Study on Water Source Emergency Protection in an Active Mode in China

2010 ◽  
Vol 113-116 ◽  
pp. 864-870 ◽  
Author(s):  
Xin Xi Zhang ◽  
Lei Ding ◽  
Ming Ming Wang ◽  
Xiao Bing Hu ◽  
Hui Ping Deng

In order to build an emergency system for emergency accident of water pollution, the technological ideology of active emergency protection was put forward. The fixed point pollution source was taken as the study object and the diffusion model of water was used to set up the new method of water resource protection area division in active mode. Based on this new method, the water protection system with active control was built and the roles of different government departments in this system were given. The various active control technologies, such as storage tank for emergency accident, zero discharge, etc, discussed in this paper will help to water pollution control for emergency accident. The active mode method provides reference for water resources management.

Author(s):  
N. Thyagaraju

The present seminar paper mainly highlight  the concept of  water pollution, causes of water pollution,  Its Effects, Elements of  pollutants, Methods  used to prevent the water pollution in environment  and the mandatory initiatives taken by the concerned authorities for prevention of  water pollution. Water   is essential for survival of all living organisms on the earth. Thus for human beings and plants to survive on land, water should be easily accessible. The term “Pollution” is generally refers to addition of any foreign body either living or non – living or deletion of anything that naturally exists. The basic Sources of Water pollution causes due to Culmination into lakes, rivers, ponds, seas, oceans etc. Domestic drainage and sanitary waste, Industrial drainage and sewage, Industrial waste from factories, Dumping of domestic garbage, Immersion of Idols made of plaster of Paris, Excess use of Insecticides , pesticides, fungicides, Chemical fertilizers, Soil erosion during heavy rains and floods, Natural disasters, tsunami etc. General pollutants  which are also caused for water pollution  which include Organic, Inorganic, and Biological entities, Insecticides, Pesticides, Disinfectants ,Detergents, Industrial solvents, Acids, Ammonia fertilizers, heavy metals, Harmful bacteria, Virus, Micro –Organisms and worms, Toxic chemicals. Agricultural lands become infertile and thereby production also drops, Spread of epidemic diseases like Cholera, Dysentery, Typhoid, Diarrhea, Hepatitis, Jaundice etc. The  basic responsibility of the Government, NGOs, National Pioneer scientific Research Institutions may conduct  research oriented programs on control of water pollution by create  awareness among the public through mass media and Environmental Education on recycling units,  and  water treatment plants must be established both at domestic levels and Industry levels, Every citizen must feel responsible to control water pollution. There have been many water pollution prevention acts that have been set up by the governments of the world. But these are not enough for permanent water pollution solutions. Each of us needs to take up the responsibility and do something at an everyday at individual level. Otherwise we can’t survive in a society forever in a future. 


1991 ◽  
Vol 23 (10-12) ◽  
pp. 2135-2140 ◽  
Author(s):  
Zhang Zhongxiang ◽  
Qian Yi

With the development of industrial economy and urban construction, water pollution and water shortage in China have become very serious problems in recent years. In this paper, a general picture on water pollution and water shortage in China is described. The regulations of technical policy of Water pollution prevention and control of PRC are introduced. The major measures of water saving in industries and cities are presented. The reuse of reclaimed municipal wastewater as a secondary water source is recommended. Some demonstration projects of wastewater reuse for different uses are presented. Research works concerning reuse and recycling system of industrial wastewater are presented as well.


Synthesis ◽  
2019 ◽  
Vol 51 (19) ◽  
pp. 3758-3764 ◽  
Author(s):  
Sébastien Redon ◽  
Anne Roly Obah Kosso ◽  
Julie Broggi ◽  
Patrice Vanelle

The first ipso-selenocyanation of arylboronic acids is achieved using selenium dioxide and malononitrile under mild conditions. The reaction is successful even without metal or base in DMSO. The major advantages of this new method are an easy set-up, excellent yields, and the use of odorless and inexpensive selenium reagents. Basic conditions subsequently afford new access to diaryldiselenides in good yields without isolating the organoselenocyanate intermediates.


2013 ◽  
Vol 639-640 ◽  
pp. 1092-1095
Author(s):  
Guang Hui Wang ◽  
Lian Shen ◽  
Cheng Long Wei

This paper aims to put forward a new method of strengthening the existing bridges with narrow decks and low bearing capacity to overcome the high cost and pollution problems in dismantling them. The method, strengthening bridges by built stringers and cross beams, is by widening some parts of a bridge. Based on the basic theory of finite element, we have set up an analysis model of strengthening the bridges by widening, which helps to demonstrate the rationality of this method. Meaningful conclusions have been drawn from the parameter analysis of the rigidity of the new widening stringers, the rigidity of the new cross beams and the relative settlement of the new and the old foundations. This method can be referenced by the reinforcement and maintenance of medium and small bridges.


1977 ◽  
Vol 20 (1) ◽  
pp. 87-89
Author(s):  
I. A. Khasin ◽  
M. I. �tingof

2002 ◽  
Vol 36 (1) ◽  
pp. 70-75 ◽  
Author(s):  
Phil Turner ◽  
Ray Berkelmans ◽  
Matt Brodie

Experimental research into the upper thermal limits of corals is underpinned by the need for precise control of water temperature in the testing environment, with evidence that temperature differences of as little as 0.1°C can be a significant factor in whether coral bleaches or not. Off-the-shelf temperature control equipment is generally unsuitable for high precision temperature experiment because the realized accuracy of temperature control is typically less than 0.5°C, even from state-of-the-art proportional, integral, derivative (PID) control technology. However, high temperature resolution and accuracy is achievable using simple control technology. This paper reviews the principles behind two temperature control technologies and describes a system capable of controlling temperature in actual experimental conditions to better than ±0.05°C over a 24-hr period and typically better than ±0.1°C over a 12-day period. This result is obtained through appropriate design of the experimental tank set-up and the use of “on-off” temperature control technology with very small hysteresis. Accuracy of set-point temperature is maintained by calibration against a reference temperature. Sensor drift, resulting from ambient temperature fluctuations, is avoided by immersing the circuitry in the temperature-controlled water.


2015 ◽  
Vol 764-765 ◽  
pp. 768-772
Author(s):  
Shih Sung Lin ◽  
Yu Wei Liu

By using image processing and automatic control technologies, this study designs an unmanned ground vehicle (UGV) that can be operated by various control devices, such as laptops and joysticks. A camera is set up on the UGV to capture the sight around it, and then can send the video to the back end system in a wireless manner. Besides, we design an attacking system that allows users to do the zeroing correction for shooting the target precisely. Moreover, a shooting training system is designed to improve the convenience for target practice. It not only can send the result to the back end system immediately but also can simulate the enemy movement to make the training more reality.


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