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Recovery of Critical Elements (Dysprosium and Ytterbium) from Alkaline Process of Indonesian Zircon Tailings: Selective Leaching and Kinetics Study 印尼锆石尾矿碱法回收关键元素(镝、镱):选择性浸出及动力学研究
IF 2.8 4区 管理学 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2023-06-28 DOI: 10.14716/ijtech.v14i4.4960
G. Prameswara, I. Trisnawati, T. Handini, H. Poernomo, P. Mulyono, A. Prasetya, H. T. Petrus
. Rare earth metals are important today, especially for heavy rare earth elements (HREEs). Dy and Yb, included in the HREE group, are widely used for permanent magnets and sensors. On the other hand, accumulated solid waste of zircon tailings is an environmental issue in mineral processing. Valuable minerals such as rare earth elements (REEs) also remain in the tailings. This study aims to determine the optimum conditions of the experimental parameters and obtain an appropriate kinetic model. The leaching process was carried out in a flat bottom three-neck flask equipped with a thermometer and reflux condenser. Observation of the effect of process conditions on recovery and kinetics analysis obtained satisfactory results. In this study, Dy and Yb leaching from solid REE-hydroxide using HCl solution afforded a total of 61.71% and 74.55% recovery of Dy and Yb, respectively, at operating conditions of 1 M HCl, 60 o C, 10 g/100 mL (solid-to-liquid ratio), at 60 min (leaching duration), and 150 rpm (stirring speed). It was found that the leaching process was controlled by chemical reactions with apparent activation energies of 31.68 kJ/mol and 11.95 kJ/mol for Dy and Yb leaching, respectively.
. 稀土金属在今天很重要,尤其是重稀土元素(hree)。Dy和Yb属于三稀土族,被广泛用于永磁体和传感器。另一方面,锆石尾矿固体废弃物的积累是选矿过程中的环境问题。有价值的矿物,如稀土元素(ree)也留在尾矿中。本研究旨在确定实验参数的最佳条件,并获得合适的动力学模型。浸出过程在装有温度计和回流冷凝器的平底三颈烧瓶中进行。观察了工艺条件对回收率的影响,并进行了动力学分析,取得了满意的结果。本研究中,在HCl浓度为1 M,温度为60℃,料液比为10 g/100 mL,浸出时间为60 min,搅拌转速为150 rpm的条件下,用HCl溶液从固体ree - oh中浸出Dy和Yb, Dy和Yb的总回收率分别为61.71%和74.55%。发现浸出过程受化学反应控制,Dy和Yb的表观活化能分别为31.68 kJ/mol和11.95 kJ/mol。
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引用次数: 0
Silica-Chitosan Nanocomposite Coatings for Enhancing Hydrophilicity of Polyester Fabric 二氧化硅-壳聚糖纳米复合涂层增强聚酯织物亲水性
IF 2.8 4区 管理学 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2023-06-28 DOI: 10.14716/ijtech.v14i4.4786
Rr. Wiwiek Mulyani, A. Nuruddin, S. Suprijanto, B. S. Purwasasmita
. The hydrophilicity of polyester fabric surfaces has been modified using silica-chitosan nanocomposites. The silica-chitosan nanocomposite was synthesized by the sol-gel method from sodium silicate and various chitosan concentrations of 0 – 1.5% at a pH of 3 – 5. A single jersey knitted polyester fabric was coated by silica-chitosan nanocomposite using the pad-dry-cure method. It was found that the chitosan concentration and the solution pH controlled the formation of various size distributions of sphere nanocomposites with an average size of 96.0-201nm. The coated polyester fabric with sphere silica-chitosan exhibits a rough surface and produces a contact angle approaching 0°, facilitating the polyester fabric's speed-up water absorption and hydrophilic properties.
. 采用二氧化硅-壳聚糖纳米复合材料对聚酯织物表面的亲水性进行了改性。以水玻璃为原料,在pH为3 ~ 5的条件下,以0 ~ 1.5%的壳聚糖为原料,采用溶胶-凝胶法制备了二氧化硅-壳聚糖纳米复合材料。采用衬垫-干固化法制备了二氧化硅-壳聚糖纳米复合涂层。结果表明,壳聚糖浓度和溶液pH控制了球形纳米复合材料的不同粒径分布,平均粒径为96.0 ~ 201nm。球形二氧化硅壳聚糖涂层聚酯织物表面粗糙,接触角接近0°,有利于聚酯织物的加速吸水和亲水性。
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引用次数: 0
The Evaluation of Displacement Ductility of Low Confinement Spun Pile to Pile Cap Connections 低约束旋旋桩与承台连接的位移延性评价
IF 2.8 4区 管理学 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2023-06-28 DOI: 10.14716/ijtech.v14i4.5889
M. Orientilize, W. Prakoso, Y. Lase, Sidiq Purnomo, Ignatius Harry Sumartono, Winda Agustin
. Experimental study was carried out on three low confinement spun piles to pile cap connections. The detail followed the typically fixed connection in Indonesia. Reinforced concrete was filled to the spun pile to strengthen the connection region, except SPPC01. Different concrete types were used, shrinkage and non-shrinkage for SPPC02 and SPPC03, respectively. SPPC02 and SPPC03 could reach the targeted drift of 3.5% whereas SPPC01 was stopped at a drift of 2.75%. There was no shear failure detected during the test. The connection behaved as a fixed connection indicated by the fracture failure of the prestressed bars near the connection region. Analysis of the test results focused on displacement ductility. Two definitions of yield and ultimate displacement were employed to seek the possible ductility values. It varied from 3.05 to 6.04 for SPPC01 and from 3.01 to 4.95 for SPPC02 and SPPC03. The non-shrinkage concrete did not affect the strength of the connection but slightly improved the post-peak behavior. The ductility is 6 – 12% higher than spun piles with ordinary concrete. According to the limited ductility referring to ATC 96, JRA 2002, and AASHTO 2011, all specimens could achieve target ductility 3. Hence, it can be concluded that the low confinement spun pile connections performed well in displacement ductility.
. 对3种低约束旋压桩与承台连接进行了试验研究。细节遵循印度尼西亚典型的固定连接。除SPPC01外,在旋桩内填充钢筋混凝土加固连接区域。采用不同的混凝土类型,SPPC02和SPPC03分别为收缩和不收缩混凝土。SPPC02和SPPC03可以达到3.5%的目标漂移,而SPPC01在2.75%的漂移时停止。试验过程中未检测到剪切破坏。连接区域附近预应力杆的断裂破坏表明该连接为固定连接。对试验结果进行了位移延性分析。采用屈服和极限位移两种定义来寻求可能的延性值。SPPC01为3.05 ~ 6.04,SPPC02和SPPC03为3.01 ~ 4.95。不收缩混凝土不影响连接的强度,但略有改善峰后性能。其延性比普通混凝土旋打桩高6 ~ 12%。根据ATC 96、JRA 2002和AASHTO 2011的有限延性标准,所有试件均可达到目标延性3。由此可见,低约束桩连接具有良好的位移延性。
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引用次数: 0
Coating Material Development by Pulsed Laser Deposition for JIS SKD61 Steel Insert Pins Used in Aluminum Casting Industry 用脉冲激光沉积法制备铸造用JIS SKD61钢插销涂层材料
IF 2.8 4区 管理学 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2023-06-28 DOI: 10.14716/ijtech.v14i4.6046
Rusman Kosasih, D. Priadi, M. M. Suliyanti
. A Pulsed Laser Deposition (PLD) technique is a type of physical vapor deposition (PVD) technology. This research is one of a series of PVD studies aimed at determining the best PLD coating that can minimize the damage of steel pins made of SKD61 with a hardness of 48±1 HRc. The study began with the dummy blocks from SKD61 as research samples, followed by PVD-PLD with three coating materials as alternatives: Al/Cr (70:30), Al/Ti1 (50:50), and Al/Ti2 (63:37), all without active gases (N and C). The procedures used to test the research findings were FESEM, SEM, XRF, EDS, Vickers, and Rockwell Microhardness. The experiments were conducted at the BRIN Fotonic Research Center and the PT AHM Laboratory. The PLD process lasted for 10 minutes and employed an Nd: YAG laser with a wavelength of 1064 nm, a Q-switch with a time delay of 180 s, a pulse energy of 70 mJ, and a vacuum pressure of 1.161.35 Torr.Based on the results of the coating study, an AlTi1 coating was found to be the most effective material coating. The coating consisted of amorphous particles with a size range of 10 nm to 20 nm The coating had a thickness of 23 µm, and the surface hardness was measured to be 474-523 mHv for the single-layer coating and 477-501 mHv for the multilayer coating. The materials in both single-layer and multilayer coating samples have the same hardness in ascending order: AlCr, AlTi2, AlTi1, with a Ti concentration rise from 0.7% to 3.7%. The impact of the Ti element is also crucial in increasing hardness, wear resistance, and roughness.
. 脉冲激光沉积(PLD)技术是一种物理气相沉积(PVD)技术。本研究是一系列PVD研究之一,旨在确定最佳PLD涂层,以最大限度地减少硬度为48±1 HRc的SKD61钢销的损伤。研究以SKD61的假块作为研究样品开始,然后是PVD-PLD,有三种涂层材料作为替代材料:Al/Cr (70:30), Al/Ti1(50:50)和Al/Ti2(63:37),都没有活性气体(N和C)。用于测试研究结果的程序是FESEM, SEM, XRF, EDS,维氏和洛氏显微硬度。实验在BRIN光子研究中心和PT AHM实验室进行。采用波长为1064 nm的Nd: YAG激光器,延时为180 s的q开关,脉冲能量为70 mJ,真空压力为1.161.35 Torr,整个PLD过程持续10分钟。根据涂层研究结果,发现AlTi1涂层是最有效的材料涂层。涂层由尺寸为10 ~ 20 nm的非晶颗粒组成,涂层厚度为23µm,单层涂层的表面硬度为474 ~ 523 mHv,多层涂层的表面硬度为477 ~ 501 mHv。单层和多层涂层样品中材料的硬度由高到低依次为AlCr、AlTi2、AlTi1, Ti浓度从0.7%升高到3.7%。钛元素的影响在提高硬度、耐磨性和粗糙度方面也至关重要。
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引用次数: 0
Returning the Earth’s Call: Overview of Centuries 回应地球的呼唤:几个世纪的概述
IF 2.8 4区 管理学 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2023-06-28 DOI: 10.14716/ijtech.v14i4.6542
Y. Whulanza, E. Kusrini
The first earth day was established in April 1970 as the UNESCO initiative to honor the Earth. Our history recorded a transformative way people lived and worked triggered by the industrial revolution started around 1850. This period reshaped the global economy, which has brought social and environmental changes ever since. Modern industry came in one package with a higher emission of greenhouse gases. The research from Our World in Data suggests that the annual emission of CO2 significantly indicated in early 1900 at around 5 billion tons. At the end of 19 century, the emission was 4-fold times and spiking these days to around 35 billion tons. Amstrong McKay et al. (Science vol. 377, 8811, 2022) warned that this CO2 emission contributes to the temperature rise, arctic surface decline, and sea level rise. Since 1970, the temperature has risen about 0.9C, according to the NASA global surface temperature report by 2021. The Arctic Sea ice has melted at about a rate of 13% decline per decade. Currently, the sea level has risen 12 centimeters higher per decade, according to CSIRO. A positive change is also evident in several actions taken after Earth Day 1970. The US Clean Air Act encourages the automotive industries to redefine their combustion technology. Although an increase of more than 37% of energy is utilized, the pollutants have decreased by about 78%, according to the EPA. New cars, trucks, and buses are 99% cleaner by utilizing today's tailpipe technology. The use of cleaner fuel, such as unleaded gasoline, has resulted in a 95% decrease in the level of lead in children's blood. In 1987, every country in words joined the Montreal Protocol to ban CFCs. Technology today allows us to reduce ozone-depleting emissions by up to 99%. According to the UN projections, by 2050, the ozone layer is expected to return to its 1980 level. The ozone layer has stabilized and started to recover, thereby preventing an estimated 2 million cases of skin cancer per year. In 2015, 197 countries have signed the Paris agreement which is the world's most ambitious effort to tackle climate change. All countries agreed to reduce carbon emission dramatically and to zero by 2050. Many efforts have been made to switch rapidly to renewables, conserve and restore forest and grassland, and protect coastal and ocean environments. The preservation of forests and wetlands will not only conserve biodiversity but also secure the carbon in trees and soil. Here, everyone has a role to play, including us as scientists, engineers, or civil society.
1970年4月,联合国教科文组织设立了第一个地球日,以纪念地球。我们的历史记录了1850年左右开始的工业革命引发的人们生活和工作方式的变革。这一时期重塑了全球经济,此后带来了社会和环境的变化。现代工业带来了更高的温室气体排放。《我们的世界数据》的研究表明,在1900年初,二氧化碳的年排放量显著显示在50亿吨左右。在19世纪末,排放量是原来的4倍,如今达到了350亿吨左右。armstrong McKay等人(Science vol. 377,8811,2022)警告说,二氧化碳的排放导致了气温上升、北极地表下降和海平面上升。根据NASA到2021年的全球地表温度报告,自1970年以来,温度上升了约0.9摄氏度。北极海冰以每十年13%的速度融化。根据CSIRO的数据,目前海平面每十年上升12厘米。在1970年地球日之后采取的一些行动中也有明显的积极变化。美国《清洁空气法》鼓励汽车工业重新定义其燃烧技术。根据美国环保署的数据,尽管能源利用率增加了37%以上,但污染物却减少了约78%。新汽车、卡车和公共汽车通过使用今天的排气管技术,清洁了99%。使用清洁燃料,如无铅汽油,使儿童血液中的铅含量降低了95%。1987年,所有国家都正式加入了禁止氟氯化碳的《蒙特利尔议定书》。今天的技术使我们能够将消耗臭氧层的排放物减少99%。根据联合国的预测,到2050年,臭氧层有望恢复到1980年的水平。臭氧层已经稳定并开始恢复,从而每年预防了大约200万例皮肤癌病例。2015年,197个国家签署了《巴黎协定》,这是世界上应对气候变化最雄心勃勃的努力。所有国家都同意大幅减少碳排放,到2050年实现零排放。在迅速转向可再生能源、保护和恢复森林和草原、保护沿海和海洋环境方面做出了许多努力。保护森林和湿地不仅可以保护生物多样性,还可以保护树木和土壤中的碳。在这里,每个人都可以发挥作用,包括我们这些科学家、工程师或公民社会。
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引用次数: 0
Study on the Application of Model-based Control Algorithm for a Suspended Cable-Driven Parallel Robot 基于模型控制算法在悬索驱动并联机器人中的应用研究
IF 2.8 4区 管理学 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2023-06-28 DOI: 10.14716/ijtech.v14i4.6458
B. Pramujati, A. Syamlan, Latifah Nurahmi, Mohamad Nasyir Tamara
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引用次数: 0
Ramie Fiber-Reinforced Polylactic-Acid Prepreg: Fabrication and Characterization of Unidirectional and Bidirectional Laminates 苎麻纤维增强聚乳酸预浸料:单向和双向层压板的制备与表征
IF 2.8 4区 管理学 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2023-06-28 DOI: 10.14716/ijtech.v14i4.5940
T. Soemardi, O. Polit, Fanya Salsabila, Ardy Lololau
. The fabrication of a natural prepreg with poly-lactic acid (PLA) matrix and ramie fiber reinforcement was engineered on a laboratory scale by impregnating the unidirectional and bidirectional ramie fiber with PLA matrix solvent on a glass die. The obtained composite prepreg has been stored at a very low temperature to maximize its shelf life. Tensile and biodegradability tests of the composite laminates prepared by the hot-pressing method have also been conducted. Tensile test results show that the freezer-stored bidirectional 0/90° prepreg laminate specimen has the highest tensile strength of 71.44 MPa with a modulus of 2.70 GPa on average. Meanwhile, the unstored bidirectional 0/90° prepreg laminate specimen has the highest level of elasticity, with a modulus of 1.29 GPa on average. The biodegradability test shows the decomposition process of the composite laminate under actual composting conditions. Microscopic observation of the damaged specimen results shows good adhesion between the PLA matrix and ramie fiber and the decomposition of the biodegradability test samples.
. 在实验室规模上,将聚乳酸(PLA)基体和苎麻纤维增强剂在玻璃模具上浸渍单向和双向苎麻纤维,制备了聚乳酸(PLA)基天然预浸料。所得到的复合预浸料在非常低的温度下储存,以最大限度地延长其保质期。对热压法制备的复合材料层压板进行了拉伸试验和生物降解试验。拉伸试验结果表明:冷库双向0/90°预浸层合板试样抗拉强度最高,为71.44 MPa,平均模量为2.70 GPa;同时,未储存的双向0/90°预浸层压试样的弹性水平最高,平均模量为1.29 GPa。生物降解性试验显示了复合层压板在实际堆肥条件下的分解过程。显微观察损伤试样结果表明,PLA基体与苎麻纤维粘附良好,降解性测试试样分解。
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引用次数: 0
Highly Efficient Technology for Making Bread Using an Ion-ozone Mixture 利用离子-臭氧混合物制作面包的高效技术
IF 2.8 4区 管理学 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2023-06-28 DOI: 10.14716/ijtech.v14i4.4242
A. Iztayev, Sholpan Tursunbayeva, S. Zhiyenbayeva, G. Iskakova, A. Matibayeva, Raushan Izteliyeva, M. Yakiyayeva
. The article examined the ways of using highly effective technologies for the development of whole-wheat flour bread. Ion-ozone cavitation technology is used, which allows time reduction for dough making and bread baking. The flour used in the experiment is of various kinds of low-quality wheat: non-class wheat, class III, class IV, and class V wheat . During the experiments, the amino acid composition of wheat was determined, which has a large impact on the quality of the test. To obtain a high-quality dough, wheat grains of various lower classes were treated with ion-ozone cavitation treatment. The treatment was carried out using a universal ion-ozone cavitation installation, producing both ozone and molecular ions from oxygen contained in atmospheric air and processed using overpressure of crops. The experiment result shows that the method of processing with ion-ozone cavitation technology allows the improvement of the rheological properties of the dough, the reduction of baking time by 2 times, and the improvement of the quality of bread from whole-ground low-quality soft wheat flour. The obtained bread products in comparison with the control sample had higher organoleptic indices; according to several physico-chemical and organoleptic indices, a sample of bread from whole-wheat wheat of class III appeared in a more favorable light.
。本文探讨了利用高效技术开发全麦面粉面包的途径。采用离子臭氧空化技术,缩短了面团制作和面包烘烤的时间。实验中使用的面粉是各种低质小麦:非类小麦、III类小麦、IV类小麦和V类小麦。在试验过程中,测定小麦的氨基酸组成,对检验质量有很大的影响。为获得高质量的面团,采用离子臭氧空化法制备了各种低档小麦颗粒。该处理使用通用离子臭氧空化装置进行,从大气中含有的氧气中产生臭氧和分子离子,并使用作物超压进行处理。实验结果表明,采用离子臭氧空化技术加工的方法可以改善面团的流变性能,将烘烤时间缩短2倍,提高低品质软面粉的面包品质。所得面包制品的感官指标高于对照;根据几种理化指标和感官指标,一种III类全麦面包样品表现出更有利的光。
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引用次数: 0
Factors Contributing to Delay of Interim Payment in Civil Engineering Projects 土木工程项目中期付款延迟的影响因素
IF 2.8 4区 管理学 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2023-06-28 DOI: 10.14716/ijtech.v14i4.3370
W. Ismail, H. Adnan, Wan Mohd Azmi, N. Yusop, S. S. M. Isa
. Delay of interim payment remains a chronic problem in the Malaysian construction industry and has relatively increased in number in recent years. Other than causing conflict among the contracting parties, the impacts it brings could shatter the entire delivery chain. Thus, the unfavorable contractual behavior of the client is a matter of great concern that should be addressed by all parties involved to ensure satisfactory project performance. However, research has revealed that the factor causing it is not solely because of the client's faults but also caused by other factors. Therefore, the purpose of this research is to determine the factors that lead to the occurrence of delay of interim payment in government-initiated civil engineering projects in Malaysia. The perceptions of civil engineer consultants and contractors were compared in relation to a list of factors derived from the literature review. The data were collected through an industry-wide questionnaire survey from 288 respondents. This research developed a list of 22 items that might influence the delay of interim payment based on four domains, namely project characteristics, quality of Standard Form of Contract (SFoC), external factors and participants and local attitude. The results found that the occurrence of delay of interim payment in civil engineering project is very high frequency. Correlation analysis performed revealed that the three major factors are positively correlated, namely project scope and design changes, ground uncertainty under the project characteristics domain, and bureaucracy in government agencies under the participants and local attitude domain. These results can help the project participants to better understand the relationship between the groups of factors and the delay of interim payment and encourage them to find solutions or implement mitigating actions to improve the outcomes of civil engineering project.
。中期付款延迟仍然是马来西亚建筑业的一个长期问题,近年来数量相对增加。它所带来的影响除了会在缔约方之间造成冲突外,还可能会破坏整个配送链。因此,客户的不利合同行为是一个非常值得关注的问题,所有相关方都应该解决这个问题,以确保令人满意的项目绩效。然而,研究表明,造成这种情况的因素并不仅仅是因为客户的错误,还有其他因素造成的。因此,本研究的目的是确定导致马来西亚政府发起的土木工程项目中出现中期付款延迟的因素。土木工程顾问和承包商的看法进行了比较,关系到从文献综述中得出的一系列因素。这些数据是通过对288名受访者进行全行业问卷调查收集的。本研究根据项目特征、标准合同格式(Standard Form of Contract, SFoC)质量、外部因素和参与者、当地态度四个领域,列出了可能影响中期付款延迟的22个项目。结果发现,土木工程项目中期付款拖欠的发生频率很高。相关分析显示,项目范围与设计变更、项目特征域下的地面不确定性、参与者与地方态度域下的政府机构官僚主义三个主要影响因素正相关。这些结果可以帮助项目参与者更好地了解因素组与中期付款延迟之间的关系,并鼓励他们寻找解决方案或实施缓解措施,以改善土木工程项目的结果。
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引用次数: 0
A Comparison of EFB to Ethanol Production by Integrating Between RBD Palm Oil and EFB Pulping Plant: An Assessment for Energy, Environmental and Economical Advantages RBD棕榈油与EFB制浆厂整合后EFB生产乙醇的比较:能源、环境和经济优势评价
IF 2.8 4区 管理学 Q2 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2023-06-28 DOI: 10.14716/ijtech.v14i4.6015
A. Setiawan, A. H. I. Putri, T. B. Bardant, R. Maryana, Y. Sudiyani, M. Muryanto, E. Triwahyuni, D. Dahnum, N. Rinaldi, Y. Irawan, T. Ahamed, R. Noguchi
. A comparative evaluation between two scenarios to utilize Empty Fruit Bunch (EFB) biomass residue for producing bioethanol was performed. The simulations included EFB-to Ethanol integrated into the Refined, Bleached & Deodorized (RBD) palm oil scenario as the first archetype and EFB-to-ethanol integrated with the pulping plant scenario as the second archetype. Literature reviews for each archetype were conducted to accomplish data for definitions, assumptions, and simulation analysis of each production stage. Ethanol production capacity was set at 255.55 kg as the basic calculation for mass and energy balances. The energy preference focused on energy efficiency and the environmental preference focused on consumed water and wastewater load. The simulation showed that excess energy from the Refined, Bleached & Deodorized Palm Oil (RBDPO) plant, which processes 5 tons of Fresh Fruit Bunch (FFB) equals to 82% of the required energy for producing 255.55 kg of ethanol. This required energy could also be supplied by excess energy from the combustion of 14.9 tons of dried black liquor in EFB pulping plant with 10.5 tons production capacity. The additional wastewater from the EFB-to-ethanol unit in the second archetype was only 2% of the wastewater from the EFB pulping plant with only a 5% increase in water consumption but it required a large production capacity. The first archetype could use 58.4% of the EFB waste. However, the required water increased from 5.3 m 3 to 20.88 m 3 for this archetype and required additional water treatment plant due to the different pollutant components from the additional installation units. The first archetype could gain additional income, which equals 18.5% of RBDPO sales. However, investment for integration of the first archetype was larger than the second archetype due to different types of additional installation units. Integration as in the second archetype required small modification and installation, with 2% additional income in 10.5 tons of pulp daily sales.
. 对利用空果束(EFB)生物质渣生产生物乙醇的两种方案进行了比较评价。模拟包括将EFB-to-乙醇集成到精炼、漂白和脱臭(RBD)棕榈油方案中作为第一个原型,将EFB-to-乙醇集成到制浆厂方案中作为第二个原型。对每个原型进行文献回顾,以完成每个生产阶段的定义、假设和模拟分析的数据。乙醇生产能力设定为255.55 kg,作为质量和能量平衡的基本计算。能源偏好侧重于能源效率,环境偏好侧重于消耗的水和废水负荷。模拟显示,加工5吨新鲜水果串(FFB)的精炼、漂白和脱臭棕榈油(RBDPO)工厂的多余能量相当于生产255.55公斤乙醇所需能量的82%。这一所需的能量也可以由生产能力为10.5吨的EFB制浆厂14.9吨干黑液燃烧产生的多余能量来提供。在第二个原型中,EFB制乙醇装置的额外废水仅为EFB制浆厂废水的2%,用水量仅增加5%,但它需要很大的生产能力。第一个原型可以使用58.4%的EFB废物。然而,该原型所需的水量从5.3立方米增加到20.88立方米,并且由于额外安装单元的不同污染物成分,需要额外的水处理厂。第一个原型可以获得额外收入,相当于RBDPO销售额的18.5%。然而,由于不同类型的附加安装单元,第一个原型的集成投资比第二个原型大。在第二个原型中,整合需要进行小的修改和安装,在每天10.5吨纸浆的销售中有2%的额外收入。
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International Journal of Technology Management
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