THE EFFECT OF ADDING SLAG, ACHIEVED FROM WASTEWATER SLUDGE INCINERATION IN FLUIDIZED-BED FURNACE, ON THE QUALITY OF CONCRETE

The Effect of Adding Slag, Achieved from Wastewater Sludge Incineration in Fluidized-Bed Furnace, on the Quality of Concrete

Quality Production Improvement - QPI ◽

10.2478/cqpi-2019-0033 ◽

2019 ◽

Vol 1 (1) ◽

pp. 244-250

Author(s):

Alina Pietrzak

Keyword(s):

Compressive Strength ◽

Frost Resistance ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Wastewater Sludge ◽

Hardened Concrete ◽

Sludge Incineration ◽

Concrete Mix ◽

Compressive Strength Of Concrete

Abstract Due to a constant increase in generating the amount of sewage waste it is necessary to find an alternative method of its use or disposal. One of such methods can be utilization of sewage sludge in construction materials industry, particularly in concrete technology and other materials based on cement. It allows using waste materials as a passive additive (filler) or also as an active additive (replacement of part of bonding material). The article aims at presenting the analysis of the effect of adding slag, achieved from wastewater sludge incineration in sewage treatment plant, on properties and quality of concrete mix and hardened concrete. Using an experimental method, the researcher designed the composition of the control concrete mix, which was then modified by means of slag. For all concrete mixtures determined – air content with the use of pressure method and consistency measured by the use of concrete slump test. For all concrete series the following tests were conducted: compressive strength of concrete after 7, 28 and 56 days of maturing, frost resistance for 100 cycles of freezing and thawing, water absorption. The use of slag, ground once in the disintegrator, causes a decrease of in compressive strength of concrete samples in relation to the control concrete series as well as bigger decrease in compressive strength after frost resistance test.

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The Analysis of Influence of the Gangue in the Coal as Fired on the Coal Conveying System and the Boiler Operation of the Circulating Fluidized Bed Unit

E3S Web of Conferences ◽

10.1051/e3sconf/201911802011 ◽

2019 ◽

Vol 118 ◽

pp. 02011

Author(s):

Su Pan ◽

Yu Pengfeng ◽

Linbo Liu ◽

Han Jing ◽

Xiao Shen

Keyword(s):

Fluidized Bed ◽

Circulating Fluidized Bed ◽

Storage Conditions ◽

Coal Gangue ◽

Quality Data ◽

Stable Operation ◽

Coal Quality ◽

Boiler Operation ◽

Conveying System

The coal as fired, with unidentified characteristics of the coal gangue, was burned on a 300MW circulating fluidized bed unit. The equipment of the coal conveying system was damaged and the boiler operation was unstable. In response to the problems, the coal quality data and storage conditions of the coal were examined and the site was spot-checked to evaluate the coal quality characteristics. At the same time, the typical representative parameters of the coal handling system and boiler operation were selected. According to the analysis of coal quality and coal storage, the coal quality fluctuates greatly and the uniformity of particle size distribution is poor. There is actually the coal gangue with hard texture and hard to grind in the coal pile. The coal gangue will have adverse effects on the fine screening machine, fine crusher and other equipment. After burned this type of coal, the fluidized quality of the boiler bed is degraded to make an impact on the safe and stable operation of the boiler. It is recommended that the coal should be screened and then burned into the furnace to ensure safe and stable operation of the boiler.

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Fluid-dynamic behavior of flaxseed fluidized and spouted bed

Ciência Rural ◽

10.1590/0103-8478cr20160644 ◽

2017 ◽

Vol 47 (10) ◽

Author(s):

Elza Brandão Santana ◽

Maria da Conceição da Costa Valente ◽

Lorena Gomes Corumbá ◽

Elisangela Lima Andrade ◽

Cristiane Maria Leal Costa ◽

...

Keyword(s):

Fluidized Bed ◽

Dynamic Behavior ◽

Seed Treatment ◽

Fluid Dynamic ◽

Seed Processing ◽

Linum Usitatissimum L ◽

Air Temperatures ◽

Physiological Properties ◽

Physiological Quality

ABSTRACT: Processing of particles in a moving bed, such as a fluidized bed or a spouting bed, is commonly used in the operations of drying, coating, and granulation of particulate systems. This process has applications in the chemical, pharmaceutical and, presently, agronomical industries, especially for seed treatment/coating. This research aimed to analyze the fluid-dynamic behavior of fluidized and spouting beds with different air temperatures and loads of flaxseeds (Linum usitatissimum L.), with estimates of the fluid-dynamic parameters correlated to each process. The parameters were compared with the values obtained from classical correlations in the literature, with indications of associated percentages of deviation. Influence of fluid dynamics on the physiological quality of seeds was assessed by germination tests and the germination speed index. An analysis of the results indicated that seed processing was adequate for processing in dynamically active beds; however, temperatures above 50ºC in both beds caused significant reductions in the physiological quality of the seeds. Processing in a fluidized bed presented a smaller reduction of the physiological properties of the flaxseed.

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KARAKTERISTIK FISIKOKIMIA PATI SAGU HASIL PENGERINGAN SECARA FLUIDISASI MENGGUNAKAN ALAT PENGERING CROSS FLOW FLUIDIZED BED BERTENAGA SURYA DAN BIOMASSA

REAKTOR ◽

10.14710/reaktor.13.3.155-164 ◽

2011 ◽

Vol 13 (3) ◽

pp. 155 ◽

Cited By ~ 6

Author(s):

Abadi Jading ◽

Eduard Tethool ◽

Paulus Payung ◽

Sarman Gultom

Keyword(s):

Chemical Composition ◽

Fluidized Bed ◽

Cross Flow ◽

Physicochemical Characteristics ◽

Sago Starch ◽

Drying Time ◽

Fluidized Bed Dryer ◽

Conventional Drying ◽

Fluidized Bed Drying

PHYSICOCHEMICAL CHARACTERISTICS OF SAGO STARCH OBTAINED FROM FLUIDIZED BED DRYING USING SOLAR AND BIOMASS POWERED CROSS FLOW FLUIDIZED BED DRYER. The research aim is to study the comparative quality of sago starch drying results using cross flow fluidized bed dryer powered by solar and biomass in conventional drying, particularly the chemical composition and physicochemical characteristics. This research was conducted through a drying phase of wet sago starch using a cross flow fluidized bed dryer, and drying in conventional as well as dried sago starch quality testing results are drying. The results of this study indicate that dry sago starch which has been drained by means of cross flow fluidized bed dryer has a chemical composition that does not vary much with starch which is dried by conventional drying, so that the dried sago starch produced by the dryer is very good. On the other hand the use of dryers is the more correct because the physicochemical properties of sago starch using a low drying temperature and drying time is short. Tujuan penelitian ini adalah mempelajari perbandingan kualitas pati sagu hasil pengeringan menggunakan alat pengering cross flow fluidized bed bertenaga surya dan biomassa dengan pengeringan secara konvensional, khususnya komposisi kimia dan karakteristik fisikokimia. Penelitian ini dilakukan melalui beberapa tahapan yaitu pengeringan pati sagu basah menggunakan alat pengering cross flow fluidized bed, pengeringan secara konvensional serta pengujian kualitas pati sagu kering hasil pengeringan. Hasil dari penelitian ini menunjukkan bahwa pati sagu kering yang telah dikeringkan dengan alat pengering cross flow fluidized bed memiliki komposisi kimia yang tidak berbeda jauh dengan pati yang dikeringkan dengan cara pengeringan secara konvensional, sehingga pati sagu kering yang dihasilkan oleh alat pengering tersebut sangat baik. Di sisi lain penggunaan alat pengering ini semakin memperbaiki sifat fisikokimia pati sagu sebab menggunakan suhu pengeringan yang rendah dan waktu pengeringan yang singkat. Kata Kunci: pengering unggun terfluidakan; fisikokimia; pati sagu

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The effect of fluidized bed combustion residue on the composition and nutritional quality of food crops for hamsters and rats

Qualitas Plantarum ◽

10.1007/bf01091781 ◽

1985 ◽

Vol 35 (4) ◽

pp. 359-374 ◽

Cited By ~ 2

Author(s):

E. F. Fashandi ◽

R. L. Reid ◽

W. L. Stout ◽

J. L. Hern ◽

O. L. Bennett

Keyword(s):

Fluidized Bed ◽

Nutritional Quality ◽

Food Crops ◽

Fluidized Bed Combustion ◽

Quality Of Food ◽

Combustion Residue

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Enhanced hydrogen production in co-gasification of sewage sludge and industrial wastewater sludge by a pilot-scale fluidized bed gasifier

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2020.10.081 ◽

2020 ◽

Author(s):

You-Hsin Chen ◽

Thi Ngoc Lan Thao Ngo ◽

Kung-Yuh Chiang

Keyword(s):

Sewage Sludge ◽

Hydrogen Production ◽

Fluidized Bed ◽

Industrial Wastewater ◽

Pilot Scale ◽

Wastewater Sludge ◽

Fluidized Bed Gasifier

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Desulfurization using limestone during sludge incineration in a fluidized bed furnace: Increased risk of particulate matter and heavy metal emissions

Fuel ◽

10.1016/j.fuel.2020.117614 ◽

2020 ◽

Vol 273 ◽

pp. 117614 ◽

Cited By ~ 2

Author(s):

Jianrui Zha ◽

Yaji Huang ◽

Peter T. Clough ◽

Lu Dong ◽

Ligang Xu ◽

...

Keyword(s):

Heavy Metal ◽

Particulate Matter ◽

Fluidized Bed ◽

Sludge Incineration ◽

Increased Risk ◽

Heavy Metal Emissions

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Utilization of sewage sludge ashes in the brick and tile industry

Water Science & Technology ◽

10.2166/wst.1997.0418 ◽

1997 ◽

Vol 36 (11) ◽

pp. 251-258 ◽

Cited By ~ 26

Author(s):

Bernd Wiebusch ◽

Carl Franz Seyfried

Keyword(s):

Heavy Metals ◽

Wastewater Treatment ◽

Chemical Composition ◽

Sewage Sludge ◽

Treatment Methods ◽

Sludge Incineration ◽

Brick And Tile ◽

The Impact

Several aspects of using ashes from sewage sludge incineration in the brick and tile industry have been examined. After discussing the item of ash production in Germany, the impact of different wastewater treatment methods is described; for instance, the use of precipitation agents containing iron will considerably influence the ash quality. Depending on their respective chemical composition, different ashes have different effects on the ceramic qualities of the bricks made of clay blended with ashes. These effects will be shown in regard to the major ceramic parameters. Similarly, the quality of the ashes also influences the elution behaviour and the mineral fixation of heavy metals.

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