High-rate activated sludge processes for municipal wastewater treatment: the effect of food waste addition and hydraulic limits of the system

Huseyin Guven; Hale Ozgun; Mustafa Evren Ersahin; Recep Kaan Dereli; Ilknur Sinop; Izzet Ozturk

doi:10.1007/s11356-018-3665-8

High-rate activated sludge processes for municipal wastewater treatment: the effect of food waste addition and hydraulic limits of the system

Huseyin Guven^*, Hale Ozgun, Mustafa Evren Ersahin, Recep Kaan Dereli, Ilknur Sinop, Izzet Ozturk

^*Corresponding author for this work

Department of Environmental Engineering

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

Abstract

Conventional activated sludge (CAS) process is one of the most commonly applied processes for municipal wastewater treatment. However, it requires a high energy input and does not promote energy recovery. Currently, high-rate activated sludge (HRAS) process is gaining importance as a good option to reduce the energy demand of wastewater treatment and to capture organic matter for valorizing through anaerobic digestion (AD). Besides, food waste addition to wastewater can help to increase the organic matter content of wastewater and thus, energy recovery in AD. The objective of this study is to evaluate the applicability of co-treatment of municipal wastewater and food waste in a pilot-scale HRAS system as well as to test the minimal hydraulic retention times (HRTs) such as 60 and 30 min. Food waste addition to the wastewater resulted in a 10% increase in chemical oxygen demand (COD) concentration of influent. In the following stages of the study, the pilot-scale system was operated with wastewater solely under the HRTs of 60 and 30 min. With the decrease of HRT, particulate COD removal increased; however, soluble COD removal decreased. The results demonstrated that if the settling process is optimized, more particulate matter can be diverted to sludge stream.

Original language	English
Pages (from-to)	1770-1780
Number of pages	11
Journal	Environmental Science and Pollution Research
Volume	26
Issue number	2
DOIs	https://doi.org/10.1007/s11356-018-3665-8
Publication status	Published - 21 Jan 2019

Bibliographical note

Publisher Copyright:
© 2018, Springer-Verlag GmbH Germany, part of Springer Nature.

Funding

Funding information This study was financially supported by the Ministry of Science, Industry and Technology of Turkey, and Istanbul Environment Management Industry and Trade Company (ISTAC) (Project no. 0534.STZ.2013-2), and Istanbul Technical University Scientific Research Projects Office (Project no. 38833).

Funders	Funder number
ISTAC	0534.STZ.2013-2
Istanbul Environment Management Industry and Trade Company
Istanbul Technical University Scientific Research Projects Office	38833
Ministry of Science, Industry and Technology of Turkey

Keywords

Co-treatment
Food waste
High-rate activated sludge process
Hydraulic retention time
Municipal wastewater
Particulate chemical oxygen demand

UN SDGs

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

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10.1007/s11356-018-3665-8

Cite this

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abstract = "Conventional activated sludge (CAS) process is one of the most commonly applied processes for municipal wastewater treatment. However, it requires a high energy input and does not promote energy recovery. Currently, high-rate activated sludge (HRAS) process is gaining importance as a good option to reduce the energy demand of wastewater treatment and to capture organic matter for valorizing through anaerobic digestion (AD). Besides, food waste addition to wastewater can help to increase the organic matter content of wastewater and thus, energy recovery in AD. The objective of this study is to evaluate the applicability of co-treatment of municipal wastewater and food waste in a pilot-scale HRAS system as well as to test the minimal hydraulic retention times (HRTs) such as 60 and 30 min. Food waste addition to the wastewater resulted in a 10% increase in chemical oxygen demand (COD) concentration of influent. In the following stages of the study, the pilot-scale system was operated with wastewater solely under the HRTs of 60 and 30 min. With the decrease of HRT, particulate COD removal increased; however, soluble COD removal decreased. The results demonstrated that if the settling process is optimized, more particulate matter can be diverted to sludge stream.",

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AB - Conventional activated sludge (CAS) process is one of the most commonly applied processes for municipal wastewater treatment. However, it requires a high energy input and does not promote energy recovery. Currently, high-rate activated sludge (HRAS) process is gaining importance as a good option to reduce the energy demand of wastewater treatment and to capture organic matter for valorizing through anaerobic digestion (AD). Besides, food waste addition to wastewater can help to increase the organic matter content of wastewater and thus, energy recovery in AD. The objective of this study is to evaluate the applicability of co-treatment of municipal wastewater and food waste in a pilot-scale HRAS system as well as to test the minimal hydraulic retention times (HRTs) such as 60 and 30 min. Food waste addition to the wastewater resulted in a 10% increase in chemical oxygen demand (COD) concentration of influent. In the following stages of the study, the pilot-scale system was operated with wastewater solely under the HRTs of 60 and 30 min. With the decrease of HRT, particulate COD removal increased; however, soluble COD removal decreased. The results demonstrated that if the settling process is optimized, more particulate matter can be diverted to sludge stream.

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High-rate activated sludge processes for municipal wastewater treatment: the effect of food waste addition and hydraulic limits of the system

Abstract

Bibliographical note

Funding

Keywords

UN SDGs

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