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All Journal International Journal of Renewable Energy Development Jurnal Teknik ITS IPTEK Journal of Proceedings Series Eksergi: Chemical Engineering Journal Jurnal IPTEK Konversi Jurnal Manajemen Aset Infrastruktur dan Fasilitas Jurnal Purifikasi Al-Ard: Jurnal Teknik Lingkungan International Journal Of Science, Technology & Management (IJSTM) Berkala Penelitian Hayati Journal of Social Research INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY
I.D.A.A Warmadewanthi
Departemen Teknik Lingkungan Institut Teknologi Sepuluh Nopember
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Social Sciences Transportation

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Journal : Jurnal Purifikasi

 1 
PENGARUH PENAMBAHAN NITROGEN dalam PRODUKSI BIOETANOL dari MOLASE TEBU dengan METODE SIMULTANEOUS SACCHARIFICATION and FERMENTATION (SSF) MENGGUNAKAN Saccharomyces cerevisiae IDAA Warmadewanthi; Muhammad Naufal
Purifikasi Vol 15 No 1 (2015): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Environmental and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25983806.v15.i1.24

Abstract

Molase adalah limbah tebu yang memiliki kandungan gula tinggi dan memiliki potensi untuk dijadikan sebagai bahan bakar seperti bioetanol. Pemanfaatan molase menjadi energi merupakan salah satu bentuk mewujudkan konsep bio-energy untu mewujudkan sistem lingkungan yang berkelanjutan. Pembuatan bioetanol dilakukan melalui teknik fermentasi. Penelitian ini dilakukan dengan membandingkan pengaruh penambahan nitrogen dan tanpa nitrogen pada media selama proses fermentasi molase tebu secara Simultaneous Sacharification and Fermentation (SSF). Proses hidrolisis molase tebu dilakukan secara biologis menggunakan Aspergillus niger. Sedangkan Poses fermentasi menggunakan isolat Saccharomyces cerevisiae. Dengan menggunakan metoda gas kromatografi didapatkan kadar bioetanol tertinggi pada pelakuan penambahan nitrogen dengan nilai 6,8% v/v sedangkan untuk perlakuan tanpa nitrogen memiliki kadar etanol tertinggi sebesar 4,5% v/v pada jam ke 72. Hal ini disebabkan karena nitrogen membantu meningkatkan aktivitas enzimatik mikroorganisme dalam proses konversi gula menjadi bioetanol.
STRATEGI PENGELOLAAN SAMPAH PERMUKIMAN DENGAN POLA PENDEKATAN KARAKTERISTIK KAWASAN (STUDI KASUS KECAMATAN CAKRANEGARA KOTA MATARAM) IDAA Warmadewanthi
Purifikasi Vol 6 No 2 (2005): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Environmental and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (256.509 KB) | DOI: 10.12962/j25983806.v6.i2.283

Abstract

At present the human settlement in Cakranegara has faced solid waste problem. The service provided by the Mataram Municipal Cleansing Agency has not been satisfying. This study applied descriptive-explorative approach. Evaluation was performed towards traditional, culture, and Hinduism concepts of the community who lived in the center of Cakranegara. Results of this study showed that tradition, culture and Hinduism concepts, which were used as a base in solid waste management in the district center, was Tri Hita Karana. This term means prosperity and harmony. From the social culture point of view, solid waste reduction and reuse programs could be accepted in order to keep a harmonious relationship between man and the environment. Assuming that the targets of public participation of 2%/year in the sources of solid waste and 10% in the Transfer Depot, solid waste reduction may achieve 46,99% within 5 years through recycling and compost production.
PENAMBAHAN INNOVATED MICROORGANISM FERTILIZER (IMF) DALAM PROSES KOMPOSTING AEROBIK IDAA Warmadewanthi; Bieby Voijant Tangahu
Purifikasi Vol 5 No 1 (2004): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Environmental and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (206.095 KB) | DOI: 10.12962/j25983806.v5.i1.298

Abstract

This research with adding IMF (Innovated Microorganism Fertilizer) to accelerate a compost maturation process and influence to the compost quality. This research used an anaerobic composting with windrow composting system. The variation of IMF are 0.6, 1.2, 2 and 2.5 L/kg of waste with one control reactor. The parameter used: humidity, temperature, pH, and C/N ratio. The N, P and K was analysed to identify final quality compost. The result show, the optimum dosage was 1.2 L/kg of solid waste with time composting ± 2 weeks. A good result of compost quality from the percentage of N, P and K which valued at 3.14, 0.8 and 1.5.
PENGARUH VARIASI OKSIGEN TERHADAP LAJU KEMATANGAN KOMPOS IDAA Warmadewanthi
Purifikasi Vol 4 No 1 (2003): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Environmental and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (184.733 KB) | DOI: 10.12962/j25983806.v4.i1.348

Abstract

Rotatable reactors were used in this experiment. Oxygen was continously supplied into the reactors until the compost was mature. Using a motor, the rectors were rotated daily at a speed of 1.5 rpm for 5 revolutions. Domestic waste sludge was added to the reactor to have an initial C/N ratio of 30. The sludge was mixed with the compost before being inserted to the reactors. The results showed that oxygen of 9.07-114.4 l/kg.day was required in order a mature compost within 7 days. This was proved by having a C/N ratio of < 20 and stable temperature. The compost quality was adequate as shown by the pH of 6-8.5 with N concentration of 2.2-2.5%, P of 0.21% and K of 0.34%.
KAJIAN ASPEK LINGKUNGAN ALTERNATIF LOKASI UNTUK REPLACEMENT PABRIK III-B PT. PUSRI IDAA Warmadewanthi
Purifikasi Vol 20 No 2 (2021): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Planning, and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25983806.v20.i2.412

Abstract

As a pioneer of urea fertilizer producer in Indonesia, PT. PUSRI is committed to realizing a sustainable fertilizer industry. Currently, PT. PUSRI has several problems which are 25% higher natural gas consumption due to the over 43 years old factory, increased investment and operational costs for old factory equipment, and spare parts that are expensive and difficult to source. For more efficient operation, PT. PUSRI plans to replace the plant and proposing 3 alternative locations, they are IA and IB on the East and West Sides of the Tanjung Api-Api area, and location II that is located in the PT. PUSRI area. To determine the most prospective location, each location needs environmental assessment. This study is using the SWOT analysis which will then be scored to show quantitative results. The results of the Strength analysis show that location II has a better score since it has a buffer zone as well as flora and fauna conservation. In the Weakness analysis, the IA and IB locations have shortcomings such as the inadequate raw water treatment technology. Location II has a disadvantage because it does not have domestic and industrial wastewater treatment technology. The results of the Opportunity analysis for IA and IB locations are considered to have more opportunities compared to location II. For Threat analysis, locations IA and IB are considered to have more challenges. One of which is the water body capacity to accept waste loads.
Co-Authors Abd. Rasyid Syamsuri Abdul Kahar Adi Soeprijanto Adi, Trijoko Wahyu Adiputra, I Komang Hotra Arino Anzip Arna Puji Rakhmawati Atmaja, Sang Kompiang Rizki Putra Atthaya Namira Yulianto, Khenza Aulia Rodlia Fitriana Biantara, I Wayan Arya Bieby Voijant Tangahu Cokorda Agung Wahyu Purnamasidhi Eko Sunarto I Dewa Made Sukrama Jerry Joni Hermana Junia Istingadah Junior, Darren Kadek Diana Harmayani Komang Ayu Witarini Lailatun Nikmah Maisyah, Siti Marlena Marlena Martha Lumban Gaol Muhammad Naufal Muthmainnah, Melania Suweni Muntini Putu Tantri Kumala Sari Renia Setyo Utami Ria A.A Soemitro Shanti, Dewa Ayu Fony Prema Siti Mushlihah Sulfahri Sulfahri Sulistiya Nengse Susilawathi, Ni Made Talent Nia Pramestyawati Weisnawa, I Gede Purna Widya Prihesti Iswarani Wulandari, Putu Kintan Yustika Aristya Widyasari