Rice husk is often interpreted as waste material or leftover material from the rice milling process. Processes that have an impact on running slowly, not only disrupt the surrounding environment but also interfere with human health. At every mill, we will always see piles and even mountains of husks that are getting taller and taller. Currently, the use of rice husks is still very little, so that the husks are still a waste material that disturbs the environment (Aziz, 1992).
Rice husk consists of a hard layer that includes a kariopsis which consists of two halves called the lemma and palea which are interlocked. In the rice milling process, the husks will be separated from the rice grains and residue or milling waste (Aziz, 1992).
The structure of rice husks has four layers, namely the outermost epidermis which is covered with the epidermis, Scelerenchyma, Spongi parenchyma, and the innermost epidermis. Of the four layers above, rice husk has silicon that is dominant in both layers of the epidermis which functions as a hardener and protector of the grain against fungi (Aziz, 1992).
Chemical properties of rice husks are generally composed of organic and inorganic components. Components include carbohydrates which are dominated by cellulose and hemicellulose. Crude protein in rice husk is about 3% and lipid 0.039-2.98% (Primo et al, in Luh, 1980). The amount of pure lignin in rice husk is around 19.20-24.47% (Lenzio in Luh, 1980). The vitamins contained in rice husks include thiamin, riboflavin, and niacin then about 13.2-29.0% of the weight of rice husks are inorganic components such as Fe, Ca, Mg, P, and others are compounds needed in rice growth (Houston in Luh, 1980).
Husk is classified as biomass that can be used for various needs such as industrial raw materials, animal feed and energy or fuel. From the rice milling process, about 20-30% of the grain is usually obtained. The use of husk energy aims to reduce expenditure costs for fuel for farmers' households. From the rice milling process, about 20-30% of husks are obtained, bran between 8-12% and milled rice between 50-63.5% of the initial weight of grain data. Husk with a high proportion can cause environmental problems (Houston in Luh, 1980).
Bibliography:
Azis, S.A, Krisantini, Winarso D. Widodo and Aris Munandar. 1992. Study on the Utilization of Husk, sawdust, bark and peanut shells as a medium for growing plants in containers. IPB. Bogor.
Rice Husk 1. Its high silica content makes it useful for strengthening building materials 2. It resists fungal decomposition 3. It resists moisture penetration 4. It decomposes slowly 5. It insulates well 6. Itâ??s renewable It has been used as building material, fertilizer, insulation material, or fuel. Combustion of rice hulls produces rice husk ash (RHA) which is a potential source of amorphous reactive silica. Most of the ash is used in the production of Portland cement.
Rice hulls (or rice husks) are the hard protecting coverings of grains of rice. In addition to protecting rice during the growing season, rice hulls can be put to use as building material, fertilizer, insulation material, or fuel. AND ANIMAL FEED 0 Potential On-Farm Uses of Rice Hulls Compost Production and Soil Improvement. ... Biochar Production. ... Fuel and Briquette Production. ... Supplemental Construction Material. ... Bedding for Hog/Chicken Deep Litter Systems. ... Livestock Feed Supplement. ... Potting Mix Production. ... Mushroom Production Substrate.
1> Easily mixing with soil for applying. 2> It loosen the soil, and improve the permeability of air and water for the soil. 3> Improving the three phases of the soil. Enhancing the capacity of oxygen supplying to achieve the effect of improving the soil. 4> Fully fermented without odorous. It can be applied both indoors and outdoors. 5> Rich in varieties of organic matter, humus, silica acid, etc. 6> Rich in varieties of microorganisms, it helps to decompose the organic matter and change the nitrogen form which can promote the absorbed nutrient for plants. 7> All purposed type. Can be used as materials for culture soil, soil conditioner or ground mulch to prevent weeds and keep moisture and warm for the soil.
- Material: 100% rice husk - Size: 0,3 -0,5 mm; 0,7 mm - Aflatoxin B1: 0.32mcg/kg - Aflatoxin B2: Not detected, LOD = 0.3ppb - Aflatoxin G1: 0.50 mcg/kg - Aflatoxin G2: Not detected, LOD = 0.3ppb - Moisture: 9.75% - Crude fat: 0.68% - Crude protein: 2.35% - Ash: 10.74% - Crude fiber: 49.47% - Moisture: max 10%
- Material: 100% rice husk - Size: 1,8 -2,2 mm - Aflatoxin B1: 0.32mcg/kg - Aflatoxin B2: Not detected, LOD = 0.3ppb - Aflatoxin G1: 0.50 mcg/kg - Aflatoxin G2: Not detected, LOD = 0.3ppb - Moisture: 9.75% - Crude fat: 0.68% - Crude protein: 2.35% - Ash: 10.74% - Crude fiber: 49.47% Moisture: max 10%
Moisture: 2.9% - Loss on ignition: 13.4% - Sulfur trioxide (SO3): 0.8% - Carbon (C): 9.0% - Silicon dioxide (SiO2): 81.2% - Iron oxide (FeO3): 0.4% - Aluminum oxide (Al2O3): 0.1% - Magnesium oxide (MgO): 0.4% - Calcium oxide (CaO): 0.6% - Sodium oxide (Na2O): 0.2% - Potassium oxide (K2O): 3.5% - Appearance density after compaction: 0.24%