Experimental study on the application of nanofiltration concentrated water in the preparation of burning-free bricks

ABSTRACT

The realization of zero discharge of desulfurization wastewater has become a major trend in the environmental protection of power plants. After the desulfurization wastewater is treated by the nanofiltration process, a certain amount of nanofiltration concentrated water will be produced. Based on the water quality and quantity analysis of nanofiltration concentrate, this study proposes to apply nanofiltration concentrate to the preparation of free-sintering brick to realize the resource utilization of nanofiltration concentrate. The results show that the optimal ratio of the cement-to slag ratio ratio is 1:0.8, the 28d strength of the solidified body is 18.64MPa, the water absorption rate is 15.9%, and the water-soluble chloride ion content is 4.8%. In order to further optimize the production technology to improve the performance of the curing body, the later experiments optimized the curing formulation with the water-reducing agent sodium lignosulfonate as an admixture and obtained the optimal addition ratio of sodium lignosulfonate which was 0.2%. Finally, an economic evaluation was conducted and the use of nanofiltration concentrate for the preparation of free sintering brick could bring considerable economic benefits to the power plant while achieving the purpose of reducing environmental pollution and reducing the investment cost of environmental management.

KEYWORDS:

• Nanofiltration concentrate
• solidification
• free sintering brick
• slag
• water reducing agent
• experimental study

Disclosure statement

No potential conflict of interest was reported by the author(s).

Data available on request due to privacy/ethical restrictions

The data that support the findings of this study are available on request from the corresponding author, [S. Ma]. The data are not publicly available due to [restrictions e.g. their containing information that could compromise the privacy of research participants]. Basic, Share upon Request

Data subject to third party restrictions

The data that support the findings of this study are available [from] [third party]. Restrictions apply to the availability of these data, which were used under license for this study. Data are available [from the authors] with the permission of [third party]. Basic, Share upon Request

Data available on request from the authors

The data that support the findings of this study are available from the corresponding author, [author S. Ma], upon reasonable request. Basic, Share upon Request

Data not available due to [ethical/legal/commercial] restrictions

Due to the nature of the research, due to [ethical/legal/commercial] supporting data is not available. All

Data not available - participant consent

The participants of this study did not give written consent for their data to be shared publicly, so due to the sensitive nature of the research supporting data is not available.

Additional information

Notes on contributors

Rui Lu

Rui Lu is a graduate student in the Department of Environmental Science and Engineering at North China Electric Power University (Bao ding). His advisor is Professor Shuangchen Ma, and his primary research areas include desulphurization wastewater treatment and Carbon dioxide mineralization.

Lei Li

Lei Li is currently working in Zhuozhou Jingyuan Power Company Limited. His work is divided into the Equipment management department. His title is senior engineer.

Juanjuan Yao

Juanjuan Yao graduated from North China Electric Power University and now works at Swedish Environmental Science Research Co., LTD. Her research focuses on carbon asset management.

Yaohui Kong

Yaohui Kong is a graduate student in the Department of Environmental Science and Engineering at North China Electric Power University (Bao ding). His advisor is Professor Shuangchen Ma, and his primary research areas include Treatment of iron tailings and life cycle evaluation of aerated concrete.

Jinqiang Liu

Jinqiang Liu is currently working in Zhuozhou Jingyuan Power Company Limited. His work is divided into the Equipment management department. His title is senior engineer.

Lin Qiao

Lin Qiao is a graduate student in the Department of Environmental Science and Engineering at North China Electric Power University (Bao ding). His advisor is Professor Shuangchen Ma, and his primary research areas include desulphurization wastewater treatment and Preparation of free brick.

Yang Li

Yang Li is a graduate student in the Department of Environmental Science and Engineering at North China Electric Power University (Bao ding). His advisor is Professor Shuangchen Ma, and his primary research area is treatment of desulphurized sludge.

Shuangchen Ma

Shuangchen Ma is a professor of environmental engineering at North China University of Electric Power, China. Mr. Ma major in Coal-fired pollution control, such as desulfurization and denitrification, carbon reduction, desulfurization wastewater treatment, and high-temperature and high-pressure water chemistry. He has published 3 Chinese monographs and more thdan 150 SCI and EI papers.

He has been responsible for 2 National Natural Science Foundation of China, 2 sub-projects of the National Key Research and Development Program, 1 key special project in Hebei Province, and several crosswise tasks. And he has received 5 provincial and ministerial awards and over 20 authorized patents.

Shuangchen Ma is a professor of environmental engineering at North China University of Electric Power, China. Mr. Ma major in Coal-fired pollution control, such as desulfurization and denitrification, carbon reduction, desulfurization wastewater treatment, and high-temperature and high-pressure water chemistry. He has published 3 Chinese monographs and more than 150 SCI and EI papers. He has been responsible for 2 National Natural Science Foundation of China, 2 sub-projects of the National Key Research and Development Program, 1 key special project in Hebei Province, and several crosswise tasks. And he has received 5 provincial and ministerial awards and over 20 authorized patents.