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Most commonly asked questions about sewage systems

Sewage systems, also known as wastewater or sanitation systems, are essential for the proper disposal and treatment of human waste and wastewater. Here are some useful bits of information about sewage systems:

  1. Components of Sewage Systems: A typical sewage system consists of two main components: the collection system and the treatment system. The collection system includes pipes, pumps, and manholes that transport wastewater from homes, businesses, and industries to the treatment plant. The treatment system employs various processes to remove pollutants and contaminants from the wastewater before it is released back into the environment.

  2. Types of Sewage Systems: There are two primary types of sewage systems - combined sewers and separate sewers. Combined sewers carry both stormwater and wastewater in the same pipe, while separate sewers have separate pipes for stormwater and wastewater. In many modern systems, separate sewers are more common, as they help prevent overflows during heavy rainfall.

  3. Wastewater Treatment Processes: Wastewater treatment plants use multiple processes to treat sewage effectively. These processes may include preliminary treatment (screening and grit removal), primary treatment (sedimentation to remove solids), secondary treatment (biological processes to break down organic matter), and tertiary treatment (additional polishing to remove remaining contaminants).

  4. Challenges with Sewage Systems: Aging infrastructure is a significant challenge for many cities with sewage systems built decades ago. These systems require constant maintenance and repair to prevent leaks and overflows. Additionally, sewer overflows during heavy rainfall can lead to the release of untreated sewage into nearby water bodies, posing environmental and public health risks.

  5. Environmental Impact: Properly functioning sewage systems are critical for safeguarding public health and protecting the environment. Untreated wastewater can contain harmful pathogens, chemicals, and nutrients that can contaminate water bodies, negatively affecting aquatic life and potentially causing waterborne diseases.

  6. Industrial Wastewater: Industrial processes can produce highly polluted wastewater, often containing toxic chemicals. Proper treatment of industrial wastewater before discharge into the sewage system is crucial to prevent contamination of the overall wastewater stream and ensure effective treatment at the sewage treatment plant.

  7. Emerging Technologies: Advancements in technology have led to innovative approaches to sewage treatment, including decentralized wastewater treatment systems, membrane bioreactors, and anaerobic digestion. These technologies offer more efficient and environmentally friendly solutions to manage sewage.

  8. Proper Disposal: Not everything can be flushed down the toilet or poured down the sink. Items like wet wipes, diapers, grease, and hazardous chemicals should never be disposed of through the sewage system, as they can cause clogs and damage treatment equipment.

  9. Importance of Public Awareness: Public awareness about the proper use of sewage systems and the importance of water conservation is crucial. Educating the public about responsible wastewater disposal can reduce strain on sewage systems and help protect water resources.

  10. Reuse and Resource Recovery: Some advanced wastewater treatment plants are exploring the possibilities of recycling and reusing treated wastewater. Additionally, resource recovery from sewage, such as extracting energy or valuable materials, is becoming an area of interest in sustainable sewage management.

Overall, well-designed and properly maintained sewage systems play a vital role in promoting public health, protecting the environment, and ensuring the sustainable use of water resources.


If you are looking for a Sewage treatment system, contact us on 01388 537050 or check out our Sewage Treatment Systems