Sludge treatment membrane apparatus

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5651889
SERIAL NO

08621237

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A membrane apparatus includes a bubble supplying portion for supplying micro bubbles which is provided at a location in the vicinity of the entrance of a flow passage for raw liquid. Thus, the growth of a gel layer on a membrane surface can be prevented, and a large filtering amount can be maintained while preventing sludge from blocking the membrane. Moreover, since bubbles uniformly pass through the inter-membrane passages, sludge blocking can be evenly prevented over the entire surface of the membrane. When a flat membrane is used as the filtering membrane, there is provided an advantage of reducing the frequency of work for disassembling the frame and cleaning the membranes. A membrane treatment apparatus includes the membrane apparatus, an aeration apparatus, a circulating tank, and a filtrate pump. Since the relative density of raw liquid which has received bubbles in the membrane apparatus decreases, a difference in density is produced between that raw liquid and raw liquid which is newly supplied from the circulating tank to the passage and which contain no bubbles. Since this difference in density causes a flow of raw liquid, no power is needed for circulation. Accordingly, a circulating pump can be omitted so as to reduce costs including initial cost and operation cost.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
MITSUI CHEMICALS, INC.TOKYO1460

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hashimoto, Tadaaki Sakura, JP 4 16
Irie, Kouji Ichikawa, JP 3 27
Shirage, Hirokazu Chofu, JP 1 13
Wataya, Sakae Urayasu, JP 1 13
Yamamoto, Kimio Ichihara, JP 3 32

Cited Art Landscape

Patent Info (Count) # Cites Year
 
BRITISH NUCLEAR FUELS PLC (1)
* 4832841 Liquid treatment apparatus 11 1987
 
KUBOTA CORPORATION (3)
* 5192456 Apparatus for treating activated sludge and method of cleaning it 120 1992
* 5437787 Adsorption/reaction equipment 3 1993
* 5482625 Filtration membrane module 58 1994
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
Minnesota Mining and Manufacturing Company (1)
* 6514412 Microstructured separation device 27 1998
 
3M INNOVATIVE PROPERTIES COMPANY (4)
6986428 Fluid separation membrane module 30 2003
* 2004/0226,886 Fluid separation membrane module 8 2003
7279215 Membrane modules and integrated membrane cassettes 40 2003
* 2005/0123,727 Membrane modules and integrated membrane cassettes 6 2003
 
CH2M HILL, INC. (7)
* 6517723 Method and apparatus for treating wastewater using membrane filters 62 2000
6863818 Method and apparatus for treating wastewater using membrane filters 64 2003
6946073 Method for treating wastewater in a membrane bioreactor to produce a low phosphorus effluent 57 2003
* 2005/0045,557 Method for treating wastewater in a membrane bioreactor to produce a low phosphorus effluent 33 2003
8721887 Method and system for treating wastewater 0 2010
8105490 Low phosphorus water treatment systems 0 2011
* 2011/0192,776 LOW PHOSPHORUS WATER TREATMENT SYSTEMS 0 2011
 
CHIYODA KOHAN CO., LTD. (1)
* 6197203 Filtration method and filtration apparatus 6 1999
 
BAYER INTELLECTUAL PROPERTY GMBH (1)
* 2008/0277,330 Device and Method For Thermally Drying Filter Cakes in Diaphragm-Filter Presses 2 2006
 
ALFA LAVAL INC., A NEW JERSEY CORPORATION (2)
7279100 Methods and apparatus for treating wastewater employing a high rate clarifier and a membrane 40 2005
7410584 Methods and apparatus for treating wastewater employing a high rate clarifier and a membrane 34 2007
 
OVIVO LUXEMBOURG S.A.R.L. (1)
8308939 Efficient arrangement of membrane bioreactors 0 2009
 
MITSUI CHEMICALS, INC. (1)
* 6224766 Membrane treatment method and membrane treatment apparatus 3 1999
 
PANASONIC HEALTHCARE HOLDINGS CO., LTD. (1)
* 2006/0175,206 Biosensor, measuring instrument for biosensor, and method of quantifying substrate 11 2006
 
HANS HUBER AG MASCHINEN-UND ANLAGENBAU (1)
* 2007/0170,106 Installation and method for the treatment of sewage sludge, and membrane unit 0 2005
* Cited By Examiner