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Wiharyanto Oktiawan
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Environmental Science

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STUDI KEMAMPUAN VERTICAL SUBSURFACE FLOW CONSTRUCTED WETLANDS DALAM MENYISIHKAN COD, NITRIT, DAN NITRAT PADA AIR LINDI (STUDI KASUS: TPA NGRONGGO, SALATIGA) Ismaryanto Gunawan; Wiharyanto Oktiawan; Mochtar Hadiwidodo
Jurnal Teknik Lingkungan Vol 2, No 2 (2013): Jurnal Teknik Lingkungan
Publisher : Departemen Teknik Lingkungan Fakultas Teknik Universitas Diponegoro

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ABSTRACTLeachate is one of resulting negative impact from landfilling in Indonesia. In common  leachate   containing an organic and inorganic matter with high concentration. Therefore, treatment of the leachate is essential  before  it  could  be  discharged  directly  into  the receiving water bodies. One of technology to treat landfill leachate which is by use of biological treatment. But this processing apparently is still result organic and inorganic content one high enough. Therefore, necessary continuing processing alternative which is by use of system Constructed Wetlands.  This research intent to know decrease of concentration COD, nitrit and nitrate, and removal efficiency on system Vertical Subsurface Flow Constructed Wetlands  by use of plant Scirpus grossus.  Besides that, the impact of variation amount plants and residence time would  be analized. The laboratory research was conducted with use 4 reactors. Reactor A with 4 plants, reactor B with 6 plants, reactor C with 8 plants, and rector C without plant. Four of the reactors operated at a flow rate of 10,5 ml / minutes for residence time 3 days, 5,3 ml / minutes for residence time 6 days, and 3,5 ml / minutes for residence time 9 days. System Vertical Subsurface Flow Constructed Wetlands  by use of plant Scirpus grossus  (lingi) can removal concentration of COD, nitrit, and nitrate. The highest removal efficiency for COD, nitrit and nitrat were 63,4%, 57,6%, and 59,0% respectively. All of them was reached by reactor C with residence time 9 days. Besides that, decrease concentrations COD, nitrit and nitrate on system Vertical Subsurface Flow Constructed Wetlands  regarded by amount plants and residence time.
DETAIL ENGINEERING DESAIN (DED) SISTEM PENYALURAN AIR LIMBAH DAN INSTALASI PENGOLAHAN AIR LIMBAH KAWASAN INDUSTRI BSB CITY, MIJEN KOTA SEMARANG Fazalaili Rahmawati A; Wiharyanto Oktiawan; Winardi Dwi Nugraha
Jurnal Teknik Lingkungan Vol 2, No 2 (2013): Jurnal Teknik Lingkungan
Publisher : Departemen Teknik Lingkungan Fakultas Teknik Universitas Diponegoro

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ABSTRACT BSB  City Industrial Estate is an industrial area which activities and centrally located in the district Mijen Semarang city, industrial area contains manufacturing and warehousing industries. this area will be constructed wastewater distribution system planning and Wastewater Treatment Plants. Widely held at the industrial park with an area of ± 110 ha area for existing or for future development. The distance between one industry to another with regular road network large enough to transport passing, the contours of which are in the industrial area has a contour in the form of hills and down into the river, this allows gravity flow drainage system. Distribution system which was selected to be applied in the industrial BSB City is a conventional system, since BSB City industrial area has a large area of land with a greater load distribution, so that the required pipe diameter is relatively large with no dependence on the availability of clean water. In addressing pollution would happen then to system off site, which means that the distribution of industrial waste water through a closed pipeline (sewerage system). Furthermore, for industrial wastewater treatment plant used wells equipped with pumps collector, barscreen, equalization basin, primary clarifier, activated sludge basin, and sludge drying bed. It hopefully will be able to overcome the environmental problems in the industrial area BSB City, Mijen Semarang City. In addition, off-site system and its wastewater treatment plant is expected to create the industry's healthy and environmentally friendly
STUDI IDENTIFIKASI PENGELOLAAN AIR LIMBAH DOMESTIK KECAMATAN SEMARANG TENGAH, SEMARANG TIMUR, GAYAMSARI, DAN GENUK KOTA SEMARANG Nureka Yuliani; Wiharyanto Oktiawan; Mochtar Hadiwidodo
Jurnal Teknik Lingkungan Vol 2, No 2 (2013): Jurnal Teknik Lingkungan
Publisher : Departemen Teknik Lingkungan Fakultas Teknik Universitas Diponegoro

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ABSTRACTNowadays the society of Middle Semarang, East Semarang, Gayamsari, and Genuk subdistrict are using on site system with water closet for sanitation infrastructure and throw away the grey water to drainage. Domestic waste water management isn’t in line with growth population and city function development, and as the concequence is environment quality degradation. This research is for knowing domestic waste water management condition from four subdistricts with investigate five aspects (organization, operational, funding, legal, and society participation). The result of operational aspect analysis is off site system for Middle Semarang, East Semarang, Gayamsari, and partly of Genuk. Whereas on site system with septic tank can be applied at Trimulyo, Terboyo Wetan, and Terboyo Kulon (Genuk subdistrict). Funding aspect alternative is  partly of APBD and partly of society toll and organize local independent group which controlling finance management. The result of organization aspect analysis alternative is a organization concept from city level till RW. Based on SWOT analysis for legal and society participation is produce an legal concept, increase socialiszation to society and involve private participation.
MASTERPLAN SISTEM PENGELOLAAN AIR LIMBAH INDUSTRI DI KAWASAN INDUSTRI BSB CITY, MIJEN-SEMARANG Ruli Triyani; Wiharyanto Oktiawan; Winardi Dwi Nugraha
Jurnal Teknik Lingkungan Vol 2, No 2 (2013): Jurnal Teknik Lingkungan
Publisher : Departemen Teknik Lingkungan Fakultas Teknik Universitas Diponegoro

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AbstractIndustrial Park BSB City, Mijen-Semarang has concept as green technology industrial park. There’s 11 industry producting wastewater in existing area at this time. The industrial wastewater flow to drainage without any treatment which make odours at industrial park area. PT Karyadeka Alam Lestari as developer industrial would be like to build wastewater treatment plant which treat all wastewater industries therefore it needs Masterplan Management System Wastewater Industry At Industrial Park BSB City, Mijen-Semarang. This masterplan designing based on industrial park masterplan finished 2025.
STUDI IDENTIFIKASI PENGELOLAAN AIR LIMBAH DOMESTIK di KECAMATAN MIJEN, GUNUNGPATI, GAJAHMUNGKUR dan SEMARANG SELATAN KOTA SEMARANG Alfiza Fahmi; Wiharyanto Oktiawan; Mochtar Hadiwidodo
Jurnal Teknik Lingkungan Vol 2, No 2 (2013): Jurnal Teknik Lingkungan
Publisher : Departemen Teknik Lingkungan Fakultas Teknik Universitas Diponegoro

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Abstract

Sanitation refers to the hygienic and proper management, collection, disposal or reuse of human excreta (feces and urine) and community liquid wastes to safeguard the health of individuals and communities. Sanitation have three primary objectives:Improving health conditions, promoting dignity of living or enhanced quality of life,  and protecting the environment. The combined positive effects of these conditions lead to wider economic benefit. One of sanitation component is domestic wastewater which is in fact haven’t use the proper management . Proper management can be decided by assessing current situation (sourced by primary and secondary data), gap analysis based on three aspects which is institutional aspects, technical aspects, financing aspects, legal aspects and community participation. This study identification focused on determining domestic wastewater processing system based on population density, the area physical condition, the source of water used, and the ability to finance. Whereas scope area of this identification study is Mijen, Gunungpati, Gajahmungkur and South Semarang at Semarang city. Mijen and Gunungpati has similarity at population density which is less than 150 people per ha and the area physical condition such as high permeability, ground water depth >50 meters, dominated by 2-15% slope, and also from the financial side that  range income level 1,5-3 million rupiah is still suitable for septic tank as it’s technology an on site system as its alternative system. In the other side, Gajahmungkur and South Semarang also has similarity at water used sourced which is 72% and 75%  respondent use PDAM as primary source and generally has middle class of  permeability. Both of this sub district also has population density more than 150 people per ha and the area dominated by 2-15% slope range which is all of those factor suitable for sewerage conventional as its technology.This study help the reader to make informed about the proper prossesing system of each study area and furthermore to achieve sanitation primary objectives.
Co-Authors Alfiza Fahmi Fazalaili Rahmawati A Ismaryanto Gunawan Mochtar Hadiwidodo Nureka Yuliani Ruli Triyani Winardi Dwi Nugraha