Hasil Pencarian  ::  Simpan CSV :: Kembali

"Energy and sustainability are critical factors for economic development, and this comprehensive reference provides a detailed overview and fundamental analysis of sustainability issues associated with the aluminum industry. This publication brings together articles on the concepts and application of life-cycle assessments that benchmark aluminum-industry efforts towards sustainable development. Chapters provide energy-use data for primary and secondary aluminum production and processing along with future energy saving opportunities in aluminum processing. Life-cycle assessments provide basic, factual, information on the modeling of material flow in the industry, its products, and most importantly energy savings involved with recycling. Coverage includes various scrap sorting technologies and the positive impact of lightweight aluminum in transportation and infrastructure."

"Because lithium is the least dense elemental metal, materials scientists and engineers have been working for decades to develop a commercially viable aluminum-lithium (Al-Li) alloy that would be even lighter and stiffer than other aluminum alloys. The first two generations of Al-Li alloys tended to suffer from several problems, including poor ductility and fracture toughness; unreliable properties, fatigue and fracture resistance; and unreliable corrosion resistance.Now, new third generation Al-Li alloys with significantly reduced lithium content and other improvements are promising a revival for Al-Li applications in modern aircraft and aerospace vehicles. Over the last few years, these newer Al-Li alloys have attracted increasing global interest for widespread applications in the aerospace industry largely because of soaring fuel costs and the development of a new generation of civil and military aircraft. This contributed book, featuring many of the top researchers in the field, is the first up-to-date international reference for Al-Li material research, alloy development, structural design and aerospace systems engineering."

"Written by leading experts in a range of related fields, this book covers biomimetics, environmentally friendly lubrication, tribology of wind turbines and renewable sources of energy, and ecological impact of new technologies of surface treatment. "

"The importance of conservation is growing each year, with increasing concerns over the destruction of biodiversity and the rising awareness of ecosystem services generating new debates on the human-nature relationship. This compact overview integrates the process, theory and practice of conservation for a broad readership, from students to practitioners. Taking a global perspective, it uses examples from around the world to show how general themes, patterns and drivers acting at different scales come together to cause problems at the local level"-- Provided by publisher."

"PT X merupakaan perusahaan penetasan telur ayam yang menerapkan sistem daur ulang air limbah untuk mengurangi pengambilan air tanah dan pembuangan air limbah. Sistem daur ulang air limbah yang berkelanjutan harus layak secara teknologi, ekonomi dan sosial. Namun masalah dalam penelitian ini adalah ketiadaan informasi kelayakan dan strategi pengembangannya. Tujuan dari penelitian ini adalah mengevaluasi keberlanjutan penerapan sistem daur ulang air limbah di PT X dan merumuskan strategi pengembangannya. Metode penelitian yang digunakan diantaranya mengevaluasi efisiensi penggunaan air tanah, penurunan konsentrasi pencemar air limbah, analisis biaya manfaat, analisa persepsi & tingkat pengetahuan masyarakat kemudian pengembangan strategi dengan metode SWOT. Hasil penelitian menunjukkan sistem daur ulang air limbah mampu meningkatkan efisiensi penggunaan air tanah secara rata-rata sebesar 30,18%, performa penurunan konsentrasi pencemar untuk parameter BOD5, COD, TSS, Minyak dan lemak diatas 70% dan mampu memenuhi baku mutu yang diharapkan, dan memiliki kelayakan ekonomi dengan nilai NPV positif dan BCR>1. Selain itu mayoritas masyarakat sekitar perusahaan memiliki pengetahuan lingkungan lebih dari cukup dan perspektif positif terhadap daur ulang air limbah PT X. Strategi peningkatan kekuatan & peluang cocok diterapkan untuk pengembangan berkelanjutan. Secara umum daur ulang air limbah layak diterapkan dalam industri sejenis. Kesimpulan dari penelitian ini adalah sistem daur ulang air limbah yang diterapkan PT X memiliki kelayakan teknologi, ekonomi dan sosial dan dapat dikembangkan melalui peningkatan teknologi daur ulang air limbah dan pemanfaatan peluang eksternal

---

PT X is a poultry hatchery company that implements a wastewater recycling system to reduce groundwater extraction and wastewater disposal. The sustainable wastewater recycling system must be technologically, economically, and socially feasible. However, the problem in this research is the lack of feasibility information and development strategies. The objective of this research is to evaluate the sustainability of implementing the wastewater recycling system at PT X and formulate development strategies. Research methods include evaluating the efficiency of groundwater use, reducing pollutant concentrations in wastewater, cost-benefit analysis, analyzing community perceptions and knowledge levels, and developing strategies using the SWOT method. The research results indicate that the wastewater recycling system can improve the efficiency of groundwater use by an average of 30.18%. The performance in reducing pollutant concentrations for parameters such as BOD5, COD, TSS, oil, and fat is above 70%, meeting the expected quality standards. It is economically viable with a positive NPV and BCR > 1. Additionally, the majority of the community around the company has sufficient environmental knowledge and a positive perspective on PT X's wastewater recycling. Strengthening internal strengths and capitalizing on external opportunities are suitable strategies for sustainable development. In conclusions, wastewater recycling is feasible for similar industries. The conclusion of this research is that PT X's implemented wastewater recycling system is technologically, economically, and socially feasible and can be developed through improved wastewater recycling technology and leveraging external opportunities."

"Sampah plastik yang tidak memiliki kualitas dan nilai ekonomi yang memadai untuk diproses kembali pada akhir siklus hidupnya dapat mempengaruhi tingkat daur ulang plastik dari aspek ketersediaan bahan baku. Selain itu, keterbatasan bahan baku produksi yang berkualitas dapat menyebabkan pabrik untuk mendaur ulang sampah dengan nilai ekonomi yang lebih rendah dan pada akhirnya dapat mempengaruhi tingkat keuntungan dan keberlanjutan ekonomi pabrik daur ulang plastik menjadi biji plastik. Riset ini bertujuan untuk membuktikan dampak implementasi prinsip desain Konservasi Nilai Material (MVC) pada kemasan plastik fleksibel terhadap keberlanjutan ekonomi pabrik daur ulang plastik dan dampaknya terhadap keberlanjutan lingkungan dan sosial. Ditemukan bahwa penerapan berulang prinsip MVC pada kemasan plastik dapat meningkatkan keberlanjutan ekonomi pabrik daur ulang melalui peningkatan pendapatan dan kelayakan bisnis yang dianalisis menggunakan metode studi kelayakan. Peningkatan margin dinilai melalui peningkatan ketersediaan sampah plastik yang memiliki nilai ekonomi dan kualitas yang baik untuk terus diproduksi sebagai bahan daur ulang. Kemudian, dampaknya terhadap keberlanjutan lingkungan melalui pengurangan ekstraksi bahan baku tidak terbarukan untuk keperluan produksi plastik asli, meminimalisir dampak pencemaran lingkungan dan lahan yang tidak produktif akibat akumulasi penumpukan sampah, dan mengurangi jumlah dan dampak sampah plastik yang dibuang langsung ke laut. Lebih lanjut, dampaknya terhadap keberlanjutan sosial melalui peningkatan penyerapan lapangan kerja dan pendapatan masyarakat lokal.

---

Plastic waste that has inadequate quality and economic value at its end of life may affect the plastic recyclers production rate in the raw material aspect. Moreover, limited availability of good raw materials lead the recycling plant to recycle low economic value of waste which may affect the producers profit margin and its economic sustainability factor which produce plastic pellets as its end product. This research aims to prove the impact of material value conservation (MVC) design principle implementation on the flexible plastic packaging on the economic sustainability of plastic recycling plants and the impact on the sustainable environmental and social. It is found that the repetitive implementation of MVC design principles on plastic packaging may increase the economic sustainability of recycling plants through increasing income, which analyzed using feasibility study method. The increased margin was assessed through the increasing availability of good quality of plastic waste to be produced continuously. The impact on environmental sustainability through the reduction of extraction of non-renewable raw materials to produce plastic original, pollution and unproductive land due to waste accumulation, and reduce the amount of plastic waste thrown directly into the ocean. Meanwhile, the impact on social sustainability obtained through increasing employment absorption and earnings of local communities."

"Designed for use by practicing engineers, and maintenance and operating personnel, who are concerned with the problem of corrosion of aluminum in their daily job functions. DLC: Aluminum--Corrosion."

"Paradigma lama mengenai disain produk hanya untuk memenuhi aspek fungsional masih menjadi hambatan dalam upaya konservasi nilai material produk dalam konteks daur ulang material, terutama logam. Riset ini mengambil contoh pada disain tabung Alat Pemadam Api Ringan APAR untuk dievaluasi berdasarkan kriteria-kriteria disain untuk konservasi nilai material logam. Hasil evaluasi disain produk yang ada menunjukkan bahwa sedikitnya 70.25 memenuhi kriteria. Oleh karena itu, alternatif disain ulang diajukan untuk meningkatkan kemudahan dalam rangka percepatan proses pelepasan dan pemisahan material produk. Berdasarkan hasil disain ulang produk APAR, terdapat potensi pengurangan waktu dan biaya pelepasan hingga 77.02.

---

Old paradigm on product design that solely for meeting functional aspect purpose remains to be a constraint to material value conservation efforts in the context of material recycling, particularly metal. This research uses a sample of portable fire extinguisher design to be evaluated based on criterion of design for metal material value conservation. As a result of the evaluation, the current product design is at least 70.25 meet the criterion. Therefore, re design alternative is proposed to facilitate acceleration of product disassembly and material separation process. Finally, the re design of portable fire extinguisher indicates disassembly time and cost reduction potential up to 77.02."

"ABSTRAKPolipropilena sering dijadikan berbagai macam kebutuhan seperti kemasan, tali, komponen otomotif dan lain sebagainya. Dalam hal ini polipropilena yang dijadikan sebagai kemasan dapat dilakukan proses daur ulang. Sejauh ini masih belum ada bukti mengenai penurunan kekuatan daur ulang sampai sejauh mana. Penelitian ini ingin mencari tahu sampai dimana plastik tersebut tidak mengalami perubahan yang signifikan melalui paradigma material value conservation. Dengan melihat nilai kekuatan dari pengujian tarik, perubahan densitasnya dan perubahan fisiknya warna . Dalam penelitian ini dilakukan daur ulang polipropilena dengan proses satu kali, dua kali, empat kali dan delapan kali. Pada uji tarik dan modulus tidak mengalami perubahan yang signifikan, sedangkan untuk nilai dari elongasi bertambah. Untuk densitas tidak mengalami perubahan. Perubahan paling besar terdapat pada perubahan warna produk, dimana makin banyak daur ulang akan semakin gelap. Berdasarkan paradigma material value conservation, pada daur ulang ke delapan kali nilainya sudah sangat berkurang walaupun nilai kualitas dari material tersebut tetap baik, namun dari sisi nilai harga, material tersebut telah mengalami penurunan harga yang signifikan berdasarkan info yang berlaku saat ini. Sehingga secara fungsional kemasan masih dapat digunakan sampai delapan kali daur ulang.

---

ABSTRACTPolypropylene has been used in various needs such as packaging, rope, automotive components and so forth. In this case, the polypropylene used as packaging can be recycled. Until now, there is still no evidence of a decrease in recycling strength. This research wanted to know how much the plastic recycling didn rsquo t change significantly through the paradigm of material value conservation. By doing tensile strength and density test also physical changes color of polypropylene.In this research, polypropylene recycling was processed once, twice, four times and eight times. There is no different significant value for tensile test and modulus but for elongation value has increased after recycling eight times. For density, value remains the same from one times to eight times recycling. The big changes of this experiment in color changes, more recycled the color become darker.Based on Material Value Conservation paradigm, in eight times recycling the value has decreased although the value of quality still good. Due to the polypropylene has decreased in price based on current info. So that, the functional of plastic packaging still usable up to eight times recycled. "