Flocculation and dewaterability of chemically enhanced primary treatment sludge by bioaugmentation with filamentous fungi

Kumarasamy Murugesan; Ammaiyappan Selvam; Jonathan W C WONG

doi:10.1016/j.biortech.2014.04.063

Flocculation and dewaterability of chemically enhanced primary treatment sludge by bioaugmentation with filamentous fungi

Kumarasamy Murugesan, Ammaiyappan Selvam, Jonathan W C WONG^*

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › peer-review

51 Citations (Scopus)

Abstract

In this study, filamentous fungal strains isolated from sewage sludge bioleached with iron-oxidizing bacteria were evaluated their effectiveness in improving the flocculation and dewaterability of chemically enhanced primary treatment (CEPT) sludge. Augmentation of the pre-grown mycelial biomass in the CEPT sludge had no significant changes in sludge pH but, improved sludge dewaterability, as evidenced from the decrease in capillary suction time. Improvement on sludge flocculation and dewaterability depended on the fungal strains, and a pellet forming Penicillium sp. was more effective than the fungal isolates producing filamentous form of mycelial biomass due to entrapment of sludge solids onto mycelial pellets. Fungal treatment also reduced the chemical oxygen demand of the CEPT sludge by 35-76%. Supplementation metal cations (Ca²⁺, Mg²⁺, and Fe³⁺) to fungal pre-augmented sludge rapidly improved the sludge dewaterability. This study indicates that augmentation of selective fungal biomass can be a potential method for CEPT sludge flocculation and dewaterability.

Original language	English
Pages (from-to)	198-203
Number of pages	6
Journal	Bioresource Technology
Volume	168
DOIs	https://doi.org/10.1016/j.biortech.2014.04.063
Publication status	Published - Sept 2014

Scopus Subject Areas

Bioengineering
Environmental Engineering
Renewable Energy, Sustainability and the Environment
Waste Management and Disposal

User-Defined Keywords

CEPT sludge
Dewaterability
Filamentous fungi
Flocculation
Mycelial pellet

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.biortech.2014.04.063

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title = "Flocculation and dewaterability of chemically enhanced primary treatment sludge by bioaugmentation with filamentous fungi",

abstract = "In this study, filamentous fungal strains isolated from sewage sludge bioleached with iron-oxidizing bacteria were evaluated their effectiveness in improving the flocculation and dewaterability of chemically enhanced primary treatment (CEPT) sludge. Augmentation of the pre-grown mycelial biomass in the CEPT sludge had no significant changes in sludge pH but, improved sludge dewaterability, as evidenced from the decrease in capillary suction time. Improvement on sludge flocculation and dewaterability depended on the fungal strains, and a pellet forming Penicillium sp. was more effective than the fungal isolates producing filamentous form of mycelial biomass due to entrapment of sludge solids onto mycelial pellets. Fungal treatment also reduced the chemical oxygen demand of the CEPT sludge by 35-76%. Supplementation metal cations (Ca2+, Mg2+, and Fe3+) to fungal pre-augmented sludge rapidly improved the sludge dewaterability. This study indicates that augmentation of selective fungal biomass can be a potential method for CEPT sludge flocculation and dewaterability.",

keywords = "CEPT sludge, Dewaterability, Filamentous fungi, Flocculation, Mycelial pellet",

author = "Kumarasamy Murugesan and Ammaiyappan Selvam and WONG, {Jonathan W C}",

note = "Funding Information: This work was performed with the support of Innovation and Technology Support Programme (Project No. ITS/297/11), Innovation and Technology Commission, Hong Kong SAR Government.",

year = "2014",

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doi = "10.1016/j.biortech.2014.04.063",

language = "English",

volume = "168",

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journal = "Bioresource Technology",

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T1 - Flocculation and dewaterability of chemically enhanced primary treatment sludge by bioaugmentation with filamentous fungi

AU - Murugesan, Kumarasamy

AU - Selvam, Ammaiyappan

AU - WONG, Jonathan W C

N1 - Funding Information: This work was performed with the support of Innovation and Technology Support Programme (Project No. ITS/297/11), Innovation and Technology Commission, Hong Kong SAR Government.

PY - 2014/9

Y1 - 2014/9

N2 - In this study, filamentous fungal strains isolated from sewage sludge bioleached with iron-oxidizing bacteria were evaluated their effectiveness in improving the flocculation and dewaterability of chemically enhanced primary treatment (CEPT) sludge. Augmentation of the pre-grown mycelial biomass in the CEPT sludge had no significant changes in sludge pH but, improved sludge dewaterability, as evidenced from the decrease in capillary suction time. Improvement on sludge flocculation and dewaterability depended on the fungal strains, and a pellet forming Penicillium sp. was more effective than the fungal isolates producing filamentous form of mycelial biomass due to entrapment of sludge solids onto mycelial pellets. Fungal treatment also reduced the chemical oxygen demand of the CEPT sludge by 35-76%. Supplementation metal cations (Ca2+, Mg2+, and Fe3+) to fungal pre-augmented sludge rapidly improved the sludge dewaterability. This study indicates that augmentation of selective fungal biomass can be a potential method for CEPT sludge flocculation and dewaterability.

AB - In this study, filamentous fungal strains isolated from sewage sludge bioleached with iron-oxidizing bacteria were evaluated their effectiveness in improving the flocculation and dewaterability of chemically enhanced primary treatment (CEPT) sludge. Augmentation of the pre-grown mycelial biomass in the CEPT sludge had no significant changes in sludge pH but, improved sludge dewaterability, as evidenced from the decrease in capillary suction time. Improvement on sludge flocculation and dewaterability depended on the fungal strains, and a pellet forming Penicillium sp. was more effective than the fungal isolates producing filamentous form of mycelial biomass due to entrapment of sludge solids onto mycelial pellets. Fungal treatment also reduced the chemical oxygen demand of the CEPT sludge by 35-76%. Supplementation metal cations (Ca2+, Mg2+, and Fe3+) to fungal pre-augmented sludge rapidly improved the sludge dewaterability. This study indicates that augmentation of selective fungal biomass can be a potential method for CEPT sludge flocculation and dewaterability.

KW - CEPT sludge

KW - Dewaterability

KW - Filamentous fungi

KW - Flocculation

KW - Mycelial pellet

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DO - 10.1016/j.biortech.2014.04.063

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AN - SCOPUS:84905046335

SN - 0960-8524

VL - 168

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JO - Bioresource Technology

JF - Bioresource Technology

ER -

Flocculation and dewaterability of chemically enhanced primary treatment sludge by bioaugmentation with filamentous fungi

Abstract

Scopus Subject Areas

User-Defined Keywords

UN SDGs

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