以瓜籽为基础的混凝强化农业废水中磷酸盐和硝酸盐的去除

IF 2.7 Q2 MULTIDISCIPLINARY SCIENCES

Scientific African Pub Date : 2025-04-11 DOI:10.1016/j.sciaf.2025.e02686

Yared Endale , Abreham Bekele Bayu , Zerihun Asmelash Samuel , Seifu Kebede , Eliza Kulbat

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引用次数: 0

摘要

本研究探索了一种利用铝-西瓜籽混凝剂处理废水的方法，这种混凝剂可以帮助缓解吉贝河的营养影响，吉贝河的营养影响受到农业径流的不利影响。试验了明矾与西瓜籽粉的比例，分别为1:3、3:1和1:1。结果表明：以1:3为最佳配比，对磷酸盐、硝酸盐、总溶解固形物、生化需氧量、化学需氧量的去除率分别为98.28%、98.92%、98.27%和95.29%。pH为3，用量为0.4 g/L，接触时间为15分钟，沉淀时间为40分钟时，效率最高。结果表明，西瓜籽混凝剂与商品明矾以1:3的比例混凝是处理高污染吉贝河废水的理想混凝剂。该处理方法不仅提高了主要污染物的去除率，而且是一种环保、低成本的废水处理方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Optimizing Citrullus lanatus seed-based coagulation for enhanced phosphate and nitrate removal from agricultural wastewater

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Optimizing Citrullus lanatus seed-based coagulation for enhanced phosphate and nitrate removal from agricultural wastewater

This present study explores a wastewater treatment process through an alum-watermelon seed coagulant that can help alleviate the Gibe River nutrient impact, which has been adversely affected by agricultural runoff. Various ratios of alum to watermelon seed powder were tested, i.e., 1:3, 3:1, and 1:1. The results indicated that 1:3 was the best ratio and had efficiencies of removal 98.28 % for phosphate, 98.92 % for nitrate, 98.27 % for total dissolved solids, 96.11 % for biochemical oxygen demand, and 95.29 % for chemical oxygen demand. Maximum efficiencies were found at pH 3, 0.4 g/L dosage, 15 minutes contact time, and 40 minutes settling time. The results show that the watermelon seed coagulant blended with commercial alum at a ratio of 1:3 is the ideal blend for wastewater treatment of the highly contaminated Gibe River. The treatment not only improves the removal of the major pollutants but is also an eco-friendly and low-cost wastewater treatment process.

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