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Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan
Published by Universitas Diponegoro
ISSN : 1907817X     EISSN : 25500023     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences
Arjuna Subject : -
Articles 587 Documents
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Bioconversion of Black Soldier Fly (BSF) from Organic Waste Composting into Biodiesel Assisted by Whole Cell Microbial Lipase Biocatalyst through Direct Transesterification Process Sari Sekar Ningrum; Aidha Zulaika; Briantama Hanif S; Dewa Ayu Dinda
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 20, No 2 (2023): July 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v20i2.439-451

Abstract

Black Soldier Fly or Hermetia Illucens (BSF) is known for its potential as a biological agent that helps in the process of natural conversion of organic waste. Resulting compost and a large number of BSF colonies, potentially to be use as a non-food raw material in bioenergy production. The Method is BSF conversion experiment by direct transesterification reaction using Lab-scale bioreactor in 100ml three bottle neck flasks, the solution mixture consists of BSF powder, immobilized whole cell biocatalyst, and solvent. The Result is although in appearance the structure of the test mixture solution did not show an oily character, but based on the viscosity and density test, the test solution had density value 0.81 g/cm3 and viscosity value 1,024 mm2 /s which are above the value of the viscosity and density of methanol but still below the value of the viscosity and density of both SNI and EN14214 biodiesel standard, this could be due to insufficient separation or reaction, imperfect condition, and impurities that are still present in biodiesel products. It can be concluded that a transesterification reaction has occurred in this trial, however further analysis and more experiments are required to definitely conclude the changes in biodiesel production.
Various Community Motivations for the Success of Ecosystem Restoration in Mount Baung Nature Park, Pasuruan Regency Asep Hawim Sudrajat; Surjono Surjono; Jati Batoro
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 20, No 2 (2023): July 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v20i2.390-401

Abstract

Mount Baung is a conservation forest area located in Pasuruan Regency. In this area, there is an area of 27 ha that has been damaged. Research on the motivation of local communities in supporting the success of ecosystem recovery is very important to obtain an overview of the situation of high exclusion costs in the use of forest resources in Mount Baung Nature Park. Research methods are quantitatively presented in statistical data through the analysis of validity, ratability, multiple linear regression and determination. The regression test analysis value was Sig 0.559. It can be concluded if the regression value is significant. Then it was found that there were 11 variables that were very influential. The high determining factors to be able to increase community motivation in the management of Mount Baung are monitoring and assessing the results of ecosystem management, utilizing the results of Mount Baung Nature Park management of Mount Baung, the role of program managers (BKSDA), the desire to increase income. Support community/government leaders and community initiatives. As an effort to manage the sustainable Mount Baung Nature Park of Mount Baung, the determining factors to increase community motivation need to be an important consideration in community assistance.
Vegetation Density Analysis in Padalarang Bandung Regency Using NDVI Method on Landsat 8 Satellite Ratna Widyaningtyas; Mini Ambarwati Kusuma Dewi; Maulyda Shofa Azizia; Hashfi Hawali Abdul Matin
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 20, No 2 (2023): July 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v20i2.326-333

Abstract

Vegetation is an important component in an ecosystem. Padalarang Sub-District is a sub-district in West Bandung Regency with the smallest area but the most densely populated among other sub-districts in West Bandung, with a density of 3,478 people km2. The purpose of this research is to analyze the level of vegetation density using the Normalized Difference Vegetation Index (NDVI) technique as a consideration, especially for the government regarding development program arrangements. The method used was Landsat 8 image interpretation with NDVI, and the results will be classified according to the classification of vegetation density used. As a result, the density of vegetation has decreased from 2013 to 2021, area of non-vegetation and sparse vegetation land indicates, increasing by 5.3% and 4.51%, respectively. In the classification of fairly dense, dense, and very dense vegetation, density decreased by 4.39%, 4.86%, and 0.55%, respectively, which has resulted in reduced green areas becoming built-up areas along with the development of the number and mobility of the population. It is necessary to increase the amount of vegetation and stipulate development regulations that take into account the existence of vegetation as a support for ecological functions.
Determination of Optimum Conditions for Synthesis of Methyl Ester from Bleached Crude Palm Oil Using Sn-Zeolite and Red Mud Catalysts Esi Amelyanti; Thamrin Usman; Winda Rahmalia
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 20, No 2 (2023): July 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v20i2.267-279

Abstract

Methyl esters synthesis from bleached crude palm oil (BCPO) containing 0.36 and 20.86% of free fatty acids using Sn-zeolite and red mud has been done. This study aims to determine the esterification, transesterification, and transesterification-esterification simultaneous reactions optimum conditions when using Sn-zeolite, red mud, and Sn-zeolite-red mud mixture catalysts. The X-ray diffraction and Fourier transform infrared analysis results show that Sn has been impregnated on zeolite, indicated by cassiterite and Sn-O-Sn vibrational peaks in Sn-zeolite. The main component of red mud is NaCO3, indicated by analcite and carbonate peaks. Thin-layer chromatography results in the transesterification showed that red mud catalyst could totally convert triglycerides from BCPO to methyl ester when 5% catalyst, 3 hours, and CPO:methanol mole ratio 1:20 were used. In esterification, Sn-zeolite can synthesize methyl ester from low-quality CPO when using CPO:methanol mole ratio 1:20 for 3 hours, however, the conversion was not total. In the transesterification-esterification simultaneous, the conversion was also not total which the best reaction conditions at mixing Sn-zeolite:red mud 1.5:1 (w/w), 7% catalyst, and CPO:methanol mole ratio 1:20 for 3 hours. This study shows that esterification and transesterification processes can be carried out simultaneously at a particular mass ratio of Sn-zeolite and red mud.
Identification of the Influence of Socio, Demographic, and Economic Factors on Domestic Water Consumption Patterns (A Case Study: Bandar Lampung City, Indonesia) Dion Awfa; Ainan Azka; Yulisa Putri; Nasrul Putra; Ahmad Daudsyah Imami; Rifka Noor Azizah; Wisnu Prayogo
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 20, No 2 (2023): July 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v20i2.365-377

Abstract

Urban water management efforts are essential in encouraging the fulfillment of the SDGs targets. One action that can be done is to approach the calculation of the actual water consumption value. This research conducted a survey of domestic water consumption in Bandar Lampung City to obtain comprehensive information. Bandar Lampung City was chosen because it is one of the cities on the island of Sumatra with a high economic growth rate. Lampung Province is the top 3 province in Sumatera Island with the higher Gross Domestic Product Growth on 2022, with Bandar Lampung as its capital city. Furthermore, water consumption patterns were analyzed for various activities, socio demographic conditions, and the community's economy. The results showed that of the 404 samples, the average water usage was 195.08 liters/person/day, with the dominant activities in use including bathing (66.84 liters/person/day), flushing the toilet (35.71 liters/person) / day), and ablution (29.74 liters/person/day). Furthermore, the variable number of family members in one house and income level have significant different on total domestic water consumption. The results obtained in this study are expected to assist in making decisions regarding urban water management plans.
Environmental Impact Assessment of Co-firing Implementation at X Steam Power Plant, West Java Dessy Tri Nugraheni; Rachmadhi Purwana; Udi Syahnoedi Hamzah
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 20, No 2 (2023): July 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v20i2.334-344

Abstract

Co-firing is the activity of adding biomass to the combustion process as a mixed fuel for coal in power plants. In 2021 co-firing has been carried out at 17 PLTUs in Indonesia. The co-firing program at a steam power plant is a form of reducing coal consumption which can reduce carbon emissions while increasing the use of renewable energy without increasing investment in new power plants. PLTU X in West Java, Indonesia has implemented co-firing using sawdust biomass using the direct method without adding or modifying equipment. The use of biomass is obtained from wood-cutting waste, with a ratio of sawdust biomass usage <5%. Assessment of potential environmental impacts is carried out using the Life Cycle Assessment (LCA) method with cradle-to-gate coverage through two scenarios, namely full coal burning, and co-firing. The functional unit uses 1 kWh and the potential impact assessment method used IPCC2021 GWP100 and the CML-IA baseline. The results of the study obtained an assessment of the potential for environmental impact that could reduce the Global Warming Potential (GWP) by 0.13%, acidification by 0.40%, and eutrophication by 0.14%, but there was an increase in ozone layer depletion by 0.72%.
Determination of Strategy Planning of Domestic Wastewater Management System in a Commercial Area of Tasikmalaya City Mila Dirgawati; Mohamad Rangga Sururi; Dhama Yudha Suhendar
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 20, No 2 (2023): July 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v20i2.280-294

Abstract

The domestic wastewater in Cihideung and Tawang Subdistricts as central business district (CBD) areas in Tasikmalaya City is only served by an on-site domestic wastewater management system or Sistem Pengelolaan Air Limbah Domestik Setempat (SPALD-S) which could deteriorate the environment. This study aims to determine the most appropriate type, strategy, and development direction of SPALD based on the existing local conditions for the next 20 years in CBD areas in big cities such as Tasikmalaya. The two methods were used: the multicriteria decision analysis method which refers to the Regulation of the Minister of PUPR Number 04 of 2017, and the Quantitative SWOT analysis method refers to the Guidelines for Preparing a Wastewater Management System Plan. The results of the analysis show that integrated SPALD (SPALD-T) must be implemented aggressively in the two sub-districts based on the key parameters of the existing SPALD conditions, potential for soil contamination, potential danger to air receiving bodies, socio-economic characteristics of the community, public health conditions, education level, financial capability, and the availability of regulations regarding SPALD. The SPALD-T development is suggested to be carried out in stages by determining priority zones for every five years of the planning period.
Promoting Geographical Indication of Banyuwangi Liberoid Coffee: A Community Capital Framework Danniary Ismail Faronny; Wenny Bekti Sunarharum; Luchman Hakim
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 20, No 2 (2023): July 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v20i2.402-416

Abstract

Promoting Geographical Indications (GI) for Liberica coffee in Banyuwangi is essential to enhance its recognition as a strategic economic commodity. This study aims to map communal assets using the Community Capital Framework (CCF) owned by coffee producers, supporting the development of GIs. Data was collected through on-site semi-structured questionnaires and interviews using a qualitative descriptive approach. The analysis, based on the CCF approach encompassing natural, cultural, human, social, political, financial, and built capital, allows for a comprehensive understanding of community resources. Integrating the CCF in promoting GI for Liberica coffee holds potential for sustainable development in Banyuwangi. Considering the seven key capitals (environmental, human, economic, infrastructure, social, cultural, and political) enables the formulation of a comprehensive strategy, ensuring product quality, market value, environmental sustainability, and the community's economic growth. By strengthening the Liberica coffee sector through the integration of CCF and GI promotion, the study facilitates heightened competitiveness, reputation, and market value, benefiting smallholder farmers and fostering overall economic growth. This approach aligns with the broader goals of sustainable development and contributes to the empowerment of the local coffee community in Banyuwangi.
The Distribution of Dengue Fever Case Based on Environmental Factors using Spatial Analysis Meirisa Ayu Hartini; Eram Tunggul Pawenang
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 20, No 2 (2023): July 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v20i2.345-355

Abstract

Dengue hemorrhagic fever (DHF) cases in the working area of Margorejo Health Center increased significantly from seven (2021) to 66 (September 2022). One of the efforts to anticipate the disease is acknowledging the distribution pattern of DHF using GIS. This study proposes to reveal the spatial pattern of case distribution, mapping of the vulnerable area, and overlay of LFP (larvae-free rate) related to DHF in the determined working area of Margorejo Health Center. This study was descriptive. The population was patients of DHF. The selected samples were 66. Data were analyzed utilizing univariate and spatial analyses, based on the Average Nearest Neighbor statistical analyses, p-value = 0.001, Z-score = -7.078, and NNI = 0.54<1. These results indicate a clustered spatial pattern, primarily in densely populated areas. The distribution is seen in the buffer area of 250 meters, 750 meters, and 800 meters. The dengue case intensity, population density, and buffer area determine vulnerable areas. Based on the elaborated maps, further, follow-ups related to countermeasures and prevention of DHF are expected to be carried out in the determined area.
Removal Efficiency of Total Chrome (Cr-T) from Textile Industry Wastewater PT. X with Sodium Bentonite Using the Adsorption Method Etih Hartati; Raisa Nur Azizah; Dyah Marganingrum
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 20, No 2 (2023): July 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v20i2.295-304

Abstract

As much as 10-50% of dye wastewater from the dyeing process is discharged directly into the environment. Chromium is the metal most often found in textile industry wastewater, one of which comes from dyes of the Congo Red type, so processing is required. One of the treatments to remove total chromium from textile industry wastewater is adsorption, with sodium bentonite as an adsorbent. This study aimed to determine the optimum efficiency and processing of total chromium using sodium bentonite as an adsorbent with a batch system and to determine the appropriate type of isotherm. The method used to test total chromium was the standard addition method which was then measured using an AAS (Atomic Absorption Spectrophotometry). The variables studied were the effect of wastewater pH, sodium bentonite and grain size of wastewater on the efficiency of total chromium removal. The types of isotherms tested are Langmuir and Freundlich isotherms. In removing total chromium with sodium bentonite, optimum conditions were obtained at pH 8 with a grain size of 80 mesh and a volume of 50% wastewater with a removal efficiency of 98.08%. The appropriate isotherm model for sodium bentonite is the Freundlich isotherm.

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