AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |
Back to Blog
Method of wastewater treatment11/13/2023 ![]() This process removes settleable solids, including sand, grit, and organic matter, from the wastewater. The clarified effluent flows out from the top. The flow velocity is reduced, allowing heavier solids and particles to settle to the bottom as primary sludge. Plain sedimentation, also known as primary sedimentation, is a process where wastewater is allowed to settle in large sedimentation tanks or basins. This prevents damage to downstream equipment and ensures smoother operation of subsequent treatment processes. ![]() It involves the use of screens or grates with different opening sizes to intercept and capture objects like sticks, rags, plastics, and larger particles. Systems are easy to install, owner can engage in the installation, thus reducing investment costs.Screening is the initial step in wastewater treatment, where large debris and solids are removed from the wastewater. High efficiency of removal for organic matter, suspended solids and phosphorus. Treatment of wastewater with low concentrations of organic matter that cannot be treated by activated sludge processes. Since most of the technologies are based on wastewater distribution though rather thin pipes, proper mechanical pre-treatment should be provided. Relatively rapid incorporation of the treatment process and achievement of the performance efficiency quality target in a short period of time after the start of operation. Possibilities to operate with enlarged hydraulic loads. Longer time for technical project preparation, because the dimensions of plant have to be calculated on the bases of hydraulic and pollution loads. The possibility of short-term and long-term shutdown. Not in all cases can be used as only WWT solutions Simple maintenance due to simple technology. Low efficiency of ammonia nitrogen removal. Investment costs are comparable with packaged WWT, but operational and maintenance costs are low. WWT systems require more space than packaged WWT plants. The natural character of the sewage facility provide better possibilities to integrate in landscape. There are three types of constructed wetlands used – sub-surface flow constructed wetland, surface flow constructed wetland, hybrid system – a combination of subsurface flow and surface flow systems. The basic principle of this method for sewage treatment is the flow of wastewater through the filtration system, which is planted with vegetation. It may also be used for tertiary treatment of effluent from WWT plants with activated sludge process.Ĭonstructed wetlands are constructed filtration systems planted with vegetation (most often reed) with defined filter material and direction of wastewater flow. It is based on slow filtration of pre-treated wastewater. Constructed WetlandsĬonstructed treatment wetlands represent a biological treatment stage – secondary and/or tertiary. ![]() Natural treatment methods are used either as only WWT solutions for dwelling, hotels, recreational facilities, restaurants and summer camps, if it is allowed by national legislation, or for polishing after septic tank or packaged WWT plant discharge or for infiltration of treated wastewater. Wastewater with high organic content and high load of fats, oils, oil derivatives without pre-treatment are unsuitable for natural wastewater treatment systems.
0 Comments
Read More
Leave a Reply. |