Posted by Callum Vallance-Poole, on August 15, 2024.
Installing a sewage treatment plant can seem like a daunting task, but here at GRAF UK, our team of experts has produced this handy guide to ensure you have all the bases covered.
Assessing Site Requirements
Before installing a sewage treatment plant, it’s crucial to familiarise yourself with local regulations and obtain the necessary permits. Different regions may have specific requirements for installing and operating sewage treatment systems, including setback distances, discharge limits, and environmental considerations. Consulting with local authorities or regulatory bodies can provide valuable insights into legal requirements and ensure compliance throughout the installation.
Conducting Site Surveys and Soil Tests
A thorough site survey is essential for determining the location suitable for installing a sewage treatment plant. Factors such as soil type, groundwater levels, and topography can influence the effectiveness and efficiency of the system. Conducting soil tests can help identify any potential issues, such as poor drainage or soil composition, that may impact the installation or performance of the treatment plant. By assessing site conditions upfront, you can make informed decisions and mitigate potential challenges during the installation process.
Factors to Consider When Selecting a Sewage Treatment Plant
Several factors should influence your choice of sewage treatment system. Property size plays a significant role, as larger properties will require a larger system to handle higher volumes. Consider your water usage patterns, including the number of occupants and daily water consumption. Other factors to contemplate include site conditions, budget constraints, and long-term maintenance requirements. By carefully reviewing these considerations, you can find the best sewage treatment system that effectively meets your needs.
Preparing the Site
Before beginning the installation of a sewage treatment plant, thorough site preparation is essential to ensure optimal performance and longevity of the system. Here’s how to prepare the site effectively:
Excavation
Make sure you have enough space to work by digging a trench that exceeds 500mm plus the tank’s dimensions at the base of the tank.
Maintain a minimum distance of 1000mm from solid constructions to prevent interference with the installation.
Design the trench embankment to prevent slippage or collapse, ensuring a horizontal and plane construction site with sufficient load-bearing capacity.
Dimension the trench depth to accommodate the maximum earth coverage above the tank without exceeding installation conditions.
Install the tank and water-conducting parts of the system in the frost-free area, typically 600mm to 800mm deep, to facilitate year-round operation. Obtain precise, in-depth information from the responsible authority.
Apply a foundation layer of compacted, round-grain gravel (10–20mm grain size, 150–200mm thickness) to provide stable support.
Slope and Embankment:
If installing the tank near a slope, earth mound, or slope within 5 metres, erect a statically calculated supporting wall to absorb soil pressure.
The supporting wall should exceed the tank dimensions by at least 500mm in all directions and be located at least 1000mm away from the tank to ensure stability.
Groundwater and Soil Conditions:
Ensure sufficient dissipation if tanks are anticipated to be immersed deeper into groundwater than indicated in adjacent figures, especially in cohesive, water-impermeable soils.
Consider dissipation of drainage water, such as via an annular drainage system, in the case of cohesive, water-impermeable soils.
Installation Adjacent to Surfaces Used by Vehicles:
Maintain a minimum distance from surfaces used by vehicles heavier than passenger cars, equivalent to at least the depth of the trench.
By meticulously preparing the site according to these guidelines, you’ll lay the groundwork for a successful sewage treatment plant installation and ensure optimal functionality for years to come.
Installing the Sewage Treatment Plant
Installing a sewage treatment plant requires careful attention to detail to ensure proper functionality and effectiveness:
1. Installing the Primary and Secondary Chambers:
Begin by positioning the primary and secondary chambers in the prepared trench according to manufacturer specifications.
Ensure that the chambers are level and securely anchored in place to prevent shifting or movement during operation.
Follow the manufacturer’s instructions for any additional components or accessories that need to be installed within the chambers.
2. Connecting Inlet and Outlet Pipes:
Connect the inlet pipe to the primary chamber, allowing wastewater to enter the treatment system.
Ensure that the inlet pipe is properly sealed to prevent leaks or contamination.
Connect the outlet pipe to the secondary chamber, allowing treated effluent to exit the system.
Double-check all connections to ensure they are secure and watertight.
3. Wiring the System for Power:
Begin by consulting the manufacturer’s guidelines and local electrical codes for wiring requirements.
Install a dedicated electrical circuit for the sewage treatment plant, ensuring it meets all safety standards and regulations.
Connect the system’s control panel and any other electrical components according to the manufacturer’s specifications.
Test the electrical connections to ensure they are functioning correctly before proceeding.
4. Plumbing Connections for Inlet and Outlet Pipes:
Connect the inlet pipe to the sewage treatment plant, ensuring it is securely fastened and sealed to prevent leaks.
Use appropriate plumbing fittings and materials to ensure a watertight connection.
Connect the outlet pipe from the treatment plant to the desired discharge point, whether it be a soakaway, drainage field, or other approved outlet.
Double-check all plumbing connections to ensure they are properly aligned and sealed.
Testing and Commissioning your Sewage Treatment Plant
Before putting your sewage treatment plant into full operation, it’s essential to conduct thorough testing and commissioning to ensure its proper function and performance. Here’s how to proceed:
1. Conducting Initial System Tests:
Perform a series of tests to check the various components of the sewage treatment plant, including pumps, valves, sensors, and controls.
Test the flow of wastewater through the system to ensure it is properly treated and discharged according to regulatory standards.
Verify that all electrical and plumbing connections are functioning correctly and that there are no leaks or malfunctions.
2. Adjusting Settings as Needed:
Make any necessary adjustments to the system settings based on the results of the initial tests.
Fine-tune parameters such as flow rates, aeration levels, and treatment times to optimise the performance of the sewage treatment plant.
Ensure that the system is operating efficiently and effectively, meeting all regulatory requirements for wastewater treatment.
Free Commissioning Offer:
GRAF UK offers free commissioning services to ensure that your sewage treatment plant is set up and calibrated correctly.
Our approved service providers will conduct the commissioning process, including testing and adjusting the system to ensure optimal performance.
By having your treatment system commissioned by one of our approved service providers, you activate the warranty, providing you with peace of mind and assurance of quality service.
At GRAF UK, we are committed to providing high-quality sewage treatment solutions and exceptional customer service. Our free commissioning offer ensures that your treatment plant is set up and calibrated correctly, activating the warranty and providing you with peace of mind.
If you’re ready to take the next step in implementing a sewage treatment solution or would like to learn more about our free commissioning offer, don’t hesitate to get in touch with us today. Our team of experts is here to guide you through the process and ensure that your wastewater management needs are met effectively and efficiently.