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1. 发明专利

JPS52117279A DEHYDRATION OF SLUDGE 失效
公开(公告)号：JPS52117279A
公开(公告)日：1977-10-01
申请号：JP3459776
申请日：1976-03-29
申请人： KURITA INDUSTRIAL CO LTD
发明人： MORI HAJIME , SUGIMOTO MORISHIGE , ISHII YASUHIKO
IPC分类号： C02F11/12 , B01D21/02 , C02F11/14
摘要： PURPOSE:To improve the exfoliation property of dehydrated cake and to decrease the water content, moreover to increase the filtration velocity, by adding a high moelcular coagulator to the sludge so as to from the flock and dehydrating it after making flock diameter less than 3 mm with stirring.

2. 发明专利

JPS55142593A PREVENTING METHOD FOR SCUM GENERATION 失效
公开(公告)号：JPS55142593A
公开(公告)日：1980-11-07
申请号：JP5217979
申请日：1979-04-26
申请人： KURITA INDUSTRIAL CO LTD
发明人： YASUKAWA KATSUO , MORI HAJIME
IPC分类号： C02F3/12
摘要： PURPOSE:To prevent the scum generation in a precipitation tank by adding a pH adjusting agent to a waste water after treated by activated sludge. CONSTITUTION:In a stage wherein water to the treated is subjected to the activated sludge treatment and separated into a solid and a liquid component in a precipitation tank, by adding a pH adjusting agent to a mixed liquid flowed into a precipitation tank, the scum generation is prevented. As a pH adjusting agent, hydrogen chloride, sulfuric acid, citric acid, sodium hydroxide, incinerator ash or the like are used. Therefore, the deterioration of water quality by scum is prevented and a mechanical means for removing scum can be eliminated.

3. 发明专利

JPS5551494A SEWAGE TREATMENT 失效
公开(公告)号：JPS5551494A
公开(公告)日：1980-04-15
申请号：JP12477378
申请日：1978-10-11
申请人： KURITA INDUSTRIAL CO LTD
发明人： MORI HAJIME , HIYAKUTABA YOSHIO , NOGUCHI YOSHIHIRO
IPC分类号： C02F1/56 , C02F3/12
摘要： PURPOSE:To prevent suspended solids from flowing into treated water when water flow significantly increases, polyethyleneimine or alkylene dihalide-alkylenepolyamine polycondensate is added in the aeration tank or the flow route from the aeration tank to the sedimentation tank. CONSTITUTION:Into the aeration tank or into the mixed solution flow route from the aeration tank to the sedimentation tank, polyethyleneimine or alkylene dihalide- alkylenepolyamine polycondensate is added in an amount of 5-50ppm (for sewage in residence group). This type of additive has a proper molecular weight of 30000- 600000 and is dense because of cationic property to form flocks which is easy to settle down. As a result, flocks quickly settle down in the final sedimentation basin, and suspended solids (SS) are prevented from being flowed into treated water. If excessively added, flock expansion does not occur to enable stable treatment, thus controlling SS flow in response to the increased rate of water flow.

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