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Konversi
Published by Universitas Lambung Mangkurat
ISSN : 23023686     EISSN : 25413481     DOI : -
Core Subject : Education,
Education
Arjuna Subject : -
Articles 8 Documents
 1 
Search results for , issue "Vol 11, No 1 (2022): APRIL 2022" : 8 Documents clear
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.
CHARACTERISTICS OF EDIBLE FILM (LAYER BY LAYER) FROM CARRAGEENAN-CHITOSAN WITH THE ADDITION OF BELIMBING WULUH LEAF EXTRACT AS ANTIOXIDANT SUBSTANCE Rahmah Isnaeni; Anisa Fitri; Desi Nurandini; Arif Tirtana; Muhmmad Zeva Prayitno
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.v11i1.13081

Abstract

Packaging use from synthetic materials can have a negative impact for environment. One of the steps to reduce this impact with edible film packaging uses. Film can be defined as a thin layer of material, that usually composed by a polymer that allows for mechanical strengthening of a structured stand. The quality that continues to be improved from the edible film is antioxidant activity, namely by adding antioxidant substances such as flavonoids and phenols from starfruit leaf extract. As well as improving its mechanical quality by adding shrimp shell chitosan and using the layer by layer method. The purpose of this research is to find out characteristics of edible film from carrageenan-chitosan layer by layer and find the best results from the addition of different concentrations of chitosan and Belimbing Wuluh leaf extract. The variation that will be carried out is the addition of Belimbing Wuluh leaf extract by 0.2%, 0.4% and 0.6% and chitosan by 1.5%, 2% and 2.5%. The results showed that the best formula of edible film was made from 2.5% chitosan concentration and 0.6% Belimbing Wuluh leaf extract. The results of test are the thickness test is 0.21 mm, the tensile strength is 2.87 MPa, the elongation at break is 13.6673%, the water vapor permeability is 2.1682 g/m2h and the antioxidant value in terms of fruit weight loss is 4.01%. 
THE KINETIC STUDY OF METHYLENE BLUE ADSORPTION USING THE RED FRUIT WASTE BIOCHAR Yuni Rosita; Ahmad Tawfiequrrahman Yuliansyah; Rochim Bakti Cahyono
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.v11i1.12338

Abstract

Methylene blue is one of the dyes often used in the textile industry. This dye is toxic which causes environmental pollution and health problems for humans and animals. In this research, adsorption of methylene blue dye was carried out by using an adsorbent in the form of red fruit waste biochar in concentration variations (50, 100, and 150 ppm) and contact times (0, 20, 40, 60, 80, 100 and 120 minutes). The kinetics review modeling was based on the pseudo first order and pseudo second order to determine the adsorption capacity of methylene blue with red fruit waste biochar. The adsorption equation was evaluated using the Langmuir adsorption isotherm and the Freundlich adsorption isotherm. The results showed that the most suitable adsorption equilibrium model followed the Langmuir adsorption isotherm with an equilibrium constant (K) is 0.0510 and the maximum adsorption capacity (Qm) is 0.0048 mg/g. The kinetics model of the methylene blue adsorption reaction based on the pseudo second order with the value of k is 0.6973 min-1 and a relation coefficient value of R2 = 1.
REDUCTION OF CHROMIUM ION (Cr6+) WITH ION EXCHANGE RESIN IN LIQUID WASTE OF BATIK Abdurrahman Wahid; Neno Nidia Lifiana; Soemargono Soemargono; Nove Kartika Erliyanti
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.v11i1.12768

Abstract

Industri batik tergolong industri dalam jumlah besar dan berbahaya. Salah satu limbah yang dihasilkan adalah limbah cair yang mengandung ion krom (Cr 6+). Cairan limbah yang dikeluarkan sangat keruh, berwarna, dan memiliki pengelolaan yang busuk sehingga menimbulkan masalah serius bagi badan air, masyarakat, dan lingkungan. Limbah tanpa perlakuan khusus dibuang ke lingkungan. Sehingga metode pertukaran ion dapat mengurangi pencemaran lingkungan akibat limbah industri batik. Penelitian ini bertujuan untuk mengetahui pengaruh resin dalam menurunkan kandungan ion kromium pada limbah cair industri batik dengan menggunakan metode pertukaran ion. Yaitu dengan menggunakan dua kondisi operasi yang divariasikan yaitu berat resin (40, 60, 80, 100, dan 120 gram) dan kecepatan pengadukan (150, 175, 200, 225, dan 250 rpm). Ion kromium yang bermuatan positif akan bertukar dengan H +ion yang ditemukan dalam resin dowex. Sehingga kandungan krom pada limbah cair batik dapat dikurangi. Hasil tersebut diperoleh dari kecepatan pengadukan dan berat resin yang digunakan. Penurunan kandungan ion chromium tertinggi terjadi pada kecepatan pengaduk 250 rpm dengan berat resin 120 gram sebesar 97,86%.

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