The treatment of domestic sewage has always been the focus of public attention. We need to analyze the characteristics of domestic sewage to customize more suitable domestic sewage treatment equipment!
1. Characteristics of domestic sewage
More than 90% of urban sewage is water, and the rest is solid matter. The following pollutants are commonly found in water:
(1) Suspended solids: generally 200~500 mg/L, sometimes more than 1000 mg/L. Among them, the inorganic and colloidal particles are easy to adsorb organic poisons, heavy metals, pesticides, and pathogenic bacteria, forming complex pollutants with great harm.
(2) Pathogens: including germs, parasites, and viruses. Common bacteria are intestinal infectious bacteria, which can reach several million per liter of sewage, which can spread diseases such as cholera, typhoid, gastroenteritis, infant diarrhea, and dysentery.
(3) Aerobic organic matter: including carbohydrates, proteins, oils, amino acids, fatty acids, esters, etc.
(4) Plant nutrients: domestic sewage, food industry wastewater, and urban ground runoff sewage all contain plant nutrients—nitrogen and phosphorus. They can cause eutrophication of surface water bodies, sea red tides and groundwater fertilization.

2. Process characteristics of domestic sewage treatment equipment
(1) It can adapt to changes in water quality and quantity, and has good shock load resistance;
(2) The pre-aeration in the adjustment tank can reduce the concentration of organic matter in the sewage, prevent the pollutants from corrupting and odor, and greatly improve the surrounding environment;
(3) The sludge pre-reflow nitrification process is adopted, which greatly reduces the sludge output;
(4) Using a new type of filler, the film is fast, the service life is long, and the treatment effect is fast;
(5) Fully consider the possibility of secondary pollution and minimize its impact;
(6) Centralized control, automatic operation, easy management and maintenance, improve the effectiveness and stability of the system.

Holy Shield provides systematic solutions for enterprises' pollution problems with professional solution design, sophisticated equipment processing capabilities and thoughtful after-sales service.