The performance of six separate percolation areas was intensively monitored to ascertain the attenuation effects of unsaturated subsoils with respect to on-site wastewater effluent: three sites receiving septic tank effluent, the other three sites receiving secondary treated effluent. The development of a biomat across the percolation areas receiving secondary treated effluent was restricted on these sites compared to those sites receiving septic tank effluent and this created significant differences in terms of the potential nitrogen loading to groundwater. The average nitrogen loading per capita at 1.0m depth of unsaturated subsoil equated to 3.9 g total-N/d for the sites receiving secondary treated effluent, compared to 2.1 g total-N/d for the sites receiving septic tank effluent. Relatively high nitrogen loading was, however, found on the septic tank sites discharging effluent into highly permeable subsoil that counteracted any significant denitrification. Phosphorus removal was generally very good on all of the sites although a clear relationship to the soil mineralogy was determined.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.watres.2009.03.024 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Prevalence and factors associated with intestinal parasitosis in children from an urban slum in Brazil: a cross-sectional study.
Rev Paul Pediatr
January 2025
Universidade Federal de Uberlândia, Faculdade de Odontologia, Uberlândia, MG, Brazil.
Objective: This study aimed to estimate the prevalence and investigate the factors associated with intestinal parasitic diseases in children from an urban slum in Brazil.
Methods: A cross-sectional study was conducted in children living in SEWA community, an urban slum located in Araguari, Minas Gerais, Brazil. The prevalence of intestinal parasitosis was determined via stool parasitological examination by spontaneous sedimentation.
Comparative efficacy of anaerobic digestion systems in removing antimicrobial resistance genes from swine wastewater.
J Hazard Mater
December 2024
Technology Innovation Center for Food Safety Surveillance and Detection (Hainan), Sanya Institute of China Agricultural University, Sanya 572025, China; National Key Laboratory of Veterinary Public Health Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China. Electronic address:
Swine farm wastewater is a major reservoir of antimicrobial resistance genes (ARGs). Anaerobic digestion (AD), widely implemented in farms, has been extensively studied for ARG removal. However, a comparative study on ARG removal efficiency across the four principal AD systems - up-flow anaerobic sludge blanket (UASB), continuous stirred tank reactor (CSTR), buried biogas digester (BBD), and septic tank (SPT) - is lacking.
View Article and Find Full Text PDFTHE EFFECTS OF TECHNICAL STEPS USED IN EXISTING SANITATION HELMINTH TEST METHODS ON ASCARIS SUUM EGG RECOVERY FROM PIG FECES.
J Parasitol
December 2024
Water, Sanitation and Hygiene Research and Development Centre, Howard College Campus, University of KwaZulu-Natal, Durban 4041, South Africa.
Many technical aspects are associated with helminth egg isolation and enumeration that affect how efficiently eggs are recovered from samples. This study investigated Ascaris egg recoverability when samples were washed with or without pressure, and from different sample types (water, effluent, ventilated improved pit latrine [VIP], urine diversion dry toilet [UDDT], dried, fatty, and septic tank sludges, and soil) when processed with water, ammonium bicarbonate, and 7X®. We also looked at egg recovery after flotation with zinc sulfate, magnesium sulfate, and sodium nitrate at specific gravities of 1.
View Article and Find Full Text PDFHow do malfunctioning onsite wastewater systems influence water quality? Assessing treatment of nutrient and Escherichia coli in central North Carolina.
J Environ Manage
December 2024
School of Plant and Environmental Sciences, Virginia Tech, 185 Ag-Quad Ln, Blacksburg, VA, 24061, USA.
Onsite wastewater systems (OWSs) can be significant sources of nutrients and E. coli to water resources, potentially resulting in water quality degradation especially during times of malfunction. An OWS is considered malfunctioning when septic tank effluent is discharged into drainfield trenches during periods when there is insufficient separation to groundwater (<30 cm), when wastewater upwells to the surface, or when backup of wastewater into the tank or home occurs.
View Article and Find Full Text PDFEffects of Polyethylene Terephthalate Microplastics on Anaerobic Mono-Digestion and Co-Digestion of Fecal Sludge from Septic Tank.
Molecules
October 2024
Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Xueyuan Road No. 30, Beijing 100083, China.
Anaerobic digestion (AD) is one of the most significant processes for treating fecal sludge. However, a substantial amount of microplastics (MPs) have been identified in septic tanks, and it remains unclear whether they impact the resource treatment of feces. To investigate this, polyethylene terephthalate (PET) was used as an indicator of MPs to study their effect on the anaerobic digestion of fecal sludge (FS).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!