The Effect of Domestic Sewage Treatment on Islands Using Ecological Treatment Processes: A Case Study of Haimen Island, Fujian Province

Yuanmin Sun, Kunxian Tang (), Hui Song, Degang Jiang, Shan Chen, Wulin Tu, Luchun Cai, Haiping Huang and Fei Zhang
Additional contact information
Yuanmin Sun: Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
Kunxian Tang: Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
Hui Song: Institute of Marine Science and Technology, Shandong University, Qingdao 266237, China
Degang Jiang: Island Research Center, Ministry of Natural Resources, Pingtan 350400, China
Shan Chen: Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
Wulin Tu: Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
Luchun Cai: Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
Haiping Huang: Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
Fei Zhang: Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China

IJERPH, 2022, vol. 19, issue 23, 1-12

Abstract: Islands are characterized by a lack of land and freshwater resources, public finances, and technical personnel. As a result, domestic sewage may not be effectively treated, which can lead to major pollution on islands and in the surrounding sea areas. In this study, a pilot treatment of domestic sewage was conducted using an ecological treatment process (i.e., a constructed wetland and ecological pond) in an abandoned pond located on Haimen Island, Fujian Province, China. The pollutant indicators were monitored to analyze this treatment method at different treatment stages. The results showed that the combination of multiple ecological treatment processes had favorable treatment effects on various pollutants in the sewage. The treatment rates of the chemical oxygen demand (COD Cr ) and suspended solids (SS) surpassed 88%. The treatment rate of the biochemical oxygen demand (BOD 5 ), ammonia nitrogen (NH 3 -N), total nitrogen (TN), total phosphorus (TP), and fecal coliform surpassed 93%, and all the indicators met or were close to the level I B emission standards for urban sewage treatment plants. Different treatment stages have different treatment effects on different pollutants. The constructed wetland played an important role in sewage treatment through plant absorption, substrate adsorption, sedimentation, and microbial decomposition, particularly for the TP, COD Cr , and BOD 5 . In contrast, algal photosynthesis in the ecological pond produced a large amount of dissolved oxygen, and the treatment effect was highest for the TN and NH 3 -N. The treatment effects on the fecal coliform in the constructed wetland and ecological pond were very significant. Ecological treatment processes based on the combination of a constructed wetland and ecological pond have favorable treatment effects, low construction and maintenance costs, and pollution-free conditions, which are suitable for application in island areas.

Keywords: island; sewage treatment; constructed wetland; ecological pond (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1660-4601/19/23/15440/pdf (application/pdf)
https://www.mdpi.com/1660-4601/19/23/15440/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jijerp:v:19:y:2022:i:23:p:15440-:d:980223

Access Statistics for this article

IJERPH is currently edited by Ms. Jenna Liu

More articles in IJERPH from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().