cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
konversi@ulm.ac.id
Editorial Address
-
Location
Kota banjarmasin,
Kalimantan selatan
INDONESIA
Konversi
Published by Universitas Lambung Mangkurat
ISSN : 23023686     EISSN : 25413481     DOI : -
Core Subject : Education,
Education
Arjuna Subject : -
Articles 263 Documents
 18   19   20   21   22 
IMPROVING BIO-OIL QUALITY VIA CO-PYROLYSIS EMPTY FRUIT BUNCHES AND POLYPROPILEN PLASTIC WASTE Sunarno Sunarno; Alfi Randi; Panca Setia Utama; Silvia Reni Yenti; Wisrayetti Wisrayetti; Doni Rahmat Wicakso
Konversi Vol 10, No 2 (2021): Oktober 2021
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v10i2.11384

Abstract

The current consumption of fuel oil, especially gasoline and diesel oil, is increasing. Along with the decline in production, national oil production activities encourage efforts to find alternative fuels as a substitute for oil-based energy supplies. Bio-oil is an environmentally friendly alternative fuel for diesel that can be used as fuel. In this study, the raw materials were palm oil empty bunches and polypropylene plastic waste. The purpose of this study was to determine the effect of the ratio of raw material for oil palm empty fruit bunches and polypropylene, the effect of co-pyrolysis temperature on the yield of bio-oil and determine the characteristics of the resulting bio-oil. This study used the variable ratio of oil palm empty fruit bunches and polypropylene (100:0, 80:20, 70:30 and 60:40) and co-pyrolysis temperature (400, 450, 500 and 550 °C). The results showed that the highest yield of bio-oil was obtained, namely 41.6% with a ratio of EFB: PP (80:20) at temperature of 450 °C. The characterization of the product obtained was density of 0.891 g/ml,  viscosity of 4.18 cSt,  pH of 3.38 and  calorific value of 43.2 MJ/kg.
THE SUSTAINABILITY ASSESSMENT OF COMMUNAL WASTE WATER TREATMENT PLANT (WWTP) IN INDONESIA: CASE STUDI COMMUNAL WWTP IN SLEMAN REGENCY, YOGYAKARTA, INDONESIA Dwi Saputri; Fajar Marendra; Agus Prasetya; Ahmad Tawfiequrrahman Yuliansyah
Konversi Vol 10, No 2 (2021): Oktober 2021
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v10i2.10806

Abstract

Wastewater contains pollutants that can disturb the balance of the ecosystem in the form of health problems, water quality degradation and others. According to Said, (2008) the problem experienced in almost all cities in Indonesia is wastewater pollution. The purpose of this study is to determine the distribution of conditions and performance values, factors that influence the conditions and performance of Communal WWTPs in Sleman Regency Yogyakarta. The method used in this study is an interview with the help of guidelines to respondents who have been determined. The location of the sample collection was determined by the stratified random sampling method based on the District and Village for the decision of data collection at 30 Communal WWTPs of Sleman Regency. The results of the interview are processed by the Likert scoring method and then drawn with the Radar Chart. The factors that influence the conditions and performance of Communal WWTPs are then obtained from the ranking of the criteria for the conditions and performance of Communal WWTPs that have been calculated. The results showed that overall Communal WWTPs in Sleman Regency had conditions and performance with a value of 2.98 which was included in the interval of value 3 with a fairly good category. This value consists of the value of the technical aspect of 3.52 with a very good category, the value of the environmental aspect of 2.94 with a fairly good category, and the value of the socio-economic aspect of 2.48 with a rather poor category. Factors that influence the condition and performance of Communal WWTPs in Sleman Regency whose value is still less than expected are the maintenance of facilities with a value of 2.27, the load of wastewater with a value of 2.43, the institutional value of 2.47, and the management performance monitoring program with a value of 2.50 which falls into the rather poor value category.
KINETIC STUDIES OF Cu ADSORPTION FROM SASIRANGAN LIQUID WASTE USING RICE HUSK ACTIVATED CARBON Isna Syauqiah; Desi Nurandini; Nopi Stiyati Prihatini; Jamiyaturrasidah Jamiyaturrasidah
Konversi Vol 10, No 2 (2021): Oktober 2021
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v10i2.11660

Abstract

The industry of sasirangan – traditional fabric of Banjar Tribe – has been one of prime commodities of South Kalimantan. The coloring process  in sasirangan production used a lot of chemical elements containing heavy metals  and its waste potentially pollute the environment. One of the heavy metal waste contained is copper (Cu) which is toxic to aquatic organisms and humans. The treatment for sasirangan liquid waste can be done by adsorption process using activated carbon as adsorbent. This study aims to determine the appropriate kinetic model for adsorption of Cu metal from sasirangan liquid waste using activated carbon adsorbent made from rice husks.The process was conducted by batch system with chemical and physical activation. Chemical activation was done by soaking the activated carbon of rice husk with HCl solution for 24 hours. While physical activation was carried out by burning in a furnace at 500̊C for 2 hours. The adsorption treatment was given on sasirangan waste samples with variations on contact time (30, 60 and 120 minutes). The results of kinetics study showed that the adsorption process of Cu from sasirangan liquid waste onto rice husk activated carbon adsorbent followed first-order reaction kinetics with a correlation coefficient value (R2) of 0.96 and adsorption rate constant (k1) of 0.0044 min-1.
UTILIZATION ACTIVATED CHARCOAL OF HYACINTH AS PEAT WATER BIOFILTER USING ZnCl2 ACTIVATOR Noor Khamidah; Hairu Suparto; Ita Oktavianingsih
Konversi Vol 10, No 2 (2021): Oktober 2021
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v10i2.10973

Abstract

Peat water is a type of water that does not meet the quality of clean water because it has a cloudy color, smells, tastes and low pH. One of the peat water repair technologies is to use activated charcoal to improve the quality of peat water. Water hyacinth has the potential to be used as activated charcoal because it has high levels of C-organic. Charcoal needs to be activated to open the pores, one of activator materials that can be used is ZnCl2. This study aims to determine the potential of water hyacinth activated charcoal to be used as a peat water biofilter, to determine the usefulness of ZnCl2 as a water hyacinth charcoal activator, and to determine the correct concentration of ZnCl­­2 activator for water hyacinth charcoal activation process. The research was conducted at the Production Laboratory of the Agroecotechnology Department, Animal Nutrition and Food Laboratory, Animal Husbandry Department, Agriculture Faculty, and Water Quality and Hydro-Bioecology Laboratory, Aquatic Resources Management Department, Fisheries and Marine Faculty, Lambung Mangkurat University, Banjarbaru, from December 2020-January 2021. This study used a completely randomly design (CRD) single factor that is difference in the concentration of ZnCl2 activator with 4 experimental units. Activated charcoal of water hyacinth can be used as a peat water biofilter as indicated by the parameters of turbidity, TDS, pH, temperature, taste and smells of water. ZnCl­2 can be used as an activator for charcoal of water hyacinth using the physic-chemical activation method. The correct concentration of activator is ZnCl2 30%.
EFFECT OF TEMPERATURE AND BLENDING RATIO TO PRODUCT DISTRIBUTION OF CO-PYROLYSIS LIGNITE AND PALM KERNEL SHELL Rinny Jelita; Jefriadi Jefriadi; Muhammad Jauhar Mahdi; Muhammad Hafiz
Konversi Vol 10, No 2 (2021): Oktober 2021
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v10i2.11686

Abstract

The issue of the energy crisis and environmental problems due to waste encourage the formation of new fuels from renewable materials such as palm kernel shell biomass (CKS). In other hand, low rank coal (lignite) has low economic value, so it needs to be improved to be used widely. Utilization of lignite and CKS can produce solid products (char) in the form of hybrid coal through the co-pyrolysis process. This study aims to determine the optimum temperature and composition of co-pyrolysis lignite and CKS based on the distribution of the resulting product. The lignite is dried and pulverized to a particle size of 20-50 mesh. CKS cleaned, cut into pieces and sieved to a size of 0.4-2 mm. Then the CKS was dried in an oven at 105oC for 24 hours. Lignite and CKS were mixed with a composition of 15%, 22.5%, and 30% by weight of CKS:lignite. The mixture of materials is put into the co-pyrolysis reactor as much as 200 grams. The co-pyrolysis process was carried out at temperatures of 200ºC, 300ºC, and 400ºC for 1 hour by flowing nitrogen gas into the reactor with a flow rate of 1.5 L/min. The results showed that increasing the mixing ratio of CKS:lignite and co-pyrolysis temperature would increase tar yield while decreasing char yield. Judging from the highest tar yield, the optimum co-pyrolysis temperature was 400oC at 15% optimum mixing ratio, while 200oC and 22.5% were optimum co-pyrolysis temperatures and mixing ratio to obtain the largest char yield. Both tar and char co-pyrolysis products can be an alternative energy source with further processing.
THE EFFECT OF LONG CARBONIZATION TIME ON QUALITY OF CHINESE WATER CHESTNUT ACTIVATED CHARCOAL AS A PEAT WATER BIOFILTER Noor Khamidah; Muhammad Imam Nugraha; Norinayati Norinayati
Konversi Vol 11, No 1 (2022): APRIL 2022
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v11i1.11527

Abstract

The purpose of this study was to determine whether chinese water chestnut (Eleocharis dulcis) could be used as activated charcoal as a peat water biofilter and to determine the effect of carbonization time on the quality of activated charcoal from chinese water chestnut (Eleocharis dulcis). The experimental method used in this study was a single factor Completely Randomized Design (CRD) with 6 treatments, namely differences in carbonization time (30 minutes, 1 hour, 1.5 hours, 2 hours), factory charcoal (positive control) and no treatment. (negative control). The results showed that activated charcoal of chinese water chestnut (Eleocharis dulcis) can be used as a biofilter of peat water and carbonization of 2 hours (A5) is thought to be the most optimal time for the quality of activated charcoal of chinese water chestnut (Eleocharis dulcis) which is indicated by the parameters of ash content of 0.367% and iodine absorption. 1910.126 mg/g.
TECHNICAL PLANNING OF WASTE TREATMENT PLANT (REDUCE REUSE RECYCLE) SEDATI DISTRICT, SIDOARJO Amiruddin Al Mahmudi; Yusrianti Yusrianti; Dyah Ratri N.
Konversi Vol 11, No 1 (2022): APRIL 2022
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v11i1.12808

Abstract

Population development is accompanied by an increase in the volume of waste that arises in an area. Sanitation problems are started by the amount of waste that cannot be handled. Sidoarjo Regency in 2018 had a population of 2,238,069 people with waste generation of 1119 tons/day. Waste processing plays an important role in the problem of waste in Sidoarjo Regency. The coastal part of Sedati District is Kalanganyar Village, Buncitan Village, Cemandi Village, Gisik Cemandi Village, Banjar Kemuning Village, Tambak Cemandi Village, and Segoro Village. In implementing the 3R TPS planning, data on waste generation, volume of waste generation and composition of waste generated by the community are needed every day. The calculation method used in this plan refers to SNI 19-3964-1994. From the data obtained, waste generation is 0.36 kg/person/day and waste volume is 132.93 kg/m3. And it is planned that the 3R TPS will operate for the next 10 years or in 2031. The planned waste management and processing at TPS 3R Sedati District is divided into 2, namely organic waste processed into compost and non-organic waste sold to collectors, and for residual waste that is not processed it is transported to landfill. The area of land required for planning TPS 3R is 1751.5 m2 which is located in Tambak Cemandi Village. The budget plan that must be issued for planning TPS 3R Sedati District is Rp. 3,180,875,000.00.
EFFECT OF EFFECTIVE MICROORGANISMS ADDITION ON METHANE PRODUCTION FROM COFFEE HUSKS Hasrul Anwar; Andhika Sukma; Ridho Ulya
Konversi Vol 11, No 1 (2022): APRIL 2022
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v11i1.11761

Abstract

Coffee husk is a lignocellulosic material which is abundant and can be used to produce biogas. This study compares the production of biogas produced from coffee husk substrate using cow dung and a mixture of cow dung and effective microorganisms. This experiment was carried out for 30 days in an anaerobic batch reactor with a reactor working volume of 3.6 L at mesophilic temperature. The parameters tested in this study were the lignocellulosic content of coffee husks, total solids (TS), volatile solids (VS), volatile fatty acids (VFA), chemical oxygen demand (COD), and the content of biogas produced from both variables. The lignocellulosic compositions obtained from this study were cellulose 65.90%, hemicellulose 24.95%, lignin 0.21%, pectin 0.42%, protein 0.81%, tannins 1.05%, caffeine 0.09%, and polyphenols. The values of Total Solids and Volatile Solids for the two variables are K-KS of 16.78% and 33.98% and K-KSEM of 24.87% and 48.42%, respectively. The total VFA for the two variables is 2.06% (v/v) for K-KS and 2.36% (v/v) for K-KSEM. The COD values for the K-KS and K-KSEM variables were 78.05% and 81.42%, respectively. The composition of biogas for K-KS is CH4 12.35%, CO2 21.68%, and H2 0.32%, while for K-KSEM it is CH4 19.64%, CO2 2.82%, and H2 0.35 %. The methane yields for the two variables, K-KS and K-KSEM, were 0.76 Nm3/kgCODremoval and 1.43 Nm3/kgCODremoval, respectively.Key words: anaerobic digestion, cow dung, rumen fluid, effective microorganism (EM), methane 
THE EFFECT OF AVERRHOA BILIMBI EXTRACT AS NATURAL COAGULANTS ON THE CHARACTERISTICS OF RUBBER Feerzet Achmad; Deviany Deviany
Konversi Vol 11, No 1 (2022): APRIL 2022
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v11i1.12841

Abstract

Rubber is one of Indonesia’s main commodities resulting in a considerable number of people relying their incomes as rubber farmers. However, unstable rubber price proves to be a problem for these farmers. One solution to be offered is an alternative natural coagulant which is easily obtainable and able to produce good quality rubbers. Averrhoa bilimbi with its known acidic properties shows a prospect as a natural coagulant. This study aims to determine the effect of variation in the concentration of Averrhoa bilimbi extract on the characteristics of rubber clone IRR 118 as well as the advantages and disadvantages of using the extract as natural coagulant. The rubber clone used was IRR 118 with various Averrhoa bilimbi etracts of 20%, 40%, 60%, 80% and 100% and 2% synthetic chemical coagulant formic acid as comparison. The coagulant volume was 20 ml for each concentration and the volume of latex used was 100 ml. The characteristics of the rubber tested were TSC, DRC, Po and PRI. The results showed that the highest value of dry rubber content (DRC) was at 100% natural coagulant concentration which is 34% with a total solid content (TSC) value of 37% while the highest Plasticity Retention Index (PRI) value was at 100% concentration, which is 92%. This study exhibits the use of natural coagulant from Averrhoa bilimbi has met the Indonesian Rubber Standard SNI 06-1903-2000. Therefore, Averrhoa bilimbi extract can be used as an alternative coagulant for rubber latex.
EVALUATION OF THE IMPLEMENTATION OF WASTE GENERATION REDUCTION INTO COMPOST WITH WINDROW SYSTEM IN THE TALANG GULO FINAL PROCESSING, JAMBI CITY Mega Muitiara Sari; Andra Puput Marya Ani; I Wayan Koko Suryawan
Konversi Vol 11, No 1 (2022): APRIL 2022
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v11i1.11991

Abstract

Talang Gulo Final Processing Site, Jami City will make efforts to reduce biodegradable waste consisting of leaf waste. The processing process that can be applied is by converting it into compost with an aerobic process with a windrow system. The purpose of this study was to evaluate the composting system and the results of existing waste processing. This research was conducted by direct observation and secondary data collection from the local management inventory. The composition of biodegradable waste in Jambi City consists of 47.4% food waste and 2.1% garden waste. However, the application of food waste is quite difficult to handle because of its characteristics, therefore garden waste is a priority for reduction by the government. The results of monitoring for one month in a row mean that the waste entering the compost facility is 4086 kg/day. The percentage of waste reduction from composting activities in total can be 0.986% of the total waste generation of Jambi City, or 45.426% of the total waste generation of Jambi City's gardens. The final measurement results of compost have met the quality standard of SNI 19-7030-2004 which has been set by the Indonesian government. The value of water content, pH, C – Organic, N – Total, C/N, P2O3, and K2O Total is 13.64%; 7,12; 4.77%; 0.42%; 11.4% 45.01%; and 0.25%, respectively. It is hoped that even though the achievement of waste reduction from this activity is still low, if it is seen from the opportunities for sustainable management and social support from the community and the government, it will reduce waste generation in Jambi City.

Page 20 of 27 | Total Record : 263

 18   19   20   21   22 

Filter by Year

2012 2025


Reset
Filter By Issues
All Issue Vol 14, No 2 (2025): OCTOBER 2025 Vol 14, No 1 (2025): APRIL 2025 Vol 13, No 2 (2024): OKTOBER 2024 Vol 13, No 1 (2024): April 2024 Vol 12, No 2 (2023): OKTOBER 2023 Vol 12, No 1 (2023): April 2023 Vol 11, No 2 (2022): OKTOBER 2022 Vol 11, No 1 (2022): APRIL 2022 Vol 10, No 2 (2021): Oktober 2021 Vol 10, No 1 (2021): April 2021 Vol 9, No 2 (2020): Oktober 2020 Vol 9, No 1 (2020): April 2020 Vol 8, No 2 (2019): Oktober 2019 Vol 8, No 1 (2019): April 2019 Vol 7, No 2 (2018): Oktober 2018 Vol 7, No 1 (2018): April 2018 Vol 7, No 1 (2018): ARTICLE IN PRESS Vol 6, No 2 (2017): Oktober 2017 Vol 6, No 2 (2017): Oktober 2017 Vol 6, No 1 (2017): April 2017 Vol 6, No 1 (2017): April 2017 Vol 5, No 2 (2016): Oktober 2016 Vol 5, No 2 (2016): Oktober 2016 Vol 5, No 1 (2016): April 2016 Vol 5, No 1 (2016): April 2016 Vol 4, No 2 (2015): Oktober 2015 Vol 4, No 2 (2015): Oktober 2015 Vol 4, No 1 (2015): April 2015 Vol 4, No 1 (2015): April 2015 Vol 3, No 2 (2014): Oktober 2014 Vol 3, No 2 (2014): Oktober 2014 Vol 3, No 1 (2014): April 2014 Vol 3, No 1 (2014): April 2014 Vol 2, No 2 (2013): Oktober 2013 Vol 2, No 2 (2013): Oktober 2013 Vol 2, No 1 (2013): April 2013 Vol 2, No 1 (2013): April 2013 Vol 1, No 1 (2012): Oktober 2012 Vol 1, No 1 (2012): Oktober 2012 More Issue