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A filler for artificial wetland water treatment and preparation method thereof

A constructed wetland and water treatment technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc., to achieve the effects of improving effluent water quality, promoting removal, and enhancing denitrification capacity

Inactive Publication Date: 2015-08-12
NANJING COLLEGE OF CHEM TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a new type of filler for artificial wetlands capable of slow release of oxygen and enhanced denitrification and phosphorus removal and a preparation method thereof, so as to solve the problems existing in the above-mentioned artificial wetland technology and improve its sewage purification ability. Simple, sufficient raw materials, low cost, etc.

Method used

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  • A filler for artificial wetland water treatment and preparation method thereof
  • A filler for artificial wetland water treatment and preparation method thereof
  • A filler for artificial wetland water treatment and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A preparation method for fillers for artificial wetland water treatment, comprising the following steps:

[0031] (1) Mix volcanic slag and sodium hydroxide evenly, and the mass ratio of soda to ash is 1.0. Put the mixture in a muffle furnace and roast it at 500°C for 2 hours, then cool it to room temperature, grind it and add water, silicon aluminum Adjust the ratio to 5, place it on a magnetic stirrer at room temperature, heat up to 90°C for 2 hours, then heat up to 95°C for 2 hours, filter and wash until the pH value is 7, put it in an oven at 80°C and dry Dry for 4 hours to get the best nitrogen adsorbent.

[0032] (2) Gradually adjust the pH value of the solution with a lanthanum ion concentration of 0.5% to 10, add the best nitrogen adsorbent prepared in step 1 according to 1:50 (solid-to-liquid ratio), soak for more than 16 hours, filter the filter cake in Dry at 110°C, place in a muffle furnace and bake at 450°C for 1 hour, grind and sieve to 120 mesh as the be...

Embodiment 2

[0037] (1) Mix volcanic slag and sodium hydroxide evenly, and the mass ratio of soda to ash is 1.2. Put the mixture in a muffle furnace and roast it at 700°C for 2 hours, then cool it to room temperature, grind it and add water, silicon aluminum Adjust the ratio to 6, place it on a magnetic stirrer at room temperature, heat up to 90°C for 2 hours, then heat up to 95°C for 2 hours, filter and wash until the pH value is 7, and put it in an oven for drying at 80°C Dry for 4 hours to get the best nitrogen adsorbent.

[0038](2) Gradually adjust the pH value of the solution with a lanthanum ion concentration of 0.5% to 10, add the best nitrogen adsorbent prepared in step 1 according to 1:50 (solid-to-liquid ratio), soak for more than 16 hours, filter the filter cake in Dry at 110°C, place in a muffle furnace and bake at 470°C for 1 hour. After grinding and sieving, 120 mesh is the best nitrogen and phosphorus adsorbent.

[0039] (3) Put the limestone into a muffle furnace and roas...

Embodiment 3

[0043] (1) Mix volcanic slag and sodium hydroxide evenly, and the mass ratio of soda to ash is 1.5. Put the mixture in a muffle furnace and roast it at 900°C for 2 hours, then cool it to room temperature, grind it and add water, silicon aluminum Adjust the ratio to 8, place it on a magnetic stirrer at room temperature, heat up to 90°C for 2 hours, then heat up to 95°C for 2 hours, filter and wash until the pH value is 7, put it in an oven at 80°C and dry Dry for 4 hours to get the best nitrogen adsorbent.

[0044] (2) Gradually adjust the pH value of the solution with a lanthanum ion concentration of 0.5% to 10, add the best nitrogen adsorbent prepared in step 1 according to 1:50 (solid-to-liquid ratio), soak for more than 16 hours, filter the filter cake in Dry at 110°C, place in a muffle furnace and bake at 500°C for 1 hour. After grinding and screening, 120 mesh is the best nitrogen and phosphorus adsorbent.

[0045] (3) Put the limestone into a muffle furnace and roast it...

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Abstract

The invention relates to filler used for constructed wetland water treatment and a preparation method of the filler. The invention aims at providing a novel constructed wetland filler which is capable of realizing slowly releasing oxygen and reinforcing nitrogen and phosphorus removal and a preparation method of the filler. The filler used for constructed wetland water treatment is volcanic cinder particles which are loaded with a rare-earth nitrogen and phosphorus adsorbent and a slow-release oxygen material, and have particle diameters of 5-15mm. The filler can be used for increasing the sewage purifying capacity of the constructed wetland. And the preparation method has the characteristics of simple process, sufficient raw materials, low cost, and the like.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and specifically relates to a new type of artificial wetland filler that can simultaneously release oxygen slowly and strengthen denitrification and phosphorus removal, and is suitable for domestic sewage, polluted surface water, non-point source sewage, and sewage treatment plants in villages and towns or tourist attractions Treatment of tail water and wastewater with high concentration of ammonia nitrogen. Background technique [0002] At present, my country's water environment is deteriorating day by day, and problems such as eutrophication of lakes, red tides in coastal waters, and organic pollution of rivers and reservoirs have emerged, threatening the safety of water diversion for residents and the health of the people. Constructed wetland sewage treatment process has the characteristics of good water purification effect, low infrastructure operation cost, low energy consum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/32C04B26/10
CPCY02W10/10
Inventor 董婵彭波王鑫华高奔马慧韩迪仓理胡虹陆新华
Owner NANJING COLLEGE OF CHEM TECH
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