three-dimensional fluorescence peak value is from 3706 to 114.25).

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Abstract

The invention relates to a low-cost, environmental-protection and high-efficiency alga removal combination material. The high-efficiency alga removal combination material capable of rapidly eliminating algae in water and continuously reducing the alga bloom risk of water is disclosed against abundant growth of alga bloom in water reservoirs, lakes, drinking water sources or scenic water. The high-efficiency alga removal combination material comprises a natural mineral modified material and a removal assistant. The natural mineral modified material mainly comprises zeolite, active carbon, mica powder, kaolin or diatomite and other macro-porous mineral matter powders as raw materials, and can adsorb and co-precipitate alga particles and phosphates through acid modification and function group fixing. The modified material can be added to eutrophic water in an in situ manner, and can also be used in drinking water factories. When in situ addition is carried out, the natural mineral modified material is only added if the density of algae in water, and the removal assistant is added if the density of the algae is high in order to improve the effect. The alga removal material does not use toxic substances in the modification process, can efficiently remove algae in the water, and also can remove nitrogen and phosphorus, reduce release of intracellular toxic substances and reduce the alga bloom risk. The natural mineral modified material is especially suitable for alga control of the drinking water sources, the lakes and urban landscape waters, or is used in stringent control or risk prevention of the alga bloom.

Description

technical field [0001] The invention belongs to the technical field of water quality safety assurance of lakes, reservoirs or drinking water sources, and in particular relates to the preparation and application method of a low-cost, environment-friendly, high-efficiency algae-removing composite material. Background technique [0002] Algae bloom pollution accidents are gradually becoming an important form of water pollution in my country. How to realize low-cost, harmless and resourceful algal blooms in water has become a research hotspot all over the world and has broad market potential. At present, the common algae removal technologies at home and abroad mainly include artificial / mechanical algae removal and chemical algae removal. Among them, artificial / mechanical algae removal usually uses mechanical salvage or manual salvage to separate algae from water, which can avoid secondary water pollution. Pollution, this method of algae removal does not need to add chemicals to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C02F1/52C02F1/50
CPCC02F1/56C02F1/50C02F1/5236C02F1/5263C02F2103/007
Inventor 彭剑峰李浩宋永会姜诗慧颜秉斐
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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