Analyze the reasons for substandard effluent from domestic sewage treatment equipment

Domestic wastewater originates from a wide range of sources, resulting in a diverse array of pollutants. These pollutants may include not only chemical substances but also radioactive wastewater and pathogens. Therefore, proper treatment is essential, and the treated water must meet quality standards before discharge. However, substandard effluent from wastewater treatment facilities remains a significant environmental hazard. The reasons for this are analyzed below. Domestic wastewater treatment equipment What exactly causes substandard effluent from domestic wastewater treatment equipment? The analysis is as follows.

　　1. To reduce costs, the chemicals used for categorized wastewater treatment are highly targeted. This leads to effective treatment of each category of wastewater, but the overall water quality still fails to meet standards.

　　2. Large quantities of lime are used to clarify the water and reduce costs. This, however, produces a large amount of sludge, often accounting for 30%-40% of wastewater treatment costs.

　　3. Influent PH value fluctuates greatly, resulting in unstable PH reaction tank control. PH This instability causes turbidity in the sedimentation tank. The effluent quality also becomes unstable, fluctuating between good and bad.

4. Wastewater treatment personnel lack a strong sense of responsibility and are not meticulous in their operations. For example, they fail to promptly shut down the equipment for emergency treatment when there is a problem with the influent. Various instruments and probes are not regularly calibrated and cleaned. The concentration of chemicals is not prepared according to process requirements; for convenience, the concentration is privately increased.

　　5. Before surface treatment, products in the surface treatment industry undergo extensive pretreatment. The degreasing powder used in this process contains emulsifiers. Large amounts of emulsifiers not only affect COD levels but also affect the flocculation of flocs in the sedimentation tank, resulting in poor sludge formation. This leads to poor sedimentation, with a large amount of suspended matter flowing out of the sedimentation tank with the upper clear water. During PH recirculation, it redissolves into the water, resulting in exceeding heavy metal ion standards at the discharge point.

　 　The above are the reasons for substandard effluent from domestic wastewater treatment equipment. Such wastewater must not be discharged arbitrarily; it must undergo secondary treatment and testing before discharge. Otherwise, the consequences are unimaginable and unbearable. This also requires staff to strengthen their sense of responsibility and enhance their professional knowledge to improve the situation.