Compresstech Resources, Inc.

Wastewater Treatment Technology: A Comprehensive Guide on Aeration Blowers

Wastewater Treatment Technology: A Comprehensive Guide on Aeration Blowers


Wastewater treatment is a critical safeguard for our water sources, especially in the Philippines, where water quality is paramount. At the heart of such processes, a vital component is the aeration blower. This essential machine plays a pivotal role in preserving water quality, directly impacting both environmental integrity and public health.

Contaminated water poses significant threats to ecosystems and human well-being alike. From industrial discharge to domestic sewage, untreated wastewater introduces pollutants and pathogens that can harm aquatic life, disrupt ecosystems, and compromise drinking water safety. Neglecting proper wastewater treatment can have several consequences, affecting not only humans but also the delicate balance of nature.

In this guide, we focus on the role of aeration blowers for wastewater treatment in the Philippines. As providers of these industrial machines, our team at Compresstech Resources, Inc. is dedicated to helping you understand how they work as well as their importance.

What Is Wastewater Treatment? 

Wastewater treatment is the process of removing impurities from wastewater or sewage before it enters aquifers or natural bodies of water like rivers, lakes, estuaries, and oceans. Essentially, it aims to purify water to a safe level for various uses, such as drinking, swimming, or fishing. Water quality depends on the type and concentration of impurities present, with pollution primarily stemming from human activities.

Sources of water pollution are diverse, primarily originating from the following:

  • Point Sources – Pollutants originating from a single, identifiable source, such as sewage discharge pipes or industrial outfall pipes.
  • Dispersed Sources – These are impurities that enter bodies of water from broad, unconfined areas like surface runoff from farms or urban stormwater drainage.

Why Is Wastewater Treatment Essential?

Treating wastewater with aeration blowers is vital for preserving environmental and human health. Here are the two main reasons why such processes are essential in safeguarding ecosystems, preventing the spread of waterborne diseases, and ensuring the sustainability of water resources:

Environmental Impact 

The world’s population generates a substantial amount of wastewater or sewage. Without proper treatment, this wastewater contains harmful chemicals that can cause diseases not only in humans but also in flora, fish, and wildlife. Wastewater treatment is crucial in removing contaminants and suspended solids from wastewater, ensuring that the treated water can be safely reintroduced into the ecosystem, free from man-made pollutants.

Excessive nitrogen, phosphates, and organic matter in water bodies can lead to overgrowth of plants and algae, resulting in oxygen depletion and the creation of “dead zones” in aquatic ecosystems. Moreover, untreated wastewater contaminates the food chain, posing a threat to non-aquatic animals, including humans, through bioaccumulation of pollutants. Wastewater pollution can also trigger phenomena like red tide, which can render large volumes of water non-potable and lead to mass mortality of aquatic organisms.

Effect on Human Health 

Wastewater treatment is essential for safeguarding human health and preventing the spread of waterborne diseases. Untreated wastewater can harbor pathogens and contaminants that pose serious health risks to human populations. In developing nations, untreated sewage is responsible for an estimated 1.7 million deaths annually, with over 90% of these deaths happening in developing countries.

Globally, more than 80% of wastewater is discharged without treatment, leading to mass illness and severe food chain disruption, particularly in developing nations. Untreated sewage can cause various diseases, such as campylobacteriosis, cryptosporidiosis, and gastroenteritis.

How Is Wastewater Treatment Done? 

Wastewater treatment is a multistep process designed to remove impurities and contaminants from sewage before it is discharged into the environment. Here’s an overview of the critical steps involved in wastewater treatment:

Screening and Grit Removal 

As sewage enters the treatment plant, it passes through a screen to remove large floating objects like rags and sticks that could clog pipes. Afterward, the sewage enters a grit chamber where cinders, sand, and small stones settle at the bottom.

Primary Treatment 

Once the screening and grit removal are done, the sewage will still contain organic and inorganic matter along with suspended solids. This is why it undergoes primary treatment in a sedimentation tank where the flow rate is reduced, allowing suspended solids to settle at the bottom, forming raw primary biosolids (formerly known as sludge). Biosolids are then typically removed from the tanks for further treatment or disposal.

Secondary Treatment 

Secondary treatment aims to remove about 85% of the organic matter in sewage using bacteria. Two principal techniques used in secondary treatment are the trickling filter and the activated sludge process.

In the trickling filter process, sewage passes through a bed of stones or synthetic media where bacteria consume organic matter. On the other hand, in the activated sludge process, sewage is mixed with air and sludge laden with bacteria in an aeration tank, speeding up the breakdown of organic matter. Once these are done, effluent is disinfected with chlorine before being discharged into receiving waters to kill pathogenic bacteria and reduce odor.

Advanced Treatment 

Rising pollution challenges and the need for water reuse have led to the development of advanced treatment methods. Techniques such as biological treatment, physical-chemical separation, filtration, carbon adsorption, distillation, and reverse osmosis are used to achieve higher levels of pollution control. These processes can produce purified wastewater suitable for various purposes, including industrial, agricultural, recreational, or even drinking water supplies.

Choosing the Right Blower for Wastewater Treatment Plants 

The Best Industrial Blowers for Wastewater Treatment Plants

Selecting the proper equipment is crucial for optimizing the efficiency and performance of wastewater treatment plants. Different types of blowers offer unique advantages and are suitable for varying flow rates, operating conditions, and budget considerations.

Here are the different blower options for wastewater treatment in the Philippines:

Centrifugal Blowers 

Ideal for medium to large flows, centrifugal blowers operate using vane-style impellers and typically run at a constant speed. Their airflow can also be adjusted by throttling the inlet valve, allowing for flexibility in system operation. These machines can achieve peak efficiency when operating within their designed range. While they are robust machines requiring minimal space, specific controls are necessary to prevent surging.

Positive Displacement Blowers 

Positive displacement blowers, including hybrid blowers (screw blowers) and rotary lobe blowers, are commonly used for small to medium flows in wastewater treatment plants. Rotary lobe blowers utilize straight or twisted lobe rotors for air compression, while hybrid blowers incorporate low-pressure screw rotors. These machines are known for their reliable performance and turndown capabilities, making them suitable for applications with fluctuating flow rates.

High-Speed Turbo Blowers 

Due to their direct connection between the turbo impeller and shaft, high-speed turbo blowers offer exceptional efficiency and eliminate transmission losses. These machines are best suited for applications with narrow swings in turndown, as they perform most efficiently at or near their design point. They are also compact, require minimal space, and can deliver energy savings in applications with low variation in operating conditions.

FAQs About Aeration Blowers for Wastewater Treatment in the Philippines 

What Are the Types of Aeration Systems? 

There are three main types of aeration systems, namely:

  • Packed-Tower Aerator – This system utilizes towers filled with packing material, allowing contaminants to transfer to the air. It effectively eliminates volatile contaminants but may require space and incur higher energy costs.
  • Diffused-Bubble Aerator – This popular system creates tiny bubbles through diffusers, efficiently treating wastewater with flexible designs and low maintenance. However, it can be costly and less efficient in shallow tanks.
  • Spray Aerator – Ideal for volatile contaminant removal, spray aerators produce fine mist to treat water. While simple and effective, they may lack efficiency for high-volume wastewater treatment and require regular cleaning in certain conditions.

What Are the Benefits of Aeration? 

Aerated water offers a multitude of advantages. Firstly, it enhances the oxygen levels crucial for supporting aquatic life, including fish, bacteria, and plants. This increased oxygenation also aids in controlling and reducing the growth of algae and aquatic weeds by promoting circulation and fostering nutrient-competitive bacteria.

Additionally, aerated water boosts the population of beneficial bacteria, which are essential in nutrient removal and overall water quality maintenance. Lastly, aeration prevents water stratification, ensuring consistent oxygen levels throughout the water column and mitigating the risk of fish kills.

What Are the Other Applications of Blowers? 

Aeration blowers for wastewater treatment in the Philippines have other applications, including the following:

  • Air Handling – Used for even airflow distribution in buildings
  • Dust Loading – Collects and removes airborne particles to improve air quality and comply with regulations
  • Fume Extraction – Removes fumes and chemicals from industrial processes for worker safety
  • Material Handling – Moves granular and powder materials in various industries
  • Saturated Air Management – Removes moisture from saturated air to prevent equipment damage
  • Exhausting – Eliminates fumes and vapors from enclosed spaces to maintain air cleanliness and prevent hazards


Wastewater treatment is a crucial process in safeguarding our environment and public health. With the ever-increasing challenges posed by water pollution, having the needed equipment to accomplish such processes is even more integral. Aeration blowers are essential in this regard, facilitating the removal of impurities and ensuring wastewater purification to meet quality standards.

Choosing the right aeration blowers can significantly impact the efficiency and effectiveness of wastewater treatment plants. By selecting the appropriate blower technology and maintaining it diligently, wastewater treatment facilities can achieve optimal performance and mitigate environmental risks.

As a trusted aeration blower supplier in the Philippines, Compresstech Resources, Inc. stands ready to provide cutting-edge solutions for wastewater treatment plants. Get in touch with us today for more information about how we can help you. Together, let’s make a positive impact on our water resources and communities.