The role of cell hydrophobicity in the formation of aerobic granules

被引：115

作者：

Liu, Y ^{[1
]}

Yang, SF ^{[1
]}

Liu, QS ^{[1
]}

Tay, JH ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Civil & Environm Engn, Environm Engn Res Ctr, Singapore 639798, Singapore

来源：

CURRENT MICROBIOLOGY | 2003年 / 46卷 / 04期

关键词：

D O I：

10.1007/s00284-002-3878-3

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

Cell hydrophobicity is an important affinity force in cell self-immobilization and attachment processes. The role of cell hydrophobicity in the formation of aerobic granules has. not been clear. Therefore, two series of experiments were conducted to investigate the role of cell hydrophobicity in the formation of aerobic heterotrophic and nitrifying granules in sequencing batch reactors, while the effects of shear strength, hydraulic selection pressure, and organic loading rate on the cell hydrophobicity were also studied. Results showed that the formations of heterotrophic and nitrifying granules were associated very closely with the cell hydrophobicity. The hydrophobicity of granular sludge was nearly twofold higher than that of conventional bioflocs. A high shear force or hydraulic selection pressure imposed on microorganisms resulted in a significant increase in the cell hydrophobicity, while the cell hydrophobicity seemed not to be sensitive to the changes in the organic loading rates in the range studied. In conclusion, the cell hydrophobicity could induce and further strengthen cell-cell interaction, and might be a main triggering force to initiate the granulation of heterotrophic and nitrifying bacteria.

引用

页码：270 / 274

页数：5

共 21 条

[1]

ALPHENAAR PA, 1993, BIORESOURCE TECHNOL, V43, P249, DOI 10.1016/0960-8524(93)90038-D

[2] Characterisation by image analysis of anaerobic sludge under shock conditions [J].

Alves, M ;

Cavaleiro, AJ ;

Ferreira, EC ;

Amaral, AL ;

Mota, M ;

da Motta, M ;

Vivier, H ;

Pons, MN .

WATER SCIENCE AND TECHNOLOGY, 2000, 41 (12) :207-214

[3]

[Anonymous], 1995, STANDARD METHODS EXA, V19th

[4] Aerobic granulation in a sequencing batch reactor [J].

Beun, JJ ;

Hendriks, A ;

Van Loosdrecht, MCM ;

Morgenroth, E ;

Wilderer, PA ;

Heijnen, JJ .

WATER RESEARCH, 1999, 33 (10) :2283-2290

[5] Triggers for microbial aggregation in activated sludge? [J].

Bossier, P ;

Verstraete, W .

APPLIED MICROBIOLOGY AND BIOTECHNOLOGY, 1996, 45 (1-2) :1-6

[6] Cellular envelopes and tolerance to acid pH in Mesorhizobium loti [J].

Correa, OS ;

Rivas, EA ;

Barneix, AJ .

CURRENT MICROBIOLOGY, 1999, 38 (06) :329-334

[7]

DANNIELS L, 1994, METHODS GEN MOL BACT, P512

[8] Adhesion, autoaggregation and hydrophobicity of 13 strains of Bifidobacterium longum [J].

Del Re, B ;

Sgorbati, B ;

Miglioli, M ;

Palenzona, D .

LETTERS IN APPLIED MICROBIOLOGY, 2000, 31 (06) :438-442

[9] THE TRANSIENT PHASE BETWEEN GROWTH AND NONGROWTH OF HETEROTROPHIC BACTERIA, WITH EMPHASIS ON THE MARINE-ENVIRONMENT [J].

KJELLEBERG, S ;

HERMANSSON, M ;

MARDEN, P .

ANNUAL REVIEW OF MICROBIOLOGY, 1987, 41 :25-49

[10]

Kwok WK, 1998, BIOTECHNOL BIOENG, V58, P400

← 1 2 3 →