Fine Bubble Diffusers

World Technologies offers several Diffusers Technologies based on application which includes Fine Bubble Diffusers, Course bubble diffusers and HD Disc Diffusion systems for wastewater aeration using compressed air. From membrane diffusers made of plastic to those made of stainless steel, all the products in this section can be organised into systems or networks, designed and made entirely by World Technologies.

Fine & Coarse Bubble Diffusers:

In waste water treatment process, aeration is introduced into the liquid with the help of blowers and diffusers, where the diffusers remain submerged in the waste water, providing an aerobic environment for microbial degradation of organic matter.

HD Disc Diffusers

We offer several type of diffusers which includes HD disc diffuser series combines cost effective design, low installation and maintenance costs, reliability and performance in intermittent and continuous aeration process

The Purpose of Aeration is Twofold

To supply the required oxygen to the metabolizing microorganisms.

To provide mixing so that the microbes come into intimate contact with the dissolved and suspended organic matter.

Specifications

The two most common aeration systems are subsurface and mechanical. In a subsurface system, air is introduced by diffusers or other devices submerged in the wastewater. A mechanical system agitates the wastewater by various means (e.g., propellers, blades, or brushes) to introduce air from the atmosphere.

Generally submerged bubble aeration provides more effective result than surface aeration. In the primary and secondary treatment of wastewater, it is common to use aeration as a method of removing organic matter. Submerged bubble aeration works effectively by diffusing small air bubbles to mix with the wastewater and facilitate the work of aerobic bacteria in breaking down organic waste. However, there are two different types of bubble diffusers: fine bubble and coarse bubble diffusers. Though fine bubble diffusers and coarse bubble diffusers both work through bubble aeration but there are few distinguishing features of their design and function. Both diffusers come in different diameters and sizes depending on the requirement of aeration required.

Fine bubble diffusers produce a smaller-diameter bubble for the aeration process. These bubbles typically measure 1 to 3 mm in diameter. This fine bubble aeration usually provides 2% or more Standard Oxygen Transfer Efficiency (SOTE) during aeration. Coarse air bubble diffusers, produce a larger diameter of bubble to displace and mix the wastewater effectively. Coarse bubble aeration typically provides 1% or less Standard Oxygen Transfer Efficiency (SOTE) during aeration. The main principle behind using fine bubble diffusers versus coarse bubble diffusers is that smaller bubbles result in more bubble surface area per unit volume and greater oxygen transfer exchange. Fine bubble aerators provide enhanced aeration and efficiency, while coarse bubble aerators excel at mixing and increasing the level of dissolved oxygen. Fine bubble diffusers increase the treatment efficiency and oxygen transfer, thus helps in reducing the power cost as well. Activated sludge aeration tanks are the largest applications for diffused aeration system. Air diffusion equipments are considered to be the heart of activated sludge process and are suppose to be the largest energy users with plant operations.

HD Disc Diffusers Advantages

Different types of perforations according to the operating conditions
Precise die cut openings for high oxygen transfer efficiency and low head loss
Active diameter from 184 MM to 218 MM over 295 MM
Various standard and special membrane materials: EPDM, Silicone, PUR, NBR and FKM

Glass fiber reinforced plastics for maximum chemical and thermal resistance
Non-return valve (optionally)
Various connections for plastic and steel tubes due to comprehensive range of accessories
Tube Diffusers

Strip Diffusers

The strip diffuser is designed to work with a high flow rate of blown air, in conditions where traditional disc and tubular diffusers cannot operate normally. By using strip diffusers, it is therefore possible to cover the same surface with a smaller number of units.

Another strongpoint of the strip diffuser is constituted by its modular structure, which allows for strips of different lengths to be assembled. The special supports allow for direct installation at the bottom of the tank without the need for intermediary support structures.

Tube Diffusers

Tube diffusers are manufactured in several lengths of different unit air capacity. They are preferably organised into preassembled self-supporting units, easy to transport and install. These systems are based on square-section tubes in stainless steel, which perform at the same time the function of feeding the diffusers and the function of support. The number of diffusers and the dimensions of each system can be customised upon request.

The micro-perforated membrane combines high efficiency in the transfer of oxygen and low head loss. The most commonly used material for the membranes is EPDM rubber. Membranes made from alternative materials are, however, available upon request for applications in particularly aggressive wastewater.The special supports allow for direct installation at the bottom of the tank without the need for intermediary support structures.

Coarse Bubble Diffusers

A perfect solution for applications that do not require a remarkable oxygen transfer but rather a mixing action. These diffusers are entirely made of stainless steel and can be considered a perfect solution for applications that do not require a remarkable oxygen transfer but rather a mixing action.

Coarse bubble diffusers are successfully utilized in sand and oil separation processes; their particular open non-clogging structure and the building materials they consist of ensure resistance to corrosion and long life. As the tube diffusers, coarse bubble diffusers can be arranged as preassembled self-supporting structures, that can be easily transported and installed.