Purification Performance of Filtration Process for Pig Slurry Using Marine Sands, Silty Loam Soils, Fly Ash and Zeolite

被引:5
作者
El Bied, Oumaima [1 ,2 ]
Garcia-Valero, Amalia [1 ]
Fechtali, Taoufiq [2 ]
Faz, Angel [1 ]
Acosta, Jose A. [1 ]
机构
[1] Univ Politecn Cartagena, Dept Ingn Agron, Super Ingn Agron, Management & Reclamat Soil & Water Res Grp, Paseo Alfonso 13 48, Murcia 30203, Spain
[2] Hassan II Univ, Fac Sci & Technol, Dept Biosci, Casablanca 28806, Morocco
来源
AGRONOMY-BASEL | 2021年 / 11卷 / 08期
关键词
pig slurry; pig slurry filtration; multi-material media; heavy metals removal; physicochemical properties; cost-efficient wastewater treatment; micronutrients; macronutrients; constructed wetlands; WASTE-WATER TREATMENT; CONSTRUCTED WETLANDS; REMOVAL; NITROGEN; CONDUCTIVITY; ADSORPTION; EFFICIENCY; ORGANICS; SYSTEM; ACIDS;
D O I
10.3390/agronomy11081608
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Filtration is a simple ecological process for the treatment of effluents. This research examined the physicochemical properties of micronutrients, macronutrients, and heavy metals (HM) removed after the slow filtration of pig slurry (PS) through multiple media: sands, silt loam soils, fly ash, and zeolite. The objective was to find a new layer that can be added to our constructed wetland (CW) to improve its efficiency and study how the slurry reacts to these natural materials. The filtration achieved an approximate removal rate of 99.99% for total suspended solids (TSS) and nitrogen and 61, 94, 72, and 97%, respectively, for electrical conductivity (EC), turbidity, chemical oxygen demand (COD), and five-day biological oxygen demand (BOD5). The two sands, soil 1, and zeolite, had a macronutrient reduction median of 60%, whereas soil 2, 3, 4, and fly ash released macronutrients such as Na, Ca, and Mg. All the media achieved nearly 99.99% micronutrient removal for Fe and Zn. The Cu removal rate was over 86% except for sand 1 and 2 and soil 1, which reduced it to only 46%; the overall Mn removal rate was more than 80% except for soil 3 and soil 4, where it was only 9%. Zeolite had a 99.99% removal capacity for HM as opposed to sand 2, soil 4, and fly ash, which released some HMs (Ni, Cu). This inexpensive and abundant media filtration process is sound technically and financially sound and seems to be an ideal cost-efficient treatment for pig slurry.
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页数:15
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