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All Journal Indonesian Journal of Chemistry JUITECH: Jurnal Ilmiah Fakultas Teknik Universitas Quality JURNAL AGROTEKNOSAINS
Darnianti Darnianti
Universitas Quality
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DECREASEMENT OF COLOUR AND COD CONTENT OF THE LIQUID WASTE PRODUCT FROM THE JEANS WASHING INDUSTRY BY CHITOSAN AND Trametes versicolor Rumondang Bulan; Mersi Suryani Sinaga; Darnianti Darnianti
Indonesian Journal of Chemistry Vol 10, No 1 (2010)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (194.955 KB) | DOI: 10.22146/ijc.21483

Abstract

Chitosan and Trametes versicolor were used as the material for processing liquid waste product from the jeans washing industry in this study as they were more economics and no negative damage in the environmental life. This research is to find out the chitosan and Trametes versicolor effect as the coagulant in decreasing the colour and the COD content of the liquid waste product from the jeans washing industry using the coagulation method and floculation. The dosage of chitosan and Trametes versicolor were 200, 400, 600, 800 and 1000 mg/L of the liquid waste product whereas the combination of chitosan and Trametes versicolor were 4:1, 3:2, 2:3 and 1:4. The data resulted from the analysis were shown as a graphics. The research results show that the optimum dosage of chitosan as coagulant was 800 mg/L which was able to decrease the colour intensity. For blue colour, the intensity decreased from 1.2 to 0.1%; the yellow colour intensity decreased from 0.9 to 0.0% and the COD 91.23%. The optimum dosage of Trametes versicolor of 600 mg/L was able to decrease the blue colour intensity from 1.2 to 0.11%; the yellow colour intensity from 0.9 to 0.1% and the COD was 91.37%. By using the combinationof chitosan and Trametes versicolor it was shown that the best result was using the 3:2 ratio which was able to decrease the blue colour intensity from 0.9 to 0.1% and the yellow colour intensity from 0.9 to 0.0% and the COD was 86.68%.
ANALISIS STRATEGI PEMASARAN CV KARUNIA MAKMUR PERSADA ( KMP ) DENGAN METODE SWOT Yusnia Sinambela; Darnianti Darnianti; Natanael Panjaitan
JUITECH: Jurnal Ilmiah Fakultas Teknik Universitas Quality Vol 2, No 2 (2018): Vol 2 No 2
Publisher : Universitas Quality

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36764/ju.v2i2.115

Abstract

This study aims to analyze strategies through strengths, weaknesses, opportunities, threats, to compile IFAS (Internal Factor Analysis Summary) and EFAS (External Factor Summary Analysis) and to find out marketing strategies in CV KMP after being analyzed by SWOT (Strengths, Weaknesses, Opportunities , Threaths). The conditions in the company in the face of fierce competition are marked by the increase of companies in the same field. This study identifies internal factors and external factors of the company. Data was collected through observation and division of questionnaires to workers totaling 20 people. The results of the study show the following values: (1) The results of IFAS analysis are 0.55 that the strategic position is in the average position, where the strongest factor in the company's internal is the guaranteed product quality and the building is the property. (2) EFAS analysis results obtained a score of 0.14 where this position is a middle position from the company's external factors, meaning that there are still many companies to optimize opportunities to minimize existing threats.
PREPARASI DAN KARAKTERISASI BIOMASSA KULIT PINANG DAN TEMPURUNG KELAPA MENJADI BRIKET DENGAN MENGGUNAKAN TEPUNG TAPIOKA SEBAGAI PEREKAT Erna Frida; Darnianti Darnianti; Jamal Pandia
JUITECH: Jurnal Ilmiah Fakultas Teknik Universitas Quality Vol 3, No 2 (2019): Vol 3 No 2
Publisher : Universitas Quality

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36764/ju.v3i2.252

Abstract

This study conducted the preparation and characterization of charcoal briquettes originating from areca nut skin biomass and coconut shell using tapioca flour as an adhesive. Stages of preparation are cleaning, carbonization, densification, and characterization. Characterize by measuring the level of water, dust, and bound carbon. The characterization results showed that the briquette's water content ranged from 4.1% - 6.9%, ash content was 2.4 - 5.8%, and carbon content was bound to 44% - 60.9%. This result is by SNI No.01-6235-2000. So it can be useful as an alternative fuel.
DAMPAK PEMBERIAN LARUTAN MIKRO ORGANISME LOKAL (MOL) PADA PERTUMBUHAN BUNGA KRISAN INODORUM (CHRYSANTHEMUM INODORUM) DI DESA SUMKARA KABANJAHE Darnianti Darnianti
JUITECH: Jurnal Ilmiah Fakultas Teknik Universitas Quality Vol 5, No 1 (2021): VOL 5 NO 1
Publisher : Universitas Quality

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36764/ju.v5i1.532

Abstract

Local microorganisms can be produced from plant or animal materials. Utilization of local microorganisms has the advantage of being relatively cheap in terms of cost and ease of application is an option that must be implemented by local farmers. The bacteria content in MOL can be used as a starter for composting, biological fertilizer. By using materials available in the environment. The aim of this study was to determine the application of local microorganism (MOL) vegetable MOL on growth and production applied to Inodrum Chrysanthemum cut flowers. Cultivation of cut flower types of Chrysanthemum Inodorum (Chrysanthemum Inodorum) is believed to be able to increase by utilizing local microorganisms (MOL) to maintain soil fertility, increase soil microbial population, maintain environmental sustainability as well as maintain and increase soil productivity (Setianingsih, 2009). This research was conducted in Sumkara Village, located in Karo District, North Sumatra, which is located between Berastagi and Kabanjahe. The community in Sumkara Village is one of the villages that earns an income from Chrysanthemum Inodrum (Chrysanthemum Inodorum) cut flowers. So far the Sumkara people still use chemical pesticides which can damage the soil structure. Many flower growers have complained about the high cost of fertilizers and maintenance for chrysanthemum cut flowers. This research will produce organic liquid fertilizer which is expected to improve soil structure. The focus of this research is the manufacture of MOL and its application for farmers in the Sumkara area. The method used was a completely randomized block design (RAKL). The results of this research will be published in the Accredited Journal indexed by Sinta.
THE EFFECT OF ADDITIONAL DRUGS OF Salted FISH AND MAS (Pomacea canaliculata Lamarck) ON INCREASING THE NUMBER OF QUEEN DUCK EGGS USING RAL METHOD Darnianti Darnianti
JUITECH: Jurnal Ilmiah Fakultas Teknik Universitas Quality Vol 6, No 1 (2022): Vol 6 No. 1 Tahun 2022
Publisher : Universitas Quality

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36764/ju.v6i1.741

Abstract

Ratu Duck is a hybrid duck, which is produced from crosses of MA (Mojosari x Alabio) ducks, which is one type of poultry that has the potential to produce eggs. Efforts to increase the egg production of queen ducks need to use the addition of egg-laying stimulants and feed that is high in protein. To meet protein requirements, gold snails are given as a source of high protein and breast milk fish pulp as a stimulant for laying eggs. This study aims to determine the effect of adding salted fish pulp and gold snails to the increase in the number of duck egg yields. Implemented in Brastagi, for 14 days. The research material included 10 queen ducks aged 24 weeks with an average body weight of 1490.61 ± 107.47 g. The experimental design used was a completely randomized design (CRD) with a unidirectional pattern with four treatments consisting of four replications, each replication consisting of five stimulant queen ducks consisting of salted fish dregs and gold snails. The treatments included P0 (salted fish pulp + 0% gold snail as a control), P1 (salted fish pulp + 3 % gold snail), P2 (salted fish pulp + 6% gold snail) and P3 (salted fish pulp + gold snail 9 %). The variables observed during the study included the number of eggs, egg color, egg white index, egg yolk index and egg yolk weight. ). The results of this research will be published in the Sinta indexed Accredited Journal.
DESAIN KURSI KULIAH DENGAN METODE BRAINSTORMING DI FAKULTAS TEKNIK UNIVERSITAS QUALITY MEDAN Darnianti Darnianti; Yusnia Sinambela
JUITECH: Jurnal Ilmiah Fakultas Teknik Universitas Quality Vol 2, No 2 (2018): Vol 2 No 2
Publisher : Universitas Quality

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36764/ju.v2i2.122

Abstract

The purpose of designing a lecture chair with additional functions is to provide comfort to students while wearing a lecture chair for a long time, ease in meeting the needs of the students. The lecture chairs are designed to suit the needs of the students, such as comfortable seating, board supplies for writing, bags and there is also a drinking area on the left. as well as for students to not bother holding their bags while writing and listening to lecturers teaching. The technique used in alternative development is through brainstorm. The use of this technique by collecting some input obtained from the students who had sat in the lecture chairs in the Department of Industrial Engineering Faculty of Engineering University of Quality. From the input obtained through brainstorming made a morphological map that is useful to choose the best alternative in designing a versatile lecture product.
PEMBUATAN ASAP CAIR DARI LIMBAH TONGKOL JAGUNG DENGAN METODE PIROLISIS YANG DIGUNAKAN SEBAGAI PENGAWET PADA IKAN Erna Frida; Darnianti Darnianti; Noviyunida Noviyunida
JUITECH: Jurnal Ilmiah Fakultas Teknik Universitas Quality Vol 2, No 1 (2018)
Publisher : Universitas Quality

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36764/ju.v2i1.97

Abstract

Corncob is one of the organic waste which so far still not used as a product that has added value. It turns out that corn cobs can be utilized into liquid smoke which is useful for environmentally friendly food preservatives. In this research, the raw material used is corncob waste as liquid smoke manufacture. The method used is pyrolysis method using pyrolysis reactor, by burning and heating on the furnace which will produce smoke and then it will be condensed (water vapor in the air condenses from gas form, back to liquid) into liquid smoke or liquid smoke. The result of rendeman characterization is 4.3-5%, liquid smoke pH 2.8-3.0 and liquid smoke test applied to mujair fish can survive for 20 days.
Karakterisasi Pot Organik dari Batang Kecombrang untuk Persemaian dengan menggunakan Tepung Tapioka sebagai Bahan Perekat (Adhesive) Erna Frida; Darnianti Darnianti; Vijai Aleksander Ginting
JUITECH: Jurnal Ilmiah Fakultas Teknik Universitas Quality Vol 4, No 1 (2020): VOL 4 NO 1
Publisher : Universitas Quality

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36764/ju.v4i1.344

Abstract

AbstrakTelah dilakukan pembuatan Pot Organik dengan menggunakan bahan Batang Kecombrang (Etlingera elatior) dan  Tepung Tapioka sebagai bahan perekat. Penelitian bertujuan untuk mendapatkan pot organik sebagai media persemaian untuk pengganti polybag berbahan dasar plastik. Penelitian dilakukan dengan menggunakan Metode Eksperimen dengan memvariasikan komposisi antara Batang Kecombrang dan Tepung Tapioka. Dari hasil penelitian diperoleh berat pot antara 800-820 gr, ketebalam pot organik diantara 3 - 4 cm, ketahanan pot organik terhadap tetesan air hujan dengan menggunakan batang kecombrang sebagai bahan dasar dengan energi kinetik maksimal   15,6x10-3 Joule dan kadar air pada pot organik dari batang kecombrang 31,52 – 32,63 % dengan tiga kali pengulangan. Pot organik yang dibuat dengan kombinasi  antara batang kecombrang dengan tepung tapioka baik digunakan sebagai media pembibitan tanaman. Abstract Organic Pot has been made by using Kecombrang (Etlingera elatior) and Tapioca Starch as an adhesive. The research aims to get organic pots as a nursery media to replace polybags made from plastic. The study was conducted using the Experimental Method by varying the composition between Kecombrang and Tapioca Starch. From the research results obtained pot weight between 800-820 gr, the thickness of organic pots between 3-4 cm, the resistance of organic pots to raindrops by using kecombrang stems as a base material with a maximum kinetic energy of 15.6x10-3 Joules and water content in the pot organic from stem kecombrang 31,52 - 32,63% with three repetitions. Organic pots made with a combination of kecombrang stems and tapioca flour are good as a medium for plant nurseries
RANCANGAN FASILITAS KERJA PADA STASIUN PENGAYAMAN KERANJANG BERDASARKAN ANALISIS POSTUR KERJA DENGAN METODE RULA (RAPID UPPER LIMB ASSESMENT) PADA UD. MAULANA BERASTAGI Darnianti Darnianti; AJIS SAMPURNO
JUITECH: Jurnal Ilmiah Fakultas Teknik Universitas Quality Vol 3, No 1 (2019): Vol 3 No 1
Publisher : Universitas Quality

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36764/ju.v3i1.171

Abstract

Problems arising in basket sacrificial stations that workers often complain or feel a complaint. This may occur in the long term which may cause injury to the worker. Rappid Upper Limb Assessment (RULA) is a method used to assess posture on the worker, covering the back, shoulders, neck, upper hand, and wrist. This method includes a quick identification of work attitudes that potentially lead to occupational accidents of concern of this method is the musculoskeletal system. The purpose of this research is to analyze the work posture on the workers in the weaving station. In the worker known that 12.41% said not sick, 37.25% said somewhat ill, 40.52% said ill, and stated very ill 9.8%. Another goal of the study was to identify postures that have Musculoskeletal injury risks. Based on the results of data processing, it is known that all work postures have a risk of injury.
EVALUASI TIANG BOREPILE DENGAN PIT TEST PADA PROYEK JAS – 2 BH 38 DI KABANJAHE Ronald Rezeki Tarigan; Darnianti Darnianti; Fiber Jeans Smara Laila; Jeremi Liliteo; Vernando W Vernando W
JUITECH: Jurnal Ilmiah Fakultas Teknik Universitas Quality Vol 7, No 1 (2023): Vol 7 No. 1 Tahun 2023
Publisher : Universitas Quality

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36764/ju.v7i1.1047

Abstract

Telah dilakukan pengujian integritas pondasi pada proyek pembangunan jembatan Kereta Api Araskabu Siantar (JAS-2). Pengujian pondasi dilakukan     dengan menggunakan alat Uji Pile Integrity Test (PIT) untuk memperoleh data-data dari lapangan, maka pengujian langsung dilakukan pada tiang pondasi  yang siap diuji dan data-data lainnya dilakukan koordinasi dengan beberapa pihak. Pengujian pondasi  dengan  Pile  Integrity  Test  dilakukan  untuk  mengetahui  ada  tidak kerusakan pondasi didalam tanah, dan mengetahui kedalaman pondasi yang sebenarnya dan mengetahui ada tidaknya pergumpalan beton didalam tanah. Penguian dilakukan pada 2 pilar dengan masing -masing pilar berjumlsh 24 tianng dengan kata lain, jumlah tiang yang diuji ada 48 tiang pondasi   dengan diameter tiang 80 cm dan kedalaman tiang rata-rata 19 m. 
Co-Authors AJIS SAMPURNO Daniel Maruli Tua Gultom Erna Frida Fiber Jeans Smara Laila Jamal Pandia Jeremi Liliteo juliana simbolon Marselius Butarbutar Mersi Suryani Sinaga Natanael Panjaitan Noviyunida Noviyunida Ronald Rezeki Tarigan Roy Sipayung Rumondang Bulan Vernando W Vernando W Vijai Aleksander Ginting Yusnia Sinambela