A zero-discharge sewage treatment system for toilet excrement and urine treatment

Abstract

The invention provides a zero-drainage sewage treatment system for excrement wastewater treatment. The zero-drainage sewage treatment system can adopt an integrated container type device according todifferent application occasions and application purposes, and can also adopt a splitting type treatment unit combination; the zero-drainage sewage treatment system comprises a feces and urine separating unit, a negative pressure flushing unit, a yellow water treatment unit and a black water treatment unit; the feces and urine separating unit comprises a feces and urine squatting pan; the negativepressure flushing unit comprises a vacuum pump and a negative pressure collecting tank; the yellow water treatment unit comprises an ultrafiltration film separating unit; the black water treatment device comprises an anaerobic MBR (membrane bioreactor) unit. The zero-drainage sewage treatment system has the advantages that the use characteristic of the traditional water-flushing type toilet is furthest remained; the change of the toilet use habit of people is not needed, and the traditional toilet can be favorably upgraded and modified; by arranging the feces and urine separating system, the water flushing amount and pollution discharge amount of the toilet are greatly reduced; the design unit is flexible, and the circulating water is selected to flush the toilet according to the actual condition of the toilet field.

Description

technical field [0001] The invention belongs to the field of environmental protection, and relates to a zero-discharge sewage treatment system for toilet excrement and urine treatment. The system includes an excrement and urine separation system, a negative pressure flushing system, a yellow water treatment system, and a black water treatment system. The core comprehensive harmless recycling system is especially suitable for decentralized sewage treatment systems in residential areas, schools, hospitals, public toilets, hotels, tourist attractions and buildings, and can highlight its advantages in water-deficient areas. Background technique [0002] At present, there are mainly four types of toilets used in China, dry toilets, flush toilets, packaged toilets and waterless ecological toilets. Among them, dry toilets are mainly used in rural areas, towns and some parts of cities in my country. Although the toilets are less dependent on water resources, they are prone to mosqui...

AI Technical Summary

Problems solved by technology

Waterless ecological toilets use microbial degradation to treat human waste on the spot, which is in line with ecological principles, but the toilet opening of this type of toilet is exposed and the visual effect is poor

At the same time, there is still urine and other sewage to be discharged, and sewer pipes still need to be installed

Flush toilets are mainly used in cities, and are also the traditional sanitation system promoted today. This kind of toilet usually relies heavily on water resources, and the daily operation and maintenance costs are high.

Traditional flush toilets flush with feces and urine, resulting in a large amount of feces and sewage, which pollutes the environment

Roughly estimated, each person goes to the toilet at least 4-10 times a day, because 2 L-4 L of clean water will be used for each flushing, which will be a huge source of pollution for a long time, and also cause a huge waste of water resources

In addition, the mixed flushing of feces and urine increases the difficulty of fecal sewage treatment, making the sewage treatment efficiency low and high cost, and makes it difficult to recover nutrients such as nitrogen and phosphorus in fecal sewage, and the recovery rate is low, which eventually leads to many cities. Eutrophication of water body

Moreover, the differences in economic materials and municipal infrastructure in different regions lead to large differences in the number and processing capacity of feces treatment facilities among different types of cities

For example, a small number of fast-growing coastal cities imitated the combined treatment of feces and sewage in Europe and the United States, and are close to the level of the United States in the early 1980s; very few large cities are developing along the model of Japanese feces treatment plants, that is, to establish separate collection and treatment of feces system, but the development and level are still at a low level

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