The biodegradability of aquatic worm predated waste activated sludge: A sequential aerobic and anaerobic treatment approach

Steef de Valk; Tales A. Tavares de Sousa; Ahmad F. Khadem; Jules B. van Lier; Merle K. de Kreuk

doi:10.1016/j.biteb.2020.100606

The biodegradability of aquatic worm predated waste activated sludge: A sequential aerobic and anaerobic treatment approach

Steef de Valk^*, Tales A. Tavares de Sousa, Ahmad F. Khadem, Jules B. van Lier, Merle K. de Kreuk

^*Corresponding author for this work

Sanitary Engineering

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Abstract

The objective of this study was to investigate the effect of waste activated sludge (WAS) predation by the aquatic worm Tubifex tubifex (T. tubifex) on the overall biodegradability of WAS. The initial WAS biodegradability potential was determined in 80 days sequential batch-fed anaerobic and aerobic treatment combinations. These treatment combinations were used as a reference for comparison with the effect of 5-day predation and 40-day anaerobic treatment combinations. Predation and the subsequent anaerobic digestion of the predated solids shows superior solids removal and superior overall conversion rates compared to solely conventional anaerobic digestion. Strikingly, the predation and anaerobic treatment combinations reached the same chemical oxygen demand (COD) and volatile solids (VS) reduction as the reference processes, i.e. 58% and 49% for COD and VS, respectively. Our results show that predation and anaerobic treatment combinations increase solids removal rates, but do not alter the overall biodegradability potential of WAS.

Original language	English
Article number	100606
Pages (from-to)	1-7
Number of pages	7
Journal	Bioresource Technology Reports
Volume	12
DOIs	https://doi.org/10.1016/j.biteb.2020.100606
Publication status	Published - 2020

Keywords

Biodegradability
Digestibility
Sequential treatment
T. tubifex
WAS
Worm predation

UN SDGs

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

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10.1016/j.biteb.2020.100606

1-s2.0-S2589014X20302280-mainFinal published version, 527 KBLicence: CC BY

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title = "The biodegradability of aquatic worm predated waste activated sludge: A sequential aerobic and anaerobic treatment approach",

abstract = "The objective of this study was to investigate the effect of waste activated sludge (WAS) predation by the aquatic worm Tubifex tubifex (T. tubifex) on the overall biodegradability of WAS. The initial WAS biodegradability potential was determined in 80 days sequential batch-fed anaerobic and aerobic treatment combinations. These treatment combinations were used as a reference for comparison with the effect of 5-day predation and 40-day anaerobic treatment combinations. Predation and the subsequent anaerobic digestion of the predated solids shows superior solids removal and superior overall conversion rates compared to solely conventional anaerobic digestion. Strikingly, the predation and anaerobic treatment combinations reached the same chemical oxygen demand (COD) and volatile solids (VS) reduction as the reference processes, i.e. 58% and 49% for COD and VS, respectively. Our results show that predation and anaerobic treatment combinations increase solids removal rates, but do not alter the overall biodegradability potential of WAS.",

keywords = "Biodegradability, Digestibility, Sequential treatment, T. tubifex, WAS, Worm predation",

author = "{de Valk}, Steef and {Tavares de Sousa}, {Tales A.} and Khadem, {Ahmad F.} and {van Lier}, {Jules B.} and {de Kreuk}, {Merle K.}",

year = "2020",

doi = "10.1016/j.biteb.2020.100606",

language = "English",

volume = "12",

pages = "1--7",

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T1 - The biodegradability of aquatic worm predated waste activated sludge

T2 - A sequential aerobic and anaerobic treatment approach

AU - de Valk, Steef

AU - Tavares de Sousa, Tales A.

AU - Khadem, Ahmad F.

AU - van Lier, Jules B.

AU - de Kreuk, Merle K.

PY - 2020

Y1 - 2020

N2 - The objective of this study was to investigate the effect of waste activated sludge (WAS) predation by the aquatic worm Tubifex tubifex (T. tubifex) on the overall biodegradability of WAS. The initial WAS biodegradability potential was determined in 80 days sequential batch-fed anaerobic and aerobic treatment combinations. These treatment combinations were used as a reference for comparison with the effect of 5-day predation and 40-day anaerobic treatment combinations. Predation and the subsequent anaerobic digestion of the predated solids shows superior solids removal and superior overall conversion rates compared to solely conventional anaerobic digestion. Strikingly, the predation and anaerobic treatment combinations reached the same chemical oxygen demand (COD) and volatile solids (VS) reduction as the reference processes, i.e. 58% and 49% for COD and VS, respectively. Our results show that predation and anaerobic treatment combinations increase solids removal rates, but do not alter the overall biodegradability potential of WAS.

AB - The objective of this study was to investigate the effect of waste activated sludge (WAS) predation by the aquatic worm Tubifex tubifex (T. tubifex) on the overall biodegradability of WAS. The initial WAS biodegradability potential was determined in 80 days sequential batch-fed anaerobic and aerobic treatment combinations. These treatment combinations were used as a reference for comparison with the effect of 5-day predation and 40-day anaerobic treatment combinations. Predation and the subsequent anaerobic digestion of the predated solids shows superior solids removal and superior overall conversion rates compared to solely conventional anaerobic digestion. Strikingly, the predation and anaerobic treatment combinations reached the same chemical oxygen demand (COD) and volatile solids (VS) reduction as the reference processes, i.e. 58% and 49% for COD and VS, respectively. Our results show that predation and anaerobic treatment combinations increase solids removal rates, but do not alter the overall biodegradability potential of WAS.

KW - Biodegradability

KW - Digestibility

KW - Sequential treatment

KW - T. tubifex

KW - WAS

KW - Worm predation

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DO - 10.1016/j.biteb.2020.100606

M3 - Article

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SP - 1

EP - 7

JO - Bioresource Technology Reports

JF - Bioresource Technology Reports

M1 - 100606

ER -

The biodegradability of aquatic worm predated waste activated sludge: A sequential aerobic and anaerobic treatment approach

Abstract

Keywords

UN SDGs

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