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Sewage Treatment Plants

We’ve chosen Harlequin HydroClear Sewage Treatment Plants due to their excellent reputation for high quality and long service life. Harlequin are one of the leading brand names for sewage treatment plants and with good reason as their warranties will suggest. Some products in this range will require up to 10 working days for delivery. Please enquire for more info. Deliveries for tanks over 2500L will be made on a 45ft vehicle. Please ensure access and offloading is available.

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More Information on Harlequin HydroClear Sewage Treatment Plants:

Producing an excellent pollutant removal level of 96.6%, the HydroClear is a great sewer treatment plant. Wastewater from your bathrooms, toilets, laundry and kitchens feeds directly into the plant. From here it travels through three treatment chambers. Once treated, wastewater is discharged through a soakaway or directly into a stream or river.

Having a very slimline profile enables the plant to be set up at easily and at low cost. There are 6 sizes in the HydroClear selection. These vary from 6 inhabitants - 50 inhabitants.

Sewage treatment plants play a significant role in society. This is one aspect that is often neglected and misunderstood by people because people don’t understand it at all. Nevertheless, sewage treatment plants have many essential functions.

Sewage can destroy the environment if it's disposed of as commercial, municipal, or domestic waste, so it ought to be treated in sewage treatment plants. The process of sewage treatment is the elimination of impurities from the wastewater both on industrial and residential waste making liquid and solid waste safe for reuse or disposal.

There’re actually different processes of sewage treatment: biological, chemical and physical processes. The level of contamination of wastewater and toxins will pinpoint which of the processes is to be employed.

Sewage treatment plants generally don’t include wastes that come from heavily pollutant sources like industrial plants, which release large doses of chemical waste products. Industrial plants have their own built-in sewage treatment plants.

Before going further into the topic, let's first understand what a sewage treatment plant is and why it’s so important:

What Exactly are Sewage Treatment Plants?

Admittedly, we generate a lot of waste on a daily basis. Some of this waste is so toxic that if it’s let out in the immediate area, it can result in water and land contamination and cause many diseases.

It’s easy to get rid of the solid waste but not as easy to get rid of biological and chemical contaminants from this waste, so that it can be disposed of safely into the surrounding areas. This is done with the help of a sewage treatment plant.

A sewage treatment plant is an amenity where contaminated water and waste is treated for making it eco-friendly. Sewage treatment can also be referred to as wastewater treatment. But the latter is a broader term, which can also refer to industrial wastewater.

In a nutshell, Wastewater is the water that has been used and released from commercial properties, industries, and domestic residences, which have high concentrations of pollutants and huge amounts of contaminants.

Different techniques are employed by different sewage treatment plants to purify polluted water and produce treated sewage (or treated effluent) that can be safely released into the environment. A by-product of sewage treatment is a slurry or semi-solid waste, commonly dubbed as sewage sludge. The sludge undergoes further treatment before being suitable for application to land or disposal.

The Workings of a Sewage Treatment Plant

Although very simple, the working of a sewage treatment plant calls for careful attention to detail and maintenance. Here we have explained the working of a sewage treatment plant:

  1. Sedimentation

The initial process entails sedimentation of solid waste so that only liquid matter floats on the top. This liquid matter is then separated from the solid waste with the help of clarification machines. The basic principle behind this process is to get rid of the solid waste and leave behind only the liquid waste for the next stage of treatment.

  1. Aeration

Sewage has very high biological oxygen demand (BOD). Consequently, the high demand is met with the help of aerators. Aerators increase oxygen content by quickly mixing the oxygen produced in aeration chambers with the waste. This sets in motion the speedy treatment of sewage.

  1. Disinfection

Dependent on the waste, there’re many processes involved in sewage treatment. But as a rule, the last process in wastewater treatment is decontamination. This process helps in decontaminating the wastewater and removing toxicity so that it becomes fit for disposal in local water reservoirs.

Sewage Treatment Benefits:

The sewage treatment process doesn’t only produce clean, reusable water but also has the potential to produce many other advantages. It can generate energy through methane capture, to decrease a country’s waste production, and produce natural fertiliser from the waste accumulated through the process. Here is a more detailed explanation of these advantages:

  1. Clean Water

Water is a renewable resource as it gets purified through rain and evaporation; however, only about three percent of the earth's water is fit to drink. Although nature gradually cleans wastewater eventually, the main advantage of wastewater treatment is maintaining clean water for reuse.

  1. New Research and Improvements

Sewage treatment processes are changing as scientists come up with new methods. This results in improvements in purification, the speed of water treatment and uses for the waste products removed. Development of new processes also saves more resources, time and energy.

  1. Disease

Sewage treatment processes can contain and remove potential illness-causing impurities through a filtering system that obstructs their path and further treatment that eliminates dangerous organisms. This keeps potential bacteria and illnesses from making their way into the ground, or other water sources, and harming animals, plants and people.

  1. Economics

Sewage treatment processing and research create job opportunities. Sewage treatment plants, for instance, require human operation and routine maintenance. Additionally, returning clean water to streams and rivers helps maintain natural areas, promoting tourism.

  1. Waste Reduction

Through sewage treatment, the amount of waste released into the environment is decreased thus improving environmental health. Thereby, the government, in turn, lowers the health risks linked to environmental pollution and cuts on water loss induced through water pollution. Sewage treatment also reduces the amount of money invested by a country on environmental rehabilitation projects needed to battle pollution.

  1. Energy Production

The sludge accumulated during the sewage treatment process is treated since it has a lot of biodegradable material. It ‘s treated with anaerobic bacteria in digesters heated to thirty-five degrees, an environment where these anaerobic bacteria grow well without any oxygen. The gas emitted during this anaerobic process has a lot of methane, which is harvested and then used to generate electricity.

This energy can be used to power up the sewage treatment plants making them self-sustainable, and if excess energy is produced, it could be transported into a country’s national grid. This helps reduce the over dependence on non-renewable energy sources, reducing a country’s carbon footprint.

  1. Fertiliser Production

Any decomposable material remaining is dried and is then turned into natural fertiliser. The resultant natural fertiliser is then used in the agricultural sector, boosting crop yields. This cuts down on the use of harmful chemical fertilisers that contaminate the surface and marine ecosystems.

Maintenance of Sewage Treatment Plants

The first golden rule of keeping your plant in good condition is to use energy-efficient and sturdy machinery. Some of the important pieces of machinery like aerators and clarifiers come in various types and at varying amounts.

However, it’s advisable to use standard-quality machines; low-quality clarifiers and aerators can cause complications such as improper deposition of the solid sludge; accumulation of filaments and biological matter in aeration tanks, and high utilisation of energy.

5 Common Sewage Treatment Plant Questions

Here are five frequently asked questions that you might want to find out right away to give you a better understanding of the issue of a sewage treatment plant:

  1. What is the difference between sewage treatment plants and septic tanks?

A septic tank is a system that allows for effluent to flow out and settle on drainage fields and the solid waste is retained in the tank until emptying is required. With a treatment plant, the wastewater is treated with different chemicals and produces much cleaner effluent, which is better for the environment.

  1. Do sewage treatment plants smell?

After all, you're going to be living right beside one, so it's important to know what to expect. The truth is that if there is a primary settlement tank installed, then you might get some smells emanating from this area. This is more common with septic tanks, however, and if a treatment plant integrates an aeration process, then there is the likelihood that you won't get any smells being detected.

  1. Do you need a license or approval to have a treatment plant connected?

Every sewage plant is has to be registered by the Environment Agency. They then either need a permit or will apply for an exemption, depending on environmental factors, like nearby streams, waterways, etc. The Environmental Agency will notify you either way, if you’re exempt from needing a permit, or if you will need to apply for one.

  1. How far away from my property should the plant be?

It’s stated in environmental building regulations that the treatment plant needs to be between 7 and 10 meters away from your property. There will be environmental officers who will make the ultimate decision; however, this is the usual distance that is allowed for.

  1. When will the plant need to be emptied?

A lot will depend on the usage and type of sewage treatment plant, but anywhere from every six months, up to three years for some installations. An average figure would be to have it emptied once a year.


In conclusion, the combination of these advantages together with water production makes sewage treatment a sustainable long and short-term solution to the world’s water crisis, which will only increase as the world population increases.

It’s estimated that the world’s population is set to increase to nine billion people, and this would cause an increase in the amount of water that can be treated. This will cause the production of large amounts of fresh, usable water, thus helping battle water scarcity.

Sewage treatment plants from EasyMerchant Limited ensure cities deal effectively with domestic wastewater, helping them improve sanitation in cities and towns while minimising harmful environmental impact caused by improper discharge.

EasyMerchant Limited sewage treatment plant solutions:

  • Get rid of harmful pathogens,

  • Clear harmful toxins, detergents and chemicals,

  • Separate and extract useful substances.

How the HydroClear's MBBR System Works:

The MBBR is an innovative treatment procedure using thousands of carriers created to create an surface area for bio film development. MBBR features the advantages of fixed film media processes without suffering their common downfalls. Overgrowth of bacteria resulting in'channelling' is an issue with common procedure designs such as submerged aerated filters (SAF), rotating biological contactors (RBC) or trickling filter (TF) layouts . Bio media is self cleaning due to motions brought on by air bubbles coming in the underside. Within the main settlement chamber, large solids are removed by settlement and flotation. An accumulation forms at the bottom of the tank and is eliminated by desludging.

Where it is treated to remove the dissolved constituents the water then passes to the biological reactor. Mobile media components support big populations inside the reaction chamber while forced air promotes complete blending ensuring that treatment is achieved. The treated effluent and sloughed off bacteria flows to the final settlement chamber where any little solids are removed before the clarified effluent being discharged by the plant.

How to Install HydroClear Sewage Treatment Plants:

Finding your sewer treatment plant - treatment plant to get a single family ought to be sited 15m. Agreement and approval should be sought from your local authority.

Although the HydroClear is, please also consider the prevailing wind direction when choosing your site. Installations serving more than 1 building ought to be located at least 25m from habitable buildings. Some regional authorities may enable HydroClears to be set up somewhat closer, but approved and this has to be assessed locally. Do not situate your treatment plant near a driveway, roadway or any place else that poses a risk of lots that are superimposed and remember - good access has to be accessible for your tanker to empty the own plant. Make sure to check levels and the fall of the drain correctly.

HyrdoClear Sewage Treatment Plant Installation Instructions

How will it be Delivered?

Deliveries will be made by lorry and it's the customers responsibility to ensure adequate and safe access plus off loading. Fork lift or similar lifting equipment should makes off loading of heavy objects.

If there is any doubt about shipping access or off loading please contact us.