Preprint Article Version 2 This version is not peer-reviewed

Purification Treatment on Polluted River via Combinations of Gravel Contact Oxidation Treatment and Surface Flow Constructed Wetlands—A Case Study in Changhua County, Taiwan

Version 1 : Received: 20 October 2018 / Approved: 22 October 2018 / Online: 22 October 2018 (07:50:42 CEST)
Version 2 : Received: 29 November 2018 / Approved: 2 December 2018 / Online: 2 December 2018 (09:33:29 CET)

How to cite: Chou, C.; Chen, W.; Tsai, Y. Purification Treatment on Polluted River via Combinations of Gravel Contact Oxidation Treatment and Surface Flow Constructed Wetlands—A Case Study in Changhua County, Taiwan. Preprints 2018, 2018100479 (doi: 10.20944/preprints201810.0479.v2). Chou, C.; Chen, W.; Tsai, Y. Purification Treatment on Polluted River via Combinations of Gravel Contact Oxidation Treatment and Surface Flow Constructed Wetlands—A Case Study in Changhua County, Taiwan. Preprints 2018, 2018100479 (doi: 10.20944/preprints201810.0479.v2).

Abstract

Polluted rivers are a primary problem in Changhua County, Taiwan, due to rapid and massive developments in agriculture and industry. In this study, samples consisted of water influent from the Yangzi-Cuo River, Ci-Tong Jiao, Changhua County. Ecology technology, a combination of gravel contact oxidation and surface flow constructed wetlands, was employed to enhance the water quality. Ecology technology is a useful and ordinary process that focuses on original treatment of pollution through chemical, physical, and biological procedures based on the mediums of soil, plant, water, and microorganisms from pure environments. Moreover, this study aimed to minimize the river pollution index (RPI) of the Yangzi-Cuo River by using combinations of gravel contact oxidation and surface flow constructed wetlands. The inflow volume of the water samples in situ was found to be 1534–2261 cubic meters per day (CMD). The pollution in the water sample mostly involved suspended solid (SS), ammoniacal nitrogen (NH3–N), total phosphorus (TP), total nitrogen (TN), and biochemical oxygen demand (BOD), and the values of the above indexes were found to be 10.0–26.7 mg/L, 0.9–14.0 mg/L, 1.2–14.1 mg/L, 11.1–18.2 mg/L, and 0.5–3.6 mg/L, respectively. Efficiencies of pollution elimination in SS, NH3–N, TP, TN, and BOD were found to be 24.2–93.1%, 58.3–86.2%, 5.2–85.0%, 59.4–77.2%, and 46.3–76.4%, correspondingly, after purification treatment via ecology technology. Thus, ecology technology is a valid means of purification treatment for polluted rivers.

Subject Areas

ecology technology; gravel contact oxidation; surface flow constructed wetlands; water quality; river pollution index

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