FIELD: chemistry.
SUBSTANCE: invention relates to a method of treating waste water and can be used at small and large-scale treatment facilities of domestic sewage and industrial sewage with similar composition. Waste water is clarified in a primary settling tank 1. The effluent being cleaned is fed into a denitrifier 2, and then passes through an aerobic zone 3 and a nitrifier 4. The sludge mixture is separated in a secondary settling tank 5. Nitrified active sludge is returned to the denitrifier 2 through an outer duct. The recycle rate of active sludge in the outer duct is equal to 130-160% and stays in the secondary settling tank for not less than 15 minutes. The biologically treated waste water is taken for post-treatment.
EFFECT: invention increases the degree of removing nitrogen compounds from waste water to the maximum allowable concentration.
1 tbl, 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR DEEP COMPLEX TREATMENT OF INDUSTRIAL AND SURFACE WASTEWATER HIGHLY CONCENTRATED IN TERMS OF MINERAL NITROGEN AND PHOSPHORUS FORMS WITH A LOW CONTENT OF ORGANIC SUBSTANCES | 2022 |
|
RU2794086C1 |
| METHOD OF PHOSPHORUS REMOVAL FROM THE LIQUID EFFLUENTS | 2017 |
|
RU2654969C1 |
| BLOCK OF BIOLOGICAL WASTEWATER TREATMENT (OPTIONS) AND SECONDARY SUMP USED IN THIS UNIT (OPTIONS) | 2022 |
|
RU2790712C1 |
| BIOLOGICAL WASTE WATER TREATMENT PLANT | 2014 |
|
RU2572329C2 |
| METHOD OF PROVIDING RELIABLE PURIFICATION OF WASTE WATER FROM NITROGEN AND PHOSPHORUS COMPOUNDS | 2010 |
|
RU2440306C1 |
| METHOD OF SEWAGE TREATMENT | 2001 |
|
RU2201404C2 |
| METHOD OF THROUGH BIOLOGICAL CLEANING OF SEWAGE FROM NITROGEN OF AMMONIUM SALTS | 2000 |
|
RU2185338C2 |
| BIOREACTOR FOR WASTEWATER TREATMENT | 2023 |
|
RU2812426C1 |
| METHOD OF REMOVAL OF PHOSPHOR FROM THE SEWAGE LIQUOR | 2004 |
|
RU2276108C2 |
| METHOD FOR DEEP BIOLOGICAL TREATMENT OF WASTE WATER | 2021 |
|
RU2767110C1 |
