Using a Sewage Treatment Plant

For locations that lack access to the main sewage system, an off-mains solution is crucial to meet the needs of both visitors and residents. This applies to temporary accommodations like campsites in rural areas as well as a small percentage of homes classified as "off grid." It's currently estimated that about 5% of all homes in the UK rely on off-mains solutions. In this blog post, we’ll explore the various options available for such situations, focusing primarily on sewage treatment plants, which are the most popular choice. We'll delve into how they operate, their advantages, maintenance requirements, and the regulations you need to consider before installing one. Key Takeaways: - Septic tanks are no longer allowed to discharge into watercourses due to rule changes in 2020. If you intend to discharge into a watercourse, you must use a sewage treatment plant. - There are several off-mains drainage options, including septic tanks, treatment plants, and cesspools. - Consulting a professional before installing an off-mains drainage system is essential, as there are many rules and regulations to follow. What Sewage Solutions Are Available? When it comes to collecting waste in areas disconnected from the public sewer, there are three main options to choose from: Septic Tanks Septic tanks are common, especially for older or remote properties that are off the grid. Typically made from fiberglass, they feature multiple chambers allowing effluent to separate into liquids and solids. Waste enters the tank via an inlet pipe and remains there for some time while the liquids and solids separate. After separation, the waste forms three layers: solids at the bottom, wastewater in the middle, and grease/oils on top. Naturally occurring bacteria break down the solids, and the liquid can then be safely drained through a drainage field. The remaining sludge is periodically collected by professionals. Septic tanks are relatively affordable and require desludging once or twice a year, making them a cost-effective solution for smaller developments with lower waste outputs. However, if the soil fails a percolation test or lacks space for a drainage field, you'll need to consider alternatives since UK laws prohibit discharging septic tank waste into natural water sources as of 2020. Cesspools Also known as cesspits, these are large sewage holding tanks where waste is fed from a home or building through underground drainage. Unlike septic tanks, cesspools neither treat nor discharge waste; they simply store it. For safety, they're usually fully sealed except for a vent to release built-up gases. While cesspools are the cheapest upfront and easiest to install, they require regular emptying by a tanker due to their inability to treat waste. This results in high maintenance costs, often reaching thousands of pounds annually, outweighing the initial savings. Additionally, since they don't treat waste, cesspools are banned throughout Scotland and are unpopular elsewhere, typically serving as a last resort in areas near drinking water sources where other options are impractical. Sewage Treatment Plants These plants, powered by electricity, are seen as a more advanced version of septic tanks, offering various types and sizes to fit different budgets and occupancy needs. Designed to cultivate helpful bacteria that breaks down waste, they ensure the treated water is clean enough for discharge into nearby natural water bodies like rivers, streams, or reservoirs, with proper permissions from the Environment Agency. This treatment process significantly reduces sludge buildup, requiring emptying about once a year by professionals. Sewage treatment plants are suitable for diverse rural living or working scenarios needing off-mains sewage systems, from isolated single properties to large commercial developments. How Do Sewage Treatment Plants Work? Sewage treatment plants handle wastewater from buildings and households not connected to the main sewer through sedimentation, aeration, and disinfection. By treating toilet, shower, bath, sink, and dishwasher waste, the cleaned water can be discharged into ecosystems like rivers or streams. Sedimentation Wastewater enters the plant and undergoes sedimentation in a primary chamber where gravity separates liquid waste from solid waste via clarification machines. The remaining solid waste, called sludge, is removed during servicing, while the separated liquid waste moves to the next stage. Aeration The liquid waste is then moved to aeration chambers where compressed air increases oxygen levels, promoting bacterial growth to break down the waste. Disinfection Finally, the bacteria settles and is removed, while the cleaned wastewater flows to the discharge point, ensuring minimal pollution. Advantages of Sewage Treatment Plants Sewage treatment plants are becoming the preferred choice over other wastewater systems due to their benefits: - Low Sludge Levels: With less sludge, they require emptying once a year. - Eco-Friendly: Produces non-polluting effluent, around 95% clean. - Lower Running Costs: Cheaper to run and maintain despite higher initial costs. - Discharge Options: Only feasible option for discharging into natural water sources within the UK. Regulations for Water Treatment Plants Installing and operating sewage treatment plants involves strict regulations: - Planning Permission: Often required for new builds or significant changes. - Legal Compliance: Must be EN 12566-3 2005 certified. - Consent to Discharge: Environmental permits are often necessary. Installation Advice Professional installation is recommended due to the complexity and potential consequences of mistakes. Key considerations include: - Building Regulations: Minimum distances from buildings and watercourses. - Odor Management: Placement away from residential areas. - Accessibility: Easy access for servicing vehicles. - Noise Reduction: Positioning to minimize disturbance. - Gravity Utilization: Downhill placement to aid the treatment process. Other Considerations Before installation, factors like drainage pipe depth, outfall distance, pump requirements, and electricity availability must be assessed. Also, remember that treatment plants take around six weeks to become fully operational. Choosing the Right Size Treatment plants come in various sizes to match needs. Consider building size and occupant numbers, allowing for maximum occupancy. General guidelines exist but overestimating is safer. Always check manufacturer specifications. Maintenance Proper maintenance extends the plant's lifespan and ensures compliance: - Annual Servicing: Ensures functionality and microorganism levels. - Regular Emptying: Sludge buildup requires professional removal. - Proper Usage: Avoid flushing non-biodegradable items. - Rainwater Protection: Prevents dilution of bacteria and flooding. Sturdy and Safe At EasyMerchant, we offer top-quality sewage treatment plants from leading manufacturers, featuring energy-efficient machinery. Many products remove over 96.6% of pollutants, ensuring environmentally safe discharge. For more information or personalized advice, our team is ready to assist. Shop Sewage Treatment: Products listed include Klargester BioAir Domestic Sewage Treatment Plant, Marsh Septic Tank Distribution Box, Marsh Poly-Air Activated Carbon Vent Filter, Marsh Cesspool Cesspit Tank, Marsh Ultra Polylok L Commercial Sewage Treatment Plant, Marsh Portapura Treatment Plant, Whisspurr Acoustic Vibration Reduction Unit, and Marsh Uni Gem Septic Tank Conversion Unit.

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