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wahyu widayat
Economic Development, Gadjah Mada University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Economics, Econometrics & Finance Education Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Transportation

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The effect of permanent shade tree at mature tea area on microclimate, the population of pest insects and natural enemies, and tea shoot production Widayat, Wahyu; Rayati, Dini Jamia
Jurnal Penelitian Teh dan Kina Vol 14, No 1 (2011)
Publisher : Research Institute for Tea and Cinchona

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (280.395 KB) | DOI: 10.22302/pptk.jur.jptk.v14i1.4

Abstract

A study to know the effect of permanent shade trees at mature tea area on microclimate, the population of pest insects and natural enemies, as well as tea shoot production was carried out at Blok B-4 Afdeling Gambung Selatan (1.300 m asl) of Research Insitute for Tea and Cinchona, Bandung, West Java, from January up to December 2009. The study carried out using experimental observation method with two treatments, viz. mature tea area with and without permanent shade tree, silver oak (Grevillea robusta). The parameters of microclimate: temperature, relative humidity, and sunshine intensity, the population of various pest insects and natural enemies, as well as tea shoot production were observed regularly during dry and rainy seasons at the two experimental plots. The results showed that the existence of permanent shade trees Grevillea robusta at mature tea area could maintain the temperature, relative humidity (RH), and sunshine intensity suitable for tea growth at dry season, suppress the population of pest insects, and on the contrary increase the population of natural enemies, as well as increase  the tea shoot production, up to 21% at rainy season, and up to 55% at dry season.
PROBLEM IDENTIFICATION OF DOMESTIC WWTP OFFICE BUILDING AND ALTERNATIVE TO OVERCOME THEM (CASE STUDY : PT. USAHA GEDUNG BDN, JAKARTA) Rahardjo, Petrus Nugro; Widayat, Wahyu
Jurnal Rekayasa Lingkungan Vol 9, No 2: Jurnal Rekayasa Lingkungan
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (249.808 KB)

Abstract

In general, the main problem of domestic wastewater treatment plant (WWTP) for office buildings in Jakarta is the incompatibility between the surface load of wastewater and the capacity of WWTP. At the beginning a capacity of WWTP is already predetermined and corresponding to the rate of wastewater generated. But because of the demands of the means for the benefit of various business, so that the capacities of the office building should be developed. This case occurred on PT. Usaha Gedung BDN. Four environmental parameters, namely TSS, Ammonia, Grease & Oil and COD, produced from the WWTP still exceeded the allowable quality standards. Therefore PT. Usaha Gedung BDN immediately needs WWTP capacity development plan which is adequate. Various types of technology have been widely available and ready to be used to overcome the problems of the WWTP. But on this occasion it is advisable to develop the existing WWTP facilities by adding a new WWTP unit. The first WWTP is functioned as the preliminary processing unit and the new WWTP will become an advanced processing unit. The use of a combination of anaerobic-aerobic biofilter will be relied upon to reduce pollutants that can qualify water quality standards in accordance with applicable regulations.keywords : problem identification, domestic wwtp, advanced processing
UJI KINERJA PENGOLAHAN AIR LIMBAH INDUSTRI NATA DE COCO DENGAN PROSES LUMPUR AKTIF Said, Nusa Idaman; Widayat, Wahyu
Jurnal Air Indonesia Vol. 11 No. 2 (2019): Jurnal Air Indonesia
Publisher : Center for Environmental Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1331.119 KB) | DOI: 10.29122/jai.v11i2.3938

Abstract

Industri Nata de Coco merupakan merupakan salah satu agroindustri yang dalam proses produksinya menghasilkan air limbah yang bersifat asam dan mengandung konsentrasi polutan organik yang tinggi, terutama air limbah yang berasal dari sisa fermentasi nata. Oleh karena itu, air limbah tersebut harus diolah dengan baik agar tidak mencemari lingkungan. Berdasarkan Peraturan Menteri Lingkungan Hidup Republik Indonesia Nomor 5 Tahun 2014 Tentang Baku Mutu Air Limbah, baku mutu air limbah industri Nata de Coco yang boleh dibuang ke badan air atau saluran umum yakni dengan konsentrasi maksimum COD 150 mg/l, BOD 75 mg/l, TSS 100 mg/l dan pH 6-9. Tujuan penelitian ini adalah melakukan uji kinerja pengolahan air limbah industri Nata de Coco yang berlokasi di Gunung Putri, Kabupaten Bogor, menggunakan proses lumpur aktif. Penelitian dilakukan mulai bulan Februari sampai dengan bulan April 2019. Dari hasil penelitian dapat diketahui bahwa air limbah industri Nata de Coco mempunyai pH yang rendah dengan konsentrasi zat organik (COD) yang tinggi, dapat mencapai lebih dari 5000 mg/l. Perbandingan BOD/COD air limbah berkisar 0,34 sehingga relatif sulit untuk terurai secara biologis. Untuk mengolahan air limbah industri Nata de Coco dengan menggunakan proses lumpur aktif, pH air perlu dinaikan menjadi sekitar 8 agar proses lumpur aktif berjalan optimal. Hasil penelitian menunjukkan bahwa dengan beban COD rata-rata 0,56 kg COD/m3.hari didapatkan efisiensi rata-rata penghilangan COD sebesar 95,7 %. Kata Kunci: Air Limbah, Nata de Coco, Lumpur Aktif
Peningkatan Kualitas Air Baku dari Sungai Surabaya dengan Proses Biofiltrasi Said, Nusa Idaman; Widayat, Wahyu; Nugroho, Rudi
Jurnal Teknologi Lingkungan Vol. 21 No. 1 (2020)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (633.337 KB) | DOI: 10.29122/jtl.v21i1.3284

Abstract

ABSTRACTSurabaya River is a source of raw water for the needs of the community in Surabaya and its surrounding areas, including for industrial and the Surabaya water supply company. Along with the rapid growth of settlements and the development of the industrial sector, the Surabaya River pollution level has increased so that the quality of the water does not meet the quality standards required as raw water for drinking water. The most potential parameter that causes the level of pollution is organic pollutants. The concentration of some water quality parameters including organic pollutants in the Surabaya River has exceeded class I water quality standards based on Government Regulation (PP) No. 82 of 2001, namely for allotment of raw water for drinking water. The purpose of this study was to improve the raw water quality such as parameters of suspended solids (TSS), organic substances, detergents and manganese (Mn) through the application of biofilter technology. The study was conducted by operating a biofilter pilot plant consisting of a lamella-type settling tank and a biofilter reactor filled with wasp-type nesting media. The results showed that the biofilter process used can reduce the concentration of TSS, organic matter, detergents and Mn in raw water. In general, the longer the hydraulic residence time (HRT) in the biofilter pilot plant, the greater the efficiency of removing TSS, organic matter, and detergent in raw water. The experiments results at the conditions of the shortest total HRT of 81 minutes, including HRT of 36 minutes in the settling tank and HRT of 45 minutes in the biofilter reactor, could obtain TSS removal efficiency of 46.92%, 15.97% for organic matter, and 55% for detergent, where the concentration of these parameters meets the quality standards for drinking water.Keywords: biofiltration, HRT, drinking water, water qualityABSTRAKSungai Surabaya merupakan sumber air baku untuk kebutuhan masyarakat di wilayah Surabaya dan sekitarnya, termasuk untuk kebutuhan industri dan air baku PDAM kota Surabaya. Seiring pesatnya pertumbuhan pemukiman dan perkembangan sektor industri, mengakibatkan tingkat pencemaran Sungai Surabaya semakin tinggi sehingga kualitas airnya tidak memenuhi ketentuan baku mutu yang dipersyaratkan sebagai air baku air minum. Parameter yang paling potensial menyebabkan tingkat pencemaran tersebut adalah polutan organik. Konsentrasi beberapa parameter kualitas air termasuk polutan organik di sungai Surabaya telah melebihi baku mutu air kelas I berdasarkan Peraturan Pemerintah (PP) No 82 tahun 2001, yakni untuk peruntukan air baku air minum. Tujuan dari penelitian ini adalah untuk melakukan peningkatan kualitas air baku seperti parameter padatan tersuspensi (TSS), zat organik, deterjen dan mangan (Mn) melalui penerapan teknologi biofilter. Penelitian dilakukan dengan mengoperasikan pilot plant biofilter yang terdiri dari bak pengendap tipe lamella dan reaktor biofilter yang diisi dengan media plastik tipe sarang tawon. Hasil penelitian menujukkan bahwa proses biofilter yang digunakan dapat menurunkan konsentrasi TSS, zat organik, deterjen dan Mn di dalam air baku. Secara umum semakin lama waktu tinggal di dalam pilot plant biofilter, efisiensi penghilangan TSS, zat organik, dan deterjen di dalam air baku semakin besar. Hasil percobaan pada kondisi total waktu tinggal terpendek (total HRT) 81 menit, meliputi HRT di bak pengendap 36 menit dan HRT di reaktor biofilter 45 menit, didapatkan efisensi penghilangan TSS 46,92 %, zat organik 15,97 %, dan deterjen 55 %, dimana konsentrasi parameter-parameter tersebut memenuhi baku mutu untuk air minum.Kata kunci: biofiltrasi, HRT, air minum, kualitas air
INOVASI TEKNOLOGI AIR MINUM BERBASIS MASYARAKAT Widayat, Wahyu
Jurnal Air Indonesia Vol. 10 No. 2 (2018): Jurnal Air Indonesia
Publisher : Center for Environmental Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1305.013 KB) | DOI: 10.29122/jai.v10i2.3762

Abstract

Sumber air minum daerah padat penduduk dan masyarakat pesisir dipenuhi dari air permukaan atau sumur dalam. Air permukaan dipengaruhi oleh pasang air air laut , sehingga hampir sepanjang  waktu dalam setahun kualitas airnya payau bahkan asin. Disamping konsentrasi garam yang tinggi, kualitas air sumur dalam juga buruk yaitu mengandung zat organik, besi dan mangan tinggi, hal ini disebabkan oleh struktur tanah dan sanitasi lingkungan yang buruk dari masyarakat nelayan. Penggunaan air hujan sebagai sumber air alternatif dalam pemecahan masalah tersebut, terbatas untuk memenuhi kebutuhan air minum di musim penghujan. Alternatif lain, masyarakat harus mencari dari daerah lain yang jauh dari rumah mereka atau membeli air dengan harga mahal. Untuk memecahkan masalah kritis ini diperlukan penerapan teknologi pengolahan air yang sesuai. Teknologi pengolahan air ini harus menghasilkan air minum yang memenuhi standar teknis dan teknologi yang aplikatif, mudah dan murah dalam operasi dan pemeliharaan karena diharapkan masyarakat di daerah itu dapat mengelola, mengoperasikan dan maintenace. Teknologi osmosa balik untuk mengolah air asin menjadi air minum merupakan salah satu alternatif untuk memenuhi kebutuhan air minum yang memenuhi syarat teknis kesehatan dan hasil pengelolaannya dapat meningkatkan derajad sosial maupun ekonomi masyarakat nelayan.Kata kunci : air minum, air asin, masyarakat pesisir, osmosa balik, padat penduduk
PILOT PLANT PENGOLAHAN AIR MINUM DENGAN PROSES BIOFILTRASI DAN ULTRAFILTRASI Said, Nusa Idaman; Widayat, Wahyu
Jurnal Air Indonesia Vol. 4 No. 1 (2008): Jurnal Air Indonesia
Publisher : Center for Environmental Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (561.162 KB) | DOI: 10.29122/jai.v4i1.2363

Abstract

Until now, the drinking water companies in Indonesia still use chlorine for disinfection processes. In addition, the chlorine also uses for removal Fe, Mn and ammonia. If the raw water contains high concentration of ammonia, chlorine will react with ammonia form chloramines which have lower strength of disinfection power. The higher concentration of ammonia in raw water caused the higher consumption of chlorine. The reaction of chlorine with certain organic compounds as humic substances will to produce chloro-organo compounds like chlorophenols which become serious problems to day because trihalomethane and also chlorophenols compounds are carcinogenic substances.To overcome the problems one of alternative is using the combination of biofiltration and ultrafiltration to process the drinking water. Biofltrations process is treatment of raw water biologically using fixed bed biofilter reactor witch filled with honeycomb plastic supporting media for removal Fe, Mn, ammonia detergent, and also organic substances. Ultrafiltration (UF) is filtration process using hollow fiber membranes that have effective pore sizes of 0.1 – 0.01 µm. The ultrafiltration units are capable of separating some large molecular weight dissolved organics, colloids, macromolecules and suspended solids from raw water. The ultrafiltration process is designed to remove colloidalized particles in the range from 0.1-0.01µm.By combining the biofiltration and ultrafiltration processes, hence will be got technological alternative of drinking water process which capable to degrade an organic matter, ammonia, detergent and can remove the colloidal or suspended matter effectively without chemicals instead of conventional process. Kata Kunci : Pengolahan Air Minum, Biofiltrasi, Membran, Ultrafiltrasi, Pilot Plant
PENYEDIAAN AIR SIAP MINUM PADA SITUASI TANGGAP DARURAT BENCANA ALAM (Belajar Dari Kasus Gempa Bumi Yogyakarta Dan Jawa Tengah) Indriatmoko, Robertus Haryoto; Widayat, Wahyu
Jurnal Air Indonesia Vol. 3 No. 1 (2007): Jurnal Air Indonesia
Publisher : Center for Environmental Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (492.321 KB) | DOI: 10.29122/jai.v3i1.2315

Abstract

A response in an emergency condition  is the most critical thing in natural disaster. In this situation, every thing is in a panic. Any decision must be taken  tactically, quickly and property to minimize the number victims and severity as the impact of disaster. One of the response in an emergency is to provide facility of drinking water treatment unit which has to be located at the respective disaster area. This unit is designed compacly with high mobility, flexible and easily operated to fullfil the potable water need for the victims. The treatment processes use are filtration, adsorbtion and sterilization. The capacity is 1 M3/hour.      Katakunci : Tanggap darurat, air minum, ultra filtrasi,  bencana alam, mobilitas tinggi, tepat sasaran, emergency use, potable water treatment.
PENGOLAHAN AIR PAYAU MENGGUNAKAN TEKNOLOGI MEMBRAN SISTEM OSMOSA BALIK SEBAGAI ALTERNATIF PEMENUHAN KEBUTUHAN AIR MINUM MASYARAKAT KEPULAUAN SERIBU Widayat, Wahyu
Jurnal Air Indonesia Vol. 1 No. 3 (2005): Jurnal Air Indonesia
Publisher : Center for Environmental Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (199.764 KB) | DOI: 10.29122/jai.v1i3.2354

Abstract

Kepulauan seribu (Seribu Archipelago) is one of region of north jakarta, the province of DKI Jakarta Raya which is populated by around 18.000 inhabitants. It consists of 111 small islands. Among them, there are about 11 (eleven) islands are stated as the residential:   P. Untung Jawa, P. Tidung Besar, P. Lancang Besar, P. Panggang, P. Pramuka, P. Kelapa I, P. Kelapa II, P. Harapan, P. Sebira. P. Payung dan P. Pari. P. Panggang and P. Kelapa I are the most populated.In relation to the clean water supply, specifically for drinking water/freshwater, mostly is got from the narrow well, rainfall and some water treatment installations that heve been owned by some islands. However, problem arises when the prolong dry season comes as the quality of water in the narrow well decreases significantly, the well water became brackish. In order to cope this problem, the avaibility of sufficient water treatment installations to process brackish water into freshwater is very important. The water treatment installation with reverse osmosis system is one of the most effective alternative in order to provide the freshwater for the people in the islands. The system has also been aplied sufficiently in several islands, such as P. Kelapa I, P. Tidung, P. Pramuka, P. Untung Jawa, P. Panggang dan P. Harapan Kata Kunci : Pengolahan Air payau, Osmosa balik, Air minum.
RANCANG BANGUN PAKET IPAL RUMAH SAKIT DENGAN PROSES BIOFILTER ANAEROB-AEROB, KAPASITAS 20-30 M3 PER HARI Widayat, Wahyu; Said, Nusa Idaman
Jurnal Air Indonesia Vol. 1 No. 1 (2005): Jurnal Air Indonesia
Publisher : Center for Environmental Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (637.835 KB) | DOI: 10.29122/jai.v1i1.2283

Abstract

It is obvious that hospital waste water is one of the most potential pollutant to the evironment. Thus the waste must be treated properly before it is disposed of to the public sewage facilities. However, limited fund usually become an obstacle when hospitals will construct waste treatment facilities, especially for midle and small typed hospitals.Considering the problem, development of proper waste treatment facilities which is cheap in terms of technology and price and easy operated is very important.This paper describes scheme of biological waste water treatment unit for hospitals which is suitable for Anaerob-aerob Biofilter waste water treatment process. By applying this system Anaerob-aerob Biofilter, concentration of COD, BOD and suspended solid material can be reduced significantly as well as detergen and ammonia. Keywords : rancang bangun, waste water, biofilter, Anaerob-aerob
TEKNOLOGI PENGOLAHAN AIR SIAP MINUM UNTUK DAERAH PADAT PENDUDUK Widayat, Wahyu
Jurnal Air Indonesia Vol. 1 No. 2 (2005): Jurnal Air Indonesia
Publisher : Center for Environmental Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (422.756 KB) | DOI: 10.29122/jai.v1i2.2341

Abstract

One of common problem on dense settlement area in Indonesia is the need for clean water and especially at rural and isolated areas this problem have not been properly solved yet. The ground and river water which consume by the community do not meet the requirement for drinking water, even at several places the water is not suitable to drink. The standard requirement for drinking water have to comply with the physical, chemical and biological requirements and if one parameter do not comply with the requirement then the water is not proper to drink.Most of residential area in Indonesia have poor water quality and have not got clean water services from local PAM, therefore in order to fulfill the need for drinking water, the community buy bottled drinking water which is very expensive.To overcome the above problem, a pilot  unit package of technology have been developed, to treat well water or clean water from PAM to be direct to drink water ( no need to boiled it ). The unit consists of water pump, sand filter, mangan zeolit filter, activated carbon filter, cartridge filter, ultra violet sterilisator and ozon generator Kata Kunci : Air tanah, air PAM, pengolahan air,  air siap minum
Co-Authors Arie Herlambang Bagaskoro Dini Jamia Rayati, Dini Jamia Fausil Indriyanti, Niken Mony, Siti Rasnawati Muhammad Yusuf Nusa Idaman Said Petrus Nugro Rahardjo Robertus Haryoto Indriatmoko Rudi Nugroho satmoko yudho Satmoko Yudo Sitorus, Jonggung Suprihatin Suprihatin Syani, Mamay Talita Shofa Adestia Toto Subroto Wibowo, Ekasari Kartika Putri