Production-Scale Methods for Intensive Culture of Walleye Fry

The removal of slag from melt surface of hot metal and steel ladles is a necessary condition to provide a deep desulphurization and dephosphorization of hot metal and steel in the process of their processing. A review of methods of slag skimming presented, mainly based on slag mechanical shoveling and its removal out of ladles by vacuum sucking. It was shown, that manipulators design for the slag skimming working instrument moving depends on the production scale, mass of the processed heats, amount and properties of the slag to be removed, production process intensity and ecological requirements. Peculiarities of designs and technical parameters of machines for slag skimming presented, designed by Irkutsk plant of heavy machinery, Scientific and Production Enterprise n.a. M.I. Platov, VNIIMETMASH, Kuznetsk and Novolipetsk steel plants. Technological methods of control of slag composition and physical properties considered, first of all of viscosity and fluidity, which have significant effect on selection of a method of slag skimming. Advantages and drawbacks of actions, aimed at more complete slag removal from metal surface by a scraper noted including bath blowing off by an inert gas, liquid slag tapping into am intermediate settling tank following its removal into a slag bowl. In case of satisfactory fluidity it is possible to slag removal by vacuum sucking, which at the same time promoted the melt degassing. Work done in this area abroad noted. Methods of vacuum slag removal developed in the USA and Japan described.

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Upscaling of foam forming technology for pilot scale

TAPPI Journal ◽

10.32964/tj18.8.461 ◽

2019 ◽

Vol 18 (8) ◽

Cited By ~ 1

Author(s):

JANI LEHMONEN ◽

TIMO RANTANEN ◽

KARITA KINNUNEN-RAUDASKOSKI

Keyword(s):

Production Efficiency ◽

Strength Loss ◽

Pilot Scale ◽

Foam Density ◽

Forming Process ◽

Production Scale ◽

Forming Technology ◽

Wet Pressing ◽

Foam Forming ◽

Board Industry

The need for production cost savings and changes in the global paper and board industry during recent years have been constants. Changes in the global paper and board industry during past years have increased the need for more cost-efficient processes and production technologies. It is known that in paper and board production, foam typically leads to problems in the process rather than improvements in production efficiency. Foam forming technology, where foam is used as a carrier phase and a flowing medium, exploits the properties of dispersive foam. In this study, the possibility of applying foam forming technology to paper applications was investigated using a pilot scale paper forming environment modified for foam forming from conventional water forming. According to the results, the shape of jet-to-wire ratios was the same in both forming methods, but in the case of foam forming, the achieved scale of jet-to-wire ratio and MD/CD-ratio were wider and not behaving sensitively to shear changes in the forming section as a water forming process would. This kind of behavior would be beneficial when upscaling foam technology to the production scale. The dryness results after the forming section indicated the improvement in dewatering, especially when foam density was at the lowest level (i.e., air content was at the highest level). In addition, the dryness results after the pressing section indicated a faster increase in the dryness level as a function of foam density, with all density levels compared to the corresponding water formed sheets. According to the study, the bonding level of water- and foam-laid structures were at the same level when the highest wet pressing value was applied. The results of the study show that the strength loss often associated with foam forming can be compensated for successfully through wet pressing.

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The Medium for Intensive Culture of the Diatom Cylindrotheca closterium (Ehrenb.) Reimann et Lewin (Bacillariophyta)

International Journal on Algae ◽

10.1615/interjalgae.v18.i3.70 ◽

2016 ◽

Vol 18 (3) ◽

pp. 279-286 ◽

Cited By ~ 1

Author(s):

V. I. Ryabushko ◽

S. N. Zheleznova ◽

R. G. Gevorgiz ◽

N. I. Bobko ◽

A. S. Lelekov

Keyword(s):

Intensive Culture ◽

Cylindrotheca Closterium

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The Analysis of Potential of Straw Mushroom Development by Using Empty Fruit Bunches Material in Lampung Province

Journal of Engineering and Scientific Research ◽

10.23960/jesr.v1i2.16 ◽

2019 ◽

Vol 1 (2) ◽

Author(s):

Sarono Sarono

Keyword(s):

Palm Oil ◽

Efficiency Ratio ◽

Crude Palm Oil ◽

Production Scale ◽

Empty Fruit Bunches ◽

Straw Mushroom

The empty fruit bunches (EFB) are by-product of crude palm oil (CPO) production, and it is not widely used optimally. One of products produced from EFB with development potentials is straw mushroom. The objective of this research was to analyze the potentials of EFB material and straw mushroom based on EFB material in Lampung province. The result showed that the EFB potential in Lampung province was 111,144 ton annually and straw mushroom was 4,835 ton annually. The biology efficiency ratio of EFB into straw mushroom in production scale was averagely 3.93%. Districts having potentials for developing straw mushroom business by using EFB material were Mesuji, Middle Lampung, Tulang Bawang, Way Kanan, and North Lampung.

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Localized Irrigation System for Thuja Orientalis in Intensive Culture

Ovidius University Annals of Constanta - Series Civil Engineering ◽

10.2478/ouacsce-2018-0014 ◽

2018 ◽

Vol 20 (1) ◽

pp. 119-126

Author(s):

Mădălina Stănescu ◽

Constantin Buta ◽

Geanina Mihai ◽

Lucica Roșu

Keyword(s):

Irrigation System ◽

Ornamental Plants ◽

Point Of View ◽

First Year ◽

Intensive Culture ◽

Technical Point ◽

Production Factors ◽

Thuja Orientalis ◽

Agricultural Farm

Abstract In order to increase the competitiveness of an agricultural holding through the efficient use of the production factors, the modernization of an agricultural farm was carried out by exending the existing greenhouse with at least 700m2 for the intensive cultivation of ornamental plants - Thuja Orientalis. The material is produced by initiating crops in pots, with seedlings grown in pots or transplanting them in pots right after the first year of the multiplication and growing them in containers, appropriate to their size, until reaching their full value. From a technical point of view, reaching the objective will also be possible through a localized irrigation system.

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AM-Serienproduktion für die Automobilindustrie/AM series production for the automotive industry

wt Werkstattstechnik online ◽

10.37544/1436-4980-2020-11-12-16 ◽

2020 ◽

Vol 110 (11-12) ◽

pp. 752-757

Author(s):

Lukas Weiser ◽

Marco Batschkowski ◽

Niclas Eschner ◽

Benjamin Häfner ◽

Ingo Neubauer ◽

...

Keyword(s):

Additive Manufacturing ◽

Automotive Industry ◽

Series Production ◽

Production Scale ◽

Additive Fertigung ◽

Small Series ◽

Start Up ◽

3D Printed ◽

Component Quality

Die additive Fertigung schafft neue Gestaltungsfreiheiten. Im Rahmen des Prototypenbaus und der Kleinserienproduktion kann das Verfahren des selektiven Laserschmelzens genutzt werden. Die Verwendung in der Serienproduktion ist bisher aufgrund unzureichender Bauteilqualität, langen Anlaufzeiten sowie mangelnder Automatisierung nicht im wirtschaftlichen Rahmen möglich. Das Projekt „ReAddi“ möchte eine erste prototypische Serienfertigung entwickeln, mit der additiv gefertigte Bauteile für die Automobilindustrie wirtschaftlich produziert werden können. Additive manufacturing (AM) offers new freedom of design. The selective laser-powderbed fusion (L-PBF) process can be used for prototyping and small series production. So far, it has not been economical to use it on a production scale due to insufficient component quality, long start-up times and a lack of automation. The project ReAddi aims to develop a first prototype series production to cost-effectively manufacture 3D-printed components for the automotive industry.

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Willows Used for Phytoremediation Increased Organic Contaminant Concentrations in Soil Surface

Applied Sciences ◽

10.3390/app11072979 ◽

2021 ◽

Vol 11 (7) ◽

pp. 2979

Author(s):

Maxime Fortin Faubert ◽

Dominic Desjardins ◽

Mohamed Hijri ◽

Michel Labrecque

Keyword(s):

Soil Surface ◽

Field Work ◽

Field Studies ◽

Soil Hydrology ◽

Intensive Culture ◽

Shrub Species ◽

Short Rotation ◽

Pollutant Concentrations ◽

Polycyclic Aromatic ◽

Made In

The Salix genus includes shrub species that are widely used in phytoremediation and various other phytotechnologies due to their advantageous characteristics, such as a high evapotranspiration (ET) rate, in particular when cultivated in short rotation intensive culture (SRIC). Observations made in past field studies suggest that ET and its impact on soil hydrology can also lead to increases in soil pollutant concentrations near shrubs. To investigate this, sections of a mature willow plantation (seven years old) were cut to eliminate transpiration (Cut treatment). Soil concentrations of polychlorinated biphenyls (PCBs), aliphatic compounds C10–C50, polycyclic aromatic hydrocarbons (PAHs) and five trace elements (Cd, Cr, Cu, Ni and Zn) were compared between the Cut and the uncut plots (Salix miyabeana ‘SX61’). Over 24 months, the results clearly show that removal of the willow shrubs limited the contaminants’ increase in the soil surface, as observed for C10–C50 and of 10 PAHs under the Salix treatment. This finding strongly reinforces a hypothesis that SRIC of willows may facilitate the migration of contaminants towards their roots, thus increasing their concentration in the surrounding soil. Such a “pumping effect” in a high-density willow crop is a prominent characteristic specific to field studies that can lead to counterintuitive results. Although apparent increases of contaminant concentrations contradict the purification benefits usually pursued in phytoremediation, the possibility of active phytoextraction and rhizodegradation is not excluded. Moreover, increases of pollutant concentrations under shrubs following migration suggest that decreases would consequently occur at the source points. Some reflections on interpreting field work results are provided.

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