Waste Sawdust Research Articles

THE USE OF SAWDUST WASTE ON PHYSICAL PROPERTIES AND THERMAL CONDUCTIVITY OF FIRED CLAY BRICK PRODUCTION

In this paper, the effects of incorporation of sawdust waste on the properties of fired claybricks were investigated. Clay bricks fabricated with 0%, 2.5%, 5%, 7.5%, and 10% by weight of sawdustwaste were tested. The clay brick specimens were firing at 900 °C, 1000 °C, and 1100 °C for study the waterabsorption, bulk density, apparent porosity, compressive strength, and thermal conductivity of the fired claybricks. The experimental results found that the using of sawdust waste reduced the bulk density andcompressive strength of the specimens. It was observed their apparent porosity ratios up to 30% improvedwith increasing of sawdust waste up to 10% by weight after firing at 900 °C. The compressive strength ofbricks specimen with 2.5% by weight of sawdust waste addition and fired at 1100 °C showed a higher than ofvalue strength as required by ASTM C62-13a. In addition, the thermal conductivity of the porous fired claybricks specimens with 2.5-10% by weight sawdust waste addition produced at 1000 °C compared to the firedclay brick specimens without additive, decreased from 0.47 to 0.22 W/mK. The results thus showed thatsawdust waste was a potential material for use as a pore former additive to raw clay-brick production.

Phosphoric Acid Activated Carbon from Melia azedarach Waste Sawdust for Adsorptive Removal of Reactive Orange 16: Equilibrium Modelling and Thermodynamic Analysis.

Waste wood biomass as precursor for manufacturing activated carbon (AC) can provide a solution to ever increasing global water quality concerns. In our current work, Melia azedarach derived phosphoric acid-treated AC (MA-AC400) was manufactured at a laboratory scale. This novel MA-AC400 was tested for RO16 dye removal performance as a function of contact time, adsorbent dosage, pH, temperature and initial dye concentration in a batch scale arrangement. MA-AC400 was characterized via scanning electron microscopy, energy dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, dynamic light scattering (DLS) and fluorescence spectroscopy. MA-AC400 is characterized as mesoporous with BET surface area of 293.13 m2 g−1 and average pore width of 20.33 Å. pHPZC and Boehm titration confirm the acidic surface charges with dominance of phenolic functional groups. The average DLS particle size of MA-AC400 was found in the narrow range of 0.12 to 0.30 µm and this polydispersity was confirmed with multiple excitation fluorescence wavelengths. MA-AC400 showed equilibrium adsorption efficiency of 97.8% for RO16 dye at its initial concentration of 30 mg L−1 and adsorbent dose of 1 g L−1. Thermodynamic study endorsed the spontaneous, favorable, irreversible and exothermic process for RO16 adsorption onto MA-AC400. Equilibrium adsorption data was better explained by Langmuir with high goodness of fit (R2, 0.9964) and this fitness was endorsed with lower error functions. The kinetics data was found well fitted to pseudo-second order (PSO), and intra-particle diffusion kinetic models. Increasing diffusion constant values confirm the intraparticle diffusion at higher RO16 initial concentration and reverse was true for PSO chemisorption kinetics. MA-AC400 exhibited low desorption with studied eluents and its cost was calculated to be $8.36/kg.

Experimental research on an innovative sawdust biomass-based insulation material for buildings

Sawdust wastes, having high production in China, can be utilized as raw materials of insulation materials to increase their application value and save resources, while the geopolymer will be a good adhesive because of its unique characteristics and low CO2 emissions during the production process. Therefore, a novel biomass-based composite material, which can be used for building insulation, was fabricated with geopolymers as adhesives and sawdust wastes as aggregates. In addition, the influence of three main variables was studied to determine the material’s optimal proportion by testing its thermal and mechanical properties, water resistance and microstructure. The three variables were wetting water to biomass mass ratio (WW/B ratio), H2O2 to adhesive mass ratio (H/A ratio) and biomass to adhesive mass ratio (B/A ratio), respectively. The results indicated that the composite materials with the WW/B ratios of 1–2, H/A ratios of 0.012–0.015, and B/A ratio of 0.12 were the optimum ones with heat conductivity of 0.112–0.125 W/(m·K) and compression strength of 0.76–1.71 MPa. This new biomass-based insulation material with good physical performances can contribute to building energy conservation, cleaner production, and sustainable development.

Stabilization process and potential of agro-industrial waste on Pb-Contaminated soil around Pb–Zn mining

Sawdust wastes were used as precursors to prepare adsorbents by combustion and pyrolysis for experimental and mechanism studies and determine the potential of biomass extracted from agro-industrial residues for Pb-polluted soil remediation. Pot experiments were conducted on contaminated soils near Pb–Zn mining with sawdust ash (SA) and sawdust biochar (SB) in different proportions and dosage ratios. Studies have indicated that the application of biomass materials can enhance the adsorption, complexation and precipitation of Pb cations in soil and reduce the mobility of Pb. The concentrations of SPLP-Pb and DTPA-extractable Pb in amended soils were the lowest under 1% 1:2 and 5% 1:1 treatment, respectively. Results of fraction extraction and XANES analysis showed that the materials change the main forms of Pb in soil. Moreover, the binding behavior of Pb with organic matter increases the proportion of Pb (Ac)2, leading to the transformation of high toxicity Pb-compounds into precipitates and complexes. The remediation methods of 2% 1:2 and 5% 1:2 were better than those of other methods in stabilizing Pb in soil. This study indicated that heat-treated sawdust can be used for Pb-polluted soil remediation, which is a type of environmental remediation measure with considerable ecological potential.

Hybrid silicate-hydrochar composite for highly efficient removal of heavy metal and antibiotics: Coadsorption and mechanism

A novel cost-effective hydrochar composite (MgSi-HC) prepared by a simple one-step process using waste sawdust, inexpensive silicate and magnesium salts as raw materials was used to remove Cu(II), Zn(II), and tetracycline (TC) from aqueous solution. The novel hydrochar material was characterized by SEM, TEM, XRD, BET specific surface area, ATR-FTIR spectra, and X-ray photoelectron spectroscopy. The values of surface area (107.7 m2/g) and pore volume (0.489 cc/g) of MgSi-HC indicated that it had a large specific surface area and well-developed pore structure. Adsorption isotherm showed that the maximum adsorption capacity of MgSi-HC for Cu(II), Zn(II), and TC was 214.7 mg/g, 227.3 mg/g, and 361.7 mg/g, respectively. In addition, the effects of heavy metals and tetracycline on each other in binary adsorption systems were different. Meanwhile, the study of mechanism indicated that various interactions might be involved in the adsorption process, and the adsorption mechanisms of heavy metal and TC were different. The potential of MgSi-HC for practical environmental remediation was evaluated, the result demonstrated that MgSi-HC still had high performance after 5 adsorption-desorption cycles, and it had stable adsorption ability in different water samples (150.2–156.2 mg/g for Cu, 159.6–167.4 mg/g for Zn, and 183.9–189.8 mg/g for TC), implying that the novel hydrochar could be a promising adsorbent for removal of heavy metal and antibiotics from real wastewater. This work provided a reference on the coadsorption of heavy metal and antibiotics, and indicated the potential application of MgSi-HC in complex pollutant adsorption.

Preparation of Sawdust-Filled Recycled-PET Composites via Solid-State Compounding

Recently, consumer markets have shown great interest in sustainable products. Considerable research efforts are headed towards developing biodegradable and recyclable polymers and composites. In this study, the fabrication of a wood–plastic composite (WPC) via solid state compounding has been examined. Polyethylene terephthalate (PET) and wood sawdust waste as major components of waste and challenging materials for the manufacturing of WPCs have been explored. Furthermore, the addition of poly(ε-caprolactone) as a biodegradable plasticizing agent was investigated. Composite powders were prepared by cryogenic solid-state milling (cryomilling) according to a statistical mixture design. Mechanical and water absorption properties were inspected on film samples obtained by hot pressing. Different formulations resulted in a variety of colors, textures, water interactions and mechanical properties. A sawdust content of approximately 25 vol.% was optimal for the best combination of properties. The results indicated that cryomilling is technically advantageous in the production of WPCs.

Oxidative amidation by Cu(ii)–guanidine acetic acid immobilized on magnetized sawdust with eggshell as a natural base

Copper(ii)–guanidine acetic acid complex was immobilized on the surface of magnetized raw waste sawdust (SD) as an abundant natural biopolymer and employed as an efficient and recoverable catalyst in oxidative amidation reaction, while waste eggshell (ES) powder was used as a low-cost solid base.

Corrosion resistances of C30 concrete: Effect of finely ground bronze sawdust waste

Corrosion resistances and service life for concrete structures as well as the recycling of wastes are quite important for either economical gain or the reduction of environmental problems. In this study, finely ground CuAl10Ni bronze sawdust waste (1, 3 and 5% by weight) was incorporated into C30 concrete in order to improve the corrosion resistance, and density, open porosity (%) and corrosion resistances were determined. Additionally, SEM/EDX analyses were performed in order to analyze the microstructures of concretes before and after corrosion test. It was observed that concretes including bronze sawdust generally showed higher corrosion resistances than that of pure concrete due to high corrosion-acid-seawater resistances of bronze addition.

Enzymatic Hydrolysis of Two-way Pretreated Sawdust of <i>Eucalyptus globulus</i> and <i>Cupressus lusitanica</i>

Sawdust in Ethiopia, despite of its abundance, is not being properly utilized. Pre-treatment has been found to be crucial step before enzymatic hydrolysis of lignocellulosic resources to obtain sugars from such resources. Various pre-treatment methods have been developed to facilitate these bio-conversion processes. This research was aimed at investigating the effects of the combined pretreatments of steam and mild NaOH with white rot fungi (WRF) on sawdust samples from Eucalyptus globulus and Cupressus lusitanica were investigated. The amounts of losses of lignin, cellulose and hemicellulose contents of the pretreated sawdust samples were measured. Samples of the pretreated sawdust samples were then subjected to the enzymes from the hydrolytic wood rot fungi for hydrolysis into fermentable sugars. It was observed that lignin, cellulose and hemicellulose losses of the two sawdust types increased with the increasing incubation days but lignin and hemicellulose were preferentially degraded than cellulose. Sugar yield obtained from the sawdust pretreated in the combination of NaOH with WRF and steam with WRF was significantly higher compared to the yield obtained from the NaOH and steam alone pretreated sawdust samples. Pretreatment by the combination of NaOH with the wood rot fungi significantly modified the recalcitrance nature of the sawdust samples than when steam combined with the fungi. Similarly, with increasing enzymatic hydrolysis periods, sugar yields significantly increased. Higher sugar yields were obtained from sawdust samples of E. globulus than C. lusitanica. The ligninolytic and cellulolytic fungi tested resulted in a notable sugar yields indicating the possible application of the wood rot fungi in sugar production from lignocellulosic sawdust wastes which could be used for different industrial applications.

Utilization of Sawdust Waste Biomass as an Eco-Friendly Biosorbent for Bioremediation of Manganese Pollution in Aqueous Environment

In this study, the sawdust waste biomass was used as an eco-friendly biosorbent material for the bioremediation of manganese pollution in aqueous environment. The effects of various environmental variables such as pH, biosorbent amount, metal concentration and contact time on the manganese biosorption were studied in batch operating conditions. The kinetic and equilibrium studies were performed to elucidate the biosorption behavior of biosorbent material. The biosorption capacity of biosorbent was strongly influenced by the operating parameters. The experimental data were more successfully modeled by the pseudo-second-order kinetic model and Langmuir isotherm model compared to other models applied in the study. The maximum manganese removal capacity of biosorbent was found to be 25.655 mg g-1. These findings showed that the sawdust waste biomass can be used as an eco-friendly biosorbent material for the bioremediation of manganese pollution in aqueous environment.

Extraction and Characterization of Cellulose from Yellow Meranti (Shore macrobalanos) Sawdust Waste

Meranti (Shorea macrobalanos) is a typical wood from Kalimantan that is still valued as a raw material of furniture production. According to statistical data, meranti sawdust waste reached 44% and has not been widely used. It is known that meranti has a high lignocellulose content, which are 38.18% of lignin, 26.03% of hemicellulose and 40.33% of cellulose. Due to the high cellulose level, meranti becomes an alternative source of cellulose which can be applied in composites, biomaterials, and membranes. Therefore, this study aims to produce cellulose from yellow meranti sawdust waste using an alkali treatment, NaOH 17.5%, with a variation of extract time of 20, 40, and 60 minutes. Cellulose characterization was performed using the Chesson-Datta method, Fourier-transferred Infrared Spectroscopy (FTIR), and Scanning Electron Microscope (SEM). The Chesson-Datta test showed that cellulose concentration escalated by increasing process time, which is 45%, 47% and 53% at 20, 40, and 60 minutes respectively. Increased levels of cellulose were followed by decreasing concentrations of lignin and hemicellulose. The FTIR results presented a strengthening of the intensity in the C-O-C functional group which indicated an increase in cellulose levels. Meanwhile, a decrease intensity was also revealed in the aromatic C=C and C=O groups, which implied a reduction in the amount of lignin and hemicellulose. Through the SEM, the surfaces were recognizably less dense by increasing extract time. It is because of the degradation of lignin and hemicellulose. Herein, the most optimum yield was achieved in 60 minutes to produce up to 53% of cellulose. Thus, yellow meranti sawdust waste has a high potential source of cellulose. Keywords: yellow meranti, alkali treatment, cellulose Abstrak Meranti ( Shoreamacrobalanos ) merupakan kayu khas Kalimantan yang saat ini masih dimanfaatkan sebagai bahan baku pembuatan furnitur. Menurut data statistik, limbah serbuk kayu meranti yang dihasilkan mencapai 44% dan belum banyak dimanfaatkan. Telah diketahui bahwa meranti memiliki kandungan lignoselulosa yang cukup tinggi, yaitu 38,18% lignin, 26,03% hemiselulosa, dan 40,33% selulosa. Dengan kandungan selulosa yang tinggi, meranti menjadi salah satu alternative sumber selulosa yang kemudian dapat diaplikasikan di bidang komposit, biomaterial, dan membran. Oleh karena itu, penelitian ini bertujuan untuk menghasilkan selulosa dari limbah serbuk meranti kuning dengan menggunakan metode alkalisasi, NaOH 17,5%, dengan variasi waktu ekstrak selama 20, 40, dan 60 menit. Karakterisasi selulosa dilakukan dengan menggunakan uji Chesson-Datta, fourier-transferred infrared (FTIR), dan scanning electron microscope (SEM). Uji Chesson-Datta menunjukkan semakin lama waktu alkalisasi dapat meningkatkan konsentrasi selulosa, yaitu 45%, 47% dan 53% pada waktu alkalisasi 20, 40, dan 60 menit. Peningkatan kadar selulosa diikuti dengan menurunnya konsentrasi lignin dan hemiselulosa. Hasil FTIR menunjukkan penurunan intensitas pada gugus C=O yang mengindikasikan adanya penurunan jumlah lignin dan hemiselulosa seiring dengan meningkatnya waktu. Hasil morfologi SEM juga menunjukkan permukaan yang semakin tidak rapat seiring dengan meningkatnya waktu alkalisasi. Hal ini diakibatkan terjadi degradasi lignin dan hemiselulosa. Pada penelitian ini, hasil paling optimum dicapai pada waktu 60 menit dengan menghasilkan selulosa hingga 53%. Sehingga, limbah serbuk meranti memiliki potensi sebagai sumber selulosa yang cukup tinggi. Kata kunci: meranti kuning, alkalisasi, selulosa

Production of wood-plastic composites using cedrela odorata sawdust waste and recycled thermoplastics mixture from post-consumer products - A sustainable approach for cleaner production in Cuba

Abstract This research aims to evaluate the application of technological efficiency to industrial waste, in the production of wood plastic composite. The raw materials used were sawdust from Cedrela odorata L., thermoplastic polyethylene terephthalate, high density polyethylene, polypropylene and calcium carbonate. The boards were obtained by extrusion using different proportions of raw material and their physical-mechanical properties were also evaluated. The investigation detected a directly proportional effect between additional proportions of the additive and the physical properties of these boards, except for their density. In contrast, this effect of the proportions of the additive was inversely proportional to the mechanical properties of the board. Statistical analyzes indicate that thermoplastics have an influence greater than 70% on the physical and mechanical properties of the boards mainly when they are used in proportions greater than 50%. The proportions of wood (sawdust) above 50% tend to decrease the resistance of the boards in relation to its physical properties and in turn result in low mechanical resistance. This study formalizes a preventive environmental strategy for recycling industrial waste, which is integrated into the technological process in the production of wood plastic composite, to increase production efficiency, minimize waste and reduce pollution risks to humans and the environment.

Modification of rheological, mechanical, and thermal properties of bitumen by composites of polyethylene grafted maleic and waste sawdust

Currently, different kinds of fiber are used for bitumen modification. Sawdust with long chain molecules is suggested for bitumen modification. To enhance compatibility of fiber and bitumen, the polyethylene grafted maleic with polar and non-polar sectors was used for increasing interactions between bitumen and polar parts of fiber. Mixing the polymer and sawdust with bitumen was carried out in two methods: (a): in separate time, and (b): in composite form. Observations showed that sawdust in present of grafted polymer improved mechanical, thermal, aging, and rheological properties of bitumen. Results were exceptional when sawdust and polymer were added in composite form.

Characterization of products from sawdust biodegradation using selected microbial culture isolated from it

Characterization of products from sawdust degradation using selected microbial culture isolated from it was carried out. A composite sawdust waste sample was collected from MCC timber market in Calabar. The sample was diluted using serial dilution method and inoculated on Nutrient agar and Sabauraud dextrose agar using pour plate technique and incubated at 370C and 270C respectively. Five bacteria species and 3 species of fungi were identified which included Bacillus sp, Serracia mercescens, Micrococcus sp, Pseudomonas aeruginosa, Streptococcus sp, Aspergillus niger, Rhizopus sp and Penicillumsp. The bacteria and fungi species were individually and in combination inoculated into sterile sawdust containing sterile water. These were kept at 270C for 21 days. Protein, glucose contents and chemical components in the degraded sawdust samples were determined using GC-MS chromatography. It was observed that Aspergillus niger degradation had protein content 7.87g/l, Serracia mercescens and Aspergillus niger 6.56g/l, and Serracia mercescens 5.75g/l. These organisms used lignocellulolytic enzymes and similar enzymes in the degradation process. In the case of glucose, the combined degradation produced 2.24g/l, Aspergillus niger 2.05g/l and Serracia mercescens 1.94g/l. It was also observed that sawdust inoculated with Serratia marcescens produced 14 compounds while the combined species of Aspergillus niger and Serratia marcescens produced only 12 compounds. The following compounds Methylene cyclo propane carboxylic acid, Glycine N-Cyclopropylcarbonyl-methyl ester, acetic acid, propanoic acid, benzaldehyde, thiophene, tetrahydro, furfural and propanoic acid 2,2-Dimethyl-2-ethylhexyl ester were detected from the combination of Serratia marcescens and Aspergillus niger though in different concentrations. The percent concentrations of the compounds from Serratia marcescens range from n-Hexadecanoic acid 3.59 to Methylene cyclo propane carboxylic acid with 11.56 while Serratia marcescens and Aspergillus niger range from Butanoic acid, 4-chloro 3.59 to Benzaldehyde with 11.56. Microbial degradation of sawdust produced economically important products and therefore can contribute to the economy of this country at the same time reduce pollution caused by it which is a novel. Key words: Sawdust, biodegradation, bioactive, extracts, microbial culture, lignocellulosic.

Pyrolysis of Cunninghamia lanceolata waste to produce wood vinegar and its effect on the seeds germination and root growth of wheat

As the by-product of biomass pyrolysis, wood vinegar (WV) possesses numerous beneficial properties and has been used in many fields. The properties and utilization of WVs are primarily influenced by the type of biomass feedstock and the production techniques. In this paper, WVs were pyrolyzed from fir sawdust waste at 350 to 650 °C to study their growth regulation effect on wheat seed and to investigate the underlying mechanisms. The highest yield of WV was at 450 °C with major components of phenols (37.92%) and acids (24.59%). The concentration of WVs has a major influence on regulation effect, which mainly affected the development of lateral roots. Compared with sterile water (CK), the WV-2 showed the highest seed germination rate and lateral roots growth, which increased nearly 65% and 92%, respectively. The lower concentration of WVs increased the roots vigor (RV) and promoted growth, while the higher concentration increased the content of malondialdehyde (MDA) and inhibited growth. The increased MDA indicated that wheat roots were suffering from oxidative stress. The findings revealed the suitability of WV as growth regulator in sustainable agriculture and also provided an efficient way for biomass waste utilization.

Increasing the calorific properties of sawdust waste from pellets by torrefaction

Torrefaction, a thermal treatment, was studied as a means to increase calorific properties in sawdust biomass for some wooden species from southeast Europe. Torrefaction of wood material in the form of sawdust waste is known to modify the biomass at the chemical level, especially hemicelluloses. Four wood species, namely beech, spruce, larch, and oak, were thermally treated as sawdust waste at temperatures of 200 °C, 220 °C, 240 °C, 260 °C, 280 °C, and 300 °C for different times of 3 min, 5 min, and 10 min. The results indicated an increase in the calorific value and calorific density with increased torrefaction temperature and time. From the economic point of view, the pellets obtained from torrefied sawdust had better properties than untreated ones. The value-added pellets could compete on the market with traditional fossil fuels.

Characteristic of Chitosan Adhesive from Shell Shrimp Litopenaeus vannamei and Their Application For Producing Particleboard

The shrimp shell that rich compounds of chitin can be converted to produce polysaccharides called chitosan. The chitosan can be utilized as bioadhesive for substitute chemical based adhesive for producing particleboard. The purpose of this study was to evaluate the effect of different concentration acetic acid (CH3COOH) as the solvent to made chitosan adhesive and physical and mechanical properties of the produced particleboard by using sawdust waste. Chitosan adhesive formulation will be used as an adhesive by dissolving chitosan powder with CH3COOH solvent. This research focused on optimization the solvent content wich is CH3COOH in different concentration such as 0.5%, 2% and 4%. Particleboard with size of 25 cm x 25 cm x 0.7 cm with 8%, target density 0.75 g/cm3 were produced using sawdust waste of Paraserianthes falcataria. The processing condition were 180°C in temperature during 12 minutes with pressure of 25 kg/cm2. The research showed, there is no particular trend in particle board characteristics related to solvent concentration. Physical and mechanical Properties fulfill requirement of JIS A 5908-2003 for Moisture Content, MOE and IB. The produced particleboard that using chitosan as bioadhesive and sawdust waste as particle is potentially to be developed technically based on the quality of the particleboards produced.

THE UTILIZATION OF SAWDUST WASTE AS A MEDIA FOR SCULPTURE

Technology has penetrated into the community as a necessity for the sake of acceleration, while art is an inseparable part of the needs of every human being's life, both fine art and applied art. Technology and art cannot be separated at every step forward but the residual waste of technology can used into works of art without using technological aids. Some sculpture works made of wood, cement, fiberglass, metal (brass). This research will look at the extent to which sawdust can used as a medium for making sculptures. Sawdust waste is found in many furniture industries and stage home industries. With sawdust for creative people can used as material for art work.

Production of Brikueda (Briquettes from Teak Sawdusts and Durian Rind/Durio zibethinus) as Renewable Fuels

Jepara is a carving city. The result of carving produces sawdust waste which is usually used to be sold and burned. In addition, durian fruit is available that has a distinctive taste and made an icon of one village in Jepara. The fruit is the belle of the whole community to be eaten by meat and made food. But the skin has the traits and characters that are difficult to decompose. Then the two wastes will be combined with tapioca flour into briquettes as an alternative fuel. This research take four stage: combustion, filtering, printing, and drying. Obtained two treatment, the first treatment is using ratio wood sawdust and durian rind; 50 gr: 50 gr; 25 gr: 50 gr; 50 gr: 25 gr. The results shown it does not ignite up and very hard. The second treatment is using same ratio but added 25 gram starch, the results shown it ignite. This is due to the starch content is used, it ignite the longest with a concentration ratio of 50 gr: 50 gr because its combination increases the calories value. In durian rind there are 3786 cal/g and teak wood consists mainly of cellulose (40-50%), hemicellulose (20-30%), lignin (20-30%), and the calories value of sawdust briquettes is 4714-5519 kcal/kg.©2019 JNSMR UIN Walisongo. All rights reserved.

Non-isothermal kinetics of pseudo-components of waste biomass

Non-isothermal kinetics involved during the slow pyrolysis of waste biomass (sawdust) was investigated. The slow pyrolysis profile of sawdust was distinguished into three reactions corresponding to each pseudo component (hemicellulose, cellulose & lignin) through the deconvolution process. Kinetic triplets (activation energy, reaction mechanism & pre-exponential factor) were estimated for each pseudo component. The Straink (SR) and Friedman (FR) iso-conversional kinetic models were used to calculate the activation energy of pseudo-cellulose (SR = 162.90 kJ/mol, FR = 165.67 kJ/mol), pseudo-hemicellulose (SR = 156.25 kJ/mol, FR = 158.47 kJ/mol) and pseudo-lignin (SR = 301.62 kJ/mol, FR = 316.72 kJ/mol). The reaction mechanism involved during the slow pyrolysis of waste sawdust was identified through integral master plot method. The results revealed that the two-dimensional contract area (R2) and second order reaction (F2) reaction mechanism dominates slow pyrolysis of pseudo-cellulose and pseudo-hemicellulose, respectively. However, no exact reaction mechanism was observed for pseudo-lignin. The pre-exponential factor was determined with the help of the activation energy and reaction mechanism. Thermodynamic parameters i.e. change in enthalpy (ΔH), entropy (ΔS) and Gibb’s free energy (ΔG) were also determined for pseudo-cellulose (ΔH=157.54kJ/mol, ΔS=-17.615 J/mol and ΔG=168.64 kJ/mol) and pseudo-hemicellulose (ΔH=151.28kJ/mol, ΔS=6.61 J/mol and ΔG=147.12 kJ/mol).