The heat island phenomenon in major cities is partly due to the excessive use of concrete and brick, which causes many problems regarding thermal comfort energy expenditure. behaviour envelope wall material depends on its density, capacity, conductivity, effect intensity (HII) reported this paper. Experiments simulations were carried out four most popular building materials: aerated concrete, wood with glass-wool insulation, glass fibre-reinforced each having a dimension 1 m × m. analyse...

Abstract Rice husk conversion to silica is usually carried out through combustion produce ash and then continued with extraction obtain silica. There a model simulate the single-particle combustion, which abandoned simplification. However, complex seems complicated for early beginners. This study, hence, aims discuss simple mass transfer simulation using heterogeneous reaction approach. The shrinking core was targeted rice time prediction, whereas effectiveness analysis used in simulation....

Update On October 17, 2017, this article was updated from its original format to make use of newer inline video display technology. In the online version article, videos can now be accessed where they are cited in text, thereby enhancing user experience. The text has been altered slightly change phrase "the accompanying files" an in-text reference each video. Background: Knot holding strength is essential maintain wound closure and ensure tissue contact for healing. unraveling lead severe...

Oil spills in the marine environment are a rising concern due to their adverse impacts on living creatures and environment. Hence, remediation methods have been used remove oil from contaminated water. A sorbent material is considered best method for spill absorption. However, commonly commercial sorbents made nonrenewable nonenvironmentally friendly materials. In this research, natural rubber foam (NRF) was as with addition of filler, i.e., silica silica–lignin hybrid, increase its sorption...

Bioplastic has been widely studied in the past decades as a replacement for non-biodegradable and non-environmentally friendly plastic. One of promising materials to produce bioplastic is cellulose. However, it rarely used main component production. This study reports facile process prepare using pure cellulose content Cladophora sp. algae via hydrogel method. The effect epichlorohydrin (ECH) concentrations cross-linking agent was investigated toward biodegradability, thermal, mechanical...

The purpose of this report was to compare the numerical analysis for different cooling efficiency a cable tunnel system when installing one additional trough or three troughs circuit 100% 70% heat load. Cable is widely known it use high voltage transmission in an underground. Due cables generating large quantities heat, water pipes and air ventilation were used cool down cable. To investigate tunnel, research benchmark case carried out. A Computational Fluid Dynamic (CFD) about 2D natural...

Termoplastik poliuretan (TPU) merupakan salah satu jenis polimer termoplastik yang saat ini sangat menarik perhatian pengguna mesin pencetakan 3D. Filamen TPU memiliki sifat elastis, kekuatan tarik dan ketahanan terhadap benturan baik sehingga potensial untuk digunakan dalam proses pembuatan produk pada berbagai aplikasi. Walaupun demikian, dikarenakan elastisnya, dinilai cukup sulit perlu dilakukan kajian mengidentifikasi kecepatan cetak, retraksi, temperatur jarak retraksi optimum mencetak...

Abstract Microalgae have been extensively studied as a potentially sustainable biomass resource. However, its cultivating and harvesting system faces many challenges due to the low cell density of microalgae. Recently, membrane technology in microalgae cultivation is believed improve CO 2 gas-liquid mass transfer. It could generate more uniform microbubbles prolong gas retention time culture solution. This study used submerged photobioreactor (SMPBR) based on hydrophobic polypropylene...

The rapid growth of the electronics industry is producing excessive electronic waste. One common types materials in waste high-impact polystyrene (HIPS). In this study, HIPS from was recycled through an extrusion process and used as a 3D print filament. effects recycling on printability, physical properties, mechanical properties horizontal vertical directions were examined. It found that until fourth-cycle, such tensile strength, flexural impact strength comparable with virgin commercial...

Coffee pulp waste was having potential to be used as a source of non-wood cellulose for papermaking because its abundance, considerable fraction content, and low economic value. In this study, the isolated cellulosic fiber from coffee prepared into paper with specific purpose filter coffee, aim an effort develop value alternative utilization reduce environmental impact accumulation, besides suggesting paper. The effect extraction process repetition using 3 % (w/w) sodium hydroxide studied...

Packaging plastic is the largest contributor to pollution in environment. Nowadays, development of environmentally friendly packaging materials a necessity. Cellulose naturally occurred polymer that has potential as raw material manufacture packaging. most abundant natural world which also renewable. excellent tensile strength, good water resistance and biodegradable. One problems on utilization cellulose it brittle difficult process. Starch another considered suitable material. easier...

In this study, Sansevieria trifasciata fibers were treated by NaOH with concentration 1%,3%, and 5wt% at 100°C for 2 hours. Chesson-Datta methods was used to determine the lignocellulose content of raw sansevieria investigate effect alkali treatment on lignin fiber. Mechanical properties thermal untreated measured means tensile testing machine thermogravimetric analysis (TGA).The cellulose contents fiber obtained from method 56% 6% respectively. showed increase strength 647 MPa 902 fibers....

Ponding system is generally used for microalgae cultivation. However, selection of appropriate technology the harvesting process challenging due to low cell density cultivated from ponding and large volume water be handled. One promising technologies ultrafiltration (UF). In this study, performance UF during in a lab- full-scale test investigated. The performances both scales are compared analyzed provide an understanding several aspects which affect yield produced lab actual conditions....

In the management of infrastructure building, during period buildings common building damage as a result several reasons, earthquakes are common. The is planned to work for certain service life. But life, vulnerable due various things. Any cultivate can be detected early possible, because could spread, triggering and exacerbating latest. newest concept earthquake engineering Performance Based Earthquake Engineering (PBEE). PBEE divided into two, namely Seismic Design (PBSD) Evaluation...

Usaha Mikro Kecil dan Menengah (UMKM) di Indonesia menyumbang 61.97 persen PDB negara. Namun,keselamatan kesehatan kerja (K3) masih banyak belum diterapkan para pemilik pekerja UMKM diIndonesia. Ketidakpedulian kurangnya informasi terkait K3, menyebabkan tingginya risiko kecelakaandalam ketidaknyamanan dalam bekerja. Oleh karena itu, tim penulis melakukan sosialisasi manajemenrisiko bisnis K3 ke UMKM, dengan menggunakan metode penelitian observasi wawancara TokoAneka Karya Kusen Kota Batam....

Abstract The evaluation of MASARO plastic refinery unit and maggots waste processing strategies’ efficacy, environmental impact, economic analysis is at the center issue formulation in this study. Waste through requires incinerators, pyrolysis, wet scrubber units. On other side, are used because their capacity to swiftly degrade without negative impacts on environment. reduction a parameter that can be measure performance processing. percentages achieved by using surpass 90% whereas range...

Abstract Indonesia’s food security compels the government to develop and land intensification as a long-term national program. It cannot be denied that productivity is closely related fertilizer demand considering Indonesia an agricultural country. However, date, 86.5% of Indonesian farmers rely on synthetic fertilizers which are adverse environment. On other hand, 2 nd largest waste producer most them still unprocessed. Therefore, practical solution overcome this problem offer application...