Pilot-scale evaluation of semi-passive treatment technologies for the treatment of septage under temperate climate conditions

Gan, Christine; Champagne, Pascale; Hall, Geof

doi:10.1016/j.jenvman.2017.05.079

Cited by 11 publications

(3 citation statements)

References 30 publications

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“…competing technologies by Gan et al (2018). Recently, BioCord™ systems have been shown to be effective in facilitating efficient nitrification under increasing ammonia loading (Aqeel and Liss, 2020) and variable temperature (Skoyles, et al 2020).…”

Section: Methodsmentioning

confidence: 99%

Toward More Efficient and Sustainable Autotrophic Ammonia Removal From Wastewater

Ronan

2024

Preprint

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There is significant need to adapt biological nitrogen removal (BNR) systems to meet the evolving needs of future generations, such that the deleterious impacts of reactive nitrogen pollution can be mitigated in a cost-effective and sustainable manner. The overall goal of this research was therefore to explore autotrophic ammonia removal from a future-facing perspective, in order to generate insights that could inform potential solutions for more stable and sustainable BNR. Three chapters of this dissertation are manuscripts that focus on a particular challenge with respect to the operation of BNR systems, including: i. influent streams with very high ammonia concentrations; ii. greenhouse gas emissions during autotrophic ammonia oxidation; and iii. incomplete ammonia removal caused by alkalinity depletion. Chapter2incorporatedalargeextantofrecentresearchtoassessthelimitationsofconventionalpractices for treating high strength ammonia wastewater and provides a synthesis of emerging approaches for more cost-effective and sustainable treatment. The advantages of exploiting biofilm and aerobic granular sludge technologies were specifically investigated, as was the use of anammox-based processes as beneficial alternatives to conventional nitrification and denitrification. Chapter 3 used novel growth systems to investigate CO2 emissions during autotrophic ammonia oxidation and demonstrated a linear relationship between ammonia removal and gaseous CO2 production. The results provided evidence to suggest that the current approach of excluding bicarbonate-derived CO2 emissions from GHG accounting of BNR processes may lead to an underestimation of the climate change impact of conventional wastewater treatment systems. Chapter 4 investigated the nitrification performance of fixed-film bioreactors with different biomass retention characteristics, to determine the effect of enhanced biomass retention towards improved nitrification during periods of alkalinity induced stress. Although a higher biomass concentration offered the capacity to achieve faster ammonia removal rates in batch mode, the bioreactors exhibited similar performance in continuous-flow mode and the retention of additional nitrifying biomass did not provide any biomass concentration-dependent mechanisms for improved resilience to acidic conditions. Overall, the work described herein represents progress towards a more complete understanding of autotrophic ammonia oxidation as it applies to the stable and sustainable operation of BNR systems.

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Section: Methodsmentioning

confidence: 99%

Toward More Efficient and Sustainable Autotrophic Ammonia Removal From Wastewater

Ronan

2024

Preprint

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“…Major component to be taken in to consideration in the septage treatment nutrient reduction, energy consumption, air cycling and performance. Christine et.al., compared the performance of bio dome , bio card and zebra mussels treatment system and concluded septage temperature has influence on performance of the treatment system [13]. In the constructed wetland for septage treatment the final results were not encouraging and the effluent does not meet standard.…”

Section: Introductionmentioning

confidence: 99%

Current scenario and challenges of septage treatment - A societal perspective

Shyamala,

Gobinath,

Kumar

2023

E3S Web Conf.

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This paper analyzes the problem of septage management related to opportunities and solution. in accordance with present treatment technologies. The scenario in India is about 41 % of septage sludge is disposed in local area without treatment Still some of the individual housing is not connected to suitable public sewage system. The current scenario of FSM in Warangal city is 77 % of the households have proper access to toilet and 23% insanitary toilet and open defecation were found. The samples were collected from the Warangal city and were tested for the characteristics. BOD and COD were very high above 9800 mg/l. As per CPHEEO norms TSS should be less than 15000 mg/l, but it is observed in all the samples it is in the range of 24,800 mg/l to 82,460 mg/l. Currently the treatment such as sludge drying beds, lime treatment, anaerobic baffled reactor, stabilization pond, constructed wetland, composting with solid waste, Mechanical dewatering,. Neglected septage waste ash was tried for several trial run in the mix design and found 20 % to be optimum replacement of septage ash. Strength enhancement is achieved by adding glass chopped strands and workability is improved by Super plasticizer Polycarboxlate ether. Utilization of residue in septage treatment plant in cost effective and ecofriendly way by replacing cement in concrete was tried in the pilot scale study near Warangal and proven to be effective.

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“…Two of the CSTRs were fixed-film systems established using BioCord™, a technology that incorporates a central cord with protruding loops, which served to vastly increase the surface area available for microbial attachment and biofilm formation. Previous studies have evaluated the performance of BioCord™ comprising different polymer materials, 26 during anaerobic digestion, 27 and compared with competing technologies by Gan et al 28 Recently, BioCord™ systems have been shown to be effective in facilitating efficient nitrification under increasing ammonia loading 23 and variable temperature. 29 To date, no studies have investigated whether enhanced biomass retention in fixed-film systems, such as those incorporating BioCord™, could improve nitrification performance under the acidic and potentially inorganic carbon-limited conditions induced by alkalinity depletion.…”

Section: Introductionmentioning

confidence: 99%

Evaluating fixed-film nitrification systems in autotrophic mode: enhanced biomass retention does not improve bioreactor performance during alkalinity induced stress

Ronan

Kroukamp

Liss

et al. 2022

Environ. Sci.: Water Res. Technol.

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Pilot-scale evaluation of semi-passive treatment technologies for the treatment of septage under temperate climate conditions

Cited by 11 publications

References 30 publications

Toward More Efficient and Sustainable Autotrophic Ammonia Removal From Wastewater

Toward More Efficient and Sustainable Autotrophic Ammonia Removal From Wastewater

Current scenario and challenges of septage treatment - A societal perspective

Evaluating fixed-film nitrification systems in autotrophic mode: enhanced biomass retention does not improve bioreactor performance during alkalinity induced stress

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