"What is the first stage of wastewater treatment?"

"The first stage of wastewater treatment is the mechanical treatment stage, also known as mechanical pre-treatment or mechanical wastewater treatment. Here, mechanical processes are applied to remove pollutants from the wastewater. The following machines, plants and structures are used in these mechanical processes:\r\n \tScreens for the separation of organic and inorganic larger solids \tGrit chambers for the separation of grit and mineral substances \tSedimentation tanks, so-called primary clarifiers, for the separation of finer solid wastewater components or, alternatively, special screening machines replacing the primary clarifier, such as the HUBER Drum Screen LIQUID. "

Mechanical Preliminary Treatment

Q: "Why is mechanical pre-treatment of wastewater important?"

"Wastewater to be treated in a municipal wastewater treatment plant contains a variety of substances, which may be present in dissolved or undissolved form. The undissolved substances, i.e. the solids, can be organic or inorganic. The size of the solids also varies greatly, as wastewater not only contains small solids such as sand, but can also contain solids very large in size.\r\nEverything that can enter a sewer system will eventually end up at the sewage treatment plant. The mechanical treatment stage therefore has the task, as the first stage of wastewater treatment, to remove these solids, as they would interfere with or hinder the second stage of wastewater treatment, the biological stage."

Q: "What is the cleaning capacity of mechanical pre-treatment?"

"Mechanical wastewater treatment can remove about 30% of the pollutants in wastewater. At first, screens remove mainly larger solids such as plastic parts, hygiene articles, stones, etc. The subsequent grit chamber separates grit, which is always present in municipal wastewater. The primary clarifier, either in the form of a primary settlement tank or a mechanical screening system, then separates finer solid organic and also inorganic wastewater pollutants."

Removal of foreign matter from raw wastewater and sludge

Good mechanical pre-treatment protects the subsequent process stages from clogging, blockages, deposits and abrasion.

Solutions for mechanical preliminary wastewater treatment

Good mechanical pre-treatment protects the subsequent process stages from clogging, blockages, deposits and abrasion.

Solids Separation with HUBER Screens and Fine Screens

Solids Separation with Screens and Fine Screens

The separation of solids from wastewater with screens is the first step in municipal and industrial wastewater treatment. HUBER has developed a wide range of different screens, fine and ultra-fine screening plants which are in use thousands of times worldwide.

Screenings Treatment

Wash presses are the optimum solution for the treatment of screenings. By adding washing water and mechanical energy, faeces and suspendable organic matter are washed out and dewatered. Weight reduction also decreases screenings disposal costs.

Grit and Fat Removal

For reasons of the operational safety of wastewater treatment plants, it is necessary to remove the grit contained in the wastewater. HUBER offers different types of grit traps for this purpose, which can separate grit, fine grit as well as grease.

Treatment of Grit from Sewage Treatment Plants

Grit washing has become an established process for the treatment of grit from grit chambers over the last decades. HUBER grit washing plants have been in operation worldwide for more than 25 years and have set the standard for modern and efficient processing of grit from wastewater treatment plants to produce a valuable product for reuse.

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Replacement for Primary Settling Tanks

The HUBER CarbonWin® process replaces the primary clarifier with a fine screen. With the same separation efficiency, only 10% of the area is required compared to a primary settlement tank.

Removal of foreign, disturbing materials and solids from wastewater

Mechanical preliminary treatment is a prerequisite for reliable, low-wear and low-maintenance operation of the entire wastewater treatment plant.

With mechanical wastewater treatment, foreign matter and solids in the wastewater are removed by screens and fine screening systems as well as through sedimentation and separation processes.

The removed materials such as screenings, grit or primary sludge are fed to subsequent treatment stages.

As experts with decades of worldwide experience, we have the optimal solution for every mechanical pre-treatment task:

FAQ

Frequently Asked Questions

The first stage of wastewater treatment is the mechanical treatment stage, also known as mechanical pre-treatment or mechanical wastewater treatment. Here, mechanical processes are applied to remove pollutants from the wastewater. The following machines, plants and structures are used in these mechanical processes:

Screens for the separation of organic and inorganic larger solids
Grit chambers for the separation of grit and mineral substances
Sedimentation tanks, so-called primary clarifiers, for the separation of finer solid wastewater components or, alternatively, special screening machines replacing the primary clarifier, such as the HUBER Drum Screen LIQUID.

Wastewater to be treated in a municipal wastewater treatment plant contains a variety of substances, which may be present in dissolved or undissolved form. The undissolved substances, i.e. the solids, can be organic or inorganic. The size of the solids also varies greatly, as wastewater not only contains small solids such as sand, but can also contain solids very large in size.

Everything that can enter a sewer system will eventually end up at the sewage treatment plant. The mechanical treatment stage therefore has the task, as the first stage of wastewater treatment, to remove these solids, as they would interfere with or hinder the second stage of wastewater treatment, the biological stage.

Mechanical wastewater treatment can remove about 30% of the pollutants in wastewater. At first, screens remove mainly larger solids such as plastic parts, hygiene articles, stones, etc. The subsequent grit chamber separates grit, which is always present in municipal wastewater. The primary clarifier, either in the form of a primary settlement tank or a mechanical screening system, then separates finer solid organic and also inorganic wastewater pollutants.