FIELD: chemical industry. SUBSTANCE: method comprises stages of biochemical nitrification and denitrification to adjust pH at not lower than 6.5-7.0 in nitrification stage. The desired pH is adjusted in nitrification stage by introducing desired amount of nitrate and/or nitrite compounds into sewage. Nitrate and/or nitrite compounds are added as aqueous solutions. Method makes it possible to obtain high degree of sewage purification to remove ammonium nitrogen without using alkali agents. EFFECT: more efficient purification method. 2 cl, 2 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF BIOLOGICALLY TREATING HIGH-CONCENTRATION WASTE WATERS | 1997 |
|
RU2121461C1 |
| METHOD OF PURIFYING WASTE WATER FROM AMMONIA | 0 |
|
SU710978A1 |
| CIRCULATING WATER SUPPLY SYSTEM OF COKE AND BYPRODUCT PROCESS | 1993 |
|
RU2049740C1 |
| 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 REMOVING NITROGEN FROM SEWAGE FLUID | 2009 |
|
RU2402494C2 |
| SYSTEM FOR BIOCHEMICAL PURIFICATION OF SEWAGE WATERS FROM ORGANIC AND NITROGEN-CONTAINING COMPOUNDS AND WATER RETURN FOR WATER SUPPLY OF ENTERPRISE | 1999 |
|
RU2162824C1 |
| METHOD OF REUSABLE WATER SUPPLY IN BY-PRODUCT COKE INDUSTRY | 1991 |
|
RU2027682C1 |
| DEVICE FOR BIOCHEMICAL TREATMENT OF SEWAGE AND REMOVAL OF NITROGEN COMPOUNDS | 1992 |
|
RU2051134C1 |
| METHOD OF PURIFYING WASTE WATER FROM AMMONIA | 0 |
|
SU937345A1 |
| BLOCK OF BIOLOGICAL WASTEWATER TREATMENT (OPTIONS) AND SECONDARY SUMP USED IN THIS UNIT (OPTIONS) | 2022 |
|
RU2790712C1 |
