What is reclaimed water reuse?

What do you mean by reclaimed water reuse?

The word "reclaimed water" is relative to water supply and drainage. Reclaimed water reuse technology refers to the waste [sewage] water of residential residents.

biological contact oxidation process

After centralized treatment (bath, toilet, laundry room, kitchen and toilet), it can be reused for greening irrigation, vehicle washing, road washing and household toilet washing. Achieve the purpose of saving water in the community.

Wastewater reuse is usually confused with reclaimed water reuse, but it is different. Wastewater reuse means that industrial wastewater is recycled to the production line through UF+RO process, and the recovery rate is relatively lower than 75%. Not used for greening irrigation, vehicle washing, road washing, household toilet washing, etc.

Reuse water: The following two kinds can be called reuse water, but general manufacturers may combine them to improve the recovery rate.

I. Classification by purpose

There are three ways to treat reclaimed water for different purposes.

1. One is to treat it to the standard of drinking water and reuse it directly in daily life, that is, to realize the direct recycling of water resources. This treatment method is suitable for areas where water resources are extremely scarce, but the investment is high and the process is complicated.

2. The other is treated as non-drinking water, which is mainly used for water that does not directly contact with human body, such as flushing toilets, cleaning floors and cars, sprinkling water for greening, fire fighting and industrial common water. This is the usual way of reclaimed water treatment.

3. Industrially, the reclaimed water reuse technology can be used to reprocess the industrial sewage that meets the discharge standards. Generally, equipment such as softener, RO, EDI/ mixed bed will be added to make it reach the level of softened water, purified water and ultra-pure water, and it can be recycled in industry, which not only saves money but also protects the environment.

Second, according to the classification of processing methods

According to the treatment methods, reclaimed water treatment processes are generally divided into three types:

1. Physical treatment method:

Membrane filtration method is suitable for large water quality changes.

The process is characterized by compact equipment, simple operation and little influence by load change.

Membrane filtration method is that the separated solution flows along the surface of the filter membrane at a certain speed under the action of external force, and the solvent, low molecular weight substances and inorganic ions in the solution enter the low pressure side through the filter membrane from the high pressure side and are discharged as filtrate; The polymer, colloidal particles and microorganisms in the solution are intercepted by ultrafiltration membrane, and the solution is concentrated and discharged in the form of concentration.

2. Physical and chemical methods:

It is suitable for the situation that the sewage quality changes greatly. Commonly used methods are: sand filtration, activated carbon adsorption, flotation, coagulation and sedimentation, etc. The process adopts hollow fiber ultrafilter, which is advanced in technology, compact in structure, less in land occupation, intermittent in system operation and simple in management.

3. Biological treatment methods

Suitable for sewage with high organic content. Generally, biological treatment methods such as activated sludge method, contact oxidation method (pictured) and biological turntable are adopted. Alone or in combination with several biological treatment methods, such as contact oxidation+biological filter; Biological filter+activated carbon adsorption; Rotary table ten sand filtration and other processes. This process has the advantages of strong adaptability to the change of hydraulic load, less mud production and easy maintenance and management.

At present, some countries and regions are over-exploiting water resources in an uncontrolled way, and at the same time, the awareness of environmental protection is relatively poor, which makes surface water and groundwater polluted to varying degrees, and the supply of fresh water with good water quality is limited; Secondly, the fresh water source to be developed is far from the centralized water supply point, and the one-time investment cost is high, and some water-deficient areas are unable to expand the water supply capacity. To the extent of non-drinking, the concept of reclaimed water is introduced here. Reclaimed water is high-quality miscellaneous drainage (excluding feces and kitchen drainage), miscellaneous drainage (excluding feces and sewage) and domestic sewage (wastewater) used in people's daily life and production. After being collected and recycled, it can be used as miscellaneous water that is not in direct contact with human body, such as floor cleaning, watering flowers, car washing, air conditioning cooling, toilet flushing and fire fighting. Because its water quality index is lower than the water quality standard of urban water supply and drinking water, but higher than the discharge standard of sewage allowed to be discharged into groundwater, that is, its water quality is between the quality standard of domestic drinking water and the quality standard of sewage allowed to be discharged, it is named "reclaimed water".

The technology of reclaimed water development and reuse has developed rapidly and has been widely used in the United States, Japan, India, Britain and other countries (especially Japan). According to the characteristics of their own countries and regions, these countries have determined the reclaimed water recycling technology suitable for their national conditions and national strength, which makes the reclaimed water recycling technology more and more perfect. In China, this technology has been paid attention to by all levels and relevant departments, and a lot of theoretical research and practical work have been done on water reuse in buildings. ......

What are the methods of reclaimed water reuse? What is the process?

(1) biological treatment method: the organic matter in sewage is decomposed by the adsorption and oxidation of microorganisms in water, including aerobic and anaerobic microbial treatment, and aerobic treatment is generally more.

(2) Physical and chemical treatment: Based on the combination of coagulation and sedimentation (air flotation) technology and activated carbon adsorption, compared with the traditional secondary treatment, the water quality is improved, but the operating cost is higher.

(3) Membrane treatment: Compared with traditional secondary treatment, ultrafiltration (microfiltration) or reverse osmosis membrane treatment has the advantages of high SS removal rate and much less occupied area.

Reclaimed water reuse process 1: raw water → grid → regulating tank → coagulation or air flotation → filtration → disinfection → reclaimed water.

Process 2: raw water → grid → regulating tank → primary biological treatment → precipitation → filtration → disinfection → reclaimed water.

Process 3: raw water → grid → regulating tank → primary biological treatment → sedimentation → secondary biological treatment → sedimentation → filtration → disinfection → reclaimed water.

Process 4: Raw water → grid → regulating tank → coagulation or air flotation → sedimentation → biological treatment → sedimentation → filtration → disinfection → reclaimed water.

What is reclaimed water reuse? What is the standard of reclaimed water reuse?

The quality of reclaimed water must meet the following conditions:

1.

Meet the hygiene requirements. Its indicators mainly include the number of coliforms, the total number of bacteria, residual chlorine, suspended solids, COD, BOD5, phosphide and so on.

2.

Satisfy people's sensory requirements, that is, the feeling of being fast. Its measurement indicators mainly include turbidity, chromaticity, odor and so on.

3.

Meet the structural requirements of equipment, that is, the water quality is not easy to cause serious corrosion and scaling of equipment and pipelines.

Its determination indexes include pH value, hardness, evaporation residue, soluble matter and so on.

The research on reclaimed water in China is getting deeper and deeper. In order to ensure the safe, reliable and reasonable utilization of reclaimed water as domestic miscellaneous water, the Water Quality Standard for Domestic Miscellaneous Water was officially promulgated in September (CJ25

1-89).

What is reclaimed water reuse?

Reclaimed water I know reclaimed water is disposable. After treatment, it can not meet the drinking water standard, but it can be used for other purposes. Reuse should be recycling.

Which water can be used as the source of reclaimed water reuse?

The water sources of reclaimed water reuse are: domestic wastewater and sewage (including bathing, washing, laundry, kitchen and toilet).

What are the application fields of reclaimed water reuse equipment and reclaimed water reuse?

Purified water 1No. water treatment answers for you:

The application scope of reclaimed water recycling equipment and reclaimed water recycling system;

Domestic sewage, hospital sewage treatment, industrial sewage/wastewater treatment (except sewage containing heavy metals), car wash wastewater reuse, landfill/compost leachate treatment. The effluent can be used as miscellaneous water for toilet flushing, road cleaning, fire fighting, urban greening, industrial water supply, circulating water, car washing, building construction and so on.

What is reclaimed water? For example, reclaimed water reuse?

Reclaimed water is water between tap water and sewage, that is, purified water that reaches a certain standard after polluted water treatment, that is, simply treated water. The reclaimed water can be discharged or reused, and the worn reclaimed water must reach a certain reuse standard.

What is the general principle of reclaimed water reuse?

Reclaimed water reuse is a new and efficient environmental protection water treatment technology. The treated water can be used for road cleaning, green irrigation and car washing, generally including physical treatment, biological treatment and physical and chemical treatment.

Is there a difference between sewage reuse and reclaimed water reuse?

Reclaimed water reuse; Need to meet the specified water quality standards,

At present, it is mainly the water quality standard for miscellaneous water.

Sewage reuse; Sewage usually needs to be treated,

Reuse after reaching certain water quality requirements, but the control of water quality depends on the water quality requirements of reuse units.

The mouse moves by itself, scary?

What kind of mouse do you use? Optical mouse will have static electricity due to management reasons.