SLUDGE CHARACTERISTICS AND DISPOSAL ALTERNATIVES …

different in composition. They differ between and recycled mills; however, there is also significant variation within the same categories (Table III). For example, Table III shows that two deinking mill sludges have different ash values. The high-ash sludge has only 60% of the heating value of the low-ash sludge.

Chapter 1 - Fly Ash - An Engineering Material - Fly Ash ...

Chemical composition of fly ash relates directly to the mineral chemistry of the parent coal and any additional fuels or additives used in the combustion or post-combustion processes. The pollution control technology that is used can also affect the chemical composition of the fly ash. Electric generating stations burn large volumes of coal ...

Compaction characteristics of banting soft soil subgrade ...

stabilized by using waste paper sludge ash (WPSA). The soft soil sample was collected from Banting Selangor, Malaysia named as Banting soft soil and classified as slightly sandy Clay with intermediate plasticity. Additive of WPSA is a finely waste product produced from the incinerated waste paper. In ASTM C618, this WPSA samples

Journal of Wood Chemistry and Technology - Taylor & Francis

Results showed that the variation in composite properties according to sludge type could be explained by the chemical composition, regardless of pulping process or SS:PS ratio. Ash and cellulose content were the dominant factors in explaining the composite mechanical properties, and nitrogen content, although low, was the dominant factor in ...

Use of waste paper sludge ash as a calcium-based ...

Use of waste paper sludge ash as a calcium-based stabiliser for clay soils. Mavroulidou M(1). Author information: (1)London South Bank University, London, UK. Chemical ground improvement of soils of poor quality for construction has been increasingly used as a means of promoting sustainable construction practices.

Ash (analytical chemistry) - Wikipedia

The residues after a sample is completely burnt - in contrast to the ash remaining after incomplete combustion - consist mostly of metal oxides.Ash is one of the components in the proximate analysis of biological materials, consisting mainly of salty, inorganic constituents. It includes metal salts which are important for processes requiring ions such as Na + (Sodium), K + (Potassium), and Ca ...

Hazards from landspreading wastes - gov.uk

The chemical composition of the sludge can vary, being influenced by the operations and processes at the particular paper mill. In most cases, paper sludge is co-combusted with other material such as wood, rejects and other sludges. To minimise dust release, PSA is often transferred to silos for closed discharge to tankers andor water is added ...

Properties of Waste Paper Sludge Ash (WPSA) as cement ...

Abstract: Waste Paper Sludge Ash (WPSA) is a waste material collected from the Paper Industry. WPSA is used as cement replacement in producing mortar and was investigated on its chemical, physical and mechanical properties. Construction material with natural resources now become limited and causes of air pollution and environmental problems.

Effect of Alkaline Activators Concentration to the ...

Waste paper sludge ash (WPSA) is a byproduct that has potential to replace Ordinary Portland Cement (OPC) as a building material. The purpose of this study is to investigate the effect of NaOH concentration on the strength of Waste Paper Sludge Ash (WPSA)-based geopolymer mortar. Initially, the WPSA samples were been analyzed using X-ray Fluorescence (XRF) to determine the chemical composition.

Paper Mill Sludge as Fiber Additive for Asphalt Road …

2003). In this study, chemical composition other than ash content was analyzed for better comparison among the sludge samples and wastepaper. The major organic component of sludge …

APPLICATION OF PAPER SLUDGE ASH IN CONSTRUCTION …

compounds .Paper sludge ash is produced by incinerating waste paper sludge from the paper manufacturing process. Mochizuki et al.,(2003) studied its pH ranges widely from a nearly neutral level to around 12 depending on its composition and the particle density is around 2.2 to 2.9(g/cm3), the maximum dry density is 0.65 to 0.95(g/cm3 ...

Study on Partial Replacement of Cement with Waste Paper ...

summarize the behaviour of concrete with the waste paper sludge ash by replacement of cement in the range of 5%,10% and 15% which may help to reduce the disposal problem of sludge and enhance the properties of M25 concrete. As wastepaper sludge ash contains higher percentage of silicon dioxide SiO2, it may provide extra strength to concrete.

Physical and Chemical Characterization of Pond Ash

ash and pond ash. Pond ash is a mixture of dry fly ash and bottom ash. During the years 2010-12, about 408 Million tonnes/year of coal was used and over 130 Million tonnes/year of fly ash was generated by 88 thermal power plants all over India. Pond ash contributes to two major environmental problems: generation of respirable particulate matter (a

Pulp Extrusions Incorporating Sludge From The Pulp and ...

PULP EXTRUSIONS INCORPORATING SLUDGE FROM THE PULP AND PAPER INDUSTRY ... wastepaper, and papermill residues into solid sheets and profiles. We have previously shown that ... solids and ash content, chemical composition, and fiber length distribution) would be much more difficult than we had anticipated.

Waste Paper Mill Sludge - The National Academies Press

Limited research showed it reduced density but also reduced compressive strength. It was suggested that the usefulness could be improved with chemical bonding to form chapter three Waste PaPer MiLL sLudge 47 TABLE 59 DISPOSAL OF WASTE PAPER SLUDGE ByPRODUCTS After …

MICROBIOLOGICAL AND PHYSICO-CHEMICAL …

Microbiological and physico-chemical composition of sewage sludge derived from the food industry 93 Fig. 2. The total number of microorganisms including yeast and fungi [lg CFU/g d.m.] in sewage sludge with and without lime Fig. 3. The composition of mesophilic bacteria population [%] in the limed sediment without and with the addition of lime

Recovery and Recycling of Paper - ICE Virtual Library

Jul 07, 2015· The resultant ash (~ 700 tonnes/week) is currently dumped to landfill. The kaolinite content of wastepaper sludge can vary in the range 15-75% and the calcite content from 2170% [2]. The composition is a function of the type, grade and quality of the paper being recycled. The phase composition of the ash will be dependent on its thermal history.

Fly Ash Characteristics from Waste-to-Energy-Facilities ...

Fly ash normally comprises only a small proportion of the total volume of residue from a WTE facility; the quantity ranges from 5 to 20 percent of the total ash. Distribution of bottom and fly ash is largely influenced by the type of combustion unit. Excess air systems produce the most fly ash; controlled air units produce the smallest amounts.

Mineralogical Composition Evolution and Thermogravimetric ...

The characterization and comparison of sludge ashes at various ashing temperatures were carried out to study the relationship between the ashing fusibility, physicochemical properties, and thermogravimetric characteristics. The low temperature ashes were black gray and had the characteristic of the coexistence of irregular and rounded particles, which contained a certain proportion of residual ...

Reaction products and strength development of wastepaper ...

The ashes generated in this process, often referred to as wastepaper sludge ash (WSA), differ widely in their chemical and mineralogical composition, depending on the composition of the feedstock, the production and waste treatment processes and the conditions of combustion, . Despite the volume reduction by incineration, the amount of waste ...

Recycling and Reuse of Waste Materials - ICE Virtual Library

Keywords: Wastepaper, Sludge, Ash, Concrete block, Strength, Particle size, Aggregate Mr G Veerappan is a Final year PhD research student/Research Assistant, currently researching 'The development of low-cost, low energy cement from waste' at Building Materials Research Unit (BMRU), School of Technology (SoTECH), University of Glamorgan (UoG ...

SEWAGE SLUDGE: CHARACTERISTICS AND RECOVERY …

Sewage sludge ash (ISSA) Characteristics The output of sewage sludge incineration process is Incinerated Sewage Sludge Ash (ISSA), which characteristics are slightly different from the ones seen for sewage sludge. Cyr et al [3] provide mean values for ISSA chemical analysis as found in literature (Figure 12 and Figure 13).

EXPERIMENTAL STUDY ON THE STRENGTH PROPERTIES OF …

ash lump) made with a mixture of paper sludge ash and cement is presented and the compressive strength and the bending strength are examined. As a result, there appeared a possibility to utilize the material as a substitute for concrete. Keywords: industrial waste, paper sludge ash, materials for construction, slab, mechanical properties 1 ...

Portland cement paper sludge - SmartSite

Portland cement. Paper sludge is currently in use as an alternative fuel. It is classified as Class 2 (liquid alternative fuels) in the Cembureau classification of alternative fuels (5). Paper sludge ash After incinerating paper sludge at approximately 800 °C, the resultant fly ash may contain reactive

Gasification of Densified Sludge and Wastepaper in a ...

The co-disposal of densified sludge and wastepaper in a co-current flow packed bed gasifier represents new application of the thermal gasification process. ... The gasification of densified sludge and wastewater, a detailed description of a ... the composition of fuel ash, and the percentage

Waste Paper Sludge Ash (WPSA) as Binder in Solidifying ...

Jun 19, 2016· Sludge treatment Water Treatment Plant Sludge (WTPS) Ordinary Portland Cement (OPC) Waste material Waste Paper Sludge Ash (WPSA) Blended binder Compressive strength Solidification This is a preview of subscription content, log in to check access.

Soil solution chemistry of sewage-sludge incinerator ash ...

The chemical composition of the soil solution provides useful information on the feasibility of amending agricultural land with municipal and industrial waste, because the soil solution is the medium for most soil chemical reactions, the mobile phase in soils, and the medium for mineral absorption by plant roots.

APPLICATION OF PAPER SLUDGE ASH IN CONSTRUCTION …

Chemical composition of paper sludge ash. adopted from Segui et al., 2012 2.3 Mineralogical composition Editing (1985) Paper sludge contains very small quantities of minerals, such as kaolinite ...