EPA Cevre - Biological Wastewater Treatment System
Biological Wastewater Treatment Systems are a process that enables the removal of organic matter in wastewater by breaking it down through microorganisms. These microorganisms use elements such as carbon, nitrogen and phosphorus in the waste as a food source and convert them into simpler, stable components. In this way, the wastewater is purified and freed from substances that are harmful to the environment.
Essentially, biological treatment processes fall into two main categories:
- Aerobic Treatment: This process occurs in an oxygenated environment. Microorganisms use organic matter in the waste as an energy source while consuming oxygen for respiration. The end products are usually carbon dioxide, water, and biomass (sludge). Activated sludge systems, trickling filters, and biological discs are examples of this method.
- Anaerobic Treatment: This process occurs in an oxygen-free environment. Microorganisms can use compounds such as nitrate and sulphate instead of oxygen to break down organic matter, or they can ferment directly. This process produces gases such as methane and carbon dioxide. Anaerobic reactors are frequently used in the treatment of industrial wastewater containing high concentrations of organic waste. This method also enables energy recovery through biogas production.
Biological Wastewater Treatment Systems are used in a wide range of applications, from domestic wastewater treatment plants to various industrial facilities such as food industry, paper and textile factories.
The main benefits of these systems are as follows:
- Environmentally Friendly: Minimises environmental damage by reducing chemical usage.
- Economical: Long-term operating costs are lower than chemical treatment.
- Energy Recovery: Anaerobic systems offer the opportunity to generate energy by producing methane gas (biogas) from waste.
- Efficiency: Ensures the high-efficiency removal of organic pollutants.
Biological Wastewater Treatment Systems are an integral part of wastewater management and sustainability efforts