Inner Mongolia school domestic sewage treatment reuse and organic solid resource utilization project
The total number of teachers and students in the school is about 2,500. The wastewater mainly comes from toilet flushing, bathing, laundry and canteen water. The average daily sewage volume is nearly 400 cubic meters, of which flushing water accounts for about 35%, and the site flushing and greening water is about water. 10% of the amount; organic solid waste mainly comes from manure, kitchen waste and food waste, totaling about 1500 kg / day. The system produces 200 tons of water per day, 150 cubic meters of biogas, 0.75 tons of solid biogas, 1 ton of liquid biogas, medium water for flushing and campus greening, biogas for canteen drinking energy, and biogas for green fertilization. The system produces 200 tons of recycled water per day, 150m3 of biogas per day (the calorific value is equivalent to 100 cubic meters of natural gas), and the daily garbage removal fee is 400 yuan/day.
The service life of the main equipment of the system is more than 30 years. The water system is fully automatic, no need for special operation. Only the part-time electrician of the school can add mechanical oil every month. Therefore, there is almost no labor cost, and the school can save water fees every day. The fuel cost is about 1,500 yuan.
Project construction and operation
Biogas and water reuse
Biogas is used in school cafeteria for energy