A wastewater treatment plant typically uses these three ways to treat wastewater: primary, secondary, and tertiary, which use physical, biological, and chemical processes, respectively.
The biological treatment procedure is essential in breaking down the organic waste material, produced by households and various industries. Aerobic biological treatment and anaerobic biological treatment of effluent are the two basic methods, of biological wastewater treatment. Let’s talk about the aerobic biological reactors in the treatment of effluent.
How to treat Effluent with Aerobic Biological Reactors?
The wastewater is treated biologically during the secondary stage of treatment, after the suspended solid waste has been removed physically during the primary stage of treatment.
Numerous naturally occurring microorganisms aid in the breakdown of toxins and chemicals, found in wastewater. The requirement for oxygen in the aerobic method distinguishes it from anaerobic biological treatment of effluent.
Thus, the system is continuously supplied with oxygen via mechanical aeration devices, which enables aerobic bacteria consume organic matter, by maintaining dissolved oxygen levels of about 2-3 ppm.
Optimum factors of aerobic wastewater treatment
Different methods would be needed to maintain the biomass growth for optimum levels of microbial performance, depending on the various wastewater properties, such as dissolved oxygen, pH, temperature, and nutrients.
Additionally, adequate aeration is necessary to maintain dissolved oxygen levels, so that bacteria may always treat wastewater properly.
Applications of aerobic biological treatment of wastewater
When there is a high volume of organic or biodegradable waste created, such as in the food and beverage, chemical, oil and gas industries, aerobic biological treatment is frequently utilized.
Additionally, it is commonly employed in businesses and municipal wastewater treatment facilities. The primary goal is to effectively treat wastewater so that it complies with established standards, and may be released into the environment without risk.
Types of biological aerobic treatment systems
In wastewater treatment plants, many aerobic biological treatment techniques are employed.
· Standard Activated Sludge Process
The most common aerobic biological treatment method used in aerobic reactors, is the traditional activated sludge procedure. Since its origin, it has undergone an enormous number of improvements and is frequently used to treat industrial effluents.
This procedure makes use of an aerobic reactor, which is essentially a stirred tank seeded with some microbe-containing recycled activated sludge. Due to the huge volume of an aerobic reactor, air compressors are employed to introduce enough oxygen into the system, to allow bacteria to have dissolved oxygen to carry out their job.
Aeration tanks with biofilm carriers inside are a crucial part of Moving Bed Biofilm Reactors, or MBBRs. Aeration devices are used to suspend the plastic biofilm carriers, which come in a variety of sizes and forms, inside the aerobic reactor.
It makes it possible to treat wastewater with a high BOD in a more compact space. Furthermore, there is no sludge recycling.
Advanced aerobic biological treatment systems known as membrane bioreactors, are known to incorporate elements of membrane filtration and the activated sludge process. Without using the standard sedimentation process, it aids in the separation and recycling of suspended materials. By focusing on BOD, MBRs produce high-quality effluent. Although, there are substantial up-front and on-going expenses, efficiency is unmatched.
Advanced microbial strains have come to light as a possible way to improve the efficiency, of the aerobic wastewater treatment process employing aerobic reactors.
One such cutting-edge approach is our advanced ETPs. These improve the efficiency of the treatment facility by reducing the volume of sludge, controlling foul odour, and assisting in the decomposition of organic substances found in the wastewater.
Want to know more about the treatment of effluent with aerobic biological reactors!
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