Restoration of the Ability to Settle Bulking Sludge by Bacterial Seeding in Wastewater Treatment
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概要
- 論文の詳細を見る
An attempt to restore the settling ability of denatured bulking sludge was undertaken by changing the microflora in waste treatment tanks. A cell suspension of mixed cultures of ten strains of bacteria, which were isolated from normal activated sludge from night soil plants, and a type culture Zoogloea ramigera IAM1236 was seeded into a laboratory-scale aeration tank containing bulking sludge collected from municipal night soil or a food processing (bean curd production) waste treatment plant. The tank was fed with synthetic wastewater or industrial waste and aerated for 22 days. After 5 days, the microflora in the sludge changed remarkably with the seeding of the bacterial culture; filamentous organisms disappeared and active protozoa (Vorticella sp., Epistylis sp., and Lecane sp.) appeared. The sludge became compact and settled rapidly. The SV_<30> of the sludge temporarily increased, but in the end decreased from 97 to 20%. The CODcr value decreased from 30 to 20 ppm. In the tank without seeding, the sludge contained almost filamentous organisms only which floated and finally decomposed. The effects were confirmed by applied tests in 700-ton scale and 100-ton scale aeration tanks of municipal night soil and a food processing waste treatment plant, respectively.
- 社団法人日本生物工学会の論文
- 1987-06-25
著者
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KIYOHARA Hohzoh
Department of Applied Chemistry, Faculty of Engineering, Okayama University of Science
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TAKIZAWA NOBORU
Biotechnology Laboratory, Department of Applied Chemistry, Faculty of Engineering, Okayama Universit
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KIYOHARA HOHZOH
Biotechnology Laboratory, Department of Applied Chemistry, Faculty of Engineering, Okayama Universit
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Takizawa N
Department Of Applied Chemistry Faculty Of Engineering Okayama University Of Science
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Takizawa Noboru
Department Of Pediatrics Kanazawa University School Of Medicine
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Takizawa Noboru
Biotechnology Laboratory Department Of Applied Chemistry Faculty Of Engineering Okayama University O
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Kiyohara H
Department Of Applied Chemistry Faculty Of Engineering Okayama University Of Science
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Kiyohara Hohzoh
Biotechnology Laboratory Department Of Applied Chemistry Faculty Of Engineering Okayama University O
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NOZAWA IKUKO
(Present address) Shinyaku Kaihatsu Kenkyujo Co., Ltd.
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Nozawa Ikuko
(present Address) Shinyaku Kaihatsu Kenkyujo Co. Ltd.
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