scholarly journals PERBANDINGAN YIELD NERACA MASSA HASIL PRETREATMENT TIGA JENIS LIMBAH LIGNOSELULOSA DALAM MEMPRODUKSI POLISAKARIDA MENGGUNAKAN TEKNIK KIMIAWI

2017 ◽  
Vol 17 (2) ◽  
pp. 135
Author(s):  
Gading Wilda Aniriani ◽  
Nurul Fitria Apriliani
Keyword(s):  
Mass Balance ◽  
Rice Straw ◽  
Research Method ◽  
Chemical Pretreatment ◽  
Lignocellulosic Waste ◽  
Corn Cob ◽  
Main Ingredient ◽  
Xylan Content

PERBANDINGAN YIELD NERACA MASSA HASIL PRETREATMENT TIGA JENIS LIMBAH LIGNOSELULOSA DALAM MEMPRODUKSI POLISAKARIDA MENGGUNAKAN TEKNIK KIMIAWI ABSTRAKLimbah lignoselulosa merupakan jenis limbah yang mengandung lignin, selulosa dan hemiselulosa (xilan). Pada lignoselulosa, senyawa yang dapat dimanfaatkan adalah hemiselulosa dan selulosa, sedangkan lignin dihilangkan. Hemiselulosa dan selulosa sebagai polisakarida dapat digunakan sebagai substrat dalam produksi enzim maupun hidrolisis secara kimia, proses tersebut dilakukan untuk mendapatkan gula yang lebih sederhana. Penelitian sebelumnya telah dilakukan ekstraksi xilan dari ampas tebu, hasil samping dari ekstraksi tersebut adalah selulosa. Oleh karena itu, penelitian ini telah membandingkan hasil ekstraksi xilan dan selulosa dalam satu jenis limbah dan membandingkan hasil keduanya diantara 3 jenis limbah lignoselulosa menggunakan metode yang sama. Penelitian ini bertujuan untuk mengekstraksi polisakarida xilan dan selulosa yang terkandung di dalam limbah ampas tebu, tongkol jagung dan jerami padi. Metode penelitian yang digunakan adalah pretreatment secara kimiawi yakni delignifikasi dengan 1 % NaOCl (v/v), ekstraksi xilan dan selulosa dengan metode alkali menggunakan 15 % NaOH pekat dan purifikasi xilan dengan 4% NaOH (v/v). Adapun target yang telah dicapai adalah perolehan polisakarida terbanyak akan digunakan sebagai bahan utama untuk memproduksi enzim. Hasil perolehan yield pada masing-masing neraca massa menunjukkan bahwa, jumlah rendemen xilan terbanyak yaitu jerami sebanyak 110 g dengan penurunan massa dari proses sebelumnya sebesar 61,5%, sedangkan untuk rendemen selulosa diperoleh juga oleh jerami yaitu sebanyak 330 g dengan penurunan massa dari proses sebelumnya sebesar 39,5% . Hal tersebut menunjukkan bahwa jumlah terbanyak pada rendemen xilan berbanding lurus dengan jumlah selulosa. Kesimpulan tersebut di perkuat dengan hasil pada dua jenis limbah lainnya, yakni berbanding lurus. Perolehan rendemen hasil purifikasi terbanyak yaitu ampas tebu (bagas) sebesar 86 gr dengan persentase penurunan massa hanya sebesar 14%.Kata kunci: Lignoselulosa, Delignifikasi, Ekstraksi, Xilan, Selulosa. COMPARISON OF YIELD BALANCE MASS RESULT OF PRETREATMENTT THREE TYPES OF LIGNOSELULOSA WASTE IN PRODUCING POLYSACCHARIDE USING CHEMICAL ENGINEERINGABSTRACTLignocellulosic waste is a type of waste containing lignin, cellulose and hemicellulose (xylan). In lignocellulose, the compounds that can be utilized are hemicellulose and cellulose, whereas lignin is removed. Hemicellulose and cellulose as polysaccharides can be used as substrates in the production of enzymes and hydrolysis chemically, the process is carried out to obtain simpler sugars. In a previous research, the extraction of xylan from bagasse, a by-product of the extraction, was cellulose. Therefore, this research compared the results of xylan and cellulose extraction in one type of waste and compare the results of the two between 3 types of lignocellulosic waste using the same method. This research aims to extract polysaccharide xylan and cellulose contained in waste bagasse, corn cob and rice straw. The research method used was chemical pretreatment ie delignification with 1% NaOCl (v/v), xylan extraction and cellulose by alkali method using 15% concentrated NaOH and purification of xylan with 4% NaOH (v/v). The target to be achieved is the acquisition of the most polysaccharides will be used as the main ingredient for producing enzymes. The yield of mass balance shows that the highest amount of xylan content is 110 g with the mass decrease from the previous process of 61.5%, while for cellulose rendemen is also obtained by straw as much as 330 g with the decrease of mass from process previously amounted to 39.5%. This shows that the largest amount of xylan content is proportional to the amount of cellulose. The conclusions are reinforced with the results of two other types of waste, which are directly proportional. The highest yield of purification result is bagasse equal to 86 gr with percentage of mass decrease only 14%.Keywords: Lignocellulose, Delignification, Extraction, Xylan, Cellulose.  

scholarly journals Chemical Pretreatment-Independent Saccharifications of Xylan and Cellulose of Rice Straw by Bacterial Weak Lignin-Binding Xylanolytic and Cellulolytic Enzymes

2017 ◽  
Vol 83 (22) ◽  
Author(s):  
Thitiporn Teeravivattanakit ◽  
Sirilak Baramee ◽  
Paripok Phitsuwan ◽  
Somphit Sornyotha ◽  
Rattiya Waeonukul ◽  
...  
Keyword(s):  
Lignocellulosic Biomass ◽  
Rice Straw ◽  
Chemical Pretreatment ◽  
Environment Friendly ◽  
Glucose Yield ◽  
Content Type ◽  
Enzyme Pretreatment ◽  
One Step ◽  
Arabinoxylan Arabinofuranohydrolase ◽  
Xylanolytic Enzyme

ABSTRACT Complete utilization of carbohydrate fractions is one of the prerequisites for obtaining economically favorable lignocellulosic biomass conversion. This study shows that xylan in untreated rice straw was saccharified to xylose in one step without chemical pretreatment, yielding 58.2% of the theoretically maximum value by Paenibacillus curdlanolyticus B-6 PcAxy43A, a weak lignin-binding trifunctional xylanolytic enzyme, endoxylanase/β-xylosidase/arabinoxylan arabinofuranohydrolase. Moreover, xylose yield from untreated rice straw was enhanced to 78.9% by adding endoxylanases PcXyn10C and PcXyn11A from the same bacterium, resulting in improvement of cellulose accessibility to cellulolytic enzyme. After autoclaving the xylanolytic enzyme-treated rice straw, it was subjected to subsequent saccharification by a combination of the Clostridium thermocellum endoglucanase CtCel9R and Thermoanaerobacter brockii β-glucosidase TbCglT, yielding 88.5% of the maximum glucose yield, which was higher than the glucose yield obtained from ammonia-treated rice straw saccharification (59.6%). Moreover, this work presents a new environment-friendly xylanolytic enzyme pretreatment for beneficial hydrolysis of xylan in various agricultural residues, such as rice straw and corn hull. It not only could improve cellulose saccharification but also produced xylose, leading to an improvement of the overall fermentable sugar yields without chemical pretreatment. IMPORTANCE Ongoing research is focused on improving “green” pretreatment technologies in order to reduce energy demands and environmental impact and to develop an economically feasible biorefinery. The present study showed that PcAxy43A, a weak lignin-binding trifunctional xylanolytic enzyme, endoxylanase/β-xylosidase/arabinoxylan arabinofuranohydrolase from P. curdlanolyticus B-6, was capable of conversion of xylan in lignocellulosic biomass such as untreated rice straw to xylose in one step without chemical pretreatment. It demonstrates efficient synergism with endoxylanases PcXyn10C and PcXyn11A to depolymerize xylan in untreated rice straw and enhanced the xylose production and improved cellulose hydrolysis. Therefore, it can be considered an enzymatic pretreatment. Furthermore, the studies here show that glucose yield released from steam- and xylanolytic enzyme-treated rice straw by the combination of CtCel9R and TbCglT was higher than the glucose yield obtained from ammonia-treated rice straw saccharification. This work presents a novel environment-friendly xylanolytic enzyme pretreatment not only as a green pretreatment but also as an economically feasible biorefinery method.

scholarly journals Microwave Assisted Chemical Pretreatment Method for Bio-ethanol Production from Rice Straw

2017 ◽  
Vol 29 (5) ◽  
pp. 943-950 ◽  
Author(s):  
Renu Singh ◽  
Monika Srivastava ◽  
Bharti Rohatgi ◽  
Abhijit Kar ◽  
Ashish Shukla
Keyword(s):  
Ethanol Production ◽  
Rice Straw ◽  
Chemical Pretreatment ◽  
Pretreatment Method ◽  
Microwave Assisted

scholarly journals PENGARUH PENAMBAHAN ABU CANGKANG BEKICOT PADA SEMEN RAMAH LINGKUNGAN TERHADAP KUAT TEKAN MORTAR

2018 ◽  
Vol 8 (2) ◽  
pp. 63-69
Author(s):  
Achendri M. Kurniawan ◽  
Devita Sulistiana
Keyword(s):  
Compressive Strength ◽  
Experimental Method ◽  
Rice Straw ◽  
Research Method ◽  
Environmental Damage ◽  
Fine Aggregate ◽  
Compressive Test ◽  
Snail Shell ◽  
Substitute Material ◽  
Straw Ash

Blitar Regency is one of the strange culinary centers, among which are processed various foods from snail base ingredients, ranging from kripik, sate oseng-oseng and so on as well as the existence of Blitar district is one of the rice barns in East Java. With the existence of Blitar district as a snail-based culinary producer and one of the rice barns in East Java, this is not spared from several problems, such as the disposal of snail shells in the river and burning of rice straw in rice fields which both will cause environmental damage. This study aims to examine the use of snail shell ash and rice straw ash as a substitute material for cement in mortar mixtures against mortar compressive strength. The research method used was the experimental method by mixing fine aggregate main ingredients with snail shell ash and rice straw ash then testing the compressive strength. The results of the compressive test with the addition of the percentage of snail shell shell turned out to increase by 54.78%.

scholarly journals Pembuatan Meringue Pavlova Mengunakan Air Rendaman Kacang Chickpeas Sebagai Pengganti Putih Telur

2018 ◽  
Vol 5 (1) ◽  
pp. 11-21
Author(s):  
Chairul Salim ◽  
Vienna Artina Sembiring ◽  
Yonathan Raditya
Keyword(s):  
Protein Content ◽  
Research Method ◽  
Egg White ◽  
Egg Allergy ◽  
Nutritional Content ◽  
Main Ingredient ◽  
Sponge Cake ◽  
Vegetable Products ◽  
Processed Products ◽  
Fruit Purée

Abstrak Meringue adalah campuran dasar putih telur yang dikocok bersama gula hingga mengembang. Teksturnya yang creamy membuatnya menjadi favorit bagi terciptanya beberapa produk pastry lainnya seperti pavlova, mousse, baked alaska, macaron, souffle, dacquoise dan bahkan sponge cake. Pavlova adalah makanan penutup yang terbuat dari meringue lalu diisi dengan pastry cream dan dihias dengan menggunakan stroberi dan atau kiwi dan markisa pure. Meski menggunakan putih telur, sebenarnya masih ada sekelompok orang yang belum bisa menikmati produk meringue dan olahan yang lezat. Beberapa dari orang-orang yang alergi terhadap telur atau yang mengadopsi gaya hidup vegan. Alergi telur biasanya disebabkan oleh kandungan protein telur yang terkandung dalam albumin. Chickpea memiliki kandungan gizi yang unik dibandingkan dengan kacang polong dan produk nabati lainnya, dalam buncis mengandung protein dengan proporsi lebih tinggi sekitar 17% -30%. Kandungan protein lain yang juga ditemukan pada buncis adalah albumin dan globulin. Dalam penelitian ini metode yang digunakan adalah metode penelitian eksperimental. Dalam penelitian eksperimental ini, perancangan eksperimental yang dilakukan adalah pemanfaatan kacang tanah kacang tanah sebagai pengganti putih telur dalam pembuatan meringue pavlova. Perlakuan yang diberikan hanya satu yaitu 100% pengganti putih telur dengan kacang kacang kacang 100% sebagai bahan utama pembuatan pavlova meringue. Meringue pavlova yang terbuat dari 100% buncis memiliki kualitas yang bersaing dengan meringue pavlova yang terbuat dari 100% putih telur dan bisa diterima dengan baik oleh konsumen. Keywords: Meringue, Chickpeas, Pavlova Abstract Meringue is a basic mixture of egg whites whipped together with sugar until fluffy. Creamy texture makes it a favorite for creation into several other pastry products like pavlova, mousse, baked alaska, macaron, souffle, dacquoise and even sponge cake. Pavlova is a dessert made from meringue then filled with pastry cream and decorated using strawberries and or kiwi and passion fruit purée. Although using egg whites, in fact there are still a group of people who have not been able to enjoy the delicious meringue and processed products. Some of these people who are allergic to eggs or who are adopting a vegan lifestyle. Egg allergy is commonly caused by the protein content of eggs contained in albumin. Chickpeas has a unique nutritional content compared with other legumes and vegetable products, in chickpeas contained protein with a higher proportion of about 17% -30%. Other protein content also found in chickpeas is albumin and globulin. In this research the method used is experimental research method. In this experimental study the experimental design carried out was the utilization of chickpeas peanut water in lieu of egg white in the manufacture of meringue pavlova. The treatment provided is only one that is 100% egg white replacement with 100% water chickpeas peanuts as the main ingredient of making meringue pavlova.Meringue pavlova which made from 100% chickpeas water have a quality that compete with meringue pavlova which made from 100% egg white and can be accepted well by consumer.

scholarly journals Physico-chemical properties and nutrient content of some slow pyrolysis biochars produced from different feedstocks

2017 ◽  
Vol 29 (2) ◽  
pp. 111-122 ◽  
Author(s):  
Mahmudul Islam Piash ◽  
Md Faruque Hossain ◽  
Zakia Parveen
Keyword(s):  
Rice Straw ◽  
Water Hyacinth ◽  
Organic Waste ◽  
Farmyard Manure ◽  
Average Particle Size ◽  
Chemical Properties ◽  
Average Particle ◽  
Organic Carbon Content ◽  
Corn Cob ◽  
Slow Pyrolysis

Six slow pyrolysis biochars viz. farmyard manure (FM), water hyacinth (WH), domestic organic waste (DW), quick compost (QC), corn cob (CC) and rice straw (RS) were analyzed for their physical and chemical properties. Biochar yielding capacity varied from 34 to 51%, depending on the used feedstock. Water hyacinth biochar exhibited the highest water holding capacity (495%), whereas corn cob biochar had the lowest (146%) regardless of its highest pore volume. Brunauer-Emmett-Teller (BET) specific surface area was found maximum among the plant derived biochars except corn cob. Rice straw biochar exhibited the least mean pore diameter while highest in domestic organic waste. All biochars possessed pH values more than 9. CEC of water hyacinth (WH) was highest, while lowest was in quick compost (QC) biochar. Smallest average particle size (0.54 ?m2) was exhibited by water hyacinth biochar. Organic carbon content ranged from 33 to 49%. Nutrient (N, P, K and S) status of biochar produced from domestic organic waste (DW) was found the maximum compared to the rest and corn cob (CC) biochar showed the lowest nutritional value.Bangladesh J. Sci. Res. 29(2): 111-122, December-2016

Bioethanol Production from Rice Straw in the MAFF Research Project, Japan

2009 ◽  
Vol 1219 ◽  
Author(s):  
Ken Tokuyasu
Keyword(s):  
Heat Treatment ◽  
Saccharomyces Cerevisiae ◽  
Rice Straw ◽  
Enzymatic Saccharification ◽  
Bioethanol Production ◽  
Chemical Pretreatment ◽  
Simple Method ◽  
Herbaceous Biomass ◽  
Free Glucose ◽  
Simultaneous Saccharification

AbstractRice straw is among the most abundant herbaceous biomass, and regarded as the central feedstock for bioethanol production in Japan. We found that significant amounts of soft carbohydrates (SCs), defined as carbohydrates readily recoverable by mere extraction from the biomass or brief enzymatic saccharification, exist in rice straw in the form of free glucose, free fructose, sucrose, starch, and β-1,3-1,4-glucan. Based on the finding, we proposed a simple method for bioethanol production from rice straw samples with SCs, by a heat treatment for sterilization and starch gelatinization, followed by simultaneous saccharification/fermentation with Saccharomyces cerevisiae. This method would offer an efficient process for bioethanol production without the aid of harsh thermo/chemical pretreatment step.

Pyrolysis of agricultural biomass residues: Comparative study of corn cob, wheat straw, rice straw and rice husk

2017 ◽  
Vol 237 ◽  
pp. 57-63 ◽  
Author(s):  
Bijoy Biswas ◽  
Nidhi Pandey ◽  
Yashasvi Bisht ◽  
Rawel Singh ◽  
Jitendra Kumar ◽  
...  
Keyword(s):  
Comparative Study ◽  
Wheat Straw ◽  
Rice Straw ◽  
Rice Husk ◽  
Corn Cob ◽  
Agricultural Biomass ◽  
Biomass Residues

scholarly journals Compositional Assessment of Selected Plant-based Substrates for Biogas Production

2021 ◽  
pp. 1-6
Author(s):  
Ugwu Tochukwu Nicholas ◽  
Nwachukwu Augusta Anuli ◽  
Ogbulie Toochukwu Ekwutosi ◽  
Anyalogbu Ernest Anayochukwu
Keyword(s):  
Rice Straw ◽  
Water Hyacinth ◽  
Energy Demand ◽  
Plant Biomass ◽  
Biogas Production ◽  
Primary Source ◽  
Modern World ◽  
Corn Cob ◽  
Biogas Yield ◽  
Corn Cobs

Enormous quantities of plant biomass are generated annually, as agricultural wastes. Lignocellulose is the main structural constituent of plants and represents the primary source of renewable organic matter on earth. This study was carried out to evaluate the lignocellulose composition, proximate and selected physicochemical characteristics of some selected plant-based substrates for biogas production. The substrates were: Corn cobs, Rice straw and Water hyacinth (Eichhorniacrassipes). They were collected, cut, dried for 72 hours at 320C, milled and subjected to hemicellulose, lignin and cellulose compositional analyses, using the standard Sox let extraction method. Standard methods were employed for proximate and physicochemical analyses. Results of the compositional evaluation showed that corn cob has the highest percentages of cellulose (42.0%), while extractives content was least (2.18%) in Rice straw. For the proximate analysis, the percentage carbohydrates (24.22) and ash (24.40) were highest in rice straw, while fat content  had the least values of 0.65%  recorded in corn cobs. The results of the physicochemical analysis showed that Rice straw had the highest values of TS (94.55%) and phosphorus (928.57mg/kg), Corn cob had the highest TVS (85.53%) and organic carbon (50.46%) while Water hyacinth recorded the highest Nitrogen content (2.33%). They are good substrates for energy generation, and lignocellulosic biomass holds a huge potential to meet the current energy demand of the modern world. The knowledge of the lignocellulosic composition of the biomass would help in choosing appropriate pretreatment measures to achieve better hydrolysis which would translate to higher biogas yield.

scholarly journals Preparation of regenerated cellulose from rice straw lignocellulosic waste and its use for reinforced paper products

TAPPI Journal ◽  
2021 ◽  
Vol 20 (7) ◽  
pp. 439-451
Author(s):  
IZHAR ALAM ◽  
JITENDRA KUMAR ◽  
CHHAYA SHARMA
Keyword(s):  
Rice Straw ◽  
Fiber Length ◽  
Water Solution ◽  
Crystallinity Index ◽  
Degree Of Polymerization ◽  
Element Content ◽  
Hydroxyl Group ◽  
Regenerated Cellulose ◽  
Lignocellulosic Waste ◽  
Thawing Process

Rice straw waste is a lignocellulosic waste produced by farmers in large quantities. In this study, regenerated cellulose (RC) from rice straw was prepared by dissolving rice straw holocellulose (HC) in NaOH/Urea/Thiourea/Water solution by the freeze-thawing process. The crystallinity index of RC was calculated at 31%, which is out of the crystallinity range of 39%–69% that has been previously suggested. The study indicated that the RC is amorphous with a low degree of polymerization (638) and higher hydroxyl group content as compared to HC. The fiber length of RC was found to be 26.7% shorter; however, the width of RC was 21.2% higher as compared to HC. Reduced kinked fiber content was observed in the fraction of RC (18.3%) as compared with HC (39.1%), and a higher curl index of fiber was observed more so in HC (10.5%) than RC (5.6%). Because of the regeneration process, the fiber length was reduced and a fines element content of about 96% was observed in RC compared to the initial fines content of HC (56.9%). Irrespective of the high fines element content of RC, the composite paper of rice straw bleached pulp and RC fibers was developed with an increase in the tensile index from 41.4 N.m/g to 71.2 N.m/g and an increase in the burst index from 4.7 kPa.m2/g to 5.3 kPa.m2/g with the addition of 5% and 15% RC, respectively. However, enhanced tear index of paper was observed up to 5% and then it declined upon further addition of RC. The study revealed that regenerated cellulose can be used as a strength additive to overcome the shortcomings of low mechanical properties in paper products.

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