In order for treated wastewater to meet discharge water quality standards, reclaimed water reuse equipment is generally used to treat wastewater to meet discharge water quality standards. water recovered. The process flow of reclaimed water reuse technology can generally be divided into three stages, namely pre-treatment stage, main treatment stage and post-treatment stage. Thus, water reuse technology is generally divided into several stages.
1. Technological stage of reuse of recovered water
1. Pretreatment stage: This stage mainly includes two processing units, one is the grate, the other is the regulating tank. to effectively remove solid impurities in sewage, and at the same time, it can treat water quality uniformly.
2. Main processing stage: At this stage, theorganic matter dissolved in wastewater will be effectively removed. This step therefore constitutes the most critical link.
3. Post-treatment stage: The main function of this stage is to disinfect wastewater. After this treatment step, it can ensure that the effluent reaches the gray water quality standard. in-depth processing process.
2. Three main treatment methods of reclaimed water reuse technology
1. Biological treatment method: suitable for wastewater with high organic content. Generally, biological treatment methods such as activated sludge method, contact oxidation method and biological turntable are used. It can be used alone or in combination with several biological treatment methods, such as contact oxidation + biological filter; biological filter + adsorption on activated carbon and otherss processes; This process has the advantages of strong adaptability to hydraulic load changes, low sludge production, and easy maintenance and management.
2. Physical and chemical treatment methods: activated carbon adsorption is a physical method, and coagulation and precipitation technology is a chemical method. The combination of these two methods has a very good effect on water quality.
3. Membrane treatment method: Use reverse osmosis membrane or ultrafiltration membrane for treatment, which is suitable for situations where water quality changes significantly.
Reclaimed water reuse technology and treatment equipment have a very good effect on wastewater treatment, and the widespread application of reclaimed water reuse technology is d of great importance for the improvement of the environment.
Knowledgepopular scientists: What is the difference between gray water treatment and sewage treatment?
Water Treatment Gray water treatment is a word that does not sound familiar to ordinary people. Gray water refers to recycling. water. . In fact, gray water treatment is not far from our lives. Many families are accustomed to collecting water used for washing laundry and vegetables and using it to flush toilets and clean floors. In fact, this is the most original and simplest method. gray water treatment.
The word gray water originates from Japan. It is a method of water treatment different from water supply (called upper water in Japan) and drainage (called sewerage in Japan). The recovered water is good quality domestic wastewater which is treated with relatively simple techniques and then used as non-potable water. The aeReclaimed u is mainly used for car washing, green area spraying, toilet flushing, cooling water, etc. This makes full use of water resources and reduces environmental pollution caused by direct discharge of wastewater. For cities suffering from lack of fresh water resources and severe water supply shortages, gray water system is an important way to alleviate water shortages, prevent water pollution and protect the environment.
For community residents, the gray water treatment system can provide great benefits. The first is to reduce water bills. For public water such as green water and car wash water, most communities use tap water directly, and this water fee will ultimately be paid to each household owner. If recycled gray water is usedlized, this amounts to using water for two purposes, which represents a considerable expense for a community in one year. Nowadays, residents usually use tap water to flush toilets. If they use gray water, they can save 9 liters of tap water at a time. How many tonnes does the whole family consume in a month? However, due to consumer psychology, many designers do not intend to use gray water for interior cleaning. Of course, the tap water and the collected water will pass through two pipes, which can occupy a certain area.
The cost of the gray water treatment system is very low and will not increase the burden on home buyers. To put it simply, it's just a matter of knowing how many pools to add. The water quality after gray water treatment is also relatively guaranteed and better than river water quality.ordinary eras in urban areas.
The water purification process of the gray water system is also very simple, there are generally three levels. The first step relies mainly on the grid to separate the largest impurities from the water. Since water consumption fluctuates daily, it is necessary to prepare a special tank to regulate the water volume. More than 90% of pollutants present in water are eliminated by secondary treatment. There are mainly biological treatment methods, physical and chemical methods and membrane methods. Not all processing methods require special investments in labor and material resources.
In the past, gray water systems were mainly used in hotels, restaurants, large-scale cultural and sports buildings and other public buildings with relatively high water bills.high and significant water consumption. However, with the continued reduction of water resources and increasing awareness of environmental protection, more and more residential buildings have begun to adopt gray water treatment systems. Recovered water is gradually entering the lives of ordinary people.
What does water alkalinity mean in water treatment?
Alkalinity refers to the content of substances in water that can interact with strong acids. In water, it mainly refers to bicarbonate (HCO3_), Carbonate (CO32_), hydroxide (OH), etc.
Water quality after treatment and reuse
After treatment, the effluent can meet the electroplating water standard, see the table below for details
Acid-base wastewater reuse project
PH 2.5-6.5 6.5-7.5
COD <200 mg/L <5 mg/L
Conductivity rate ≤3000~5000μs/cm≤30μs/cm
Total copper <100mg/l <0.05mg/l
Total nickel <10mg/l <0.05mg /l
The Reclaimed water treatment also belongs to wastewater treatment.
Recovered water treatment is mainly used for recycling. The treated water is relatively clean, like rainwater, and can be used for recycling. landscapes and vehicles after recycling. Cleaning, etc.
Wastewater treatment is a concept for any wastewater treatment, and any wastewater treatment process is considered wastewater treatment
.