TREATMENT METHOD FOR WASTE WATER FROM PHENOL PRODUCTION

PURPOSE: To provide a method to stably treat waste water from phenol production by reducing substances inhibiting activity of activated sludge and preventing the activity of the sludge from lowering at the time of activated sludge treatment for waste water from phenol production. CONSTITUTION: Waste...

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Bibliographische Detailangaben
Hauptverfasser:	TOMINAGA KOZO, KONO HARUKI, HARADA YASUO, AKIMARU YUKIO
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY ORGANIC CHEMISTRY TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:	PURPOSE: To provide a method to stably treat waste water from phenol production by reducing substances inhibiting activity of activated sludge and preventing the activity of the sludge from lowering at the time of activated sludge treatment for waste water from phenol production. CONSTITUTION: Waste water from phenol production, which is waste water discharged out at the time of producing phenols and containing tar basic groups and other organic substances besides phenols, is treated by activated sludge treatment. In that case, after an acid is added to the waste water from phenol production to adjust pH to be 4-5, the waste water is cleaned by utilizing light oil in which tar basic group concentration is kept to be 1000-10000ppm to lower the concentration of oil-soluble organic compounds and then the resulting waste waster is treated by activated sludge treatment. Consequently, without employing any special way, basic groups in the waste water which have strongly inhibiting function against the activated sludge can easily be removed. Moreover waste water from phenol production with stable basic group concentration can be supplied and thus stable operation of the activated sludge treatment can be expected.