The Combination of Activated Sludge and a Constructed Wetland for Treating Soybean Wastewater

Q3 Environmental Science

Applied Environmental Research Pub Date : 2023-06-29 DOI:10.35762/aer.2023011

T. N. Minh, N. Thi, Hoan Le Thi-Hai, Thanh Pham Van

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Abstract

Soybean is a nutritious and popular material in the Vietnamese food industry. Soybean processing wastewater contains a significant amount of organic compounds, which have a negative impact on aquatic life due to light penetration and oxygen consumption limitations. Therefore, this study was carried out to determine whether the combination of activated sludge and a constructed wetland using VA06 grass could be effective in treating soybean wastewater. Various amounts of activated sludge were investigated. To be specific, a 20% additional sludge percentage resulted in the shortest treatment time for chemical oxygen demand (COD), total nitrogen (TN), and phosphorus (TP). Additionally, the treatment time was gradually increased by adding smaller volumes of sludge (5% and 10%). Furthermore, the experimental model combining activated sludge and the constructed wetland showed a high treatment efficiency of 97.29% for COD removal, 67.52% for TN removal, and 91.61% for TP removal. Finally, the growth of VA06 grass rose from 41 cm to 80 cm, demonstrating that VA06 grass was adaptable and could be applied to treat soybean wastewater.

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活性污泥与人工湿地联合处理大豆废水的研究

大豆是越南食品工业中营养丰富、受欢迎的原料。大豆加工废水中含有大量的有机化合物，由于光穿透和氧气消耗的限制，对水生生物产生了负面影响。因此，本研究旨在确定活性污泥与使用VA06草的人工湿地组合处理大豆废水是否有效。研究了不同数量的活性污泥。具体而言，20%的额外污泥百分比导致化学需氧量(COD)，总氮(TN)和磷(TP)的处理时间最短。此外，通过添加较小体积的污泥(5%和10%)，处理时间逐渐延长。此外，活性污泥与人工湿地相结合的实验模型显示，COD去除率为97.29%，TN去除率为67.52%，TP去除率为91.61%。最后，VA06草的生长从41 cm上升到80 cm，表明VA06草具有很强的适应性，可以应用于处理大豆废水。

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

Applied Environmental Research Environmental Science-Environmental Science (all)

CiteScore

2.00

自引率

0.00%

发文量