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Wastewater treatment composite filler containing zeolite and pulverized fuel ash

A technology for wastewater treatment and composite filler, which is applied in the field of zeolite and fly ash wastewater treatment composite filler, and non-sintered porous spherical zeolite ceramsite-type composite filler, which can solve the problems of clogging, difficult zeolite particle shape, low porosity, etc. Achieve the effects of recycling resources, environmental benefits and economic benefits, obvious environmental benefits and economic benefits, and simple preparation process

Inactive Publication Date: 2009-12-23
NORTHEAST DIANLI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The emergence of biological zeolites has opened up new avenues for the application of zeolites in water treatment, but the particle shape of zeolites has also brought difficulties to this technology
The zeolite currently used has irregular appearance and poor mechanical strength. It will inevitably cause damage to varying degrees during operation and lose its performance. The direct consequence will lead to disturbance of effluent water quality.
In addition, the porosity is low, the water flow resistance is large, and it is easy to cause blockage

Method used

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  • Wastewater treatment composite filler containing zeolite and pulverized fuel ash
  • Wastewater treatment composite filler containing zeolite and pulverized fuel ash
  • Wastewater treatment composite filler containing zeolite and pulverized fuel ash

Examples

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Effect test

Embodiment 1

[0028] Example 1: Preparation of composite filler for zeolite and fly ash wastewater treatment.

[0029] The raw materials used in the present invention are purchased from zeolite powder produced by Jiutai Zeolite Mining Company in Jilin Province, Class II fly ash (national Class I fly ash) from Jilin Yuanyuan Thermal Power Plant after electric dust removal, and 42.5 from Jidong Cement Plant in Jilin City Grade ordinary Portland cement, chemical analysis pure gypsum powder (CaSO 4 ·2H 2 O) and caustic soda (NaOH).

[0030] According to the raw material ratio determined by the experiment, weigh 5kg of zeolite powder with a fineness of 80 mesh, 2kg of national standard I grade fly ash, 0.3kg of NaOH in the fixative, and optical analysis of pure gypsum powder CaSO 4 ·2H 2 O0.6kg, 42.5 grade cement 2.1kg, water about 3kg~5kg, (that is, the amount of water used accounts for 23% to 33% of the total material, including the water for dissolving alkali and the amount of water needed for wet...

Embodiment 1、2、3

[0031] Examples 1, 2, 3; Preparation of composite filler for zeolite and fly ash wastewater treatment of the present invention.

[0032] Except for the ratio of raw materials, see Table 1 below, the rest of the preparation process, steps and other process conditions are the same as those in Example 1.

[0033] Table 1. The ratio of raw materials in Examples 1 to 3 (unit: kg)

[0034] example 1

Embodiment 4

[0035] Example 4: Packing of composite fillers for zeolite and fly ash wastewater treatment of the present invention (the following 4 kinds of fillers are simultaneously packed in the same organic glass column).

[0036] Biological aerated filter is composed of filter tank body, filter material, supporting layer, water distribution system, air distribution system, backwash system, water outlet system, pipeline and automatic control system. According to the different filtering methods of wastewater in the operation of the filter, the biological aerated filter can be divided into an upward flow filter and a downward flow filter. Except for the different flow directions of wastewater in the filter, the pool structure and working principle of the upflow filter and the downflow filter are basically the same. The zeolite and fly ash wastewater treatment composite filler of the present invention, activated carbon from Tianjin Activated Carbon Factory, natural zeolite from Jiutai Zeolite ...

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Abstract

The invention relates to a wastewater treatment composite filler containing zeolite and pulverized fuel ash, which is prepared by non-sintered technique and has the main raw materials of the zeolite and the pulverized fuel ash. The filler is used for treating organic matter, ammonia nitrogen and nitrate nitrogen in the wastewater, and has excellent performance and easily obtained raw materials with low price; the preparation technique of the filler is simple and free from pollution. Zeolite powder with the fineness of 80 meshes and the pulverized fuel ash reaching national first-grade standard are utilized for preparing porous spherical ceramsite type composite filler by a pelletizer, so that the composite filler has high ammonia nitrogen removing rate and better strength and can well meet the requirements of water quality advanced treatment. The preparation technique is simple and free from pollution and opens up a new approach for the utilization of the zeolite and the pulverized fuel ash, thus having the advantages of energy conservation and emission reduction as well as good environmental and economical benefits since the pulverized fuel ash discharged from a thermal power plant can be recycled.

Description

Technical field [0001] The invention is a composite filler applied to the denitrification and carbon removal of wastewater treatment, and is mainly a non-sintered porous spherical zeolite ceramsite type composite filler composed of zeolite, fly ash and a curing agent. Specifically, it relates to a composite filler for zeolite and fly ash wastewater treatment. technical background [0002] Biomembrane wastewater treatment technology is to oxidize the organic matter, ammonia nitrogen and denitrifying nitrate nitrogen in wastewater through biological contact, and it is the main method of wastewater treatment today. Fillers that provide carriers for microorganisms are a key component of biofilm wastewater treatment. Wastewater treatment fillers have a variety of compositions and forms, mainly divided into soft fillers, semi-soft fillers and hard fillers. [0003] Soft fillers are easy to entangle and will reduce the efficiency of wastewater treatment after a period of use; although s...

Claims

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Application Information

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IPC IPC(8): C04B28/14C02F3/34C02F3/30C02F3/10C04B18/08C04B14/04
CPCC04B2111/00017C04B18/027Y02W30/91C04B7/02C04B14/047C04B18/08C04B20/0076C04B22/062C04B22/143
Inventor 刘景明陈立颖星成萍
Owner NORTHEAST DIANLI UNIVERSITY
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