FIELD: sewage treatment.
SUBSTANCE: invention relates to a method for treatment of sewage polluted with Cr (VI) compounds, in particular, cloudburst, drainage waters and waters from industrial platforms, and can be used in plants where treatment from Cr (VI) is carried out. Method involves reduction of Cr (VI) with ferrous (II) sulfate, neutralization of acid excess and settling followed by carbonization of condensed pulp with free carbon dioxide as a component of foam gases or with bound carbon dioxide, for example, sodium hydrocarbonate and with simultaneous heating to temperature 40-95 C. Method provides elevating the rate of deposits filtration by 4.3-6.5 due to formation of good filtering deposit.
EFFECT: improved treatment method.
3 cl, 1 tbl, 3 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PROCESSING SODA-SULFATE MIXTURE | 2001 |
|
RU2188794C1 |
| METHOD OF REWORKING SLUDGE OF CHROMATE PROCESS | 2005 |
|
RU2281249C1 |
| BARIUM CHROMATE AND PROCESS FOR PRODUCTION THEREOF | 2001 |
|
RU2191747C1 |
| CHROMIUM(VI) NEUTRALIZATION AMPEROMETRIC CONTROL METHOD | 1999 |
|
RU2155331C1 |
| METHOD FOR PURIFICATION OF MULTICOMPONENT INDUSTRIAL WASTEWATER CONTAINING ZINC AND CHROMIUM | 2022 |
|
RU2792510C1 |
| PROCESS FOR PRODUCING ELECTROLYTIC CHROME | 2003 |
|
RU2247797C2 |
| PROCEDURE TO CLEAN MEASUREMENT ELECTRODE | 1999 |
|
RU2207558C2 |
| METHOD OF REMOVING ARSENIC FROM WASTE WATERS AND AQUEOUS SOLUTIONS OF ALKALI METALS | 1993 |
|
RU2100288C1 |
| METHOD OF REUSING SPENT MOTOR CAR ANTIFREEZES | 2001 |
|
RU2188212C1 |
| AMPEROMETRIC TECHNIQUE FOR DETERMINING RESIDUAL CHLORINE IN WATER | 1999 |
|
RU2163375C2 |
