Technology

Dissolved air flotation

Flotation is the most effective method of removing contaminants such as fats, suspensions, oil-derived substances and other undissolved substances found in industrial wastewater. The separation of these contaminants takes place in chemical processes using coagulants and flocculants (polymers). After separation, separation takes place using a water-air mixture in the flotation chamber. The resulting sludge is discharged outside the system and possibly dewatered before being disposed of, e.g. in a biogas plant.

Technology

Sequential Biological Reactor SBR

The sequential biological reactor (SBR) is a wastewater treatment system that operates in cycles consisting of several stages. The process begins with filling the reactor with wastewater. This is followed by an aeration phase, in which oxygen is supplied to microorganisms so that they can break down organic pollutants. The next stage is sedimentation, during which clean water is separated from the biological sludge. This is followed by a phase of draining the purified water from the reactor. In the last phase, the reactor is prepared for the next cycle by removing excess sludge. This cycle repeats, allowing continuous wastewater treatment. The SBR is characterized by operational flexibility, which allows the process to be adapted to changing conditions and wastewater loads.

Technology

Sludge dewatering

Dewatering of sludge generated during the treatment of industrial wastewater is a key process aimed at reducing the volume of sludge and improving its properties for further processing or disposal. This process involves removing as much water as possible from sludge, which is achieved using various methods, such as centrifuges, filter presses or vacuum dewatering. The main goal of dewatering is to reduce the mass and volume of sludge, which translates into lower transport and storage costs. Dewatered sludge also has better mechanical properties, which facilitates its further processing, such as composting, incineration or biogas production. Additionally, reducing the water content in sludge minimizes the risk of leaks and environmental pollution. The dewatering process can also increase the efficiency of further treatment stages, for example by improving the conditions for anaerobic digestion. Thanks to sludge dewatering, the process of treating industrial wastewater becomes more economical and environmentally friendly.

Technology

Equalization

Wastewater in industrial plants is generated in many places and in many processes. As a result, its quantity and composition fluctuate significantly during the day and sometimes many days. Adjusting the treatment process to rapidly changing wastewater would be inefficient and uneconomical. Therefore, in industrial installations we use equalization tanks of appropriate size and equipment. We select the size based on data from the plant, industry knowledge and our own experience. The equipment of equalization tanks may include pumps, mixers, aeration systems, neutralization systems, by-passes and additional interceptor tanks and many other elements carefully selected to meet the requirements of individual cases.

Technology

Neutralization

Ensuring the appropriate pH value in sewage is very important for two reasons. Firstly, each receiver (sewage system, environment) requires that the sewage directed to it has a pH within a predetermined range. Secondly, the sewage pretreatment and purification processes themselves require ensuring their appropriate pH. Emi offers a wide range of solutions, from simple systems with one measurement and dosing of one neutralizing agent to complex, multi-stage systems requiring the use of specific neutralizing agents. pH correction can take place at many levels, stages and in one of two modes: flow (online) or batch.