Department of Civil Engineering, University of Zimbabwe, P. O. Box MP 167, Mt Pleasant, Harare, Zimbabwe.
Environ Monit Assess. 2020 Sep 8;192(10):625. doi: 10.1007/s10661-020-08579-6.
Donnybrook Waste Stabilization Ponds (WSP) are overloaded and water hyacinth plants have infested the ponds. The study assessed the feasibility of integrating the problematic water hyacinth plants into the current treatment process. Grab samples of influent and effluent for each pond were collected between 28 March and 23 April 2019 and the analysis was done following standard APHA methods. Parameters considered include pH, turbidity, TDS, TSS, TN, TP, BOD, and COD. The raw sewage mean pH, turbidity, TDS, TSS, TN, TP, BOD, and COD were 8.08, 580 NTU, 1639 mg/L, 1294 mg/L, 78 mg/L, 8.16 mg/L, 287 mg/L, and 887 mg/L. The mean pH, turbidity, TDS, TSS, TN, TP, BOD, and COD in the effluent from the existing maturation pond, control pilot pond, and water hyacinth pilot pond were 7.7, 7.7, and 7.3; 75, 67, and 47 NTU; 861, 758, and 668 mg/L; 276, 172, and 82 mg/L; 27, 28, and 17 mg/L; 4, 5.28, and 4 mg/L; 114, 52, and 30 mg/L; and 243, 122, and 81 mg/L. It was concluded that the water hyacinth may be integrated into the WSP system to enhance contaminant removal. The water hyacinth in the ponds should be harvested periodically to avoid secondary organic and nutrient loading from dead plants.
唐尼布鲁克污水稳定塘（WSP）已超负荷运行，水葫芦植物已在池塘中滋生。本研究评估了将有问题的水葫芦植物纳入当前处理过程的可行性。于 2019 年 3 月 28 日至 4 月 23 日期间，从每个池塘采集进水和出水的抓取样本，并按照标准 APHA 方法进行分析。所考虑的参数包括 pH 值、浊度、TDS、TSS、TN、TP、BOD 和 COD。原污水的平均 pH 值、浊度、TDS、TSS、TN、TP、BOD 和 COD 分别为 8.08、580 NTU、1639 mg/L、1294 mg/L、78 mg/L、8.16 mg/L、287 mg/L 和 887 mg/L。现有成熟塘、对照试验塘和水葫芦试验塘的出水平均 pH 值、浊度、TDS、TSS、TN、TP、BOD 和 COD 分别为 7.7、7.7 和 7.3；75、67 和 47 NTU；861、758 和 668 mg/L；276、172 和 82 mg/L；27、28 和 17 mg/L；4、5.28 和 4 mg/L；114、52 和 30 mg/L；和 243、122 和 81 mg/L。结论是水葫芦可以被整合到 WSP 系统中以增强污染物的去除。池塘中的水葫芦应定期收割，以避免来自死亡植物的二次有机和营养负荷。
