Found 6 Documents

Biogas Production from Tofu Industrial Wastewater with Effective Microorganisms 4 (EM-4) as Biocatalyst Hidayat, Mohamad Rusdi
Biopropal Industri Vol 3, No 1 (2012)
Publisher : Balai Riset dan Standardisasi Industri Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (54.186 KB)


The addition of Effective Microorganims 4 (EM-4) activator against the biogas  production was done to utilize the tofu industrial wastewater as one of the substrate for biogas production so it can increase its economic value. The aim of this research was to determine the optimum EM-4 concentration as a biogas activator using tofu industrial wastewater as a substrate. This research was conducted by adding the EM-4 activator with different concentrations of 0.25%, 0.50%, 0.75%, and 1% into the 20 litre of tofu wastewater substrate. The process of biogas formation was observed through a pressure reading on pressure gauge tools on digester. The burning of biogas is done after the presure became constant. The optimal EM-4 activator addition for 20 litre of tofu wastewater substrate was 0.75%, with burning time is 14 minutes 56 seconds.
Search Region of Origin Honey Bee A. mellifera in Indonesia Region Using Mitochondrial DNA intergenic cox1/cox2 Hidayat, Mohamad Rusdi
Biopropal Industri Vol 2, No 2 (2011)
Publisher : Balai Riset dan Standardisasi Industri Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar


Apis mellifera is a favourite honey bee for the beekeepers throughout many countries. This species comprise of 24 subspecies. Based on phylogeography and morphometric evidences, these subspecies have been grouped into four lineage; namely the African (A), Western and Northern Europe (M), Southeastern Europe (C), and Near Eastern (O). Apis mellifera have been imported to Indonesia since 1972, and mostly from Australia. However, until recently there are no data about the A. mellifera subspecies and the origin. Therefore the objective of this research is to determine the lineage of A. mellifera in Indonesia based on mtDNA intergenic region between cox1/cox2 genes. In this region there are two DNA fragments, P and Q fragnant, that can be used to determine the A. mellifera lineage. The methodology used consist of samples collection, DNA isolation, DNA amplification, DNA restriction using DraI enzyme, DNA sequencing, and DNA alignment using Clustal X and MEGA spftwares. DNA fragment amplified by using E2 and H1 primer revealed a 863 bp. Digestion of the region with the DraI restriction enzyme revealed one haplotype, which consist of five DNA fragments. Based on DNA sequences and DNA alignment, A. mellifera in Indonesia was homologue with the C lineage. Its subspecies is A. m. ligustica that lived natively in Italy, they were imported to Indonesia from Australia
Pretreatment Technologies of Lignocellulosic Materials in Bioethanol Production Process Hidayat, Mohamad Rusdi
Biopropal Industri Vol 4, No 1 (2013)
Publisher : Balai Riset dan Standardisasi Industri Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (315.531 KB)


Bioethanol is one type of biofuel that developed significantly. The utilization of bioethanol is not only limited for fuel, but also could be used as material for various industries such as pharmaceuticals, cosmetics, and food. With wide utilization and relatively simple production technology has made bioethanol as the most favored biofuel currently. The use of lignocellulosic biomass, microalgae, seaweeds, even GMO (Genetically modified organisms) as substrates for bioethanol production has been widely tested. Differences in the materials eventually led to change in the production technology used. Pretreatment technology in the bioethanol production using lignocellulosic currently experiencing rapid development. It is a key process and crucial for the whole next steps. Based on the advantages and disadvantages from all methods, steam explotion and liquid hot water methods are the most promising  pretreatment technology available.
KARAKTERISASI BAKTERI SELULOLITIK SIMBION RAYAP ASAL TAMAN NASIONAL BUKIT BAKA BUKIT RAYA, KALIMANTAN BARAT (Characterization of Cellulolytic Bacteria Termite Symbiont from Bukit Baka Bukit Raya National Park, West Kalimantan) Hidayat, Mohamad Rusdi; Hidayati, Hidayati
Jurnal Hasil Penelitian Industri Vol 27, No 2 (2014)
Publisher : Baristand Industri Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (23.353 KB)


Cellulase is the third largest industrial enzyme worldwide. This enzyme isproduced by microorganisms. Termite is one of the arthropods that could utilize symbioticmicroorganisms in their gut to digest lignocellulose. The purpose of this study was tocharacterize the cellulolytic bacteria that have been previously isolated from termites gutoriginated from the Bukit Baka Bukit Raya National Park. Isolates used were isolateMRH.13.S, isolate MRH.13.AF, and isolate MRH.13.O2. Characterizations conductedwere on the determination of the isolates growth curve, as well as the determination of theoptimum pH and temperature. The results showed that isolate MRH.13.S have an optimumtime at 36 hours. While isolate MRH.13.AF isolates had optimum time at 24 hours. Bothisolates have optimum pH in acidic conditions, and optimum temperature of 60˚C. Andisolates MRH.13.O2 have an optimum time of 48 hours, with an optimum pH in acidic toneutral and optimum temperature of 60˚C.
Potential Uses of Spent Mushroom Substrate Containing Palm Pressed Fiber as Organic Fertilizer: Study on Chemical Analysis and Lignocellulose Biodegradation Hidayat, Mohamad Rusdi
Waste Technology Vol 5, No 1 (2017)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (34.198 KB) | DOI: 10.12777/wastech.5.1.%p


One of the applications of palm pressed fiber (PPF), which generated from palm oil industry, is as an alternative medium for mushroom production. Increased usage of PPF by mushroom farms ultimately would raise the mushroom substrate waste or commonly called as spent mushroom substrate (SMS) containing PPF. Although beneficial effects of SMS on the crops growth have been investigated in recent years, the SMS characterization studies are still limited. SMS characterization is required since its properties are determined by many factors, and its characteristics could affect its effectiveness as organic fertilizer. Therefore, the aim of this study was to characterize fresh PPF based-SMS from Pleurotus ostreatus cultivation. All parameters tested were performed based on the regulation of the Indonesian Ministry of Agriculture No. 70-2011 about organic fertilizer. Moreover, lignocellulose biodegradation analysis of the SMS before and after mushroom cultivation also conducted. Results showed that fresh SMS composed of 50% and 100% of PPF meet the quality standards as organic fertilizer. This finding suggests that fresh PPF-based SMS could be applied directly as organic fertilizer without further composting process. 
Journal of Degraded and Mining Lands Management Vol 7, No 1 (2019)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2019.071.1935


Pawan and Jelai Rivers are two of the three main rivers in Ketapang Regency, West Kalimantan. The extensive growth of palm oil industry in Ketapang might affect the aquatic environment, especially the rivers, due to excessive uses of water. Therefore, the aims of this study were to examine the effect of palm oil industry on the changes in water quality status of Pawan and Jelai Rivers in Ketapang regency during 2012-2016 and to identify critical parameters that might determine the water quality status in the two rivers. This study used the laboratory testing results of Pawan and Jelai Rivers, which were carried out periodically by various companies/institutions. There were 24 physical, chemical, and microbiological parameters that were analyzed to determine the water quality status using STORET method. Critical parameters were determined by comparing parameters analyzed with their threshold values. The results revealed that Pawan and Jelai Rivers passing through oil palm plantations and palm oil mills were moderately to highly polluted in 2012, 2014 and 2016. Critical parameters of the river water quality are BOD, COD, Cl2, phenol, Fe, and total Coliform.