Characteristics of organic matter released from drinking water treatment sludge under different storage conditions: Evaluation based on activated carbon adsorbability

Sri Anggreini; Maulana Yusup Rosadi; Toshiro Yamada; Hudori Hudori; Zhiyi Deng; Fusheng Li

doi:10.1016/j.chemosphere.2023.139679

Characteristics of organic matter released from drinking water treatment sludge under different storage conditions: Evaluation based on activated carbon adsorbability

Chemosphere. 2023 Oct:339:139679. doi: 10.1016/j.chemosphere.2023.139679. Epub 2023 Jul 29.

Authors

Sri Anggreini¹, Maulana Yusup Rosadi², Toshiro Yamada³, Hudori Hudori⁴, Zhiyi Deng⁵, Fusheng Li⁶

Affiliations

¹ Graduate School of Engineering, Gifu University, Gifu, 501-1193, Japan. Electronic address: a3921011@edu.gifu-u.ac.jp.
² Department of Civil Engineering, Borobudur University, Jakarta, 13620, Indonesia. Electronic address: mrosadi@borobudur.ac.id.
³ Faculty of Engineering, Hokkai-Gakuen University, Sapporo, 064-0926, Japan. Electronic address: yamada@hgu.jp.
⁴ Department of Environmental Engineering, Islamic University of Indonesia, Yogyakarta, 55584, Indonesia. Electronic address: hudori@uii.ac.id.
⁵ College of Environment and Resources, Xiangtan University, Xiangtan, 411105, China. Electronic address: zhydeng2008@xtu.edu.cn.
⁶ Graduate School of Engineering, Gifu University, Gifu, 501-1193, Japan; River Basin Research Center, Gifu University, Gifu, 501-1193, Japan. Electronic address: lifs@gifu-u.ac.jp.

PMID: 37524268
DOI: 10.1016/j.chemosphere.2023.139679

Abstract

Recycling water from drinking water treatment sludge (DWTS) as raw water raises several problems in the drinking water supply. In this study, the impact of storage temperatures and oxygen conditions for DWTS on the characteristics of dissolved organic matter (DOM) released from sludge was evaluated in terms of adsorbability by activated carbon. Results showed that the adsorbability of the released DOM varied greatly with storage temperatures and oxygen conditions. The modified Freundlich isotherm model revealed that the average adsorption strength (K_F) estimated based on dissolved organic carbon (DOC) and ultraviolet absorbance at 260 nm (UV₂₆₀) varied in the ranges of 4.01-12.1 (mg g^-1)^1-1/n and 23.1-52.6 (L m^-1 g^-1)^1-1/n, respectively. DOM released under the condition without aeration possessed higher adsorbability compared to DOM released under the condition with aeration (1.41-3.01 times for DOC-based; 1.14-2.28 times for UV₂₆₀-based). Moreover, the K_F values of fluorescence excitation-emission matrix (EEM)-based fulvic acid-like and humic acid-like substances were higher than those of tyrosine-like and tryptophan-like substances, indicating humic-like substances released from DWTS were more adsorbable than protein-like ones. The methods or adsorption conditions that can enhance the removal of protein-like substances are essential for dealing with water quality problems associated with recycling water from drinking water treatment sludge.

Keywords: Activated carbon; Adsorption; Dissolved organic matter; Drinking water treatment sludge; Humic substances; Water reuse.

MeSH terms

Charcoal
Dissolved Organic Matter
Drinking Water*
Humic Substances / analysis
Organic Chemicals / analysis
Sewage
Spectrometry, Fluorescence
Water Purification* / methods

Substances

Charcoal
Organic Chemicals
Sewage
Drinking Water
Dissolved Organic Matter
Humic Substances