Addition Of Rice Husk Research Articles

Effectiveness of rice husk in the removal of methyl orange dye in Constructed Wetland-Microbial Fuel Cell

Research has established that biological processes are more suited for synthetic dyes wastewater treatment than physical and chemical methods. In the present study, a cellulose-based agricultural waste such as rice husk was employed as a substratum in a Constructed Wetland-Microbial Fuel Cells (CW-MFCs) system employing two integrated units one with the down-flow and one with the up-flow system. The study was performed on two levels to assess the efficacy of each process: dye adsorption on the substratum and phytoremediation within the CW-MFC. The adsorption procedure was effective in removing 68 % of the dye in the presence of rice husk. The addition of rice husk to the CW-MFC system increased the dye removal efficiency up to 98 %, COD removal by 85.29 %, with a maximum power density of 102.08 mW/m2. Overall, the results indicate that using rice husk as a supplement in the CW-MFC system may provide effective applications in wastewater treatment.

Enhancing Oil Palm Empty Fruit Bunch (EFB) Compost by Addition of Burnt Rice Husk as Carrier Material for Selected Nitrogen-Fixing Bacteria

The current interest in minimizing the use of inorganic fertilizers and the increasing demand for the combined action of beneficial microorganisms and agricultural wastes is considered to have a positive impact on soil, crop productivity and sustainable agriculture. The objective of this study was to prepare a series of combinations of empty fruit compost (EFBC) and burnt rice husk (BRH) as carrier materials for selected nitrogen-fixing bacteria, evaluate their suitability, and determine the ability of the inoculated EFBC-BRH carrier materials. Different ratios of EFBC and BRH were used to prepare the carrier materials for the selected N₂-fixing bacteria, namely strains Sb35 and Sb42 of Bacillus sp. Both coarse and fine EFBCs were used for the preparations. The suitability of the combinations of EFBC-BRH as a bacterial carrier was tested by inoculating the different ratios of organic material combinations with the N₂-fixing bacteria and incubating them at room temperature for eight weeks, after which the effects on the bacterial population, pH, moisture content, and contaminants were determined. The results showed that the fine-textured EFBC-BRH carriers’ formulation (T5 to T8) were better carriers compared to the formulation of coarse-textured EFBC-BRH carriers (T1 to T4). The inoculated carrier T6 (1 fine structured EFBC: 1 BRH) showed the best response with an increase in Sb35 and Sb42 populations of 7.34% and 7.47%, respectively. In conclusion, T6 as a carrier material for Sb35 and Sb42 is suitable to be developed as a biofertilizer.

Processability and Physical Properties of Compatibilized Recycled HDPE/Rice Husk Biocomposites

The circular economy promotes plastic recycling, waste minimization, and sustainable materials. Hence, the use of agricultural waste and recycled plastics is an eco-friendly and economic outlook for developing eco-designed products. Moreover, new alternatives to reinforce recycled polyolefins and add value to agroindustrial byproducts are emerging to develop processable materials with reliable performance for industrial applications. In this study, post-consumer recycled high-density polyethylene (rHDPE) and ground rice husk (RH) of 20% w/w were blended in a torque rheometer with or without the following coupling agents: (i) maleic anhydride grafted polymer (MAEO) 5% w/w, (ii) neoalkoxy titanate (NAT) 1.5% w/w, and (iii) ethylene–glycidyl methacrylate copolymer (EGMA) 5% w/w. In terms of processability, the addition of RH decreased the specific energy consumption in the torque experiments with or without additives compared to neat rHDPE. Furthermore, the time to reach thermal stability in the extrusion process was improved with EGMA and MAEO compatibilizers. Tensile and impact test results showed that using coupling agents enhanced the properties of the RH composites. On the other hand, thermal properties analyzed through differential scanning calorimetry and thermogravimetric analysis showed no significant variation for all composites. The morphology of the tensile fracture surfaces was observed via scanning electron microscopy. The results show that these recycled composites are feasible for manufacturing products when an appropriate compatibilizer is used.

Development of alternative disposals for waste rice husk and dredged harbor sediment by sintering as lightweight aggregates

ABSTRACT This study developed the alternative disposals for dredged harbor sediments by co-sintering with waste rice husk into lightweight aggregates (LWA) to benefit resource sustainability and waste valorization. The effects of rice husk addition and sintering temperature on LWA performances such as water absorption, particle density, crushing strength, weight loss, volume shrinkage, and open porosity were investigated. The key parameters (e.g. C/Fe ratio in raw materials) controlling the LWA performances and engineering applications were determined. Results showed that dredged harbor sediments could be made into suitable LWA for engineering applications from the controlled rice husk addition and sintering temperature. The addition of rice husk led to lower LWA particle density, but raised water absorption and reduced crushing strength. The increase of sintering temperature reduced water absorption and improved crushing strength. The aggregates with 10–15% rice husk, sintered at 1150 °C had appropriate particle density (1.60–1.73 g/cm3), water absorption (11.8–16.6%), and crushing strength (6.0–10.6 MPa), which could be suitable for lightweight concrete applications. Low water-soluble chloride and heavy metals leachabilities aligned with Taiwan’s regulatory standards for concrete aggregates. Co-treating waste rice husk and dredged harbor sediment into LWA can benefit the waste reduction and circular economy, and reduce the environmental impacts associated with their disposals.

Study of the Mechanical Properties of Polymer Composites Based on Polyolefins with the Addition of Rice Husk and Compatibilizer

The present work studies the mechanical behavior of rice husk as a reinforcement element in mixtures of polyolefins. The composites were made by polyolefin mixtures of 30% LDPE, 40% HDPE and 30% PP, rice husk and Polybond as a compatibilizer. Samples for the tensile test were prepared by injection and compressive methods. The results confirm that rice husk alongside the compatibilizer bring about positively in the strength of composites. In reference to the adherence of rice husk to the mixture of polyolefins, which was studied from the microstructure of composites, the addition of compatibilizer improves the adherence between the polyolefins and rice husk, and thereby the quality in the fracture surface. These composites are considered to be a good alternative for the recovery of plastic agricultural waste.

Effect of tillage and mulching on soil moisture conservation and soil fertility cultivating pigeonpea (Cajanus cajan L.)

A field experiment was conducted to evaluate the effect of tillage and mulching materials on soil moisture conservation and soil fertility status. The study revealed that types of tillage did not have any significant effect on soil moisture content, soil pH, organic carbon, available N, available P and available K. Application of all the mulching materials significantly increased available N and available K as compared to control. The organic C increased significantly with all the mulching materials over control except in saw dust application. Application of saw dust, rice husk and plastic mulch caused an increase of 21.96, 10.73 and 13.80%, available P, respectively. On an average, addition of plastic mulch, saw dust, rice husk and straw mulch increased 81.25, 71.84, 70.27 and 64.02% moisture content, respectively as compared to control. The results from the study substantiate the importance of mulching materials for soil moisture conservation and improvement in soil fertility status.

Novel Foaming-Agent Free Insulating Geopolymer Based on Industrial Fly Ash and Rice Husk.

This study highlights the synthesis of a new thermal insulating geopolymer based on the alkaline activation of fly ashes. A porous geopolymer material can be prepared without the addition of a foaming agent, using high ratio solution/ashes (activating solutions used are water, sodium or potassium hydroxide). In order to increase the porosity of the material and to make it more ecological, rice husks are incorporated into the formulation. The geopolymer materials were prepared at room temperature and dried at moderate temperature (105 °C) by a simple procedure. The microstructural characteristics of these new porous geopolymers were assessed by optical microscopy, X-ray diffraction (XRD), thermogravimetric analysis (TGA) and X-ray fluorescence (XRF). Infrared spectroscopy (FTIR) was used to confirm the geopolymerisation. The effect of the ratio solution/ashes and the percentage of the rice husk addition on thermal and mechanical analysis was evaluated. An insulating material for a solution/ashes ratio of 0.9 and a rice husk content of 15% having a λ value of 0.087 W/(m·K), a porosity of 61.4% and an Rc value of 0.1 MPa was successfully prepared.

Preparation and Characterization of Polyethylene Biocomposites Reinforced by Rice Husk: Application as Potential Packaging Material

The development of biodegradable materials as food packaging material is important not only due to the reduction in environmental pollution but also because of an improvement in the functionality. Rice husk-reinforced biopolymers have offered a possible solution to waste-disposal problems associated with traditional petroleum-derived plastics. Rice husk-reinforced low density polyethylene (LDPE)-based biocomposites have been of great interest for their use as food packaging material. In this work, the LDPE/RH biocomposites with different rice husk (RH) content (10, 20, 30, 40 and 50 wt.%) were prepared by the melt mixing process in a laboratory Brabender mixer. The effect of RH content on the physical, thermal and mechanical properties of LDPE was investigated. More importantly, this work aimed to research the biodegradation of the LDPE/RH biocomposites as well as their effect on ‘Granny Smith’ apples’ respiration. The results showed that the incorporation of RH into the LDPE decreased the thermal stability of LDPE, increased water vapour permeability and water absorption, and increased the degree of crystallinity. The incorporation of RH increased the biodegradability of LDPE as well as the postharvest quality of ‘Granny Smith’ apples. The addition of RH in LDPE film significantly decreased fruit respiration and increased firmness as compared to LDPE film. The composting results showed that after the LDPE/RH biocomposite films were biodegraded for 21 days, the biocomposite films with the highest content of rice husks were the most degraded.

Comparative study on the effect of different dewatering skeleton conditioners on sludge pyrolysis products

Sewage sludge (SS) dehydration using skeleton conditioners is the main method of sludge treatment; however, the effects and mechanism of skeleton conditioning on pyrolysis products in the sludge conditioning–dehydration–pyrolysis process are still unclear. In this study, thermogravimetric mass spectrometry (TG-MS) and pyrolytic gas chromatography/mass spectrometry (Py-GC/MS) were used to study the release characteristics of condensable and non-condensable gases in the pyrolysis process of sludge samples treated with biochar (BC), rice husk (RH) and coal ash (CA), so as to clarify the effects of different skeleton conditioners on the pyrolysis products of sludge. The results indicate that the addition of RH promoted the generation of C/H/O-containing gases during pyrolysis. In terms of the release of pollutants, the addition of RH increased the release of NH3, the addition of CA increased the production of H2S and COS, and the addition of RH decreased the release of Cl2 and CH3Cl. The three skeleton conditioners did not noticeably promote or inhibit the release of S-containing pollutants during sludge pyrolysis. Several reaction kinetic models fitted using the Coats–Redfern method have shown that the addition of BC and CA had a certain catalytic effect on sludge pyrolysis, reducing the activation energy (Ea). By comprehensively comparing and analyzing the reaction mechanism of the skeleton conditioner in sludge pyrolysis and their influence on the pyrolysis products, a theoretical basis for future research on skeleton conditioners was developed to improve the dewatering and pyrolysis of SS.

Analisis Kinerja Kiln dengan Menggunakan Campuran Batubara dan Sekam Padi Sebagai Bahan Bakar Alternatif pada Pabrik PT. Semen Tonasa

The cement industry is one of the energy intensive industries, because it absorbs a large amount of energy, and the kiln is the heart of the thermal energy system which is used as a place for combustion and clinker formation, therefore efforts are needed to determine the effect of using rice husk fuel on additional energy needed for combustion in the kiln and knowing the magnitude of the effect of adding rice husks on coal savings. This research was conducted to collect operational data of kiln which was obtained from the Central Control Room (CCR) Unit of Tonasa IV Factory of PT. Semen Tonasa. Data is taken directly on a computer which functions to regulate the operation of all production processes at the Tonasa IV Factory. The results of the analysis show that the use of rice husks has a relatively small effect on the energy produced when compared to without using rice husks. The addition of rice husk fuel does not show a significant effect on coal savings, but using rice husks can provide a calorific value of 3300 kcal / kg. In 1 kg of rice husk contains a calorific value of 3210 kcal / kg while in 1 kg of coal contains a heating value of 4910 kcal / kg, it can be seen that 1 kg of rice husk can replace approximately 1.53 kg of coal.

Novel non-hydroxyl synthesis and fabrication of advanced hybrid inorganic-organic geopolymeric coating material for corrosion protection

The objective of this paper was to fabricate advanced geopolymeric coating materials having advanced hybrid inorganic-organic characters (using novel solid state geopolymerization processes), which can effectively protect mild steel substrates from the damaging effects of corrosion. To achieve this objective, different geopolymeric mix designs were formulated using fly ash as an amorphous silicoaluminous source and rice husk as a source of organic components and other raw materials. The developed materials were coated on the substrate via a paint brush technique. In order to understand and correlate coating performance, fabricated hybrid geopolymeric coatings were first tested for adhesive strength and then for water resistance and corrosion resistance properties. A geopolymer-epoxy composite was also prepared using epoxy resin as yet another hybrid organic additive and results indicated the superiority of this composite in terms of adhesion and other studied properties. The microstructures, thickness and elemental composition of different geopolymeric coating compositions were studied using FESEM and EDX spectral analysis. Results revealed that rice husk addition to geopolymeric matrix not only enhanced gelation but also contributed to good adhesion and excellent corrosion protection for the underlying substrate. A geopolymer-epoxy composite on other hand, owing to its high crosslinking structure, performed extremely well for all parameters. Fabricated hybrid geopolymeric coating material find its application as corrosion protective coating for different industries to ensure metal durability and reduction in unwanted maintenance cost.

Effectiveness of fly ash, zeolite, and unburnt rice husk as a substitute of cement in concrete

This experimental study analyzed the impacts of unburnt rice husk, fly ash, and zeolite on the strength of glass powder added concrete. At the first stage of the study up to 30% mass of fine aggregates was replaced by glass powder to understand the impact of the glass powder on the strength of concrete. Study results show that increasing the concentration of glass powder tends to decrease the compressive strength of the concrete. The relative decrease in compressive strength with 10% and 30% content of glass powder was measured at 9.5% and 13.3%, respectively. Furthermore, at a 10% constant concentration of glass powder several concrete specimens were prepared using unburnt rice husk, fly ash, and zeolite powder as replacement of cement (up to 15%). Study results indicate that the use of unburnt rice husk, fly ash, and zeolite with the combination of glass powder decreases the compressive strength of concrete. The lowest reduction rate was observed for fly ash added concrete, while the addition of unburnt rice husk shows the highest reduction in compressive strength.

Effect of rice husk addition on the physicochemical and hydrological properties on green roof substrates under subtropical climate conditions

Green roof substrates provide water, nutrients, and physical support to vegetation development, as well as being a key element in the hydrological performance of the system. In this regard, the use of aggregate components that improve physicochemical properties of the substrates optimises the ecosystem services provided by green roofs. This study demonstrates the effects of using rice husk as an aggregate material in engineered substrates for extensive green roofs. Sixteen different substrates compositions were tested with different proportions of natural (NRH) and carbonized (CRH) rice husk incorporated into a base mixture with fixed proportions of vermicompost, vermiculite, and construction waste. The study consists of two phases: i) laboratory analyses to assess the substrates' physicochemical properties, and ii) a pilot-scale field experiment to evaluate hydrological performance under real subtropical climate conditions and vegetation development using a monoculture planting of Sedum rupestre. The findings showed that CRH has the potential to improve some physicochemical properties, such as water holding capacity, bulk density, and porosity. Additionally, CRH substrates presented a slightly increased average retention rate (up to 7%) comparing to local topsoil. The average stormwater retention rate for all engineered substrates was 77.73%. Multiple linear regression models were satisfactorily fitted to observed data from the open field experiment allowing an estimation of potential substrates’ retention rates. Moreover, vegetation development was positively affected by adding CRH comparing to the NRH. Carbonized rice husk presents as a useful material for improving green roof substrates properties and could be a sustainable alternative for local agriculture waste management.

Influence of rice husk addition on phosphorus fractions and heavy metals risk of biochar derived from sewage sludge

This study investigated the effects of rice husk dose and pyrolysis temperature on the phosphorus (P) fractions and environmental risk of heavy metals in biochar co-pyrolyzed from sewage sludge and rice husk. Biochar properties were analyzed, and the transformation of P and heavy metals speciation during co-pyrolysis were also discussed. Co-pyrolysis of raw sludge and rice husk (10–50 wt%) could increase the carbonization degree and stability of biochar at 500 °C. The organic P (OP) in raw sludge (68 wt%) was transformed to inorganic P (IP) during co-pyrolysis, indicating that the addition of rice husk could improve biochar-P bioavailability by promoting the transformation of IP. The IP content increased from 71.5 wt% of sludge biochar to 92 wt% of blended biochar (50 wt% sludge and 50 wt% rice husk) at a pyrolysis temperature of 500 °C. With the mass ratio of sludge to rice husk of 5:5, the OP content decreased from 3 mg g−1 to 0.75 mg g−1 as the pyrolysis temperature increased from 300 °C to 700 °C. The 31P nuclear magnetic resonance spectra and X-ray photoelectron spectroscopy results showed that P species in biochar mainly existed as orthophosphate, which can be directly taken up by plants. After co-pyrolysis, the toxicity and mobility of heavy metals gradually decreased with increasing rice husk dose and pyrolysis temperature. The study indicates that co-pyrolysis of sewage sludge and rice husk could be a promising P reuse strategy.

Peningkatan konduktivitas termal lemak sapi sebagai bahan PCM dengan menambahkan arang sekam padi

Phase change material (PCM) is a material that can absorb and store energy and can release it based on the principle of latent heat energy storage. Beef tallow is one of the materials that can be used as PCM but its low thermal conductivity is around 0.181 W/mK. Hence, thermal conductivity is considered an important factor in the conduction heat transfer. This further affects kinetic absorption and heat release. However it is possible to increase the values by adding another material that has a high thermal conductivity. The purpose of this study is to elevate the thermal conductivity of beef tallow by adding rice husk char. This research involves direct incorporation method, where beef tallow is thawed and mixed with the rice husk char then stirred with a rotation of 100 rpm until the mixture becomes solid. Addition of rice husk char with weight fractions of 5 and 10% and grain size of 0.045 mm. Subsequently, thermal conductivity test was performed using the TQ Heat Transfer Experiment Base Unit.The results show that with the addition of rice husk can increase the thermal conductivity of PCM beef tallow. The increase obtained in the addition of 10% rice husk char is 37 times compared to the pure sample. Based on this result it is concluded that carbon-based materials such as rice husk char can be used to increase the thermal conductivity of PCM materials.

Avaliação do desempenho de painéis cimento-madeira fabricados com duas espécies florestais em combinação com casca de arroz

O presente trabalho objetivou avaliar o desempenho de painéis compostos de cimento e diferentes proporções de duas espécies de madeira combinadas com casca de arroz. Foram produzidos painéis experimentais cujas proporções de partículas de madeira utilizadas foram de 0-25-50-75 e 100%, enquanto a proporção de cascas de arroz foi de 100-75-50-25 e 0%, respectivamente. As espécies de madeiras utilizadas no estudo foram Eucalyptus grandis W. Hill ex Maiden e Pinus elliottii Engelm. Para determinar a qualidade dos painéis foram avaliadas as propriedades físicas (massa específica; absorção de água e inchamento em espessura após 2 e 24 horas de imersão) e as propriedades mecânicas (MOE e MOR em flexão estática e ligação interna), de acordo com a ASTM D-1037 (1999). Os resultados obtidos foram discutidos a partir da literatura, incluindo as recomendações do processo Bison (1978) para painéis cimento-madeira comerciais. Os painéis produzidos com partículas de pinus apresentaram desempenho nos testes de absorção e inchamento em espessura para imersão de 24 horas, inferior se comparado aos painéis fabricados com partículas de eucalipto. A adição de cascas de arroz, contudo, melhorou as propriedades físicas dos painéis fabricados tanto com partículas de pinus, quanto com partículas de eucalipto. Quanto maior a quantidade de cascas de arroz adicionada à chapa, menores foram as taxas de absorção de água e inchamento em espessura. As propriedades mecânicas dos painéis foram afetadas positivamente com a proporção de partículas de madeira. Sendo que o pinus apresentou melhores resultados para o módulo de elasticidade e a ligação interna; o eucalipto apresentou melhor performance para o módulo de ruptura. A adição de cascas de arroz representou perda de resistência mecânica para todos os tratamentos em todas as propriedades avaliadas.

Enhanced biodegradation and processability of biodegradable package from poly(lactic acid)/poly(butylene succinate)/rice‐husk green composites

AbstractThis work aims to study the possibility to process PLA/PBS/RH green composites into hexagonal plant‐pots employing a large‐scale industrial operation using injection molding. Green composites based on poly(lactic acid) (PLA), poly(butylene succinate) (PBS), and rice husk (RH) with various RH contents (10–30%wt.) were produced successfully using a twin‐screw extruder. The compatibility of RH‐matrix was improved by chemical surface modifications using a coupling agent. RH was analyzed as an effective filler for PLA to develop green composites with low cost, high biodegradability, improved processability, and comparable mechanical properties as unfilled PLA. With increasing RH content, tensile modulus of the composites increased gradually. The addition of PBS, at PLA/PBS ratio of 60/40, improved the elongation at break and impact strength of PLARH30 by 55% and 7.1%, respectively. The suitable processing temperatures for PLA decreased from 220–230°C to 170–180°C when 30%wt. RH was composited into PLA matrix and were further reduced when PBS was applied. After biodegradation via either enzymatic degradation or hydrolysis, surface erosion with a large number of voids, mass loss, and the substantial decrease in tensile strength of all the composites were observed. In addition, the biodegradation of the composites has been improved by the addition of either RH or PBS.

Pirinç Kabuğu Atıklarının Köpük Beton Üretiminde Kullanılması

Günümüzde yapılan binaların büyük bölümünün temel yapıtaşını oluşturan betonun, dünyada sudan sonra en çok tüketilen yapı malzemesi olduğu belirtilmektedir. Betonun ana maddesi olan çimento, beton maliyeti içerisinde önemli paya sahip olmasından dolayı, çeşitli katkı maddelerinin çimento ikame maddesi olarak kullanımı çok sayıda araştırmaya konu olmaktadır. Ancak, kullanılan katkı maddelerinin beton özelliklerini ne düzeyde etkilediği öncelikli olarak belirlenmelidir. Bu çalışmada da pirinç (çeltik) kabuğu külünün çimento ikame maddesi olarak kullanımının bazı beton özelliklerini hangi düzeyde değiştirdiği belirlenmiştir. Çalışma kapsamında ayrıca pirinç kabuğunun ham halinin de beton içerisinde agrega olarak kullanılabilirliği değerlendirilmiş böylece, tarımsal atık olan pirinç kabuğunun bertaraf edilmesinde etkin bir yöntem de belirlenmeye çalışılmıştır. Çalışma sonuçları hem pirinç kabuğu külü hem de pirinç kabuğu agregası ilavesinin, betonun neredeyse bütün özelliklerini önemli ölçüde değiştirdiğini göstermektedir. Bu değişiklikler farklı özellikler açısından farklı düzeydedir. Çalışma sonucunda köpük miktarı arttıkça yayılma çapının da arttığı buna karşılık pirinç kabuğu ilavesinin yayılma çapını azalttığı belirlenmiştir. Pirinç kabuğu ilavesinin zamana bağlı su işleme derinliğini azalttığı, pirinç kabuğu ilavesi yüksek düzeyde olan numunelerin porozitesinin arttığı, basınç ve eğilme dayanımının ise azaldığı belirlenmiştir.

Regulation of ash slagging behavior for sewage sludge by rice husk addition: Focusing on control mechanisms

Combustion of sewage sludge (SS) is a promising alternative waste-to-energy process. However the mono-combustion of SS may induce severe ash slagging behavior, which will shorten the life of the combustion reactor. In this study, rice husk (RH) as a clean and high-energy density auxiliary was introduced to improve the slagging characteristics of SS and the underlying mechanism was revealed. The results indicated that RH addition can raise ash fusion temperature (AFT) of SS during co-combustion and the growth rate of AFT increased significantly under high RH dose. Slagging and fouling indices showed that slagging tendency of the co-combustion ashes could be neglected under 50% RH addition. Overall, co-processing of SS and RH is an ideal route to solve ash-related problems. The inhibition mechanism of RH addition to the slagging behavior of co-combusted SS was determined as follows: (1) Insufficient iron-bearing phases caused the formation of refractory co-combustion ash; (2) a reduced liquid phase, which acts as a glue to bond the ash grains, played a significant role in slagging control; (3) fiber-like structures, distributed as discrete particles to form a porous structure, reduced the cohesive bonds in ash agglomerates, which further inhibited ash slagging.

Karakteristik Kimia - Fisika Tanah Bekas Tambang Semen Yang Ditambah Sekam Padi atau Serbuk Gergaji dan Pertumbuhan Wodyetia bifurcata A.K. Irvine

The cement industry only takes the top clay and the next layer of soil is left unused. This study was aimed to analyze some of the chemical and physical properties of the ex-mining land of cement which added with rice husks or sawdust and the growth of Wodyetia bifurcata seedlings. A growth medium is made from ex-mining land of cement by the addition of rice husk or sawdust with a different amount of material percentage. All the growth medium contains organic C ranges of 0.56-3.09%, total N ranges of 0.09-0.33%, available P ranges of 8.42-31.16mg/100g, available K ranges of 6.54-16.32mg/100g, and bulk density ranging of 0.24-1.09gcm-3. The seedling height growth of Wodyetia bifurcate about 13.5 - 15.2 cm, the range of stem diameter is 0,71-0,86 cm, the root length about20.2-29.8 cm, the number of leaves is 2.2-2.8, as well as seed quality index ranging of 0.09-0.13. The addition of 50% rice husk (B2) produced organic C, total N, available P and K and bulk density of the ex-mining land of cement and provides the highest growth of Wodyetia bifurcata A.K. Irvine seedlings.