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 Researcherนาย สุทิน สมบูรณ์ที่ทำงาน:ภาควิชาเพาะเลี้ยงสัตว์น้ำ คณะประมง บางเขน สาขาที่สนใจ:โภชนศาสตร์สัตว์น้ำ อาหารสัตว์น้ำ Resume |
Researcherนาง สมบูรณ์ บุญปรีชาที่ทำงาน:ศูนย์ปฏิบัติการวิจัยและเรือนปลูกพืชทดลอง (ศูนย์วิจัยและบริการวิชาการ) คณะเกษตร กำแพงแสน Resume |
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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Quality Developments in Pulp Fibers using Conventional Papermaking Laboratory Beaters and an Industrial Pilot Refiner) ผู้เขียน: ดร.พิชิต สมบูรณ์, ผู้ช่วยศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractThe research focused on the examination of quality developments of bleached kraft softwood pulp in the papermaking process. The pulp was mechanically treated using conventional papermaking laboratory beaters and an industrial pilot refiner. The conventional laboratory devices studied were a PFI mill and a Valley beater, while a Voith LR 40 industrial pilot refiner was used to represent a mill refiner. The results showed that the pulp fibers developed in different directions depending on the testing devices. The pulp samples treated using the laboratory equipment were found to contain a higher ratio of long fibers, a higher coarseness and a greater internal change of fiber structure, while the pulp samples refined using the industrial pilot refiner consisted of a shorter fiber, a lower level of internal structural changes in the fiber walls and a higher content of fines. The paper made from the pulp manipulated using the laboratory equipment had a superior strength, while the paper made from the pulp treated using the industrial pilot refiner had a poorer strength and a lower density, but had a higher light scattering value. The results of this study indicated that laboratory pulp cannot be used directly to examine fiber actions under industrial operations. Further research should study pulp characteristics and their effects on the papermaking process with regard to the correlation between laboratory work and industrial performance. |
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หัวเรื่อง:การศึกษาการใช้แผ่นใยสังเคราะห์ Geotextile เป็นวัสดุกรองในเขื่อนดินที่สร้างด้วยดินกระจายตัว ผู้เขียน: Aramsri Phathanasobhon, Somboon Munkuamdee สื่อสิ่งพิมพ์:pdf AbstractResearch was conducted to evaluate the filtration performance of geotextile in the earth dam constructed with dispersive soils, in order to seek for a method of preventing sinkhole, piping and failure of the earth dam caused by sodium dispersive clay. The test was done by compacting fine grain soils in the mold and water was caused to flow through a small hole punched in a specimen, then discharged through the geotextile placed adjacent to the specimen as a filter. The volume of effluent was recorded while the colour of water was observed, and then flow rates were calculated. The result showed that, at the first interval, the effluent was visibly cloudy indicating the dispersive clay eroded by water, later the effluent became clearer with time and completely clear at last. The rate of flow at the beginning was rather fast and became slower gradually and was almost stable at last. The results indicated that the dispersive clay particles eroded by water were accumulated at the surface of geotextile and gradually formed complex structure which resulted in decreasing in flow rate. When the complex structure was completed, the rate of flow became stable. At the end of the successive flow tests, the apparatus was dismantled and the specimen was extruded and broken to examine the size of the hole. The test result showed that some clay particle filled in the hole and some attached to the surface of geotextile acting as the filter for dispersive clay. The test results also showed that, with different pore size of geotextile, the rate of flow would be different only during the first week, later the rate of flow was nearly the same, and after 29 days from the beginning the rate of flow was rather stable. |
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หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Drying of High Moisture Paddy by Two-Dimensional Spouted Bed Technique) ผู้เขียน:Somboon Wetchacama, Somchart Soponronnarit, Thanit Swasdisevi, Somkiat Prachayawarakorn, Jinda Panich-ing-orn, Suchart Suthicharoenpanich สื่อสิ่งพิมพ์:pdf AbstractThe objectives of this research were to design and construct a two-dimensional spouted bed dryer with draft plates, to study drying kinetics of paddy, paddy quality and specific primary energy consumption. Experimental drying conditions were as follows: initial paddy moisture contents (Mi) of 31.1-45.6% dry basis (d.b.), inlet air temperatures (Ti) of 130, 140 and 150?C, hold-ups (H) of 20, 25 and 30 kg. Experimental results showed that minimum spouting velocity of drying air at the inlet of drying chamber was 15.4-16.4 m/s equivalent to velocity through the draft plates of 3.9-4.1 m/s. The operating parameters affecting drying rate and specific primary energy consumption were drying temperature and specific air flow rate or hold-up. Those affecting head rice yield and rice whiteness were initial and final moisture contents of paddy and drying air temperature. The entrance height directly affected energy consumption of the fan. The suitable entrance height was 10 cm as it resulted in minimum energy consumption. The first order polynomial equation was accurate and appropriate for predicting drying rate. |
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