scholarly journals Influence of Temperature on Selected Life-History Traits of Black Soldier Fly (Hermetia illucens) Reared on Two Common Urban Organic Waste Streams in Kenya

Animals ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 79 ◽  
Author(s):  
Marwa Shumo ◽  
Fathiya Khamis ◽  
Chrysantus Tanga ◽  
Komi Fiaboe ◽  
Sevgan Subramanian ◽  
...  
Keyword(s):  
Larval Development ◽  
Large Scale ◽  
Sub Saharan Africa ◽  
Effect Of Temperature ◽  
Cow Dung ◽  
Scale Production ◽  
Organic Substrates ◽  
Waste Streams ◽  
Black Soldier Fly ◽  
Livestock Feed

In sub-Saharan Africa, urban populations are projected to increase by 115% in the coming 15 years. In addition, economic growth and dietary shifts towards animal source foods have put high pressure and demand on agricultural production. The high ecological footprint of meat and dairy production, as well as high feed costs, prevent the livestock sector from meeting the increasing demand in a sustainable manner. Insects such as the black soldier fly (BSF) have been identified as potential alternatives to the conventionally used protein sources in livestock feed due to their rich nutrient content and the fact that they can be reared on organic side streams. Substrates derived from organic byproducts are suitable for industrial large-scale production of insect meal. Although efficient in waste management and in feed production, BSF larvae are very sensitive to the external environment such as temperature and rearing medium. Therefore, we studied the effect of temperature and substrate type, i.e., brewers’ spent grain (SG) and cow dung (CD), on the development and survival of BSF larvae. Both organic substrates were readily available in Nairobi, Kenya, the location of the experiments. In our experiment, 100 3–5-day-old BSF larvae were placed into containers that contained either SG or CD and further treated at temperatures of 15 °C, 20 °C, 25 °C, 30 °C, and 35 °C. The duration of larval development was recorded, and the prepupae were removed, weighed, and placed individually in separate, labeled, 35-mL plastic cups filled with moist sawdust. After emergence, 10 2-day-old adults (5 males and 5 females) from every replica per substrate were transferred into a cage (40 × 40 × 40 cm) and allowed to mate for 24 h at their respective temperatures. The laid egg batches were collected and counted, and the adult flies’ longevity was recorded. The data were subjected to a two-way analysis of variance (ANOVA) using the general linear model procedure. BSF larvae reared on SG developed faster than those reared on CD; the former also favored higher temperatures for their larval development and emergence into adults. The optimum range was 25–30 °C. With increasing temperatures, the longevity of adult BSF decreased, while the fecundity of females increased. Thus, it is possible to take advantage of the readily available SG waste streams in the urban environments of Kenya to produce BSF larvae-derived livestock feed within a short duration of time and at relatively high temperatures.

scholarly journals Nano Drug Deliverer for Ampicillin, Clavulanic Acid, Imipenem, Penicillin G and Ticarcillin

2016 ◽  
Vol 13 (10) ◽  
pp. 7144-7155
Author(s):  
Maryam Derakhshandeh ◽  
Majid Monajjemi
Keyword(s):  
Drug Delivery ◽  
Clavulanic Acid ◽  
Large Scale ◽  
Penicillin G ◽  
Effect Of Temperature ◽  
Phenoxyacetic Acid ◽  
Scale Production ◽  
Electronic Effects ◽  
Beta Lactam ◽  
Gram Positive

Ampicillin, Clavulanic acid, Imipenem, Penicillin G and Ticarcillin properties for the drug delivery with binding to SWCNNTs and SWBNNTs have been studied. Penicillin and its alteration Penicillin G or phenoxyacetic acid for Penicillin V is used for large scale production. Penicillin and other cell wall inhibitors are primarily specific against Gram positive bacteria because of higher percentage of peptidoglycan in the cell walls of these organisms. Ampicillin belonging to the penicillin group of beta lactam antibiotics, ampicillin is able to penetrate Gram positive and some Gram-negative bacteria. Imipenem (Primaxin) is an intravenous β-lactam antibiotic discovered by Merck scientists Burton Christensen, William Leanza, and Kenneth Wildonger in 1980. It was the first member of the carbapenem class of antibiotics. Based on our previous works we have modeled and simulated a drug delivery system of those antibiotics. The investigation of those antibiotics in binding with single-walled carbon nanotube (SWCNT) and SWBNNTs have been studied by theoretical methods. It has been established the best structural and functional of those antibiotics. A number of computational chemistry studies carried out to understand the conformational preferences that may be attributed to stereo electronic effects. These results show the minimized structure of mentioned antibiotics with SWCNTs and SWBNNTs, calculated potential energy for important dihedral angles, and the effect of temperature on geometry of optimized structure. NMR by GIAO approximation, have been applied for determination of the situation in antibiotics-SWCNT and shifting. This model provides an atomistic analysis of the antibiotics-SWCNT strategy and its implications for further investigations of drugs.

An optimal feeding strategy for black soldier fly larvae biomass production and faecal sludge reduction

2019 ◽  
Vol 5 (3) ◽  
pp. 201-213 ◽  
Author(s):  
E.M. Nyakeri ◽  
M.A. Ayieko ◽  
F.A. Amimo ◽  
H. Salum ◽  
H.J.O. Ogola
Keyword(s):  
Larval Development ◽  
Biomass Production ◽  
Development Time ◽  
Organic Waste ◽  
Feeding Strategy ◽  
Organic Substrates ◽  
Black Soldier Fly ◽  
Organic Fertiliser ◽  
Wide Range ◽  
Faecal Sludge

The dual roles of efficient degradation and bioconversion of a wide range of organic wastes into valuable animal protein and organic fertiliser, has led to increased interest in black soldier fly (BSF) technology as a highly promising tool for sustainable waste management and alternative protein production. The current study investigated the potential application of BSF technology in the valorisation of faecal sludge (FS), a common organic waste in the urban informal settlements in low and middle-income countries. We evaluated the effect of different feeding rates (100, 150, 200 and 250 mg/larva/day), different feeding regimen and supplementation with other waste feedstock (food remains, FR; brewers waste, BW; and banana peelings, BP) on BSF larvae (BSFL) growth rates/yield and FS reduction efficiency. Results showed significantly (P<0.01) higher prepupal yield (179±3.3 and 190±1.2 g) and shorter larval development time (16.7 and 15 days) when reared on 200 and 250 mg/larva/day FS, respectively. However, different feeding regimes of FS did not significantly affect larval growth rate and prepupal yield (P=0.56). Supplementation of FS with other organic substrates resulted in significantly increased BSFL biomass production and substrate reduction, and shortened larval development time; with the effect was more pronounced when FS was supplemented with FR and at 30% supplementation. Protein:fat ratios for BSFL reared on FS, FS:FR, FS:BW were significantly (P<0.05) higher (2.51, 2.53, and 2.44, respectively) compared to FS:BP mixture (1.99). These results demonstrated that supplementation of FS with locally available organic waste can be used to improve its suitability as feedstock for BSF production and organic waste bioremediation from the environment. In conclusion, a daily feeding strategy of substrate containing FS supplemented with 30% organic waste co-substrate at feeding rate of 200 mg/larva/day can be used as a guideline for BSFL mass production and bioremediation of FS both at small- and large-scale level.

scholarly journals Kageneckia oblonga Leaves Subjected to Different Drying Methods: Drying Kinetics, Energy Consumption and Interesting Compounds

2021 ◽  
Vol 5 ◽  
Author(s):  
Carlos Zambra ◽  
Diógenes Hernández ◽  
Hugo Reyes ◽  
Nicole Riveros ◽  
Roberto Lemus-Mondaca
Keyword(s):  
Energy Consumption ◽  
Large Scale ◽  
Moisture Diffusivity ◽  
Convective Drying ◽  
Effect Of Temperature ◽  
Drying Methods ◽  
Scale Production ◽  
Large Scale Production ◽  
Drying Curves ◽  
Drying Conditions

In this study, Kageneckia oblonga leaves were dried under different drying conditions and techniques [oven drying (NC), vacuum drying (VNC), convective drying (FC), and microwave-assisted convective drying (MWFC)]. Thus, the effect of temperature, vacuum, and microwave on the drying features of K. oblonga leaves was determined. Fick's second law was used to calculate the effective moisture diffusivity that varied from 3.94 to 8.14 × 10−11 m2/s, 1.12 to 1.40 × 10−11 m2/s, 7.83 to 11.36 × 10−11 m2/s, and 6.93 to 16.72 × 10−11 m2/s for NC, VNC, FC, and MWFC methods, respectively. In addition, the Weibull and Midilli–Kucuk models accurately predicted all experimental drying curves of K. oblonga leaves. Regarding the energy consumption and efficiency values for different drying methods of K. oblonga were found to be in the range of 0.20–7.50 kW·h and 0.10–3.70%, respectively. The results showed that MWFC method does not significantly affect the phenolic compounds and could be used for large-scale production of K. oblonga dried leaves.

scholarly journals Chemical food safety of using former foodstuffs for rearing black soldier fly larvae (Hermetia illucens) for feed and food use

2020 ◽  
Vol 6 (5) ◽  
pp. 475-488
Author(s):  
H.J. van der Fels-Klerx ◽  
N. Meijer ◽  
M.M. Nijkamp ◽  
E. Schmitt ◽  
J.J.A. van Loon
Keyword(s):  
Large Scale ◽  
Accumulation Rate ◽  
Food Products ◽  
Future Research ◽  
Packaging Materials ◽  
Scale Production ◽  
Black Soldier Fly ◽  
Hermetia Illucens ◽  
Chemical Contaminants ◽  
Mineral Oils

Black soldier fly (BSF, Hermetia illucens) larvae is considered one of the insect species with great potential for large-scale production as feed and food. For this to become economically feasible and to contribute to a circular economy, BSF larvae should be reared on substrates with little or no alternative use for feed and food production. One such class of alternative substrate sources consists of former food products. However, BSF larvae may accumulate chemical contaminants from the substrate, which may originate from the foodstuff and/or the packaging materials. This study aimed to investigate the possible presence of chemical contaminants in BSF larvae being reared on former foodstuff substrates at both laboratory and industrial scale. Four experimental treatments were set up: with meat or vegetarian, and containing between 3-6% of either plastic or paperboard carton packaging material. Four-day old BSF larvae were reared for seven days on these substrates. Concentrations of heavy metals, mineral oil hydrocarbons, dioxins and PCBs, and polycyclic aromatic hydrocarbons were determined in the substrate, residual material, and the larvae. Results suggest that BSF larvae can be reared on former food products containing traces of packaging materials, without negative effects on their growth or survival. Bio-accumulation was observed for most of the tested contaminants, in particular for mineral oils and cadmium, which had a bio-accumulation rate of, respectively, about five and 20. However, none of the concentrations of the analysed contaminants in the substrate and the larvae exceeded the respective legal limits in the EU. Results of this pilot study were promising. As a next step, more different former food products should be investigated in future research.

The carbon to nitrogen ratio in isoenergetic wheat based diets controls the growth rate of the aquatic worm Lumbriculus variegatus

2016 ◽  
Vol 2 (4) ◽  
pp. 225-231
Author(s):  
B. Laarhoven ◽  
H.J.H. Elissen ◽  
C.J.N. Buisman ◽  
H. Temmink
Keyword(s):  
Large Scale ◽  
Control Diet ◽  
C:N Ratio ◽  
Oxygen Demand ◽  
Scale Production ◽  
Organic Substrates ◽  
Lumbriculus Variegatus ◽  
Fish Food ◽  
By Products ◽  
Growth And Reproduction

The aquatic worm Lumbriculus variegatus (Lv) contains high levels of proteins and can provide an excellent fish food. Large-scale production of Lv on low value organic substrates, such as by-products produced during wheat processing, therefore can be a promising and sustainable concept for the aquaculture industry. Growth and reproduction of Lv on different combinations of wheat based derivatives was studied at fixed isoenergetic levels (expressed by the chemical oxygen demand of the food), but at different carbon to nitrogen (C:N) mass ratios under controlled conditions in specifically designed test-beaker tests. Growth and reproduction rates were compared to those on Tetramin®, a substrate known to give excellent growth of Lv. Although Lv did exhibit a growth response on single as well as on mixed wheat fractions, growth was mainly controlled by the C:N ratio of the diets. Lower C:N ratios of typically 6-7 gave a much better performance than high C:N ratios of approximately 20. It was discussed this is probably caused by Lv relying on the presence of proteins for their carbon and energy source. Although growth and reproduction rates were not as high as on the control diet, the results are promising for the development of a worm biomass production system operating on by-products from the wheat processing industry.

scholarly journals Adult Reproductive Tract Morphology and Spermatogenesis in the Black Soldier Fly (Diptera: Stratiomyidae)

2019 ◽  
Vol 112 (6) ◽  
pp. 576-586 ◽  
Author(s):  
Aline S Malawey ◽  
David Mercati ◽  
Charles C Love ◽  
Jeffery K Tomberlin
Keyword(s):  
Electron Microscope ◽  
Large Scale ◽  
Reproductive Tract ◽  
Mass Rearing ◽  
Poultry Feed ◽  
Scale Production ◽  
Male Reproductive Tract ◽  
Black Soldier Fly ◽  
Global Industry ◽  
Current Mass

Abstract Large-scale production of the black soldier fly [Hermetia illucens (L.) (Diptera: Stratiomyidae)] for use as aquaculture and poultry feed has developed into a global industry. Successful commercialization of the black soldier fly relies on optimizing the production of fecund adults. However, current mass-rearing protocols result in variable production of fertile eggs. To help lay a foundation for a better understanding of factors that may play a role in this variability, the morphology of the black soldier fly male reproductive tract and spermatozoa, associated spermatogenesis process, impact of age on the process, and the female spermatheca morphology were examined with various microscopic techniques (e.g., scanning electron microscope, transition electron microscope, and dissecting scope). The gross morphology of the male reproductive tract and female spermatheca appear to be similar to those found in other brachyceran flies. Male spermatozoa are long (~860 µm overall, ~8 µm head), apparently motile, and possess flagella with a typical 9 + 9 + 2 axoneme triplets. Germ cells go through incomplete mitotic divisions surrounded by somatic cyst cells in the testes. Spermatogenesis appears to be initiated during immature development (cryptocephalic pupa stage). From <24 h to 7 d post-emergence, male aging appeared to impact sperm production.

AGRICULTURAL PRODUCTION OF CA DONG PEOPLE IN RESETTLEMENT AREA OF TRANH RIVER HYDROPOWER NUMBER 2: CURRENT SITUATION AND IMPACT FACTORS

2020 ◽  
Vol 9 (2) ◽  
Author(s):  
Bùi Thị Bích Lan
Keyword(s):  
Social Relations ◽  
Agricultural Production ◽  
Large Scale ◽  
Transition Process ◽  
Impact Factors ◽  
Small Scale ◽  
Scale Production ◽  
Technical Application ◽  
Production Models ◽  
Role Of The State

In Vietnam, the construction of hydropower projects has contributed significantly in the cause of industrialization and modernization of the country. The place where hydropower projects are built is mostly inhabited by ethnic minorities - communities that rely primarily on land, a very important source of livelihood security. In the context of the lack of common productive land in resettlement areas, the orientation for agricultural production is to promote indigenous knowledge combined with increasing scientific and technical application; shifting from small-scale production practices to large-scale commodity production. However, the research results of this article show that many obstacles in the transition process are being posed such as limitations on natural resources, traditional production thinking or the suitability and effectiveness of scientific - technical application models. When agricultural production does not ensure food security, a number of implications for people’s lives are increasingly evident, such as poverty, preserving cultural identity, social relations and resource protection. Since then, it has set the role of the State in researching and building appropriate agricultural production models to exploit local strengths and ensure sustainability.

I. S. A. Baud. Forms of Production and Women's Labour: Gender Aspects of Industrialisation in India and Mexico. New Delhi: Sage Publications. 1992. 321 pp.Hardbound. Price: Indian Rs 295.00.

1993 ◽  
Vol 32 (1) ◽  
pp. 129-131
Author(s):  
Naureen Talha
Keyword(s):  
Large Scale ◽  
Indian Society ◽  
New Delhi ◽  
Scale Production ◽  
Female Labour ◽  
Self Employment ◽  
Commodity Production ◽  
Large Scale Production ◽  
Mexican Society ◽  
Small Production

The literature on female labour in Third World countries has become quite extensive. India, being comparatively more advanced industrially, and in view of its size and population, presents a pictures of multiplicity of problems which face the female labour market. However, the author has also included Mexico in this analytical study. It is interesting to see the characteristics of developing industrialisation in two different societies: the Indian society, which is conservative, and the Mexican society, which is progressive. In the first chapter of the book, the author explains that he is not concerned with the process of industrialisation and female labour employed at different levels of work, but that he is interested in forms of production and women's employment in large-scale production, petty commodity production, marginal small production, and self-employment in the informal sector. It is only by analysis of these forms that the picture of females having a lower status is understood in its social and political setting.

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