Sewage

The tidal discharge of hospital outpatient sewage leads to frequent on-off of chlorine dioxide disinfection system, posing efficiency, equipment and safety hazards. Relying on five layers of protection to ensure operational safety, cooperating with operation and maintenance measures such as phased operation, encrypted maintenance, and optimized drug supply, adjusting start and stop times reasonably, improving sewage disinfection efficiency, and building a solid public health defense line.

Xiuba chlorine dioxide can be used for advanced treatment of polluted water source. The front end pre oxidizes the odorant, iron and manganese, and the dosage is determined by test; The terminal disinfection shall comply with the requirements of the national standard to ensure the contact time and water margin. The product covers a variety of dosage forms and supporting equipment, which should be selected according to the national standard. Double dosing points are set, and the equipment is equipped with metering, monitoring and alarm functions to control the total dosage, monitor disinfection by-products, and ensure the water quality treatment effect by relying on detection test and whole process monitoring.

Regarding the control of hydrochloric acid and sodium chlorate raw materials for chlorine dioxide generators in hospital wastewater treatment, the quality requirements of raw materials are clearly defined in accordance with national standards such as GB28931-2024. On-site rapid acceptance can be carried out through visual inspection, odor identification, specific gravity and pH testing, and small-scale reaction. By implementing management measures such as raw material registration and sampling, separate storage, regular equipment cleaning, and monitoring of operating parameters, the disinfection effect can be stabilized, and cost reduction and efficiency improvement can be achieved.

Hospital wastewater is prone to producing byproducts and residual resistant pathogens when disinfected alone. A chlorine dioxide-ozone-ultraviolet coupling process can be used for deep treatment. Chlorine dioxide is the main disinfection unit, ozone degrades recalcitrant pollutants, and ultraviolet light is used for final control. With the help of online monitoring, the reagents and energy consumption can be intelligently adjusted to balance treatment effect and cost. In the future, it will develop towards big data AI automatic control.

Sodium thiosulfate and other reducing substances in hospital wastewater may rapidly consume chlorine dioxide, leading to insufficient residual chlorine and reduced disinfection intensity in some areas. Solving this type of "disinfection gap" problem cannot rely solely on increasing the dosage. Instead, it requires a comprehensive disinfection assurance system built through measures such as source identification, homogenization adjustment, optimized mixing, rational dosage, upgraded monitoring, and supplementary disinfection.

Chlorine dioxide kills bacteria through multi-target oxidation, and theoretically, it is unlikely to produce drug-resistant bacteria. However, long-term sublethal low-dose disinfection of wastewater systems can screen out resistant microorganisms, leading to bacterial succession. In such cases, it may be necessary to increase CT disinfection parameters to achieve the desired disinfection effect. The risk of increased microbial tolerance and the effectiveness of hospital wastewater disinfection can be mitigated by ensuring sufficient dosage and contact time, avoiding prolonged low-dose operation, combining UV/ozone disinfection, proper wastewater pretreatment, and regular monitoring of water quality microorganisms.

When chlorine dioxide is used to disinfect hospital wastewater, short-circuiting and disinfection dead zones can easily occur due to the short half-life of the agent. A three-stage mixing process, consisting of pipeline premixing, inlet enhanced mixing, and in-tank flow guidance, combined with an online intelligent control system and standardized equipment selection and daily operation and maintenance, can be used to achieve rapid and uniform distribution of chlorine dioxide in wastewater and ensure the disinfection effect of hospital wastewater.

When hospital wastewater is disinfected with chlorine dioxide, pH directly affects the disinfection effect. The pH needs to be maintained within the range of 6.0–8.5. Water quality is controlled through monitoring, intelligent dosing, and coordinated regulation of upstream processes to ensure stable discharge compliance and save operating costs.

Excessive ammonia nitrogen in hospital wastewater stems from four main issues: pretreatment, biochemical processes, water volume, and process technology. This article provides a complete solution encompassing pretreatment, biochemical optimization, advanced treatment, and emergency nitrogen reduction, balancing stable compliance with operating costs, and simultaneously promoting solutions from chlorine dioxide disinfectant manufacturers.

Abnormalities in hospital wastewater biochemical systems can lead to elevated COD and ammonia nitrogen levels, excessive consumption of chlorine dioxide causing disinfection failure, and posing a risk of pathogen leakage. This article introduces six emergency response measures and a corresponding long-term management plan to ensure wastewater meets discharge standards and safeguard public health and environmental safety.