scholarly journals Prospects for Rooftop Farming System Dynamics: An Action to Stimulate Water-Energy-Food Nexus Synergies toward Green Cities of Tomorrow

2021 ◽  
Vol 13 (16) ◽  
pp. 9042
Author(s):  
Angela Huang ◽  
Fi-John Chang
Keyword(s):  
System Dynamics ◽  
Tap Water ◽  
Farming System ◽  
Environmental Benefits ◽  
Energy Utilization ◽  
Green Water ◽  
Urban Food Security ◽  
Food Supply Chains ◽  
Rooftop Farming ◽  
The Cost

Rooftop farming is a practical solution of smart urban agriculture to furnish diverse socio-environmental benefits and short food supply chains, especially in densely populated cities. This study aims to raise urban food security with less use of public water and energy in food production, through utilizing green water and energy for sustainable management. A system dynamics (SD) model framed across the nexus of climate, water, energy and food (WEF) sectors is developed for a rooftop farm in Taipei City of Taiwan. The urban WEF Nexus is structured to address how local weather affects water and energy utilization to grow vegetables. The SD results showed that the annual yields of sweet potato leaves achieved 9.3 kg/m2, at the cost of 3.8 ton/m2 of harvested rainwater and 2.1 ton/m2 of tap water together with 2.1 kwh/m2 of solar photovoltaic power and 0.4 kwh/m2 of public electricity. This study not only demonstrates that green resources show great potential to make a significant reduction in consuming urban irrigation resources for rooftop farming, but contributes to urban planning through a sustainable in situ WEF Nexus mechanism at a city scale. The WEF Nexus can manifest the rooftop farming promotion as cogent development to facilitate urban sustainability.

The effectiveness of using combined recycled water to improve the quality of poultry meat

2021 ◽  
pp. 74-84
Author(s):  
K.S. Meyramkulova ◽  
A.Zh. Temirbekova ◽  
K.M. Aubakirova
Keyword(s):  
Tap Water ◽  
Meat Products ◽  
Animal Husbandry ◽  
Farming System ◽  
Poultry Meat ◽  
Poultry Production ◽  
Recycled Water ◽  
Poultry Farms ◽  
The Cost ◽  
Poultry Farming

The environmental aspects of poultry production have recently become increasingly political. This applies not only to the cultivation of poultry, but also to the processing and marketing of meat products. Poultry farming is associated with signifi cant environmental risks. Pollution from intensive animal husbandry is not so serious. Poultry farms consume a lot of water, especially when slaughtering poultry, and energy, especially when cooling and further processing meat. An important reserve for reducing the cost of meat entering the consumer market is the creation of an effective poultry farming system. If reducing water consumption by poultry farms becomes one of the priorities of environmental policy, the number of birds may increase, and meat prices may become cheaper. At the same time, when using the purifi ed and recycled water of the slaughterhouse of poultry farms for the technological needs of the slaughterhouse, for example, for washing gutted carcasses outside and inside (which is usually produced by tap water), the quality indicators of meat as a whole signifi cantly increase. Key words: recycling, poultry meat, combined electro-photochemical plant.

scholarly journals Culture of freshwater zooplankton Daphnia magna fed with different feed combination

2020 ◽  
Vol 32 (1) ◽  
pp. 55-59
Author(s):  
MONOWAR ASIF KHAN ◽  
MD. MOHIBUL HASAN ◽  
KIZAR AHMED SUMON ◽  
HARUNUR RASHID
Keyword(s):  
Daphnia Magna ◽  
Tap Water ◽  
Culture Technique ◽  
Green Water ◽  
Mixed Feed ◽  
Freshwater Zooplankton ◽  
Population Count ◽  
Green Pea ◽  
Set Up ◽  
The Cost

The study was focused on the culture of freshwater zooplankton Daphnia magna under differentfeed trials. D. magna was collected from a pond and isolated based on its distinct morphologicalcharacteristics. They were cultured in 12 glass jars containing 700 mL of tap water with different feedingregimes: control (tap water only), green water (25 ml/L) (Tg), yeast (50 g/L) + green water (25 ml/L) (Tyg)and yeast (16.6 g/L) + powdered green pea (16.6 g/L) + brown flour (16.6 g/L) (Tygb). Each of the controland feed trials was set up in three replicates. Feeding and population count took place every third day over anexperimental duration of 21 days. The highest population density of D. magna was found in Tyg on day 15,which was 207.1 individuals/L and the lowest was found in control, which was 23.80 individuals/L. Resultsshowed relatively better growth performance of D. magna in mixed feed trials compared to single or ‘nofeed’ trial. Among three feed trials, Tyg incurred the lowest cost compared to others and the cost toproduction ratio was 7.8. The culture technique that have been standardized in the present study could beapplied to fish hatcheries and nurseries in Bangladesh.

Enhancement in productivity and income sustainability through Integrated farming system approaches for small and marginal farmers of Eastern India

2017 ◽  
Vol 4 (2) ◽  
Author(s):  
SANJEEV KUMAR ◽  
SHIVANI . ◽  
S. K. SAMAL ◽  
S. K. DWIVEDI ◽  
MANIBHUSHAN .
Keyword(s):  
Nutrient Recycling ◽  
Farming Systems ◽  
Fruit Trees ◽  
Farming System ◽  
Eastern Region ◽  
Net Income ◽  
System Productivity ◽  
Integrated Farming ◽  
Systems Models ◽  
The Cost

Integration of different components viz. livestock, fishery, horticulture, mushroom etc. along with field crops not only enhanced productivity but by-products (waste) of one component act as input for another component through resource recycling within the system. Six integrated farming systems models with suitable combinations of Crop, vegetables, fruit trees, fish, livestock, mushroom etc. were made and evaluated at the experimental farm of ICAR Research Complex for Eastern Region, Patna during 2012-16 for harness maximum income, nutrient recycling and employment. Among six combinations, crop + fish + duck + goat resulted as most profitable combination in terms of productivity (RGEY- 22.2t), net income (Rs. 2,15,900/ha), additional employment (170 days/year) with income sustainability index (ISI) by 90.2. Upon nutrient recycling prepared from different wastes from the system Crop + fish + duck + goat combination added N (56.5 kg), P (39.6 kg) and K (42.7 kg) into the soil and reduced the cost of cultivation by 24 percent and was followed by crop + fish + goat combination. Crops grown under IFS mode with different types of manures produced 31 percent higher yield over conventional rice- wheat system. The contribution of crops towards the system productivity ranged from 36.4 to 56.2 %, while fish ranged from 22.0-33.5 %; for goat 25.4-32.9 %; for poultry 38.7 %; for duck 22.0-29.0 %; for cattle 32.2% and for mushroom 10.3 %.

The Optimization Model of Wind Power and Thermal Power Jointly Run under the TOU Price

2013 ◽  
Vol 772 ◽  
pp. 705-710
Author(s):  
Li Wei Ju ◽  
Zhong Fu Tan ◽  
He Yin ◽  
Zhi Hong Chen
Keyword(s):  
Wind Power ◽  
Optimization Model ◽  
Unit Commitment ◽  
Thermal Power ◽  
Peak Load ◽  
Electricity Demand ◽  
Environmental Benefits ◽  
Power Company ◽  
The Cost ◽  
Pollution Emissions

In order to be able to absorb the abandoned wind, increasing wind-connect amount, the paper study the way of wind power, thermal power joint run and puts forward wind power, thermal power joint run optimization model based on the energy-saving generation dispatching way under the environment of TOU price and the target of minimizing the cost of coal-fired cost, unit commitment and pollution emissions. The numerical example finds, the TOU price can realize the goal of peak load shifting, increasing the electricity demand in the low load and reducing electricity demand in the peak load. The model can increase the amount of wind-connect grid, absorb the abandoned wind, reduce the use of coal-fired units under the environment, increase the average electricity sales price and profit of Power Company. Therefore, the model has significant economical environmental benefits

scholarly journals Real Time Electrical Energy Monitoring and Cost Benefit Analysis using Smart Meter

2020 ◽  
Vol 8 (6S) ◽  
pp. 156-160
Keyword(s):  
Real Time ◽  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
Electrical Energy ◽  
Energy Resources ◽  
Energy Utilization ◽  
Daily Lives ◽  
New Energy ◽  
The Cost ◽  
User Friendly

Energy is an essential component in supporting people’s daily lives and is a significant economical element in development of the country. The eventual depletion of conventional energy resources and their harmful impacts on environment as well as the rising energy costs and the limitations of new energy resources and technologies have pushed efficient energy management to the top of the agenda. But how the energy utilization can be managed? A simple answer to this is viable and real time metering, which enables calculation of run time energy consumption and obtaining the real-time as well as cumulative cost. In this research an Innovative hardware and IoT based solution to this problem is availed that could provide live information related to consumption of electricity by various appliances. The methodology used in this research is mainly based on a hardware tool named Elite 440 which is a meter and provides the data about various electrical parameters. This data so obtained is made visible on the dashboard in a user friendly. The data so visible includes various parameters like voltage, current, power factor etc. Also the data so obtained on the dashboard gets updated in each five minutes and simultaneously the cost gets updated which makes it real time monitoring System.

Design of down-Hole Oil-Water Separation and Reinjection in the same Well System with Surface Driving Single Screw Pump

2011 ◽  
Vol 339 ◽  
pp. 595-602 ◽  
Author(s):  
Chuan Wei Zhao ◽  
Zeng Liang Li
Keyword(s):  
General Structure ◽  
Environmental Benefits ◽  
Screw Pump ◽  
Water Separation ◽  
Single Screw ◽  
Innovative System ◽  
Oil Water Separation ◽  
Oil Water ◽  
Oil Production Technology ◽  
The Cost

Down-hole oil-water separation and reinjection in the same well system can reduce the cost of lifting the water and the ground pollution due to the treatment of production water, which can bring good economic and environmental benefits. By combining down-hole oil-water separation technology with surface driving single screw pump oil production technology, the author designed an innovative system of down-hole oil-water separation and reinjection in the same well. In this paper, the general structure, working principle and structure characteristics of the system are introduced. The structure composition and the connection method of each part are described, and the calculation method of basic parameters of the single screw pump in the system is given.

A System Dynamics Approach to Changing Perceptions about Thermal Water Quality Trading Markets

2010 ◽  
Vol 1 (3) ◽  
pp. 1-12
Author(s):  
Asmeret Bier
Keyword(s):  
Water Quality ◽  
System Dynamics ◽  
Point Source ◽  
Thermal Water ◽  
Policy Design ◽  
The United States ◽  
Environmental Benefits ◽  
Shade Trees ◽  
Dynamics Modeling ◽  
Water Quality Trading

Thermal water quality trading markets give point source thermal polluters the option to comply with effluent restrictions by paying nearby landowners to plant shade trees. The shade trees cool the water, offsetting thermal pollution emitted by the point source. Thermal trading has the potential to create greater environmental benefits at a lower cost than traditional regulation, however; only one such program has been implemented to date in the United States. In this regard, a shift in potential stakeholders’ perceptions of these markets could be useful in allowing the markets to spread. This paper explains why system dynamics modeling is a useful tool for creating such a shift in perception, and describes a method of teaching participants about thermal trading. The method begins with a classroom simulation exercise, uses lessons from that exercise to create a model of a thermal trading market, and uses that model to conduct policy design and uncertainty analyses.

scholarly journals Economic, Agronomic, and Environmental Benefits From the Adoption of Precision Agriculture Technologies

2019 ◽  
Vol 10 (1) ◽  
pp. 40-56 ◽  
Author(s):  
Thomas Koutsos ◽  
Georgios Menexes
Keyword(s):  
Precision Agriculture ◽  
Production Efficiency ◽  
Farming System ◽  
Environmental Benefits ◽  
Production Costs ◽  
Modern Agriculture ◽  
Technology Innovations ◽  
Farm Production ◽  
Farming Efficiency ◽  
Lower Production

Precision agriculture (PA) as an integrated information- and production-based farming system is designed to delivery high-end technology solutions to increase farm production efficiency and profitability while minimizing environmental impacts on the ecosystems and the environment. PA technologies are technology innovations that incorporate recent advances in modern agriculture providing evidence for lower production costs, increased farming efficiency and reduced impacts. However, the adoption of the precision agriculture technologies has encountered difficulties such as additional application or management costs and investment on new equipment and trained employees. Some of these PA technologies were proven efficient, providing tangible benefits with lower costs and as a result they quickly gained scientific interest. To investigate further the economic, agronomic, and environmental benefits from the adoption of PA technologies a systematic review was conducted, based on the systematic search and evaluation of related eligible articles.

scholarly journals Renewable Energy Utilization in Rural Residential Housing: Economic and Environmental Facets

Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6637
Author(s):  
Aleksandra Siudek ◽  
Anna M. Klepacka ◽  
Wojciech J. Florkowski ◽  
Piotr Gradziuk
Keyword(s):  
Renewable Energy ◽  
Emission Reduction ◽  
Ghg Emissions ◽  
Environmental Benefits ◽  
Energy Utilization ◽  
Energy Sources ◽  
Construction Technology ◽  
Single Family ◽  
Co2 Emission Reduction ◽  
Supply Source

Energy and climate policies benefit from modernized construction technology and energy supply source choices. Energy-efficiency improvement and CO2 emission reduction will result from renewable energy (RE) utilization in new and retrofit single-family houses in rural Poland. Several house construction scenarios and heating energy sources comparing building costs and potential emission reduction are based on already existing structures calculated for a 100 m2 dwelling corresponding to the average rural home. With the addition of thermal insulation and RE-generating equipment, construction costs increase, but the energy costs of operating the home dramatically shrink between a conventional and energy-neutral house. The latter scenario includes thermal solar panels and a heat pump as heating energy sources as well as electricity-generating PV panels. Replacing coal with environmentally-friendly RE reduces CO2 emissions by about 90% annually. Additionally, lower dependence on coal lessens other GHG emissions leading to immediate air quality improvement. New house building regulations guide homeowner construction and heating energy choice, but even larger gains could result from retrofitting existing rural houses, expanding environmental benefits and generating energy bill savings to households. However, the varying climate throughout Poland will require the purchase of energy in winter to assure residents’ comfort.

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