scholarly journals Effectiveness of Microwave Drying for Shrimp Aquaculture Sludge

2021 ◽  
Vol 1 (4) ◽  
pp. 8-15
Keyword(s):  
Chemical Compounds ◽  
Microwave Drying ◽  
Alternative Methods ◽  
Shrimp Aquaculture ◽  
Effective Solution ◽  
Large Area ◽  
Sludge Drying ◽  
Treatment And Disposal ◽  
Disposal Cost ◽  
Soil And Water

Abstract: The disposal of the shrimp aquaculture sludge requires large area and high amount of disposal cost. The improper treatment and disposal can cause soil and water pollution. Sludge drying is an effective solution to reduce the weight of sludge and eventually reduces the disposal cost. This study was aimed to assess the effectiveness of thermal treatment on drying shrimp sludge at different power and time of 270W, 450 W 630W and 60s to 390s, respectively. Heavy metals concentrations and chemical compounds were also determined. Results reveal that the best drying rate recorded were at power and time of 630 W and 240s, respectively. Fourier transform infrared spectroscopy spectrum (FTIR) shows that the main groups presence are aliphatic chains with double bonds, as well as carbonyl, hydroxyl and N–H groups in organic compounds. Sludge drying has proven to be effective in reducing moisture content and organic matters for shrimp aquaculture sludge. It could be considered as one of the alternative methods to handle sludge.

scholarly journals Effectiveness of Microwave Drying for Shrimp Aquaculture Sludge

2021 ◽  
Vol 1 (3) ◽  
pp. 7-13
Keyword(s):  
Chemical Compounds ◽  
Microwave Drying ◽  
Alternative Methods ◽  
Shrimp Aquaculture ◽  
Effective Solution ◽  
Large Area ◽  
Sludge Drying ◽  
Treatment And Disposal ◽  
Disposal Cost ◽  
Soil And Water

The disposal of the shrimp aquaculture sludge requires large area and high amount of disposal cost. The improper treatment and disposal can cause soil and water pollution. Sludge drying is an effective solution to reduce the weight of sludge and eventually reduces the disposal cost. This study was aimed to assess the effectiveness of thermal treatment on drying shrimp sludge at different power and time of 270W, 450 W 630W and 60s to 390s, respectively. Heavy metals concentrations and chemical compounds were also determined. Results reveal that the best drying rate recorded were at power and time of 630 W and 240s, respectively. Fourier transform infrared spectroscopy spectrum (FTIR) shows that the main groups presence are aliphatic chains with double bonds, as well as carbonyl, hydroxyl and N–H groups in organic compounds. Sludge drying has proven to be effective in reducing moisture content and organic matters for shrimp aquaculture sludge. It could be considered as one of the alternative methods to handle sludge.

scholarly journals PENANAMAN POHON SEBAGAI UPAYA MENJAGA CADANGAN AIR TANAH DAN MENCEGAH BAHAYA EROSI DI KECAMATAN CIBIRU

Al-Khidmat ◽  
2019 ◽  
Vol 2 (1) ◽  
pp. 34-39
Author(s):  
Kundang Harisman ◽  
Budy Frasetya ◽  
Adjat Sudrajat ◽  
Suryaman Birnadi ◽  
Maratun Sholeha
Keyword(s):  
Land Use ◽  
Water Conservation ◽  
Agricultural Land ◽  
Community Services ◽  
Tree Planting ◽  
Large Area ◽  
Soil Infiltration ◽  
Land Use Conversion ◽  
Conservation Activity ◽  
Soil And Water

Land use conversion in to settlements and agricultural land affect rainwater can not be infiltrate directly in to the soil. Cibiru District has large area with slope so that this region has high risk of erosion. Soil and water conservation activity through tree planting methode  involving comunity services is startegic effort to overcome potential erosion hazzard and increase soil infiltration. The activity of Community services was held from July-August 2018 in Palasari sub-district which has slope 8-15%. This community services methode used in the form of tree planting workshop and supervision during the manintenance periode. This tree planting program was welcomed enthusiastically by the community. The comunity in Cibiru District is pro active in preservation trees, especially during the dry season.

Applications of Carbon Dioxide Cannon Blasting on the Problem of Triangular Flap Top in Coal Mine Handling Mechanized Mining Face

2012 ◽  
Vol 256-259 ◽  
pp. 71-74
Author(s):  
Yan Bo Zhang ◽  
Er Qiang Li ◽  
Jia Wei Liu ◽  
Xin Jia Leng ◽  
Wen Guo Li
Keyword(s):  
Carbon Dioxide ◽  
Coal Mine ◽  
Effective Solution ◽  
Large Area ◽  
Triangular Flap ◽  
Production Safety ◽  
Mining Face

As mining process in the Mechanized mining face, making it easy come with flap top[1] along the the upward and downward entries. In this paper, through the use of carbon dioxide cannon, we do pre-split blasting experiment on triangular flap top in mechanized mining face, exploring an effective solution to a large area of goaf flap top suddenly breaking down, with the hurricane caused damage and fan-out of toxic and harmful gases, to achieve the purpose of production safety.

Agents and Processes Design for TRU Elements Back Extraction in TRPO Process

2009 ◽  
Author(s):  
Meng Wei ◽  
Xuegang Liu ◽  
Jing Chen
Keyword(s):  
Organic Phase ◽  
Liquid Waste ◽  
Back Extraction ◽  
High Level Liquid Waste ◽  
Trpo Process ◽  
Extraction Processes ◽  
Treatment And Disposal ◽  
High Level ◽  
Disposal Cost

To reduce the long-term risk of the high-level liquid waste (HLLW) and the waste disposal cost, transuranium (TRU) elements should be removed from HLLW. A so-called TRPO process has been developed by Chinese scientists to partition HLLW. In this process, the extractant, trialkyl phosphine oxide (TRPO), is able to extract TRU elements into organic phase completely, which makes the treatment and disposal of raffinate HLLW much easier. However, the treatment of extracted TRU elements in organic phase, in return, becomes new troublesome issue. Generally, there are three promising ways to treat the extracted TRU elements: (1)transmutation; (2)conditioning; (3)recycling U+Pu in Purex-TRPO Integrated Process. In any of the three ways, the back extraction agents and processes play significant roles. In this paper, the investigations on back extraction agents for TRU elements, such as TTHA, DTPA, AHA, HEDPA, DOGA, and carbonates are introduced. The corresponding back extraction processes and experimental results are reviewed.

Chemoattractants: Their essentiality and efficacy in shrimp aquaculture

2021 ◽  
Vol 68 (1) ◽  
Author(s):  
R. Jannathulla ◽  
O. Sravanthi ◽  
H. Imran Khan ◽  
H. Syed Moomeen ◽  
A. Gomathi ◽  
...  
Keyword(s):  
Chemical Compounds ◽  
Nutritional Composition ◽  
Present Review ◽  
Shrimp Aquaculture ◽  
Aquatic Species ◽  
Beneficial Effects ◽  
Shrimp Feed ◽  
High Concentrations ◽  
Plant Sources ◽  
Selection Of

Aquaculture serves as a sustainable source of good quality wholesome food and major input is feed. In recent years, considerable quantities of plant sources have been attempted for inclusion in shrimp feed, due to high demand and high cost of fishmeal. Plant-based ingredients are in general poor in attractability and palatability to aquatic species compared to marine sources. It is desirable to develop an economical and nutritious feed that is attractive and palatable for ensuring reduction of feed wastage. Chemoattractants nowadays are unavoidable in commercial shrimp feeds and are included either individually or in combination. The present review revealed that the various marine sources, in particular krill meal would be more effective for aquatic species, compared to those derived from vegetable origin and chemical compounds. In addition to acting as a feed attractant, marine sources serve as a potential fishmeal substitute due to their rich nutritional composition. However, certain biogenic amines present in these marine-based ingredients need to be examined before their use, since these amines when present in high concentrations reduces feed intake by producing undesirable odour. Use of a combination of chemoattractants would give a better effect, rather than using them individually and compounds from plant origin have limited beneficial effects. The present review concludes that incorporation of chemoattractants would be beneficial in formulation of enriched and economical feeds with better attractability and palatability. The selection of suitable attractant and their supplementation at correct proportion is significantly more important to avoid undesirable effects in cultured shrimp. Further field-based research is needed to predict the actual effects of chemoattractants on farmed shrimp and to provide a sustainable base for the expansion of shrimp aquaculture sector, by reducing feed wastage.

scholarly journals Review of GaN Thin Film and Nanorod Growth Using Magnetron Sputter Epitaxy

2020 ◽  
Vol 10 (9) ◽  
pp. 3050 ◽  
Author(s):  
Aditya Prabaswara ◽  
Jens Birch ◽  
Muhammad Junaid ◽  
Elena Alexandra Serban ◽  
Lars Hultman ◽  
...  
Keyword(s):  
Thin Film ◽  
Chemical Vapor ◽  
Hydride Vapor Phase Epitaxy ◽  
Alternative Methods ◽  
Organic Chemical ◽  
Large Area ◽  
Material Quality ◽  
Pulsed Dc ◽  
Metal Organic ◽  
Magnetron Sputter

Magnetron sputter epitaxy (MSE) offers several advantages compared to alternative GaN epitaxy growth methods, including mature sputtering technology, the possibility for very large area deposition, and low-temperature growth of high-quality electronic-grade GaN. In this article, we review the basics of reactive sputtering for MSE growth of GaN using a liquid Ga target. Various target biasing schemes are discussed, including direct current (DC), radio frequency (RF), pulsed DC, and high-power impulse magnetron sputtering (HiPIMS). Examples are given for MSE-grown GaN thin films with material quality comparable to those grown using alternative methods such as molecular-beam epitaxy (MBE), metal–organic chemical vapor deposition (MOCVD), and hydride vapor phase epitaxy (HVPE). In addition, successful GaN doping and the fabrication of practical devices have been demonstrated. Beyond the planar thin film form, MSE-grown GaN nanorods have also been demonstrated through self-assembled and selective area growth (SAG) method. With better understanding in process physics and improvements in material quality, MSE is expected to become an important technology for the growth of GaN.

Alternatives for Treatment and Disposal Cost Reduction of Regulated Medical Waste

2020 ◽  
pp. 200-212
Author(s):  
Sobiya Gul ◽  
Tasaduq Hussain Shah ◽  
Hafsa Javeed
Keyword(s):  
Health Care ◽  
Geographic Location ◽  
Health Care Industry ◽  
Medical Waste ◽  
Care Industry ◽  
Number Of Factors ◽  
State And Local ◽  
Treatment And Disposal ◽  
Waste Handling ◽  
Disposal Cost

The link between human health and environmental quality is made clearer; the commitment to safeguarding the natural environment is growing in major institutions as the health care industry. New and greater opportunities will open up to reinforce our primary institutional mission-that of caring for the health needs of the community we serve, which include caring for the environment. Developing and implementing effective programs to reduce, recycle and minimize the toxicity of hospital generated wastes (even wastes generated in the care and treatment of patients can be reduced) is one of the most significant environmental challenges the health care industry faces. Hospitals generate one of the most diverse and difficult to manage waste. The amount of medical waste produced by hospitals may vary due to a number of factors, including the hospital type and size, occupancy rate, in- and outpatient ratio, geographic location, state and local waste handling regulations, and hospital waste disposal policies.

Researching on the Energy-Saving Technology of the Feedback Energy Driven Diesel Electric Set

2014 ◽  
Vol 953-954 ◽  
pp. 880-883
Author(s):  
Xu Chen
Keyword(s):  
Control System ◽  
Energy Saving ◽  
Storage Device ◽  
Energy Storage Device ◽  
Effective Solution ◽  
Diesel Generator ◽  
Large Area ◽  
Energy Saving Technology ◽  
Saving Effect ◽  
Generator Sets

Feedback energy recycling is one of the most important energy-saving technologies of diesel generator sets. The current methods of recovering feedback energy are mainly by the energy storage device. However, this method has disadvantages such as the big cost and large area of space. In order to improve the efficiency of feedback energy recycling, the use of feedback energy saving diesel generator set is an effective solution. By improving diesel generator set control system algorithm and ensuring the safety of diesel generator sets, the feedback energy can drive diesel generators running. After the actual verification, this solution is correct, the improved algorithm is effective and the energy-saving effect significantly.

scholarly journals Microwave and convective air on drying of araucaria angustifolia seeds

2021 ◽  
Vol 42 (3Supl1) ◽  
pp. 1487-1498
Author(s):  
Naiara Nobre dos Reis ◽  
◽  
Joyce Yumi Taira ◽  
Leda Battestin Quast ◽  
Ernesto Quast ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Microwave Power ◽  
Microwave Drying ◽  
Alternative Methods ◽  
Total Phenolic ◽  
Araucaria Angustifolia ◽  
Internal Temperature ◽  
Drying Process ◽  
Hot Air ◽  
Conventional Drying

Microwave drying has shorter processing times compared with convection drying, which results in high-quality products and reduced energy consumption. The objective of this study is to evaluate the drying process of Araucaria angustifolia seeds using hot air at atmospheric pressure by applying microwaves (300 W and 500 W), and comparing them with the conventional drying process using hot air (80 °C). The drying time using hot air with microwaves at 500 W and 300 W was reduced by 83.33% and 73.89%, respectively, compared with conventional drying. The drying process occurred in the transient regime, with the predominance of a period of decreasing drying rate. The internal temperature of Araucaria seeds increased with the exposure time to the drying process, whereas the moisture content decreased. This tendency was greater for seeds subjected to electromagnetic fields, especially those exposed to higher power. The total phenolic compounds (TPCs) were lower by microwave drying when compared with conventional drying. The TPC loss was influenced by the internal temperature of the seed. Alternative methods to promote the increased retention of phenolic compounds during the drying process include decreasing the microwave power before the end of drying, combining traditional microwave-associated drying methods, and controlling the applied microwave power.

scholarly journals Insights on solanaceous resistance against tomato leafminer (Tuta absoluta), with emphasis on chemical compounds useful in integrated pest management

2021 ◽  
Vol 49 (4) ◽  
pp. 12543
Author(s):  
Roxana CICEOI ◽  
Mihaela IORDĂCHESCU ◽  
Anca A. UDRIȘTE ◽  
Liliana A. BĂDULESCU
Keyword(s):  
Integrated Pest Management ◽  
Pest Management ◽  
Cultural Practices ◽  
Resistance Mechanism ◽  
Chemical Compounds ◽  
Tuta Absoluta ◽  
Alternative Methods ◽  
Pest Species ◽  
Tomato Leafminer ◽  
Wide Range

For integrated pest management (IPM) and organic farming, breeding resistant varieties is one of the most eco-friendly approaches, that goes along botanicals and other different cultural practices, as the use of companion plants. Among the many pest species that invaded the whole world in the last decades, one of the most frightening is the tomato leafminer, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae), a devastating pest of cultivated tomato worldwide. Tomato is one of the most important agricultural commodities, including the main mean of subsistence in many countries from Africa and middle East. As chemical pesticides failed to control de pest spread and led to many reports of resistant populations, alternative methods for tomato leafminer management must be quickly developed. Many of such alternatives count on a wide range of chemical compounds. The chemical compounds most often responsible for “constitutive resistance”, synthetized by tomato are methyl-ketones (2-tridecanone), sesquiterpenes (zingiberene), and acyl sugars (acylglucose and acylsucrose) while the chemical compounds produced by other plants, used as isolated substances or mixtures, which have antifeedant, growth inhibiting, repellent, and insecticide effects, are azadirachtin, carvacrol, cinnamaldehyde, citronellal, eugenol, linalool, nicotine, pyrethrin, rotenone, thujone, thymol, α-terpineol, 1.8-cineol, etc. Many of them are already commercially available but their efficacy and use differ widely. Therefore, a deeper understanding of the resistance mechanism of solanaceous species related to chemical compounds and substances important for IPM plans developed against T. absoluta is required by the breeding programs.

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