Scholarlink

<p>The constant demand for domestic wastewater management needs to be incorporated with nutrient retrieval as the&#xa0;septic tank wastewater to promote the material cycle, producing nutrients for agriculture amidst the crisis of&#xa0;fertilizers nowadays. Based on that, this study explores the potential of domestic wastewater, such as human urine&#xa0;(HU) and biogas wastewater (BW), as nutrient sources for agriculture. Corncob biochar was used for adsorption to&#xa0;retrieve nitrogen, phosphorus, and potassium, which were then released into nutrient solutions for soilless cultivation&#xa0;via desorption. Adsorbed nutrients included nitrogen (1200 mg L-1 from HM, 342.42 mg L-1 from BW), phosphorus&#xa0;(242.84 mg L-1 from HM, 104.99 mg L-1 from BW), and potassium (43.74 mg L-1 from HM, 35.04 mg L-1 from BW).&#xa0;From adsorbing HU and BW, two nutrient solutions were produced via desorption and tested on Brassica juncea,&#xa0;which resulted in the growth comparable to those grown with the Hoagland solution. Plants irrigated with human&#xa0;urine showed an average growth index of height (29.65 cm), number of leaves (10.35), leaf length (27.45 cm), and&#xa0;leaf width (13.34 cm) on the fifth day. Nutrients from human urine and biogas wastewater resulted in higher&#xa0;chlorophyll, vitamins, and carbohydrates, and lower levels of nitrate and heavy metals like cadmium and lead. Using&#xa0;human urine and biogas wastewater as nutrient sources proved to be effective and economically efficient due to&#xa0;reduced nutrient preparation costs. This approach presents promising directions for advanced organic agriculture&#xa0;using wastewater, though further research is necessary to understand the specific nutritional requirements and&#xa0;applicability to various plants.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Transforming Domestic Wastewater into Hydroponic Nutrients Using Corncob-Derived Biochar Adsorption

  • 期刊论文

  • 发表日期：

    2025年3月11日

查看全文
  • Quang Van Nguyen,
  • Khai Manh Nguyen,
  • Hung The Nguyen,
  • Hung Van Hoang,
  • Tuan Dinh Duong,
  • Mai Thi Ngoc Dong,
  • Hang Thi Minh Tran

摘要

The constant demand for domestic wastewater management needs to be incorporated with nutrient retrieval as the septic tank wastewater to promote the material cycle, producing nutrients for agriculture amidst the crisis of fertilizers nowadays. Based on that, this study explores the potential of domestic wastewater, such as human urine (HU) and biogas wastewater (BW), as nutrient sources for agriculture. Corncob biochar was used for adsorption to retrieve nitrogen, phosphorus, and potassium, which were then released into nutrient solutions for soilless cultivation via desorption. Adsorbed nutrients included nitrogen (1200 mg L-1 from HM, 342.42 mg L-1 from BW), phosphorus (242.84 mg L-1 from HM, 104.99 mg L-1 from BW), and potassium (43.74 mg L-1 from HM, 35.04 mg L-1 from BW). From adsorbing HU and BW, two nutrient solutions were produced via desorption and tested on Brassica juncea, which resulted in the growth comparable to those grown with the Hoagland solution. Plants irrigated with human urine showed an average growth index of height (29.65 cm), number of leaves (10.35), leaf length (27.45 cm), and leaf width (13.34 cm) on the fifth day. Nutrients from human urine and biogas wastewater resulted in higher chlorophyll, vitamins, and carbohydrates, and lower levels of nitrate and heavy metals like cadmium and lead. Using human urine and biogas wastewater as nutrient sources proved to be effective and economically efficient due to reduced nutrient preparation costs. This approach presents promising directions for advanced organic agriculture using wastewater, though further research is necessary to understand the specific nutritional requirements and applicability to various plants.

Graphical Abstract