Along with the rapid increase of national water use, water crisis, all parts of the world reported water problem has become a worldwide problem, every country attaches great importance to the water problem, reflect its own characteristics and our country, large population, per capita water less, at present, our country has more than 400 cities appear different degree of water shortage, of which more than 130 cities, serious said, the lack of water resources seriously restricted the economic and social development in our country.
due to water shortage phenomenon in the chain, and mainly pollution in cities is lighter, a large number of sewage after treatment, can get considerable reclaimed water, the second water source can make water city, greatly ease the phenomenon of urban water shortage, water reuse, water is relative to the water supply, drainage, water reuse technology refers to the community residents centralized wastewater treatment after reach a certain reuse standard for residential green water, car washing, roads, family implement rinse, etc, so as to achieve the purpose of saving water.
water reuse technology, for example,
life water, sewage treatment, reached after using standard, used for flushing, greening, landscaping, road spraying and cooling water supplement and other miscellaneous, water quality should reach & lt;
Life miscellaneous water water quality standards & gt;
。
1, water water
choose water, drainage, should first selection of quality can generally be in accordance with the following step by step choice:
2, 1, cooling water shower water
3, dishes washed drainage drainage
4, laundry 5
6, toilet, kitchen drainage drainage
2, technique when drainage is the most high-quality miscellaneous drainage and miscellaneous water in the water, can be used predominantly physico-chemical treatment processes, or use of biological treatment and physical and chemical treatment process
when using sewage water in the most water, can be used two period of treatment, or biological treatment combined with physical and chemical processing technological process.
3, water design in building regulations
all construction projects are due to design water facilities at the same time, in accordance with provisions of the following projects must be supporting design construction of water facilities:
A hotels, restaurants, stores, apartments and comprehensive service buildings and high-rise residential building construction area of over 20000 square meters.
B departments, scientific research institutions, colleges and universities and large comprehensive culture, the sports facilities construction area of over 30000 square meters.
C population residential district planning in more than 3 square
about water facilities management according to the ministry of construction issued the 'interim measures for urban water facilities management', the design of water facilities according to the China engineering construction standardization association's 'specification for design of building water
water reuse technology its characteristic is using various physical, chemical and biological methods such as sent by industrial wastewater for the processing of different depth, meet the process requirements of water quality, and then reuse in the process, so as to save water, reduce environmental pollution.
Here are two of the most main reuse is introduced that the technology:
(
A)
save cooling water cooling water technology is the main way of water-saving in industry:
1.
indirect instead of direct cooling water for cooling water in cooling process, especially in the chemical industry, such as using the method of direct cooling, often with more pollutants in the water, the recycling value, such as can instead of indirect cooling, can the customer the shortcomings.
1, to reduce the cooling requirements, reduce water consumption
2, USES the water cooling, such as in a process, the use of air cooling or oil cooling, to achieve the purpose of cooling.
3, use a manhole cold source or water for cooling water, reduce groundwater or fresh water consumption.
4, reasonable use of cooling water.
can be used for cooling water after cooling the repeated use, can also be used as cooling water for the first time, for other water quality, water temperature occasions with low requirements.
when using this method, pay attention to the water supply system of a workshop close cooperation, strengthen the management of the cooling water, avoid a link in the water supply problem two influence other workshop
5, cooling water recycle
the cooling water utilization technology is mainly through the cooler into the hot water through the cooling water temperature structure of the water, water temperature and cooling water circulation use
when used in the cycle of bacteria in water should be paid attention to reproduce, the formation of the scale, the change of quantity of equipment corrosion, who ah,
(
2)
Multi-purpose monohydrate or sewage purifier reuse
because of the production process of a link with different water quality, so will some links of water after dealing with the appropriate CongFu use or used for other requirements for water quality is not high in the link, already achieved the purpose of water saving, such as: can use clear water as cooling water first, and then into the water treatment equipment after softener for boiler water supply, urban sewage concentrated treatment after used in the production, life, etc.
