Using a Sewage Treatment Plant

For places not connected to the main sewer system, an off-mains solution is crucial to meet the needs of both residents and visitors. This applies to temporary accommodations like campsites in rural areas as well as a small percentage of homes that are considered "off-grid"—around 5% of UK homes rely on such solutions. In this article, we'll explore the various options available for off-mains sewage management, focusing particularly on sewage treatment plants, which are the most popular choice. We’ll discuss how these plants work, their benefits, maintenance requirements, and the regulations you need to follow before installing one. Key Points: - Septic tanks should no longer be discharged into watercourses since the rules changed in 2020. For discharge into waterways, a sewage treatment plant is necessary. - There are three main off-mains drainage options: septic tanks, cesspools, and sewage treatment plants. - Professional consultation is essential before installing any off-mains drainage system due to the complex regulations involved. What Sewage Solutions Are Available? When it comes to managing waste in areas disconnected from public sewers, there are three primary solutions to choose from: Septic Tanks Septic tanks are common, especially for older or remote properties. Typically made from fiberglass, they feature multiple chambers that allow effluent to separate into liquids and solids. Waste enters the tank via the inlet pipe and separates naturally over time into three layers: solids at the bottom, wastewater in the middle, and oils or grease on top. Bacteria in the tank breaks down the solids, allowing the liquid to drain safely through a drainage field. The remaining sludge is periodically removed by professionals. While cost-effective and low-maintenance, septic tanks require desludging once or twice a year and cannot be discharged into watercourses under current UK legislation. Cesspools Also known as cesspits, these are large storage tanks that collect but do not treat waste. They are typically sealed except for a vent to release gases. Cesspools are inexpensive upfront and easy to install but necessitate frequent emptying by a tanker due to their inability to treat waste. This ongoing expense can outweigh the initial savings, making them less popular. Additionally, cesspools are banned in Scotland and rarely used elsewhere unless no other options are viable. Sewage Treatment Plants These electrically-powered systems are seen as a modern upgrade to septic tanks, offering a range of sizes and types to suit different needs and budgets. Treatment plants promote the growth of beneficial bacteria that break down waste, ensuring it's clean enough for discharge into nearby water bodies with the appropriate permissions. Unlike septic tanks, treatment plants significantly reduce sludge buildup, requiring emptying only once a year. How Do Sewage Treatment Plants Work? Treatment plants operate through sedimentation, aeration, and disinfection to purify wastewater from homes and buildings. This process ensures that water from toilets, showers, sinks, and dishwashers is clean enough to be released into ecosystems like rivers or streams. Sedimentation Wastewater enters a primary chamber where gravity separates liquid waste from solids. The clarified solids are removed during servicing, while the liquid moves to the next stage. Aeration The separated liquid is aerated to boost oxygen levels and encourage bacterial growth needed for breaking down waste. Disinfection Finally, the treated water is disinfected and settled before being discharged into approved water bodies. Advantages of Sewage Treatment Plants Treatment plants are becoming the preferred choice due to several key advantages: - Low Sludge Levels: With less sludge buildup, they require less frequent emptying. - Eco-Friendly: Produces cleaner effluent compared to other systems. - Lower Costs: Though initially more expensive, they are cheaper to maintain. - Discharge Options: Only feasible option for discharging into watercourses. Regulations for Sewage Treatment Plants Installing and operating these systems requires adherence to strict regulations: - Planning Permission: Often needed for new builds or significant changes. - Legal Compliance: All plants must comply with EN 12566-3 2005 standards. - Consent to Discharge: Required if discharging into surface waters. Installation Advice Professional installation is highly recommended due to the complexity and potential environmental impacts. This includes soil testing, calculating pipe lengths, excavations, and ensuring compliance with all regulations. Choosing the Right Size Selecting the appropriate size depends on the building’s size and the number of occupants. It’s wise to overestimate to avoid future issues. Maintenance Regular servicing and proper usage are vital for longevity. Avoid flushing non-biodegradable items and antibacterial cleaners to prevent disruptions. Conclusion At EasyMerchant, we provide top-quality sewage treatment plants from leading manufacturers. Our products are designed to remove over 96.6% of pollutants, ensuring environmental safety. Contact our team for advice tailored to your specific needs.

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