A comparatively optimization of dosages of oxidation agents based on volatile solids and dry solids content in dewatering of sewage sludge

Wenbo Yu; Jiakuan Yang; Shuangyi Tao; Yafei Shi; Jiangwei Yu; Yang Lv; Sha Liang; Keke Xiao; Bingchuan Liu; Huijie Hou; Jingping Hu; Xu Wu

doi:10.1016/j.watres.2017.09.044

A comparatively optimization of dosages of oxidation agents based on volatile solids and dry solids content in dewatering of sewage sludge

Wenbo Yu, Jiakuan Yang^*, Shuangyi Tao, Yafei Shi, Jiangwei Yu, Yang Lv, Sha Liang, Keke Xiao, Bingchuan Liu, Huijie Hou, Jingping Hu, Xu Wu

^*Corresponding author for this work

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

61 Scopus citations

Abstract

Organic content of sludge is a major factor influencing its dewaterability. Conditioning sewage sludge with oxidation reagents (Fenton's reagent or Fe²⁺/persulfate) can effectively improve sludge dewaterability. In traditional conditioning process of sewage sludge, the optimization of conditioner dosage were commonly based on volume of sludge (referred as mg/L) or mass of dry solid (DS) of sludge (referred as mg/g DS). However, inconsistency of the oxidation dose mode existed for different sewage sludge sources. In this study, sludge samples of different volatile solids (VS) contents were used to derive optimal dosages of Fenton's reagent and Fe²⁺/persulfate, using the response surface methodology (RSM). For the case of Fenton's reagent, the optimal dosages of Fe²⁺ and H₂O₂ were 107–110 mg/g VS and 86–88 mg/g VS, respectively. For Fe²⁺/persulfate, the optimal dosages of Fe²⁺ and persulfate were 49 mg/g VS and 269–271 mg/g VS, respectively. The optimal dosages of the oxidation reagents based on VS contents were proved to be consistent and effective for different sewage sludge with different organic matter contents from different wastewater treatment plants (WWTPs). In contrast, the optimal dosages of oxidation reagents, based on DS, fluctuated significantly for different sludge sources. Furthermore, sewage sludge dewaterability was significantly related to the degradation and the content of loosely bound extracellular polymeric substances (LB-EPS) in the organic matters of conditioned sludge (R² > 0.9, p < 0.01). Thus, the improvement of sludge dewaterability could be related with the destruction of the VS in sludge with the conditioners of oxidant reagent. It indicated that optimization of oxidation reagent based on VS content is more plausible than that of based on DS content for different sewage sludge with different organic matter contents.

Original language	English
Pages (from-to)	342-350
Number of pages	9
Journal	Water Research
Volume	126
DOIs	https://doi.org/10.1016/j.watres.2017.09.044
State	Published - 2017
Externally published	Yes

Keywords

Advanced oxidation reagent
Dewaterability
Extracellular polymeric substances
Response surface methodology
Sewage sludge conditioning

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10.1016/j.watres.2017.09.044

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title = "A comparatively optimization of dosages of oxidation agents based on volatile solids and dry solids content in dewatering of sewage sludge",

abstract = "Organic content of sludge is a major factor influencing its dewaterability. Conditioning sewage sludge with oxidation reagents (Fenton's reagent or Fe2+/persulfate) can effectively improve sludge dewaterability. In traditional conditioning process of sewage sludge, the optimization of conditioner dosage were commonly based on volume of sludge (referred as mg/L) or mass of dry solid (DS) of sludge (referred as mg/g DS). However, inconsistency of the oxidation dose mode existed for different sewage sludge sources. In this study, sludge samples of different volatile solids (VS) contents were used to derive optimal dosages of Fenton's reagent and Fe2+/persulfate, using the response surface methodology (RSM). For the case of Fenton's reagent, the optimal dosages of Fe2+ and H2O2 were 107–110 mg/g VS and 86–88 mg/g VS, respectively. For Fe2+/persulfate, the optimal dosages of Fe2+ and persulfate were 49 mg/g VS and 269–271 mg/g VS, respectively. The optimal dosages of the oxidation reagents based on VS contents were proved to be consistent and effective for different sewage sludge with different organic matter contents from different wastewater treatment plants (WWTPs). In contrast, the optimal dosages of oxidation reagents, based on DS, fluctuated significantly for different sludge sources. Furthermore, sewage sludge dewaterability was significantly related to the degradation and the content of loosely bound extracellular polymeric substances (LB-EPS) in the organic matters of conditioned sludge (R2 > 0.9, p < 0.01). Thus, the improvement of sludge dewaterability could be related with the destruction of the VS in sludge with the conditioners of oxidant reagent. It indicated that optimization of oxidation reagent based on VS content is more plausible than that of based on DS content for different sewage sludge with different organic matter contents.",

keywords = "Advanced oxidation reagent, Dewaterability, Extracellular polymeric substances, Response surface methodology, Sewage sludge conditioning",

author = "Wenbo Yu and Jiakuan Yang and Shuangyi Tao and Yafei Shi and Jiangwei Yu and Yang Lv and Sha Liang and Keke Xiao and Bingchuan Liu and Huijie Hou and Jingping Hu and Xu Wu",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier Ltd",

year = "2017",

doi = "10.1016/j.watres.2017.09.044",

language = "英语",

volume = "126",

pages = "342--350",

journal = "Water Research",

issn = "0043-1354",

publisher = "Elsevier Ltd.",

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TY - JOUR

T1 - A comparatively optimization of dosages of oxidation agents based on volatile solids and dry solids content in dewatering of sewage sludge

AU - Yu, Wenbo

AU - Yang, Jiakuan

AU - Tao, Shuangyi

AU - Shi, Yafei

AU - Yu, Jiangwei

AU - Lv, Yang

AU - Liang, Sha

AU - Xiao, Keke

AU - Liu, Bingchuan

AU - Hou, Huijie

AU - Hu, Jingping

AU - Wu, Xu

PY - 2017

Y1 - 2017

N2 - Organic content of sludge is a major factor influencing its dewaterability. Conditioning sewage sludge with oxidation reagents (Fenton's reagent or Fe2+/persulfate) can effectively improve sludge dewaterability. In traditional conditioning process of sewage sludge, the optimization of conditioner dosage were commonly based on volume of sludge (referred as mg/L) or mass of dry solid (DS) of sludge (referred as mg/g DS). However, inconsistency of the oxidation dose mode existed for different sewage sludge sources. In this study, sludge samples of different volatile solids (VS) contents were used to derive optimal dosages of Fenton's reagent and Fe2+/persulfate, using the response surface methodology (RSM). For the case of Fenton's reagent, the optimal dosages of Fe2+ and H2O2 were 107–110 mg/g VS and 86–88 mg/g VS, respectively. For Fe2+/persulfate, the optimal dosages of Fe2+ and persulfate were 49 mg/g VS and 269–271 mg/g VS, respectively. The optimal dosages of the oxidation reagents based on VS contents were proved to be consistent and effective for different sewage sludge with different organic matter contents from different wastewater treatment plants (WWTPs). In contrast, the optimal dosages of oxidation reagents, based on DS, fluctuated significantly for different sludge sources. Furthermore, sewage sludge dewaterability was significantly related to the degradation and the content of loosely bound extracellular polymeric substances (LB-EPS) in the organic matters of conditioned sludge (R2 > 0.9, p < 0.01). Thus, the improvement of sludge dewaterability could be related with the destruction of the VS in sludge with the conditioners of oxidant reagent. It indicated that optimization of oxidation reagent based on VS content is more plausible than that of based on DS content for different sewage sludge with different organic matter contents.

AB - Organic content of sludge is a major factor influencing its dewaterability. Conditioning sewage sludge with oxidation reagents (Fenton's reagent or Fe2+/persulfate) can effectively improve sludge dewaterability. In traditional conditioning process of sewage sludge, the optimization of conditioner dosage were commonly based on volume of sludge (referred as mg/L) or mass of dry solid (DS) of sludge (referred as mg/g DS). However, inconsistency of the oxidation dose mode existed for different sewage sludge sources. In this study, sludge samples of different volatile solids (VS) contents were used to derive optimal dosages of Fenton's reagent and Fe2+/persulfate, using the response surface methodology (RSM). For the case of Fenton's reagent, the optimal dosages of Fe2+ and H2O2 were 107–110 mg/g VS and 86–88 mg/g VS, respectively. For Fe2+/persulfate, the optimal dosages of Fe2+ and persulfate were 49 mg/g VS and 269–271 mg/g VS, respectively. The optimal dosages of the oxidation reagents based on VS contents were proved to be consistent and effective for different sewage sludge with different organic matter contents from different wastewater treatment plants (WWTPs). In contrast, the optimal dosages of oxidation reagents, based on DS, fluctuated significantly for different sludge sources. Furthermore, sewage sludge dewaterability was significantly related to the degradation and the content of loosely bound extracellular polymeric substances (LB-EPS) in the organic matters of conditioned sludge (R2 > 0.9, p < 0.01). Thus, the improvement of sludge dewaterability could be related with the destruction of the VS in sludge with the conditioners of oxidant reagent. It indicated that optimization of oxidation reagent based on VS content is more plausible than that of based on DS content for different sewage sludge with different organic matter contents.

KW - Advanced oxidation reagent

KW - Dewaterability

KW - Extracellular polymeric substances

KW - Response surface methodology

KW - Sewage sludge conditioning

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U2 - 10.1016/j.watres.2017.09.044

DO - 10.1016/j.watres.2017.09.044

M3 - 文章

C2 - 28972938

AN - SCOPUS:85030973426

SN - 0043-1354

VL - 126

SP - 342

EP - 350

JO - Water Research

JF - Water Research

ER -

A comparatively optimization of dosages of oxidation agents based on volatile solids and dry solids content in dewatering of sewage sludge

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Keywords

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