Stages inside a hospital sewage treatment plant
Hospitals are among the places in greatest need of water treatment units. In this article, we have mentioned the importance of providing hospital water treatment solutions for all applications. Here we list the treatment stages inside the hospital sewage treatment plant. This field has derived its importance due to the special nature of hospital wastewater that differs from other types of wastewater.
The plant used for sewage treatment in hospitals
The station is a type of station specially designed for hospitals. It is equipped with a disinfection system specifically intended for wastewater coming from infectious disease departments. operating rooms, intensive care units, and dialysis wards.
The plant performs mechanical treatment and final chemical disinfection of wastewater without producing infectious sludge and harmful compounds thanks to the use of peracetic acid as a disinfectant (sodium hypochlorite or chlorine dioxide can also be used). The plant is fully automatic and does not require constant supervision. Staff only need to run checks at preset times and refill the sanitizer tank.
Stages inside a sewage treatment plant
Stage 1: Pre-treatment tank
The first stage of treatment takes place in a tank equipped with a digital sensor system to control the internal flow rate of the plant. The pre-treatment tank is very important in order to reach the correct homogeneity of the water and the correct buffer size.
Stage 2: Solid-Liquid Separation
During this stage, the liquid passes through mechanical filters, where the solids are compressed. The liquid is filtered through stainless steel with holes of 5 mm in diameter with constant curvature and fixed on special supports. The perforated plate is then cleaned continuously by four nylon brushes mounted on rotating arms. Solids are pressed against the perforated surface by four rubber rollers, which are fixed on special elements, to ensure uniform pressure. The sludge reaches sufficient dryness and is discharged by two adjustable nylon brushes. The liquid is collected at the bottom of the separator of the tank and from there it is transferred to the purge tank by open impulse pumps. The separated solids are collected in a designated container which can then be processed through a sterilizer.
Stage 3: disinfection of infected fluids and draining them into the sewers
The purge tank is designed to achieve the right mix of wastewater and disinfectants. We control the process to add the necessary dose of chemicals based on the reading of the specific chemical and physical information. The peracetic acid, which is mainly used as a disinfectant, creates an acidic environment in the disinfection tank. The contact time between disinfectant agents and wastewater is usually given between 20-30 minutes to ensure disinfection. It depends on the type of disinfectant used, after which the sewage is ready to be drained.
Chemicals used
Peracetic acid, also called peroxyacetic acid. It is an organic compound with CH3CO3H, An organic peroxide is a colorless, odorless liquid. Somewhat similar to acetic acid, and is highly corrosive. Peracetic acid is weaker than the original acetic acid. The US Environmental Protection Agency first registered peracetic acid as an antimicrobial in 1985. As one of its indoor uses on hard surfaces. We use it in agricultural buildings, food establishments, medical facilities, home bathrooms. We use it to disinfect medical equipment, to prevent biofilm formation in some industries, and as a disinfectant in water purification.
You can contact Carewater to learn more about building and designing stations according to the needs of your facility. from here.
