DOMESTIC WATER TREATMENT SYSTEM
1. Introduction
- Domestic wastewater is the wastewater generated from daily life activities of residential communities such as urban areas, commercial centers, entertainment areas, offices, etc
- The main polluting components commonly found in domestic wastewater are BOD5, COD, Nitrogen and Phosphorus. An important polluting factor in domestic wastewater is pathogens that are transmitted by microorganisms in feces. Microorganisms that cause disease in humans include the main groups of viruses, bacteria, protozoa and helminths.
2. Norms on assessment of domestic wastewater
- According to the National Technical Regulation on domestic wastewater (QCVN 14: 2008 / BTNMT)
3. Technology of domestic wastewater treatment
With the pollutant component is the pollutant impurities with different properties, from insoluble substances to low solubility substances and also water-soluble compounds, the Domestic wastewater treatment is to remove those impurities, clean the water and be able to put water into the receiving source or reuse. The ion of an appropriate treatment method is often based on the characteristics of the impurities in the wastewater. The principle of wastewater treatment technology ion depends on:
• Composition and properties of wastewater
- The necessary level of wastewater treatment
- Flow and discharge mode
- Characteristics of receiving sources
- Site conditions and topography of the area planned for the construction of the wastewater treatment plant
- Hydrogeological and climatic conditions in the planned area
- Infrastructure conditions (electricity supply, water supply, traffic)
- Operating conditions and management of wastewater treatment systems
- Wastewater treatment technology for domestic activities in general often depends on the size of the population (ie depends on the flow of wastewater).
4. The main methods commonly used in domestic wastewater treatment projects
- Chemical methods, physical and chemical methods, and biological methods.
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