BATCH WASTEWATER TREATMENT METHOD

• Main Authors: KATSUTA NAOKO, SUEHIRO BUNICHI
• Format: Patent
• Language: English
• Published: 29.01.2009
• Subjects: 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; 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

PROBLEM TO BE SOLVED: To reduce equipment cost and promote practical use in a small-scale plant. SOLUTION: While wastewater D is introduced into a tank 2 accommodating aerobic granules G, it is aerated. The wastewater D is left to stand still after aeration so that the aerobic granules G precipitate, and after being left to stand still, treated water W is discharged. Such a cycle is repeated. The introduction of the wastewater D into the tank 2 even during aeration time increases continuous treatment time and decreases time when the continuous treatment cannot be carried out, by the aeration time in comparison with the conventional method, which enables nearly continuous treatment as a whole, thereby greatly miniaturizing a storage tank for storing the wastewater D temporarily at the upstream side of the tank 2. COPYRIGHT: (C)2009,JPO&INPIT