Treatment of cooling tower blowdown water by using adsorption-electrocatalytic oxidation: Technical performance, toxicity assessment and economic evaluation

Li，Xiaoliang1; Wu，Linjie1,2; Lu，Sijia1; Yang，Heyun1; Xie，Wenzhou3; Zhao，Huiyan4; Zhang，Yaozhong1; Cao，Xin1; Tang，Gang1,5; Li，Hesheng3; Feng，Jiangtao6; Yan，Wei6; Zheng，Xing1

2020-12-01

10.1016/j.seppur.2020.117484

SEPARATION AND PURIFICATION TECHNOLOGY   影响因子和分区

1383-5866

1873-3794

An eco-friendly process was adopted to treat cooling tower blowdown water (CTBD) and the toxicity of correspondingly produced water/eluate was evaluated using the transcriptional effect level index (TELI) based on toxicogenomics. The objective of the work is to provide a feasible treatment loop including adsorption to remove organics and phosphorus from CTBD, electrocatalytic oxidation to improve the biodegradability of the eluate after desorption. Results showed that PANI/TiO was a promising adsorbent in the removal of organics and phosphorus from CTBD and exhibited a satisfied regeneration ability beyond 30 times of reuse. During the electrocatalytic oxidation process the biodegradability of desorption eluate was gradually increasing and BOD/COD of the oxidized eluate reached 0.4 after 4.8 h of treatment, indicating that the treated wastewater could be returned to the biological treatment loop for further processing. The analysis of the quantitative toxicogenomics assay revealed that the toxicity of CTBD was mainly caused by oxidizing biocides of trichloroisocyanuric acid (TCCA), leading to a significant membrane stress response of bacteria. And the toxicity level of CTBD decreased after adsorption treatment while the desorption eluate experienced increase and then decrease during the electrocatalytic oxidation, meaning that certain oxidation duration was needed to keep the eluate safe for biological treatment. According to economic analysis, the operation cost of treatment loop was estimated at around 0.6 dollars/m, ensuring high reuse water quality and safe eluate for further biological treatment.

Biodegradability Cooling tower blowdown water Eco-friendly process Toxicity Transcriptional effect level index

SCI ; EI

英语

其他

National Natural Science Foundation of China[51878555][51738012] ; Shaanxi International Cooperation Foundation from Shaanxi Provincial Science and Technology Department[2017KW-041] ; Natural Science Basic Research Plan in Shaanxi Province of China[2019JQ-735]

Engineering

Engineering, Chemical

WOS:000565592000002

ELSEVIER

20203209017108

Biodegradability ; Forecasting ; Desorption ; Economic analysis ; Biological water treatment ; Oxidation ; Water quality ; Water conservation ; Cooling ; Adsorption ; Phosphorus ; Quality control ; Wastewater treatment ; Wastewater reclamation

Water Resources:444 ; Water Treatment Techniques:445.1 ; Water Analysis:445.2 ; Industrial Wastes Treatment and Disposal:452.4 ; Health Care:461.7 ; Heat Transfer:641.2 ; Biochemistry:801.2 ; Chemical Reactions:802.2 ; Chemical Operations:802.3 ; Chemical Products Generally:804 ; Industrial Economics:911.2 ; Quality Assurance and Control:913.3

CHEMISTRY

2-s2.0-85088993632

Scopus

1.State Key Laboratory of Eco-hydraulics in Northwest Arid Region,Xi'an University of Technology,Xi'an,710048,China
2.Xi'an Municipal Engineering Design & Research Institute Co.,Ltd.,Xi'an,710068,China
3.Environmental Protection Institute,Sinopec Beijing Research Institute of Chemical Industry,Beijing,100103,China
4.Department of Equipment Engineering,Sinopec Luoyang Company,Luoyang,471012,China
5.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
6.Department of Environmental Science and Engineering,Xi'an Jiaotong University,Xi'an,710049,China

Li，Xiaoliang,Wu，Linjie,Lu，Sijia,et al. Treatment of cooling tower blowdown water by using adsorption-electrocatalytic oxidation: Technical performance, toxicity assessment and economic evaluation[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2020,252.

Li，Xiaoliang.,Wu，Linjie.,Lu，Sijia.,Yang，Heyun.,Xie，Wenzhou.,...&Zheng，Xing.(2020).Treatment of cooling tower blowdown water by using adsorption-electrocatalytic oxidation: Technical performance, toxicity assessment and economic evaluation.SEPARATION AND PURIFICATION TECHNOLOGY,252.

Li，Xiaoliang,et al."Treatment of cooling tower blowdown water by using adsorption-electrocatalytic oxidation: Technical performance, toxicity assessment and economic evaluation".SEPARATION AND PURIFICATION TECHNOLOGY 252(2020).