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Preparation method of modified pumice packing for purifying sewage

A sewage purification and modification technology, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of low TP removal rate and low total nitrogen removal rate, and reach the source Rich, good treatment effect, good purification effect

Inactive Publication Date: 2011-10-05
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The previous research on the general performance of the biological aerated filter with ceramsite as filler for sewage treatment showed that the biological filter technology has a significant impact on the COD and NH in the sewage water quality components. 4 + , turbidity, SS, etc. have good treatment effects, and the removal rates can reach 88.4%, 93.7%, 91.6% and 94.2% respectively, but the removal rate of total nitrogen (TN) is not high (only 54.5% on average)
Further selection of pulverized natural pumice as filler, tests show that although pulverized pumice is a relatively good filler for biological aerated filter, it does not have much difference in improvement of COD, SS and turbidity compared with ceramsite, and The removal rate of TP is very low

Method used

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  • Preparation method of modified pumice packing for purifying sewage
  • Preparation method of modified pumice packing for purifying sewage
  • Preparation method of modified pumice packing for purifying sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Select pumice, crush, sieve, and grind to obtain irregular particles (Φ=5-50 mm); then use imidazole-type ionic liquid-1-butyl-3-methylimidazole Chlorinated salt ([Bmin]Cl) soaking modification treatment at room temperature (final concentration of lanthanide rare earth elements is 0.05 mol / L, final concentration of ionic liquid is 0.01 mol / L, soaking time is 6 h.), drained to obtain the finished product .

Embodiment 2

[0015] Select pumice, crush, sieve, and grind to obtain irregular particles (Φ=10-100 mm); then use pyridine-type ionic liquid-N-ethylpyridine bromide (N - ethylpyridinium bromide) soaked at room temperature for modification (the final concentration of lanthanide rare earth elements is 0.1 mol / L, the final concentration of ionic liquid is 0.005 mol / L, and the soaking time is 12 h.), drained to obtain the finished product.

Embodiment 3

[0017] Select pumice, crush, sieve, and grind to obtain irregular particles (Φ=5-100 mm); then use piperidine imidazole type ionic liquid-bromide N-methyl, ethyl N-ethyl-methyl pipe was soaked and modified at room temperature (the final concentration of lanthanide rare earth elements was 0.001 mol / L, the final concentration of ionic liquid was 0.001 mol / L, and the soaking time was 24 h.), drained, Get the finished product.

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Abstract

The invention discloses a preparation method of a modified pumice packing for purifying sewage, which belongs to a preparation method of a packing related to sewage treatment in the field of environment friendliness. The method comprises the following steps of: crushing and screening pumice serving as a raw material; grinding and processing to obtain irregular granules; processing to obtain granules of required sizes; performing soaking modification treatment by using ionic liquid containing low-concentration lanthanum series rare-earth elements at normal temperature for 4 to 24 hours; and draining to obtain finished products. The packing has low-cost materials, a simple processing process and a good using effect. The preparation method can be widely applied to trickling-filtering beds, anaerobic biofilters, filters, biological fluidized beds, aerated biological filters, high-load biofilters, tower type biofilters, active biofilters, wetlands and the like.

Description

technical field [0001] The invention relates to a filler related to sewage treatment in the field of environmental protection and a preparation method thereof, in particular to a modified pumice filler used for sewage purification and a preparation method thereof. Background technique [0002] my country is a country that is relatively short of water resources. With the development of economy and the acceleration of urbanization, the problem of urban water shortage is becoming more and more serious, and the massive discharge of urban sewage has aggravated this trend. Sewage treatment is one of the important technical measures to prevent and control water environment pollution. The level of sewage treatment technology will directly affect the quality of water environment in a region. Biofilter and fluidized bed technology are new biological treatment technologies suitable for small and medium-sized point source sewage treatment and reuse; they use granular packing as the biof...

Claims

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Application Information

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IPC IPC(8): C02F3/10
CPCY02W10/10
Inventor 杜道林司春灿戴志聪徐灿灿孙先超洪霞薛永来肖翔林英
Owner JIANGSU UNIV
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