An evaluation of the sustainability of onsite wastewater treatment systems for nutrient management

Diaz-Elsayed, Nancy; Xu, Xiaofan; Balaguer-Barbosa, Maraida; Zhang, Qiong

doi:10.1016/j.watres.2017.05.005

Cited by 35 publications

(22 citation statements)

References 21 publications

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“…This is attributed to the numerous nitrifying bacteria in the biofilm in the attached growth systems compared to those in the As a result of increased interest in nutrient concentrations in wastewater effluent, the monitoring included both nitrogen and phosphorous constituents. Nitrate is a very important parameter that indicates the efficiency of a treatment system to remove nitrogenous compounds from wastewater [30]. The results of nitrate (NO 3 -N) concentration for both systems under a hydraulic loading of 1.2 m 3 /d over the entire investigation period are shown in Figure 4.…”

Section: Resultsmentioning

confidence: 99%

Modified Septic Tank: Innovative Onsite Wastewater Treatment System

Abbassi

Abu-Harb

Ammary

et al. 2018

Water

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This research documents two innovative designs of septic tanks used for onsite wastewater treatment. The designs were implemented and tested as part of a research project focused on innovative decentralized wastewater treatment solutions. The modified septic tanks were tested at different hydraulic loading rates for sufficient periods to effectively evaluate their performance. The two systems were designed with successive anaerobic and aerobic chambers and were differentiated between attached and suspended growth. The systems were operated at detention times of 4.3, 3.2, and 2.6 days. High removal of organic load was achieved under all loading criteria in both systems. Effluent BOD 5 concentration at lower and higher loading rates were found to be less than 15 and 25 mg/L, respectively, representing a removal rate of more than 95%. Nitrogen was also removed but at a lower rate. The highest TN removal was achieved (59%) in the attached growth system at the lowest loading rate. Although two logs of E. coli removal (99%) were achieved in all systems, E. coli numbers were high enough to necessitate further tertiary treatment. The modified septic tanks proved to be a cost-effective technology with low energy and O&M requirements.

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Section: Resultsmentioning

confidence: 99%

Modified Septic Tank: Innovative Onsite Wastewater Treatment System

Abbassi

Abu-Harb

Ammary

et al. 2018

Water

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“…Several studies have discussed and proposed indicators based on sustainability principles to evaluate wastewater treatment systems based on literature data. 4,10,11 Furthermore, life cycle approaches, [12][13][14][15] environmental systems analyses 16,17 and sustainability assessments 18,19 have been applied. Due to the large number of small-scale and on-site sanitation technologies that currently exist, 20 and despite the criteria and indicators already suggested in the scientific literature, 8,10,11 there is a lack of application of such information in a knowledge-based decision support context for OSSs that also incorporate the stakeholders' views to handle the trade-offs between indicators.…”

Section: Introductionmentioning

confidence: 99%

Assessing the sustainability of on-site sanitation systems using multi-criteria analysis

Vidal

Hedström

Barraud

et al. 2019

Environ. Sci.: Water Res. Technol.

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“…In addition to the assessment goal, the influence of geographical location should also be taken into consideration. Diaz-Elsayed, Xu, Balaguer-Barbosa, and Zhang (2017) evaluated the environmental impacts of onsite wastewater treatment systems for nutrient management operating in different soil and temperature conditions. They found that marine eutrophication potential varies significantly for three different onsite systems that consisted of (i) concrete septic tank and aggregate drainfield, (ii) plastic septic tank and the multipipe system drainfield, and (iii) a biological nitrogen reduction system and multipipe drainfield.…”

Section: Boundary Of Evaluationmentioning

confidence: 99%

Nutrient control in water bodies: A systems approach

et al. 2020

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Nutrient pollution is considered a wicked problem because of its many significant economic, social, and environmental impacts that are caused by multiple pollutants originating from a variety of sources and pathways that exist across different temporal and spatial scales. Further adding to the difficulty in managing nutrient pollution is that it is a global, rural, and urban problem. A systems approach can improve nutrient management by incorporating technological, environmental, and societal considerations. This approach can consider valuation of monetized and nonmonetized cobenefits and the inherent consequences that make up a nutrient management program.In this introduction to a special collection of papers on nutrient pollution, we describe several systems frameworks that can be used to support nutrient management and evaluation of system performance as it relates to impacts, then highlight several attributes and barriers of nutrient management that point to the need for a systems framework, and conclude with thoughts on implementing systems approaches to nutrient management with effective community engagement and use of new technologies. This special collection presents results from a USEPA Science to Achieve Results (STAR) initiative to advance solutions to nutrient pollution through innovative and sustainable research and demonstration projects for nutrient management based on a systems approach. These studies evaluate several promising nutrient control technologies for stormwater or domestic wastewater, investigate the effects of agricultural conservation practices and stream restoration strategies on nutrient loads, and discuss several challenges and opportunities-social, policy, institutional, and financial considerationsthat can accelerate adoption of reliable technologies to achieve system-level outcomes.

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An evaluation of the sustainability of onsite wastewater treatment systems for nutrient management

Cited by 35 publications

References 21 publications

Modified Septic Tank: Innovative Onsite Wastewater Treatment System

Modified Septic Tank: Innovative Onsite Wastewater Treatment System

Assessing the sustainability of on-site sanitation systems using multi-criteria analysis

Nutrient control in water bodies: A systems approach

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