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Self-oxygen-release filler for repairing black and odorous water, and preparation method and application thereof

A black and odorous water body, self-releasing oxygen flexible technology, applied in chemical instruments and methods, water aeration, water pollutants, etc., can solve the problems of increased sediment, frequent black and odorous water phenomenon, and unfavorable ecosystem restoration. Achieve the effect of increasing dissolved oxygen, weakening the endogenous pollution of sediment, and improving the quality of water environment

Active Publication Date: 2020-08-21
CHINA URBAN CONSTR DESIGN & RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oxygen release rate is too fast in the general oxygen release agent reoxygenation measures, and the slow release oxygen agent directly added to the sediment will increase the sediment in the river sediment during the actual operation process, and the phenomenon of black and odor in the water body is easy to repeat , Not conducive to ecosystem restoration and other issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preparation method of calcium peroxide oxygen release agent granule:

[0041] Step 1, weigh a certain amount of polylactic acid particles, and add it into methylene chloride according to the mass ratio, stir and dissolve, and stop stirring when it is completely dissolved in methylene chloride;

[0042] Step 2, adding calcium peroxide powder into the solution, stirring evenly, so that the solution becomes a uniform suspension;

[0043] Step 3, the solution is placed in a fume hood, and when the dichloromethane volatilizes until the solution presents a colloidal semi-solid, it is extruded into pellets;

[0044] Step 4, the pellets are placed in a fume hood, and the dichloromethane is completely volatilized to obtain calcium peroxide oxygen release agent particles.

[0045] In Step 1 of this embodiment, the mass ratio of polylactic acid particles to methylene chloride should be less than or equal to 2.

[0046] In step 2 of this embodiment, the mass ratio of polylactic...

Embodiment 2

[0051] For the self-releasing oxygen-releasing filler for repairing black and odorous water bodies, the self-oxygen-releasing filler is uniformly mixed by river sediment and calcium peroxide oxygen-releasing agent particles (prepared by Example 1), activated carbon, sodium alginate, calcium carbonate, and zeolite production.

[0052] The distribution ratio of each component is: in every 100kg of river bottom mud, add 15kg of calcium peroxide slow-release oxygen agent particles, 5kg of activated carbon, 1kg of sodium alginate, 1kg of calcium carbonate, and 15kg of zeolite.

[0053] Among them, the river sediment is taken from the polluted river and dehydrated by sludge dewatering equipment. The water content of the river sediment is 60%.

[0054] The components of the self-releasing oxygen filler do not react by themselves, and are mixed evenly by rotating and stirring. In order to prevent the calcium peroxide from reacting with the residual water in the river sediment, calcium...

Embodiment 3

[0057] For the self-releasing oxygen-releasing filler for repairing black and odorous water bodies, the self-oxygen-releasing filler is uniformly mixed by river sediment and calcium peroxide oxygen-releasing agent particles (prepared by Example 1), activated carbon, sodium alginate, calcium carbonate, and zeolite production.

[0058] The distribution ratio of each component is: in every 100kg of river bottom mud, add 20kg of calcium peroxide slow-release oxygen agent particles, 10kg of activated carbon, 5kg of sodium alginate, 5kg of calcium carbonate, and 20kg of zeolite.

[0059] Among them, the river sediment is taken from the polluted river and dehydrated through a filter press. The water content of the river sediment is 65%.

[0060] After the self-releasing filler is made, it should be left to stand for a period of time to further reduce the moisture content to about 45%, so as to ensure that it has sufficient density so that it can be air-dried in a natural state.

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PUM

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Abstract

The invention discloses a self-oxygen-release filler for repairing black and odorous water , and a preparation method and application thereof. The self-oxygen-release filler has the characteristics ofreasonable formula, low cost, environmental friendliness, less occupied land and the like. The river sediment is subjected to resourceful treatment and utilization, and nitrogen and phosphorus in water can be removed while dissolved oxygen in the water is increased and endogenous pollution of the sediment is weakened. Meanwhile, the pH of the water can be gradually improved, so that the water environment quality is further improved, the water eutrophication occurrence risk is reduced, and the water ecological system recovery is promoted.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to the treatment of black and odorous water bodies, in particular to a self-releasing oxygen filler for repairing black and odorous water bodies and its preparation method and application. Background technique [0002] The level of pollutants discharged by the city into the water exceeds the self-purification capacity of the water. A large number of organic pollutants lead to an increase in the rate of oxygen consumption in the water, which leads to anoxic and anaerobic reactions in the water. Black and smelly phenomenon. At present, the black and odorous water body has been preliminarily treated through various treatment measures, but there are still recurrences. The existence of black and odorous water bodies has seriously affected urban landscape construction and water environment safety, and reduced the people's sense of well-being to the ecological environ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F7/00C02F3/34C02F1/28C02F1/58C02F1/66C02F101/10C02F101/16
CPCC02F7/00C02F3/34C02F1/283C02F1/66C02F1/58C02F2101/105C02F2101/16C02F2103/007C02F2303/02Y02W10/10
Inventor 王嗣禹杨龙王香春储杨阳张敏
Owner CHINA URBAN CONSTR DESIGN & RES INST CO LTD
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