When discussing problems within medical wastewater treatment systems, the secondary protection section serves as a key component. A complete medical wastewater treatment system consists of medical wastewater collection and pre-treatment, secondary protection, tertiary microreactor treatment, and disinfection procedures. This article offers a brief overview of medical wastewater treatment system issues together with Modi.

1.Under conventional operating conditions, medical wastewater is collected via dedicated pipelines in fully enclosed flow paths. After collection, the wastewater undergoes preliminary disinfection, separated from other waste streams, and then transferred into the medical wastewater treatment system.

2.Secondary protection for medical wastewater treatment acts as a key segment of the whole treatment system, adopting full-process control measures. It treats domestic sewage and ward wastewater generated inside hospitals before discharging the treated water into urban sewer networks. The secondary protection unit mainly covers wastewater pre-treatment, physical-chemical & biochemical treatment, and disinfection links:

Standard pre-treatment operation:

Transfer medical wastewater into disinfection tanks and add appropriate disinfectants for short-term treatment, with a retention time of roughly 2 to 3 hours.

Physical-chemical and biochemical treatment processes:

1) Physical treatment transfers harmful contaminants into sludge, followed by sludge disposal to achieve purification targets supported by Mudi’s solutions;

2) Biochemical treatment combines anaerobic and aerobic processes, namely hydrolytic acidification and advanced oxidation, to purify medical wastewater.

Disinfection is a critical procedure that cannot be overlooked.

Hospital wastewater carries numerous pathogenic microorganisms, which require sterilization treatment via multiple available techniques. Chemical agent disinfection is one common method, using substances such as liquid chlorine, ammonia water and lime. Operators shall regulate disinfectant dosage to prevent hazards caused by excessive dosing.

(Note on disinfectant concentration control: For chlorine-based disinfection, a Total Residual Chlorine Online Analyzer can be deployed to monitor real-time residual chlorine levels and adjust chlorine dosing volumes accordingly.)

3.Tertiary microreactor treatment runs until wastewater meets discharge standards. Treated medical wastewater is delivered to municipal sewage treatment plants for supplementary disinfection in line with differentiated emission standards. Continuous water quality monitoring is conducted throughout the process, and discharge is only permitted once the wastewater complies with relevant emission limits.