scholarly journals Treatment of Nitrogen in Recycle Water Using Immobilized Microbial Media

2019 ◽  
Vol 41 (4) ◽  
pp. 191-195
Author(s):  
Ji Sook Kim ◽  
Dong Chul Shin ◽  
Jung Tae Park ◽  
Hye Min Jeong ◽  
XinYi Ren ◽  
...  
Keyword(s):  
Recycle Water

scholarly journals CHARACTERIZATION AND STUDY OF THE KINETICS OF SEDIMENTATION OF REJECT OF THE IRON ORE INDUSTRY

2018 ◽  
Vol 15 (30) ◽  
pp. 647-653
Author(s):  
J. H. M. SANTOS ◽  
P. C. M. SANTOS ◽  
F. T. VIEIRA ◽  
J. D. FABRIS ◽  
A. B. REIS ◽  
...  
Keyword(s):  
Iron Ore ◽  
Negative Impact ◽  
Mining Industry ◽  
Water Recovery ◽  
Recycle Water ◽  
Industrial Activity ◽  
The Earth ◽  
Energy Spectrometer ◽  
Kinetics Of ◽  
Scanning Electron

Currently the mining industry plays an important role in the generation of wealth of a country through the exploitation of natural resources of the earth, and in some cases, responsible for a significant fraction of the economic matrix. Like any other industrial activity, mining has a negative impact on the environment, which leads the industry to constantly face the challenge of achieving the sustainability of its activities. The study aimed to characterize the iron ore reject seeking the feasibility of reprocessing and water recovery. The reject sample was characterized using Scanning Electron Microscopy with Dispersive Energy Spectrometer. Studies of the sedimentation kinetics of the tailings were carried out to implement techniques to recover the iron present in the tailings and recycle water in the mineral processing. In the sedimentation tests it was possible to recover approximately 50% of water without compromising the transport operations of the material. It can be concluded that the ore reject analyzed is composed mainly of Fe and Si respectively, showing that the reject has reprocessing potential, and recovery of water present in the clarified.

Nitrogen removal by recycle water nitritation as an attractive alternative for retrofit technologies in municipal wastewater treatment plants

2004 ◽  
Vol 49 (5-6) ◽  
pp. 39-46 ◽  
Author(s):  
K.-I. Gil ◽  
E. Choi
Keyword(s):  
Wastewater Treatment ◽  
Nitrogen Removal ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Biological Nutrient Removal ◽  
Recycle Water ◽  
Municipal Wastewater Treatment ◽  
Effluent Quality ◽  
Municipal Wastewater Treatment Plants ◽  
Final Effluent

The recycle water from sludge processing in municipal wastewater treatment plants causes many serious problems in the efficiency and stability of the mainstream process. Thus, the design approach for recycle water is an important part of any biological nutrient removal system design when a retrofit technology is required for upgrading an existing plant. Moreover, the application of nitrogen removal from recycle water using the nitritation process has recently increased due to economic reasons associated with an effective carbon allocation as well as the minimization of aeration costs. However, for the actual application of recycle water nitritation, it has not been fully examined whether or not additional volume would be required in an existing plant. In this paper, the addition of recycle water nitritation to an existing plant was evaluated based on a volume analysis and estimation of final effluent quality. It was expected that using the reserve volume of the aeration tank in existing plants, recycle water nitritation could be applied to a plant without any enlargement. With the addition of recycle water nitritation, it was estimated that the final effluent quality would be improved and stabilized, especially in the winter season.

Kasza: design of a closed water system for the greenhouse horticulture

2008 ◽  
Vol 58 (3) ◽  
pp. 713-725 ◽  
Author(s):  
Raphaël T. van der Velde ◽  
Wim Voogt ◽  
Pieter W. Pickhardt
Keyword(s):  
The Netherlands ◽  
Reverse Osmosis ◽  
Conceptual Design ◽  
Water Cycle ◽  
Water System ◽  
Recycle Water ◽  
Salt Tolerant ◽  
Low Sodium ◽  
Closed Water ◽  
Greenhouse Horticulture

The need for a closed and sustainable water system in greenhouse areas is stimulated by the implementation in the Netherlands of the European Framework Directive. The Dutch national project Kasza: Design of a Closed Water System for the Greenhouse Horticulture will provide information how the water system in a greenhouse horticulture area can be closed. In this paper the conceptual design of two systems to close the water cycle in a greenhouse area is described. The first system with reverse osmosis system can be used in areas where desalination is required in order to be able to use the recycle water for irrigation of all crops. The second system with advanced oxidation using UV and peroxide can be applied in areas with more salt tolerant crops and good (low sodium) water sources for irrigation. Both systems are financially feasible in new greenhouse areas with substantial available recycle water.

The Device of the Automatic Backflow in Solar Water Heater-Temperature Control and Backflow for Pipe of Water Heater

2013 ◽  
Vol 827 ◽  
pp. 99-104
Author(s):  
Bin Li ◽  
Xi Chen ◽  
Xin Hao Li ◽  
Lu Kuan Ma ◽  
Wen Bo Lu ◽  
...  
Keyword(s):  
Water Resources ◽  
Cold Water ◽  
Hot Water ◽  
Water Tank ◽  
Solar Water Heater ◽  
Recycle Water ◽  
Delay Effect ◽  
Water Heater ◽  
Domestic Water ◽  
Solar Water

Now in general use in solar water heater, there is a long pipeline between water heater and tap, we have to empty the stored cold water before we use the hot water; and usually the water cannot meet required temperature due to the heating delay effect, thus the water also should be emptied, which leads to a waste of water resources. In order to solve this water wastage, we propose a device which can help to control the temperature and backflow of the water in water heater. The device accomplishes backflow of cold water automatically under the effect of gravity, and refluxed water will be stored in the recycle-water tank, thus ensuring the result that the water temperature satisfies the requirement. After the recycle-water tank is full, it will trigger the buoy to control the relay switch, then the water pump start to work to force the water into the water heater tank. Thus, realizing the recycling of water. This device can significantly save water resources in domestic water, and it has a broad market prospect.

Diode-Pumped Yb:YAG Thin Disk Laser with a Novel Multi-Pass Pump and Cooling Arrangement

2013 ◽  
Vol 423-426 ◽  
pp. 2074-2077
Author(s):  
Qiong Ge Song ◽  
Guang Hua Cheng ◽  
Jiang Feng Zhu
Keyword(s):  
Resonant Cavity ◽  
Thin Disk ◽  
Water Cooling ◽  
Recycle Water ◽  
Cooling Device ◽  
Spherical Lens ◽  
Pump System ◽  
Disk Laser ◽  
Thin Disk Laser ◽  
Diode Pumped

We demonstrate a Yb:YAG thin disk laser with multi-pass diode-pumped structure and direct water cooling device. In the pump system, four passes of the pump radiation are focused on the thin disk using a center-punched spherical lens. The thin disk serves as the window of a copper tank and is directly cooled with recycle water-contacted method. The thin disk laser has a low pump at the threshold of operation. We obtained 450 mW output power around 1030 nm in a simple F-P resonant cavity.

Safe Use of Wastewater in Agriculture Through Bioremediation Processes

2021 ◽  
pp. 354-368
Author(s):  
Rachana Dubey ◽  
Arbind Kumar Choudhary ◽  
Janki Sharan Mishra ◽  
Ashutosh Upadhyaya ◽  
Sharad Kumar Dwivedi ◽  
...  
Keyword(s):  
Climate Change ◽  
Heavy Metals ◽  
Ecosystem Services ◽  
Water Treatment ◽  
Food Chain ◽  
Wastewater Reuse ◽  
Recycle Water ◽  
Human Beings ◽  
Water Treatment System ◽  
Bioremediation Processes

Population growth, industrialisation, urbanisation, and climate change have created huge pressure on freshwater resources to fulfil the demand. Approx. 70-80% of the freshwater supply returns as wastewater, which is difficult to tackle and manage. We need to tackle the freshwater demand from different sectors like domestic, industrial, and agriculture. Most important is how to use the wastewater safely in agriculture. Therefore, it is an apt time to refocus on ways to recycle water especially in sectors like agriculture and for ecosystem services. The major concern in using wastewater in agriculture is its quality as the wastewater may carry pathogens, heavy metals, and many other pollutants, which might reach to human beings and animals via food chain. A solution to wastewater reuse is through bioremediation techniques. Bioremediation should be considered as a feasible and futuristic technology for safe use of wastewater in agriculture as it will reduce the burden on centralised water treatment system as well as it being economic and eco-friendly.

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