scholarly journals The Cultivation of Lipid-Rich Microalgae Biomass as Anaerobic Digestate Valorization Technology—A Pilot-Scale Study

Processes ◽  
2020 ◽  
Vol 8 (5) ◽  
pp. 517 ◽  
Author(s):  
Marcin Dębowski ◽  
Marcin Zieliński ◽  
Marta Kisielewska ◽  
Joanna Kazimierowicz ◽  
Magda Dudek ◽  
...  
Keyword(s):  
Culture Medium ◽  
Biomass Concentration ◽  
Pilot Scale ◽  
Dairy Wastewater ◽  
Small Scale ◽  
Treatment Efficiency ◽  
Average Growth Rate ◽  
Average Growth ◽  
Bio Oil ◽  
Microalgae Biomass

The aim of the study was to determine the use of digestate from anaerobic digestion of dairy wastewater as a culture medium for microalgae to obtain bio-oil. The experiments were conducted at a small scale in a closed raceway pond. The efficiency of the microalgae biomass production, the digestate treatment efficiency as well as the content and properties of the bio-oil obtained from the microalgal cells were analyzed. The produced biomass concentration was about 3000 ± 10.5 mg dry biomass/L, with an average growth rate of 160 ± 6.6 mgdm/L·d. The efficiency of organic compound and nutrient removal was above 90%. The bio-oil content in the biomass was about 20%. Based on the results of the study, a concept for technical-scale technology was developed.

Optimization of Culture Media and ITS Identification of Tricholoma matsutake

2013 ◽  
Vol 634-638 ◽  
pp. 1574-1580
Author(s):  
Ji Zhong Wang ◽  
Zhong Hai Jiang ◽  
Shang Yong Zheng
Keyword(s):  
Growth Rate ◽  
Culture Medium ◽  
Culture Media ◽  
Fruit Body ◽  
Tricholoma Matsutake ◽  
Its Sequence ◽  
Average Growth Rate ◽  
Average Growth ◽  
Rdna Its ◽  
Rdna Its Sequences

Aims: To optimize the culture media of 0288 Tricholoma matsutake and to identify it according to its rDNA ITS sequence. Methods: Fruit body, collected from Heilongjiang province, is used as the material, and the mycelium is isolated and radiated under ultraviolet. Then the radiated mycelium is cultured in five different media and its morphology of fungus colony and growth rate are investigated. After that, the rDNA ITS sequences of 0288 and the natural fruit body of T. matsutake are analyzed and identified by PCR and sequencing. Results: The radiated mycelium grew faster in formula A culture medium than others and its average growth rate is up to 0.575mm/d. Results also showed that the homology of the rDNA ITS sequence is almost up to 99% between 0288 and the natural fruit body. Through this experiment, the best growth condition of 0288 is obtained and its fruit body is induced as pure cultural product. It would lay strong foundation for the artificial domestication of the wild T. matsutake.

scholarly journals Effects of Liquid Digestate Treatment on Sustainable Microalgae Biomass Production

2021 ◽  
Author(s):  
Marta Kisielewska ◽  
Marcin Dębowski ◽  
Marcin Zieliński ◽  
Joanna Kazimierowicz ◽  
Piera Quattrocelli ◽  
...  
Keyword(s):  
Growth Medium ◽  
Biomass Production ◽  
Culture Medium ◽  
Culture Media ◽  
Biomass Concentration ◽  
Arthrospira Platensis ◽  
Microalgal Biomass ◽  
Liquid Digestate ◽  
Microalgae Biomass ◽  
High Treatment

AbstractThe aim of the study was to investigate the potential of microalgal cultivation on anaerobic liquid digestate as a growth medium. The two methods of liquid digestate treatment including centrifugation and distillation and the two algal strains (Chlorella vulgaris and Arthrospira platensis) were compared. Additionally, the volume of the liquid digestate used to prepare the culture medium constituted from 10 to 50% of the medium volume. The study demonstrated that the highest C. vulgaris and A. platensis biomass productions of 2490 mg TS/L and 2990 mg/L, respectively, were obtained by adding 50% of distilled digestate to a growth medium. Regarding centrifuged liquid digestate, only 10% dilution was required to obtain the maximum final biomass concentration. A. platensis removed 81.1% and 66.4% of the total nitrogen from medium prepared on distilled and centrifuged digestate, respectively, while C. vulgaris ensured 64.1% and 47.1% of removal, respectively. The phosphorus removal from both culture media was higher than 94.2% with A. platensis, while it was 70.4% from distilled and 87.4% from centrifuged media with C. vulgaris. The study confirmed a great potential of microalgal biomass production on anaerobic liquid digestate with a high treatment efficiency of digestate.

RANCANG BANGUN PERANGKAT EKSPERIMENTASI PROSES PIROLISIS BIOMASA GELOMBANG MIKRO

2013 ◽  
Vol 14 (2) ◽  
Author(s):  
Noor Fachrizal
Keyword(s):  
Large Scale ◽  
Continuous Model ◽  
Biomass Energy ◽  
Scale Model ◽  
Small Scale ◽  
Laboratory Apparatus ◽  
Liquid Form ◽  
Large Scale Model ◽  
Bio Oil ◽  
Pyrolysis Of Biomass

Biomass such as agriculture waste and urban waste are enormous potency as energy resources instead of enviromental problem. organic waste can be converted into energy in the form of liquid fuel, solid, and syngas by using of pyrolysis technique. Pyrolysis process can yield higher liquid form when the process can be drifted into fast and flash response. It can be solved by using microwave heating method. This research is started from developing an experimentation laboratory apparatus of microwave-assisted pyrolysis of biomass energy conversion system, and conducting preliminary experiments for gaining the proof that this method can be established for driving the process properly and safely. Modifying commercial oven into laboratory apparatus has been done, it works safely, and initial experiments have been carried out, process yields bio-oil and charcoal shortly, several parameters are achieved. Some further experiments are still needed for more detail parameters. Theresults may be used to design small-scale continuous model of productionsystem, which then can be developed into large-scale model that applicable for comercial use.

Transplantation of coral fragment, Acropora formosa (Scleractinia)

2014 ◽  
pp. 1
Author(s):  
Hanny Tioho ◽  
Maykel A.J Karauwan
Keyword(s):  
Fragment Size ◽  
Observation Time ◽  
Minimum Size ◽  
Average Growth Rate ◽  
Average Growth ◽  
Significant Difference ◽  
Acropora Formosa ◽  
Survival And Growth ◽  
One Way Anova ◽  
Better Than

The minimum size of coral transplants, Acropora formosa, was assessed to support their survival and growth. For this, 150 coral fragments of different sizes (5, 10, 15 cm) were transplanted close to the donor colony. Their survivorship and growth were observed for 12 months. At the end of the observation time, 90% of 15 cm-transplanted coral fragments survived, while the others (10cm and 5 cm) did 86% and 82% respectively. The average growth rate of 5 cm-coral fragments was 0.860 cm/month, while 10 and 15 cm-fragments were 0.984 cm/month and 1.108 cm/month respectively. One-way ANOVA showed that there was significant difference (p<0.05) among the three (5, 10, 15 cm) transplant initial sizes in which the longest fragment size tended to survive longer than the smaller one.  However, the smaller transplants grew better than the bigger one, 10.318 cm/year (206%) for 5 cm-transplant, 11.803 cm/year (118%) for 10 cm-transplant, and 13.299 cm/year (89%) for 15 cm-transplant, respectively. Ukuran minimal fragmen karang Acropora formosa yang ditransplantasi diduga untuk mendukung ketahanan hidup dan pertumbuhannya. Untuk itu, 150 fragmen karang ditransplantasi ke lokasi yang berdekatan dengan koloni induknya.  Ketahanan hidup dan pertumbuhan semua fragmen karang yang ditransplantasi diamati selama 12 bulan.  Pada akhir pengamatan, 90% dari fragmen karang berukuran 15 cm yang ditransplantasi dapat bertahan hidup, sedangkan yang lainnya (ukuran 10 cm dan 5 cm) masing-masing sebesar 86% dan 82%.  Rata-rata laju pertumbuhan fragmen karang dengan ukuran awal 5 cm adalah 0,860 cm/bulan, sedangkan ukuran fragmen 10 dan 15 cm masing-masing adalah 0,984 cm/bulan and 1,108 cm/bulan. ANOVA satu arah menunjukkan adanya perbedaan yang nyata (p<0.05) antara ketiga ukuran fragmen yang berbeda, di mana ukuran fragmen karang yang lebih panjang cenderung mempunyai ketahanan hidup yang lebih baik. Namun demikian, ukuran transplant yang lebih kecil memiliki pertumbuhan lebih baik dibandingkan dengan ukuran yang lebih besar, yakni10,318 cm/tahun (206%) untuk transplant berukuran 5 cm, 11,803 cm/tahun (118%) untuk 10 cm, dan 13,299 cm/tahun (89%) untuk ukuran 15 cm.

scholarly journals Growth of Haematococcus pluvialis on a Small-Scale Angled Porous Substrate Photobioreactor for Green Stage Biomass

2021 ◽  
Vol 11 (4) ◽  
pp. 1788
Author(s):  
Thanh-Tri Do ◽  
Binh-Nguyen Ong ◽  
Tuan-Loc Le ◽  
Thanh-Cong Nguyen ◽  
Bich-Huy Tran-Thi ◽  
...  
Keyword(s):  
Light Intensity ◽  
Algal Biomass ◽  
Haematococcus Pluvialis ◽  
Biomass Productivity ◽  
Pilot Scale ◽  
Small Scale ◽  
Porous Substrate ◽  
Low Light ◽  
Green Algal ◽  
Green Stage

In the production of astaxanthin from Haematococcus pluvialis, the process of growing algal biomass in the vegetative green stage is an indispensable step in both suspended and immobilized cultivations. The green algal biomass is usually cultured in a suspension under a low light intensity. However, for astaxanthin accumulation, the microalgae need to be centrifuged and transferred to a new medium or culture system, a significant difficulty when upscaling astaxanthin production. In this research, a small-scale angled twin-layer porous substrate photobioreactor (TL-PSBR) was used to cultivate green stage biomass of H. pluvialis. Under low light intensities of 20–80 µmol photons m−2·s−1, algae in the biofilm consisted exclusively of non-motile vegetative cells (green palmella cells) after ten days of culturing. The optimal initial biomass density was 6.5 g·m−2, and the dry biomass productivity at a light intensity of 80 µmol photons m−2·s−1 was 6.5 g·m−2·d−1. The green stage biomass of H. pluvialis created in this small-scale angled TL-PSBR can be easily harvested and directly used as the source of material for the inoculation of a pilot-scale TL-PSBR for the production of astaxanthin.

Survival and growth of understory trees in oak forests of the Hudson Highlands, New York

1981 ◽  
Vol 11 (3) ◽  
pp. 689-695 ◽  
Author(s):  
Craig G. Lorimer
Keyword(s):  
New York ◽  
Growth Rates ◽  
Red Oak ◽  
Northern Red Oak ◽  
Average Growth Rate ◽  
Average Growth ◽  
Red Oaks ◽  
Oak Trees ◽  
Survival And Growth ◽  
Understory Trees

Mortality and growth rates of trees in various crown classes and size classes were analyzed from 40-year permanent plot records of slope and ravine forest dominated by chestnut oak (Quercusprinus L.) and northern red oak (Quercusrubra L.). Average 5-year mortality rates for suppressed trees ≥2.5 cm dbh of chestnut oak and red oak in the slope forest were 26 and 45%, respectively. None of the suppressed red oaks survived the 40-year period, compared with 14% of the chestnut oaks and 33% of the red maples (Acerrubrum L.). Mortality of oak trees in the intermediate crown class was less than half that of suppressed trees, but still much higher than that of maples and birches on the tracts. Survival was reasonably high for oaks as long as the top of the crown was receiving direct sunlight, but the expected 40-year survival rate of red oaks in such a position is only 20%, with an average growth rate of 1.0 mm in diameter per year. Curves and equations expressing average mortality and growth rates at various levels of competition are presented for each species.

scholarly journals POTENSI EKSTRAK DAUN KARUK (Piper sarmentosum) SEBAGAI INSEKTISIDA NABATI HAMA ULAT GRAYAK (Spodoptera litura)

EKOLOGIA ◽  
2020 ◽  
Vol 18 (2) ◽  
pp. 55-62
Author(s):  
Rangga Eka S. P ◽  
Moerfiah . ◽  
Triastinurmiatiningsih .
Keyword(s):  
Spodoptera Litura ◽  
Larval Growth ◽  
Mortality Rates ◽  
Average Growth Rate ◽  
Average Growth ◽  
Extract Concentration ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Four Levels ◽  
Extent Of Damage

The purpose of this study was to determine the activity of the leaf extract of Piper sarmentosum on mortality and damage levels by pest armyworm (Spodoptera litura). This research was conducted at the Laboratory of Biology, Faculty of Mathematics and Natural Sciences, Pakuan University, Bogor. This study uses a completely randomized design (CRD), with four levels of extract concentration, that is 0% as control, 30%, 40% and 50%.  Each treatment was repeated four times. The variables measured were mortality rates, the extent of damage the leaves, and larval growth. A concentration of EDK 50% showed activity in killing the armyworm by 38%. The lowest level of damage is 5%, with an average growth rate to its lowest larvae by 0.8 cm with the provision of treatment EDK 50%, and the higest level of damage is 75% by a concetration of EDK 30% treatments.

scholarly journals PERFORMANCE EVOLUTION OF JAMMU AND KASHMIR STATE FINANCIAL CORPORATION

2021 ◽  
Vol 9 (08) ◽  
pp. 647-650
Author(s):  
Maryama Gul ◽  
◽  
P.K. Sanse ◽  
Keyword(s):  
Growth Rate ◽  
Trend Analysis ◽  
Ratio Analysis ◽  
Average Growth Rate ◽  
Jammu And Kashmir ◽  
Average Growth ◽  
Research Period ◽  
Study Performance

The objective of this study was to assess the performance of JK SFC. The establishment of State financial Corporations was, one of the steps taken, at the official level to promote the growth of small and mediumscale industries. The Jammu and Kashmir State Financial Corporation is a statutory Corporation established under SFCs Act 1951(Central Act 63 of 1951) which is facing heavy losses due to no source of funds and no recovery of loans. In the present study performance of JKSFC was analyzed with different tools like trend analysis and ratio analysis and average growth rate. The results of the study show that performance of JKSFC is declining during the research period due tofacing problems of liquidity & solvency.

scholarly journals KAJIAN PERAN RISET DAN PENGEMBANGAN DALAM MENDUKUNG INDUSTRI KAKAO NASIONAL = STUDY ON THE ROLE OF RESEARCH AND DEVELOPMENT IN SUPPORTING INDONESIAN COCOA INDUSTRY

2016 ◽  
Vol 10 (1) ◽  
pp. 19-26
Author(s):  
Lamhot P. Manalu
Keyword(s):  
Research And Development ◽  
Foreign Exchange ◽  
Oil Palm ◽  
Small Scale ◽  
Processing Industry ◽  
Average Growth ◽  
Medium Scale ◽  
Intermediate Products ◽  
Quality Policy

Cocoa is commodities third largest foreign exchange earner after oil palm and rubber. In 2012 production totaled 833 310 tonnes of cocoa with an average growth of 1.56%. There are two major challenges in the development of the national cocoa industry, the increase in quantity (production and productivity) and quality. To support these efforts the role of research and development is needed to ensure that the procedures adopted are appropriate and fit. This study aims to study the role of research and development and other supporting factors in addressing the problems of the national cocoa. The study is in the form of survey respondents which are R&D institutes, universities and cocoa processing industry. The results show that there is a problem of national cocoa industry in all aspects, here the cultivation aspect is the biggest problem. The next aspects are mentoring, institutional, business scale, quality, policy, processing of intermediate products and processing of downstream products. The study also shows that there is still a lot of research results that can not be utilized by the cocoa industry, the rest has to be applied even if but only for a small scale so that the less significant. In the small and medium scale of cocoa enterprises, the equipment used is generally low capacity so inefficient. ABSTRAKKakao merupakan komoditas perkebunan penghasil devisa terbesar ketiga setelah kelapa sawit dan karet. Pada tahun 2012 produksi kakao tercatat sebesar 833.310 ton dengan rata-rata pertumbuhan sebesar 1,56%. Ada dua tantangan utama dalam pengembangan industri kakao nasional yaitu peningkatan kuantitas (produksi dan produktifitas) dan kualitas. Untuk mendukung usaha tersebut peran riset dan pengembangan (risetbang) sangat dibutuhkan untuk memastikan prosedur yang diterapkan sudah tepat dan sesuai.Studi ini bertujuan untuk mempelajari peran risetbang serta faktor pendukung lainnya dalam menjawab permasalahan kakao nasional. Studi ini berupa hasil survey terhadap responden (pelaku risetbang kakao) yaitu lembaga penelitian dan pengembangan, universitas serta industri pengolahan kakao. Hasil kajian menunjukkan bahwa permasalahan industri kakao nasional terdapat pada semua aspek, dimana aspek budidaya merupakan permasalahan terbesar. Aspek berikutnya adalah penyuluhan, kelembagaan, skala usaha, mutu, kebijakan, pengolahan produk antara dan pengolahan produk hilir. Studi juga menunjukkan bahwa masih banyak hasil riset yang tidak dapat dimanfaatkan oleh industri kakao skala besar, sisanya walaupun telah bersifat aplikatif tetapi hanya untuk skala kecil sehingga kurang signifikan. Pada industri usaha skala kecil dan menengah umumnya peralatan yang digunakan berkapasitas rendah sehingga tidak efisien.

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