Naresvara Pradipta | Universitas Gadjah Mada (Yogyakarta) (original) (raw)

Papers by Naresvara Pradipta

Pendampingan Inisiasi Usaha Souvenir Berbasis Ecoprint Mangrove Bagi Pengelola Kawasan Ekowisata Desa Tambakrejo, Kabupaten Malang

JAIM (Jurnal Abdi Masyarakat)/Jurnal Abdi Masyarakat, May 30, 2024

Utilization of Casuarina montana Pruning Waste Biomass as Chemical or Energy Resources

Key Engineering Materials, Jun 1, 2020

In Indonesia, Casuarina montana usually planted as a road shading tree or in the home garden. Thi... more In Indonesia, Casuarina montana usually planted as a road shading tree or in the home garden. This tree will be pruned periodically to reduce the amount of the canopy and maintain the beauty of its shape. Pruning biomass usually consists of the tip of the stem, branches, twigs, and leaves. The biomass has potency for energy or chemicals sources. This study aims to know about energy potential of various types of C. montana biomass and charcoal properties in different carbonization temperature. Six types of biomass from pruning waste of C. montana were used as samples. Branch has high potency as α-cellulose source, while bark including twig bark, branch bark, or stem bark have high potency as lignin source. When it is used as direct fuel (firewood), all biomass of C. montana possess quite high calorific value. When it is converted to be charcoal, temperature of 300°C is good for carbonizing the biomass twig, twig bark, branch bark, and stem bark, while biomass branch and stem need temperature of 400°C.

Effect of Simultaneous Saccharification and Fermentation (SSF) Time on Ethanol Production from Spent Medium of Oyster Mushroom (<i>Pleurotus ostreatus</i>)

Key Engineering Materials, Apr 1, 2020

Bioethanol is considered as the most promising prospective renewable energy source. One of the mo... more Bioethanol is considered as the most promising prospective renewable energy source. One of the most potential lignocellulose material for bioethanol feedstock is spent media (SM) of edible mushroom.Pleurotus ostreatusis more selective to degrade lignin than holocellulose component, therefore the SM is very compatible as a bioethanol feedstock. This study was observed the influence of variation of cultivation time of oyster mushroom (P.ostreatus) into the SM chemical content and its ethanol production yield by using simultaneous saccharification and fermentation method. The results showed that the difference of cultivation time did not show the significant result on SM chemical content, except the hot water soluble extractive content. The highest hot water soluble extractive content was found in SM with 110 days of cultivation time (27.68%). The highest hydrolysis rate was found at 90 days of cultivation time (15.65%) and 48 and 72 hours saccharification time (14.77% and 14.78%). The highest reducing sugar content was found at 110 days of cultivation time (4.89 g/L). The highest ethanol content was found in SM with a combination of 90 days cultivation time and 48 hours saccharification time (1.696 g/L). The 90 days cultivation time was enough to produce SM that can be used as raw material for bio-ethanol production.

Biodiversitas, Feb 25, 2023

Anaxagorea luzonensis is one of the critical plant collections from the Annonaceae family, with o... more Anaxagorea luzonensis is one of the critical plant collections from the Annonaceae family, with only one specimen in Purwodadi Botanic Garden (PBG). In protecting these plants, it is necessary to know the process of flowering and fruiting through the phenological process. This research is expected to observe plant propagation, physiology, environmental response, and increased reproductive success. The aim of this research is to know the details of flowering and fruiting phenology stages, determine reproductive success, and explain the floral biology of A. luzonensis. Research on the flowering and fruiting phenology of A. luzonensis was carried out from December 2021-November 2022 in one season at PBG. The method is observative, including changes in color, shape, and size of flowers and fruit in each phenological stage. In addition, the method includes the count of reproductive success and observation of the A. luzonensis flower. This study's results stated that the flowering and fruiting phenology of A. luzonensis experienced a shorter flowering time than fruiting time and a low percentage (<30%) of reproductive success. Flowering stages are divided into five stages, i.e. initiation, flower bud, before bloom, bloom, and anthesis; fruiting stages are divided into three stages, i.e. immature-sized, mature-sized, and ripe fruit, which occurred in period 73-121 ± 85 days. Environmental and genetic factors cause the low value of reproductive success. This research can be useful for the conservation strategy of A. luzonensis, especially for reproduction biology and seed conservation.

Biodiversitas Journal of Biological Diversity

Anaxagorea luzonensis is one of the critical plant collections from the Annonaceae family, with o... more Anaxagorea luzonensis is one of the critical plant collections from the Annonaceae family, with only one specimen in Purwodadi Botanic Garden (PBG). In protecting these plants, it is necessary to know the process of flowering and fruiting through the phenological process. This research is expected to observe plant propagation, physiology, environmental response, and increased reproductive success. The aim of this research is to know the details of flowering and fruiting phenology stages, determine reproductive success, and explain the floral biology of A. luzonensis. Research on the flowering and fruiting phenology of A. luzonensis was carried out from December 2021-November 2022 in one season at PBG. The method is observative, including changes in color, shape, and size of flowers and fruit in each phenological stage. In addition, the method includes the count of reproductive success and observation of the A. luzonensis flower. This study's results stated that the flowering and fruiting phenology of A. luzonensis experienced a shorter flowering time than fruiting time and a low percentage (<30%) of reproductive success. Flowering stages are divided into five stages, i.e. initiation, flower bud, before bloom, bloom, and anthesis; fruiting stages are divided into three stages, i.e. immature-sized, mature-sized, and ripe fruit, which occurred in period 73-121 ± 85 days. Environmental and genetic factors cause the low value of reproductive success. This research can be useful for the conservation strategy of A. luzonensis, especially for reproduction biology and seed conservation.

Utilization of Casuarina montana Pruning Waste Biomass as Chemical or Energy Resources

Key Engineering Materials, 2020

In Indonesia, Casuarina montana usually planted as a road shading tree or in the home garden. Thi... more In Indonesia, Casuarina montana usually planted as a road shading tree or in the home garden. This tree will be pruned periodically to reduce the amount of the canopy and maintain the beauty of its shape. Pruning biomass usually consists of the tip of the stem, branches, twigs, and leaves. The biomass has potency for energy or chemicals sources. This study aims to know about energy potential of various types of C. montana biomass and charcoal properties in different carbonization temperature. Six types of biomass from pruning waste of C. montana were used as samples. Branch has high potency as α-cellulose source, while bark including twig bark, branch bark, or stem bark have high potency as lignin source. When it is used as direct fuel (firewood), all biomass of C. montana possess quite high calorific value. When it is converted to be charcoal, temperature of 300°C is good for carbonizing the biomass twig, twig bark, branch bark, and stem bark, while biomass branch and stem need tem...

INTERNATIONAL ENERGY CONFERENCE ASTECHNOVA 2019, 2020

Using lignocellulose materials as bioethanol feed stocks requires an efficient pretreatment proce... more Using lignocellulose materials as bioethanol feed stocks requires an efficient pretreatment process to reduce cellulose resistance. Among various types of pretreatment, biological pretreatment is a low-cost pretreatment technique. The edible white-rot fungus is a promising candidate for pretreatment of lignocellulosic biomass. This research used media waste from 3 types of edible mushrooms namely Ear, Lingzhi, and Oyster which has been cultivated for 90, 100, 110 days. The experiment results showed that the cultivation process can decrease the media weight up to 24.22% as well as reduce the content of chemical media components significantly. The interaction between the types of fungi and cultivation period provides a significant interaction on the extractive levels of ethanol-toluene, holocellulose, α-cellulose, hemicellulose, and acid soluble lignin. A hydrolysis rate of cultivation media waste on acid hydrolysis method is 0.28-28.7% while enzyme hydrolysis 9.3-25.64%. The results of t-test analysis between acid hydrolysis method and an enzyme showed significant difference in reducing sugar content. The average yield of reducing sugar levels of acid hydrolysis method (1.18 mg/ml) is lower than reducing sugar levels of enzyme hydrolysis method (3.5 mg/ml). The highest reducing sugar content was produced from Lingzhi mushroom waste media with cultivation period of 100 days and enzyme hydrolysis method, which amounted to 4.34 mg/ml.

Jurnal Pengabdian Kepada Masyarakat, 2017

Mushroom farmer society Sedyo Lestari is located in the Argosari, Sedayu, Bantul. The high demand... more Mushroom farmer society Sedyo Lestari is located in the Argosari, Sedayu, Bantul. The high demand for mushrooms media (baglog) is a good business opportunities for this farmer society. But the process of baglog making requires a lot of energy in the form of firewood, especially for sterilization process of the baglog. On the other hand, the mushroom cultivation process itself remains the waste that can be used as fuel for the sterilization process. So far Sedyo Lestari farmer society members do not have the technology to used the mushroom cultivation waste as a fuel. Therefore, it is imperative to transfer knowledge of biomass briquetting technique. The method used in this activities are socialization, training, and mentoring by starting with the introduction of briquettes and briquetting technology. Subsequently made briquette-making machines followed by training briquette making. Mentoring and socialization were also made to all members of farmer society. Outcome of these activiti...

Effect of Simultaneous Saccharification and Fermentation (SSF) Time on Ethanol Production from Spent Medium of Oyster Mushroom (Pleurotus ostreatus)

Key Engineering Materials, 2020

Bioethanol is considered as the most promising prospective renewable energy source. One of the mo... more Bioethanol is considered as the most promising prospective renewable energy source. One of the most potential lignocellulose material for bioethanol feedstock is spent media (SM) of edible mushroom. Pleurotus ostreatus is more selective to degrade lignin than holocellulose component, therefore the SM is very compatible as a bioethanol feedstock. This study was observed the influence of variation of cultivation time of oyster mushroom (P.ostreatus) into the SM chemical content and its ethanol production yield by using simultaneous saccharification and fermentation method. The results showed that the difference of cultivation time did not show the significant result on SM chemical content, except the hot water soluble extractive content. The highest hot water soluble extractive content was found in SM with 110 days of cultivation time (27.68%). The highest hydrolysis rate was found at 90 days of cultivation time (15.65%) and 48 and 72 hours saccharification time (14.77% and 14.78%). T...

Effect of Simultaneous Saccharification and Fermentation (SSF) Time on Ethanol Production from Spent Medium of Oyster Mushroom (Pleurotus ostreatus)

Key Engineering Materials, 2020

Bioethanol is considered as the most promising prospective renewable energy source. One of the mo... more Bioethanol is considered as the most promising prospective renewable energy source. One of the most potential lignocellulose material for bioethanol feedstock is spent media (SM) of edible mushroom. Pleurotus ostreatus is more selective to degrade lignin than holocellulose component, therefore the SM is very compatible as a bioethanol feedstock. This study was observed the influence of variation of cultivation time of oyster mushroom (P.ostreatus) into the SM chemical content and its ethanol production yield by using simultaneous saccharification and fermentation method. The results showed that the difference of cultivation time did not show the significant result on SM chemical content, except the hot water soluble extractive content. The highest hot water soluble extractive content was found in SM with 110 days of cultivation time (27.68%). The highest hydrolysis rate was found at 90 days of cultivation time (15.65%) and 48 and 72 hours saccharification time (14.77% and 14.78%). T...

Kebutuhan akan teknologi sudah menjadi prioritas di zaman sekarang ini seperti : laptop, handphon... more Kebutuhan akan teknologi sudah menjadi prioritas di zaman sekarang ini seperti : laptop, handphone, tablet, komputer dan sebagainya. Namun dibalik kemudahan teknologi yang telah kita capai. Terdapat kasus-kasus yang berhubungan dengan penggunaan merk pada benda-benda tersebut, salah satunya seperti Perusahaan Apple dengan Proview Technology Apple Terancam Kehilangan Pangsa Pasar iPad di China

Pendampingan Inisiasi Usaha Souvenir Berbasis Ecoprint Mangrove Bagi Pengelola Kawasan Ekowisata Desa Tambakrejo, Kabupaten Malang

JAIM (Jurnal Abdi Masyarakat)/Jurnal Abdi Masyarakat, May 30, 2024

Utilization of Casuarina montana Pruning Waste Biomass as Chemical or Energy Resources

Key Engineering Materials, Jun 1, 2020

In Indonesia, Casuarina montana usually planted as a road shading tree or in the home garden. Thi... more In Indonesia, Casuarina montana usually planted as a road shading tree or in the home garden. This tree will be pruned periodically to reduce the amount of the canopy and maintain the beauty of its shape. Pruning biomass usually consists of the tip of the stem, branches, twigs, and leaves. The biomass has potency for energy or chemicals sources. This study aims to know about energy potential of various types of C. montana biomass and charcoal properties in different carbonization temperature. Six types of biomass from pruning waste of C. montana were used as samples. Branch has high potency as α-cellulose source, while bark including twig bark, branch bark, or stem bark have high potency as lignin source. When it is used as direct fuel (firewood), all biomass of C. montana possess quite high calorific value. When it is converted to be charcoal, temperature of 300°C is good for carbonizing the biomass twig, twig bark, branch bark, and stem bark, while biomass branch and stem need temperature of 400°C.

Effect of Simultaneous Saccharification and Fermentation (SSF) Time on Ethanol Production from Spent Medium of Oyster Mushroom (<i>Pleurotus ostreatus</i>)

Key Engineering Materials, Apr 1, 2020

Bioethanol is considered as the most promising prospective renewable energy source. One of the mo... more Bioethanol is considered as the most promising prospective renewable energy source. One of the most potential lignocellulose material for bioethanol feedstock is spent media (SM) of edible mushroom.Pleurotus ostreatusis more selective to degrade lignin than holocellulose component, therefore the SM is very compatible as a bioethanol feedstock. This study was observed the influence of variation of cultivation time of oyster mushroom (P.ostreatus) into the SM chemical content and its ethanol production yield by using simultaneous saccharification and fermentation method. The results showed that the difference of cultivation time did not show the significant result on SM chemical content, except the hot water soluble extractive content. The highest hot water soluble extractive content was found in SM with 110 days of cultivation time (27.68%). The highest hydrolysis rate was found at 90 days of cultivation time (15.65%) and 48 and 72 hours saccharification time (14.77% and 14.78%). The highest reducing sugar content was found at 110 days of cultivation time (4.89 g/L). The highest ethanol content was found in SM with a combination of 90 days cultivation time and 48 hours saccharification time (1.696 g/L). The 90 days cultivation time was enough to produce SM that can be used as raw material for bio-ethanol production.

Biodiversitas, Feb 25, 2023

Anaxagorea luzonensis is one of the critical plant collections from the Annonaceae family, with o... more Anaxagorea luzonensis is one of the critical plant collections from the Annonaceae family, with only one specimen in Purwodadi Botanic Garden (PBG). In protecting these plants, it is necessary to know the process of flowering and fruiting through the phenological process. This research is expected to observe plant propagation, physiology, environmental response, and increased reproductive success. The aim of this research is to know the details of flowering and fruiting phenology stages, determine reproductive success, and explain the floral biology of A. luzonensis. Research on the flowering and fruiting phenology of A. luzonensis was carried out from December 2021-November 2022 in one season at PBG. The method is observative, including changes in color, shape, and size of flowers and fruit in each phenological stage. In addition, the method includes the count of reproductive success and observation of the A. luzonensis flower. This study's results stated that the flowering and fruiting phenology of A. luzonensis experienced a shorter flowering time than fruiting time and a low percentage (<30%) of reproductive success. Flowering stages are divided into five stages, i.e. initiation, flower bud, before bloom, bloom, and anthesis; fruiting stages are divided into three stages, i.e. immature-sized, mature-sized, and ripe fruit, which occurred in period 73-121 ± 85 days. Environmental and genetic factors cause the low value of reproductive success. This research can be useful for the conservation strategy of A. luzonensis, especially for reproduction biology and seed conservation.

Biodiversitas Journal of Biological Diversity

Anaxagorea luzonensis is one of the critical plant collections from the Annonaceae family, with o... more Anaxagorea luzonensis is one of the critical plant collections from the Annonaceae family, with only one specimen in Purwodadi Botanic Garden (PBG). In protecting these plants, it is necessary to know the process of flowering and fruiting through the phenological process. This research is expected to observe plant propagation, physiology, environmental response, and increased reproductive success. The aim of this research is to know the details of flowering and fruiting phenology stages, determine reproductive success, and explain the floral biology of A. luzonensis. Research on the flowering and fruiting phenology of A. luzonensis was carried out from December 2021-November 2022 in one season at PBG. The method is observative, including changes in color, shape, and size of flowers and fruit in each phenological stage. In addition, the method includes the count of reproductive success and observation of the A. luzonensis flower. This study's results stated that the flowering and fruiting phenology of A. luzonensis experienced a shorter flowering time than fruiting time and a low percentage (<30%) of reproductive success. Flowering stages are divided into five stages, i.e. initiation, flower bud, before bloom, bloom, and anthesis; fruiting stages are divided into three stages, i.e. immature-sized, mature-sized, and ripe fruit, which occurred in period 73-121 ± 85 days. Environmental and genetic factors cause the low value of reproductive success. This research can be useful for the conservation strategy of A. luzonensis, especially for reproduction biology and seed conservation.

Utilization of Casuarina montana Pruning Waste Biomass as Chemical or Energy Resources

Key Engineering Materials, 2020

In Indonesia, Casuarina montana usually planted as a road shading tree or in the home garden. Thi... more In Indonesia, Casuarina montana usually planted as a road shading tree or in the home garden. This tree will be pruned periodically to reduce the amount of the canopy and maintain the beauty of its shape. Pruning biomass usually consists of the tip of the stem, branches, twigs, and leaves. The biomass has potency for energy or chemicals sources. This study aims to know about energy potential of various types of C. montana biomass and charcoal properties in different carbonization temperature. Six types of biomass from pruning waste of C. montana were used as samples. Branch has high potency as α-cellulose source, while bark including twig bark, branch bark, or stem bark have high potency as lignin source. When it is used as direct fuel (firewood), all biomass of C. montana possess quite high calorific value. When it is converted to be charcoal, temperature of 300°C is good for carbonizing the biomass twig, twig bark, branch bark, and stem bark, while biomass branch and stem need tem...

INTERNATIONAL ENERGY CONFERENCE ASTECHNOVA 2019, 2020

Using lignocellulose materials as bioethanol feed stocks requires an efficient pretreatment proce... more Using lignocellulose materials as bioethanol feed stocks requires an efficient pretreatment process to reduce cellulose resistance. Among various types of pretreatment, biological pretreatment is a low-cost pretreatment technique. The edible white-rot fungus is a promising candidate for pretreatment of lignocellulosic biomass. This research used media waste from 3 types of edible mushrooms namely Ear, Lingzhi, and Oyster which has been cultivated for 90, 100, 110 days. The experiment results showed that the cultivation process can decrease the media weight up to 24.22% as well as reduce the content of chemical media components significantly. The interaction between the types of fungi and cultivation period provides a significant interaction on the extractive levels of ethanol-toluene, holocellulose, α-cellulose, hemicellulose, and acid soluble lignin. A hydrolysis rate of cultivation media waste on acid hydrolysis method is 0.28-28.7% while enzyme hydrolysis 9.3-25.64%. The results of t-test analysis between acid hydrolysis method and an enzyme showed significant difference in reducing sugar content. The average yield of reducing sugar levels of acid hydrolysis method (1.18 mg/ml) is lower than reducing sugar levels of enzyme hydrolysis method (3.5 mg/ml). The highest reducing sugar content was produced from Lingzhi mushroom waste media with cultivation period of 100 days and enzyme hydrolysis method, which amounted to 4.34 mg/ml.

Jurnal Pengabdian Kepada Masyarakat, 2017

Mushroom farmer society Sedyo Lestari is located in the Argosari, Sedayu, Bantul. The high demand... more Mushroom farmer society Sedyo Lestari is located in the Argosari, Sedayu, Bantul. The high demand for mushrooms media (baglog) is a good business opportunities for this farmer society. But the process of baglog making requires a lot of energy in the form of firewood, especially for sterilization process of the baglog. On the other hand, the mushroom cultivation process itself remains the waste that can be used as fuel for the sterilization process. So far Sedyo Lestari farmer society members do not have the technology to used the mushroom cultivation waste as a fuel. Therefore, it is imperative to transfer knowledge of biomass briquetting technique. The method used in this activities are socialization, training, and mentoring by starting with the introduction of briquettes and briquetting technology. Subsequently made briquette-making machines followed by training briquette making. Mentoring and socialization were also made to all members of farmer society. Outcome of these activiti...

Effect of Simultaneous Saccharification and Fermentation (SSF) Time on Ethanol Production from Spent Medium of Oyster Mushroom (Pleurotus ostreatus)

Key Engineering Materials, 2020

Bioethanol is considered as the most promising prospective renewable energy source. One of the mo... more Bioethanol is considered as the most promising prospective renewable energy source. One of the most potential lignocellulose material for bioethanol feedstock is spent media (SM) of edible mushroom. Pleurotus ostreatus is more selective to degrade lignin than holocellulose component, therefore the SM is very compatible as a bioethanol feedstock. This study was observed the influence of variation of cultivation time of oyster mushroom (P.ostreatus) into the SM chemical content and its ethanol production yield by using simultaneous saccharification and fermentation method. The results showed that the difference of cultivation time did not show the significant result on SM chemical content, except the hot water soluble extractive content. The highest hot water soluble extractive content was found in SM with 110 days of cultivation time (27.68%). The highest hydrolysis rate was found at 90 days of cultivation time (15.65%) and 48 and 72 hours saccharification time (14.77% and 14.78%). T...

Effect of Simultaneous Saccharification and Fermentation (SSF) Time on Ethanol Production from Spent Medium of Oyster Mushroom (Pleurotus ostreatus)

Key Engineering Materials, 2020

Bioethanol is considered as the most promising prospective renewable energy source. One of the mo... more Bioethanol is considered as the most promising prospective renewable energy source. One of the most potential lignocellulose material for bioethanol feedstock is spent media (SM) of edible mushroom. Pleurotus ostreatus is more selective to degrade lignin than holocellulose component, therefore the SM is very compatible as a bioethanol feedstock. This study was observed the influence of variation of cultivation time of oyster mushroom (P.ostreatus) into the SM chemical content and its ethanol production yield by using simultaneous saccharification and fermentation method. The results showed that the difference of cultivation time did not show the significant result on SM chemical content, except the hot water soluble extractive content. The highest hot water soluble extractive content was found in SM with 110 days of cultivation time (27.68%). The highest hydrolysis rate was found at 90 days of cultivation time (15.65%) and 48 and 72 hours saccharification time (14.77% and 14.78%). T...

Kebutuhan akan teknologi sudah menjadi prioritas di zaman sekarang ini seperti : laptop, handphon... more Kebutuhan akan teknologi sudah menjadi prioritas di zaman sekarang ini seperti : laptop, handphone, tablet, komputer dan sebagainya. Namun dibalik kemudahan teknologi yang telah kita capai. Terdapat kasus-kasus yang berhubungan dengan penggunaan merk pada benda-benda tersebut, salah satunya seperti Perusahaan Apple dengan Proview Technology Apple Terancam Kehilangan Pangsa Pasar iPad di China