Assessment of growth ability and removal efficiency of the Hydrilla (Hydrilla verticillata) in wastewater

IF 2.2 Q1 MARINE & FRESHWATER BIOLOGY

Egyptian Journal of Aquatic Research Pub Date : 2022-09-01 DOI:10.1016/j.ejar.2021.11.004

Chonyitree Sangwijit , Nitikorn Phoosuwan , Prapagon Sangwijit , Watcharapong Thakong , Laksanawadee Saikhao

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引用次数: 0

Abstract

The present quasi-experimental research investigated the growth ability and removal efficiency of Hydrilla verticillata in freshwater from Nong Han Lake (NHL), domestic wastewater from constructed wetlands (CW) and wastewater from university canteen wastewater (UCW) in Sakon Nakhon, a north-east province in Thailand. The growth rate was measured by evaluating the fresh mass of H. verticillata and comparing the removal efficiency of the biochemical oxygen demand (BOD), the chemical oxygen demand (COD) and phosphate at the hydraulic retention time on days 7, 14, 21 and 28. The efficiency of BOD removal of H. verticillata in UCW, NHL and CW was 26, 80 and 84%, respectively, whereas the COD removal efficiency was 25, 72 and 63%, respectively, and that of phosphate was 6, 44 and 87%, respectively. No difference was found in growth rates between H. verticillata from NHL and CW. Further, CW provided a good growth rate of H. verticillata, and the domestic wastewater discharges could provide a rapid growth of H. verticillata. Finally, H. verticillata might be used in aquatic ecosystems.

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水螅(Hydrilla verticillata)在废水中的生长能力和去除率评价

采用准实验研究方法，对泰国东北部沙贡那空省农汉湖淡水(NHL)、人工湿地生活污水(CW)和大学食堂污水(UCW)中的水蛭(Hydrilla verticillata)的生长能力和去除率进行了研究。在第7、14、21和28天的水力停留时间内，通过评价水蛭的新鲜质量和比较水蛭对生化需氧量(BOD)、化学需氧量(COD)和磷酸盐的去除率来测定水蛭的生长速度。在UCW、NHL和CW中，H. verticillata对BOD的去除率分别为26、80和84%，对COD的去除率分别为25、72和63%，对磷酸盐的去除率分别为6、44和87%。在NHL和CW两种菌株的生长速率上没有发现差异。此外，连续水处理可为H. verticillata提供良好的生长条件，而生活污水排放可为H. verticillata提供快速生长条件。最后，水蛭在水生生态系统中也有应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Egyptian Journal of Aquatic Research MARINE & FRESHWATER BIOLOGY-

CiteScore

6.80

自引率

5.70%

发文量

审稿时长

39 days

期刊介绍： The Egyptian Journal of Aquatic Research is published by the National Institute of Oceanography & Fisheries. The Journal isdevoted to the publication of original papers and reviews in all branches of aquatic sciences (Oceanography, Limnology, Fisheries,Aquaculture and environmental sciences)