What are the hazards of not cleaning the septic tank for a long time?
According to incomplete statistics, about 80% of the septic tanks are not cleaned regularly! This is what we learned from the sanitation department. Environmental sanitation experts warn that if the septic tank is left uncleaned for a long time, it will cause the slag to harden, and the septic tank will be useless. In addition, in the case of a high degree of sealing of the septic tank, if the biogas overflows, it may even cause a biogas explosion. The septic tank is like a "sewage treatment plant". Experts from the Institute of Environmental Sanitation pointed out that under normal circumstances, after the fecal sewage stays in the septic tank for 12 to 24 hours, it can remove 60% to 70% of suspended solids and 80% of animal and vegetable oils. ~ 90% and aerobic pathogens, bacteria, roundworm eggs 90 ~ 95%. If the existing septic tanks can be dredged by rainwater pipes normally, the total amount of pollutants removed is equivalent to the processing capacity of a sewage treatment plant with a daily processing capacity of 100,000 tons. Irregular cleaning of septic tanks may cause explosions Long-term lack of cleaning of septic tanks can cause great harm. It is reported that the current septic tanks are mainly traditional three-stage septic tanks, whose function is to sediment and retain feces. Generally, it takes 30 days of anaerobic fermentation to reduce the volume of feces, and then reduce the concentration of sewage into the domestic sewage discharge pipe network. However, when the bottom of the septic tank is hardened due to the sedimentation of the fecal residue, the space and time left for the fermentation of the fecal water are insufficient, which directly affects the effect of the harmless treatment. When the solidification of the fecal residue reaches a certain height, the feces are equivalent to being discharged directly into the septic tank without any treatment. At this time, the septic tank has already existed in name only, and it has become a "passing septic tank" without any septic effect. In addition, if the septic tank is highly sealed, if the biogas overflows, it may cause a biogas explosion. The cleaning interval should not exceed one year. Environmental sanitation experts call for avoiding the direct discharge of fecal water into municipal canals, and should guide the establishment of a professional fecal removal and transportation company to be responsible for the regular cleaning of social septic tanks within the service area. The Environmental Sanitation Bureau requested to strengthen the cleaning and management of social septic tanks. The septic tank must formulate a septic tank cleaning plan according to the regulations, and the cleaning interval should not exceed one year. Due to the small volume of the old septic tank, the cleaning interval should be shortened accordingly.
