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Evaluation of fly‐ash additive for removal of dissolved organic matter during soil aquifer treatment of wastewater treatment plant Peffluent
Author(s) -
Wei Liangliang,
Wang Kun,
Zhao Qingliang,
Xue Shuang,
Jia Ting,
You Peiyuan
Publication year - 2010
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.2448
Subject(s) - dissolved organic carbon , chemistry , organic matter , environmental chemistry , biodegradation , effluent , adsorption , wastewater , sewage treatment , fractionation , soil organic matter , trihalomethane , soil water , environmental engineering , environmental science , chromatography , soil science , organic chemistry , chlorine
Abstract BACKGROUND: Fly‐ash (FA) additive was evaluated for enhanced removal of organic matter during soil aquifer treatment (SAT) of a wastewater treatment plant (WWTP) effluent in five 0.50 m length columns (diameter 0.1 m) in parallel. RESULTS: The characteristic behavior of dissolved organic matter (DOM) was examined for the stratum matrix configurations of both natural soil and a mixture of soil and FA. Incubation and fractionation experiments indicated that FA additive within the SAT columns would enhance the bulk adsorption of hydrophobic fractions, but decrease the biodegradation of the hydrophilic fraction simultaneously. The configuration design of an upper 0.25 m soil layer and a mixture of FA and soil underneath could make use of the functions of both FA adsorption and biodegradation within soil, which could lead to a further fractional removal of dissolved organic carbon (DOC) and trihalomethane formation potential (THMFP). Moreover, FA additive in the SAT columns could result in a significant decrease of tryptophan‐like aromatic proteins and fulvic‐like components (CC and CO related), while the setting of the top 25 cm soil layer would lead to a further reduction of oxygen‐containing functional groups. CONCLUSIONS: Based on the results, FA might serve as a supplementary material for enhancing the reduction of DOM during SAT operation. Copyright © 2010 Society of Chemical Industry