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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 International Journal Of Science, Technology & Management (IJSTM) Berkala Penelitian Hayati

I.D.A.A Warmadewanthi

Departemen Teknik Lingkungan Institut Teknologi Sepuluh Nopember

Author-ID : 412975

Aerospace Engineering Agriculture, Biological Sciences & Forestry 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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EFFECT OF pH ON LIQUID-PHASE MASS TRANSFER AND DIFFUSIVITY COEFFICIENT AT LEACHATE TREATMENT OF MUNICIPAL WASTE LANDFILL IN ANAEROBIC BIOREACTOR Abdul Kahar; IDAA Warmadewanthi; Joni Hermana
Eksergi Vol 15, No 2 (2018): Vol. 15 No.2 (2018)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v15i2.2327

Leachate is a liquid waste resulted from physical, biological and chemical decomposition of landfill waste. Leachate contains complex dissolved organic and anorganic substrate which are biodegradable and non-biodegradable. Anaerobic treatment principally utilizes anaerobic bacteria in order to degrade the dissolved organic substance into biogas. Anaerobic treatment is very sensitive towards the substrate cocentration, temperature, and pH. This research used anaerobic bioreactor with the volume of 160 L, the ratio of the leachate: biogas is 70:30. Seeding and acclimatization steps were done, respectively for 10 days, leachate treatment was done in 21 days. Seeding, acclimatization, and leachate treatment were done on the pH ambience of 7.2 and 8.0 and ambient temperature. COD and VFA analysis were done every two days. The objective of this research is to decide the pH effect on the coefficient of liquid-phase mass transfer: kL, and the diffusivity of the dissolved substace, DL. pH affects the degradation of the concentratio of dissolved organic substrate in the leachate. The higher the pH is, the higher the obtained VFA concentration is. VFA concentration is affected by pH; however, it still considers the optimal pH condition of the substrate biodegradation. pH affects the average rate of mass transfer, rkL and diffusivity of the dissolved substance, DL in the anaerobic treatment of leachate. pH affect the concentration of dissolved organic substrate which subsequently influenes the coefficient of liquid-phase mass transfer of the leachate, kL and the diffusivity of the dissolved substance, DL. The higher the pH is, the more increasing the kL is and the more decreasing the DL is.

Non Residential Solid Waste Reduction in Krembangan District, North Surabaya Talent Nia Pramestyawati; I. D. A. A. Warmadewanthi
Jurnal IPTEK Vol 24, No 2 (2020)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2020.v24i2.967

Reduction of non-residential solid waste is important because it can reduce the generation of solid waste in Benowo Landfill. Krembangan District is one of the districts in North Surabaya that was chosen as a research area however, there is no data about the existing and reduction potential of non-residential solid waste in Krembangan District. The purposes of this research are the identification of existing and reduction potential of non-residential solid waste in Krembangan District. There are 21 samples for this research. Public facility samples contain education facilities, offices, worship places, commercial places, medical centres and street sweeping. Total generation of solid waste from public facilities is 10.179,74 kg/day. Existing reduction of solid waste in source and transfer station are 158,1 kg/day and 472,53 kg/day. The reduction potential of non-residential solid waste is based on the optimal recovery factor. Reduction potential with composting and recycling activities are 3.668,31 kg/day and 694,67 kg/day.

EFFECTS OF TEMPERATURE-pH ON LIQUID PHASE MASS TRANSFER AND DIFFUSION COEFFICIENTS AT LEACHATE TREATMENT IN ANAEROBIC BIOREACTOR Abdul Kahar; IDAA Warmadewanthi; Joni Hermana
Konversi Vol 7, No 2 (2018): Oktober 2018
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v7i2.6501

Abstract - Leachate contains complex dissolved organic and inorganic substrates that are biodegradable and non-biodegradable. Principally, anaerobic treatment utilizes anaerobic bacteria to degrade the dissolved organic matters. Anaerobic treatment is very sensitive towards the change of temperature and pH. This research used an anaerobic bioreactor with volume of 160L, with a ratio of leachate:biogas was 70:30. Seeding, acclimatization and leachate treatment were executed at temperature 35°C; pH ambient, temperature 45°C; pH ambient, temperature 35°C; pH 7.2 and temperature 45°C; pH 8.0. Based on this research, that there is dependency on mass of solutes organic substrate (COD) in the leachate, at all operating conditions of leachate treatment in anaerobic bioreactor. Hence, the organic substrate concentration (COD) will affect the VFA, the liquid phase mass transfer and diffusion of solute organic. Consequently, the higher the temperature-pH, the higher the liquid-phase mass transfer, but lower diffusion coefficients is. Keywords: anaerobic bioreactor, diffusion, leachate, liquid-phase mass transfer

Waste Management Analysis at Tps 3R Mandiri Sejahtera Singosari Malang Arna Puji Rakhmawati; Ria A.A Soemitro; I.D.A.A Warmadewanthi
IPTEK Journal of Proceedings Series No 1 (2017): The 2nd International Conference on Civil Engineering Research (ICCER) 2016
Publisher : Institut Teknologi Sepuluh Nopember

TPS 3R Mandiri Sejahtera using reduce, reuse, and recycle principles are established by government to solve the problems of wastes in the area of the district of Singosari, Malang. According to the monitoring and evaluation processes conducted by the Directorate General of Human Settlements, Ministry of Public Works and Public Housing in 2013, it shown that there were several things at the waste management at TPS 3R had been not in accordance with the Guidelines of waste management of Directorate General of Human Settlement. This research aimed to analysis waste management at TPS 3R Mandiri Sejahtera in order to optimize the waste management. This research using descriptive Analysis. The research result showed that the function of existing waste management condition was poor, with score is 167. The result indicated that by optimizing the service up to 3% in every year until 2021, the management of TPS 3R needed to add one tricycle, eight workers for separating waste and one worker for transporting waste and to enlarge the area up to 146 m2 from 578 m2 of current area. The potential optimization processes can be conducted by increasing the coverage of services by 44.81%, the amount of waste which could be transported is 22,30 m3/day.

Evaluasi Kinerja Aset Tempat Pengolahan Sampah Terpadu (TPST) di Kabupaten Sidoarjo Marlena Marlena; Tri Joko Wahyu Adi; I.D.A.A. Warmadewanthi
Jurnal Manajemen Aset Infrastruktur & Fasilitas Vol 4, No 3 (2020): Jurnal Manajemen Aset Infrastruktur & Fasilitas
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Perkembangan Kabupaten Sidoarjo sebagai pusat pertumbuhan membawa dampak terhadap peningkatan jumlah penduduk sehingga berpengaruh terhadap jumlah timbulan sampah yang dihasilkan. Salah satu upaya yang dilakukan pemerintah Kabupaten Sidoarjo untuk mengurangi jumlah timbulan sampah yang masuk ke TPA adalah dengan membangun infrastruktur pengelolaan sampah berupa Tempat Pengolahan Sampah Terpadu (TPST). TPST yang telah dibangun ini perlu menerapkan manajemen aset yang tepat sehingga dapat berjalan secara efektif dan berkelanjutan. Saat ini, masih terdapat TPST yang belum berfungsi optimal salah satunya dikarenakan belum terpenuhi sarana dan prasarana. Tujuan dalam penelitian ini adalah untuk melakukan evaluasi terhadap kinerja aset TPST di Kabupaten Sidoarjo. Metode penelitian yang digunakan adalah analisa deskriptif yaitu menggambarkan suatu data yang terkait pengelolaan aset TPST di Kabupaten Sidoarjo. Pengumpulan data berupa data primer dan data sekunder. Data primer diperoleh melalui observasi lapangan secara langsung dan hasil wawancara, sedangkan data sekunder diperoleh dari hasil studi literatur dan data – data dari instansi terkait. Hasil analisa tersebut memberikan gambaran bahwa kondisi TPST di Kabupaten Sidoarjo masih perlu peningkatan kinerja aset dan pengadaan aset baru. Selain itu juga, perlunya peningkatan kegiatan operasional dan pemeliharaan pengelolaan persampahan agar program TPST berjalan dengan optimal dan dalam rangka berkelanjutan TPST kedepan.

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

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

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

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

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%.

PENGARUH JENIS BAHAN PEREKAT DAN METODE PENGERINGAN TERHADAP KUALITAS BRIKET LIMBAH BAGLOG JAMUR TIRAM PUTIH (Pleurotus ostreatus) Siti Mushlihah; Sulfahri; Renia Setyo Utami; Eko Sunarto; I.D.A.A. Warmadewanthi
JURNAL PENELITIAN BIOLOGI BERKALA PENELITIAN HAYATI Vol 17 No 1 (2011): December 2011
Publisher : The East Java Biological Society

White mushroom is one of popular food commodity in East Java. Every year total production of white mushroom is more than 4800 ton. The cultivation of this mushroom needed the medium known as "baglog". Every 3 month the medium should be changed. The huge amount of solid waste will be produced around 40 tons/month and must be managed by farmer. Based on the composition of waste contains 80% of sawdust and 10% of rice brain. This composition known has a high concentration of carbon and potential as a material to produce of energy. This research investigated the effectiveness of "baglog" from medium of white mushroom cultivation as a briquette for energy alternative. Different variables used in this experiment are drying process and material that used as an adhesive for making of the briquette. The quality of the briquette such as energy value, compressive strength of briquette, moisture, fixed carbon and emission of briquette, was analyzed, based on Indonesia Standard. Result of the experiment showed that energy value of the briquette is 3400 cal/gram with drying process using oven. The compressive strength result showed that the adhesive using starch glue is very effective. This briquette is environmentally friendly

Co-Authors Abd. Rasyid Syamsuri Abdul Kahar Adi Soeprijanto Adi, Trijoko Wahyu Arino Anzip Arna Puji Rakhmawati Atthaya Namira Yulianto, Khenza Aulia Rodlia Fitriana Bieby Voijant Tangahu Eko Sunarto Joni Hermana Junia Istingadah 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 Siti Mushlihah Sulfahri Sulfahri Talent Nia Pramestyawati Widya Prihesti Iswarani Yustika Aristya Widyasari

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