Integrated graywater treating method and system

Abstract

The invention belongs to the technical field of environmental protection treatment, and particularly relates to an integrated graywater treating method and a system. The integrated graywater treating method comprises the steps of collection and regulation, biological oxidation treatment and solid-liquid separation, continuous flowing sand filtering advanced treatment and disinfection. In the invention, the living graywater with lower sewage concentration, such as waste water from showering and washing, waste water from kitchen and the like, is collected and reused for low-quality water-needing fields of toilet flushing, greening and the like in situ after being thoroughly purified, thus achieving the purposes of realizing recycling of water resources in a certain region, decreasing emission load of pollutants, and the like. The invention is characterize by compact process structure, small occupied area, convenient operation, simple management, low capital construction and running expenses, and the like.

Description

technical field

[0001] The invention belongs to the technical field of water treatment, and in particular relates to an integrated gray water treatment method and system. Background technique

[0002] Domestic sewage is composed of gray water and black water, gray water is composed of shower waste water, washing waste water, and kitchen sewage, and black water is composed of defecation and toilet flushing water. From the perspective of the types and quantities of pollutants, gray water accounts for 70-75% of all domestic sewage, but the total amount of pollutants only accounts for about 20% of domestic sewage, mainly detergents, suspended solids and a small amount of organic pollutants , The concentration of nitrogen and phosphorus is 85% and 80% lower than that of ordinary domestic sewage; nitrogen and phosphorus in black water account for 80-90% of the total domestic sewage, and are the most important source of pollutants. The traditional domestic sewage collection and tr...

Examples

Embodiment

[0059] Use this method to treat all shower, washing and kitchen miscellaneous gray water in a building, and the NH in the water 3 -N is 20~35mg / L, COD Cr 200~350mg / l, TP 3~8mg / L, SS 140~300mg / L, LAS 8~25mg / L, the effluent after treatment can reach NH 3 -N lower than 5mg / L, COD Cr 40mg / L, TN less than 20mg / L, SS less than 5mg / L, LAS less than 0.8mg / L, turbidity less than 1.0NTU, total bacterial count less than 10 2 individual / mL, E.coli was not detected. The reused water is directly used for flushing toilets in buildings, greening and car washing, etc.

[0060] The domestic gray water, low-concentration domestic sewage, and industrial waste water of the living quarters can meet the relevant national reuse standards after being purified by the present invention.

technical field

[0001] The invention belongs to the technical field of water treatment, and in particular relates to an integrated gray water treatment method and system. Background technique

[0002] Domestic sewage is composed of gray water and black water, gray water is composed of shower waste water, washing waste water, and kitchen sewage, and black water is composed of defecation and toilet flushing water. From the perspective of the types and quantities of pollutants, gray water accounts for 70-75% of all domestic sewage, but the total amount of pollutants only accounts for about 20% of domestic sewage, mainly detergents, suspended solids and a small amount of organic pollutants , The concentration of nitrogen and phosphorus is 85% and 80% lower than that of ordinary domestic sewage; nitrogen and phosphorus in black water account for 80-90% of the total domestic sewage, and are the most important source of pollutants. The traditional domestic sewage collection and tr...

Examples

Embodiment

[0059] Use this method to treat all shower, washing and kitchen miscellaneous gray water in a building, and the NH in the water 3 -N is 20~35mg / L, COD Cr 200~350mg / l, TP 3~8mg / L, SS 140~300mg / L, LAS 8~25mg / L, the effluent after treatment can reach NH 3 -N lower than 5mg / L, COD Cr 40mg / L, TN less than 20mg / L, SS less than 5mg / L, LAS less than 0.8mg / L, turbidity less than 1.0NTU, total bacterial count less than 10 2 individual / mL, E.coli was not detected. The reused water is directly used for flushing toilets in buildings, greening and car washing, etc.

[0060] The domestic gray water, low-concentration domestic sewage, and industrial waste water of the living quarters can meet the relevant national reuse standards after being purified by the present invention.

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