Sewage-treatment under substantial load variations in winter tourism areas – a full case study

Matsché, N.; Gamperer, T.; Dum, M.

doi:10.2166/wst.2004.0441

Cited by 5 publications

(4 citation statements)

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“…communities described in this study, considering that the hydraulic connection of the two systems creates a continuous crossinoculation, and that differences in community structure are pronounced and consistent over time. This raises the question as to how community structure and function of high-rate and low-rate systems are affected when a substantial amount of biomass is continuously transferred from one system to another, as is the case in the Hybrid ® process (Winkler et al, 2004). To exploit the full capacity of a two-stage STP, one may argue that it is essential that both stages have distinctly different microbial communities to be better adapted to the specific purpose of each stage.…”

Section: Resultsmentioning

confidence: 99%

High-rate activated sludge communities have a distinctly different structure compared to low-rate sludge communities, and are less sensitive towards environmental and operational variables

et al. 2016

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High-rate activated sludge processes allow for the recovery of organics and energy from wastewaters. These systems are operated at a short sludge retention time and high sludge-specific loading rates, which results in a higher sludge yield and better digestibility than conventional, low-rate activated sludge. Little is known about the microbial ecology of high-rate systems. In this work, we address the need for a fundamental understanding of how high-rate microbial communities differ from low-rate communities. We investigated the high-rate and low-rate communities in a sewage treatment plant in relation to environmental and operational variables over a period of ten months. We demonstrated that (1) high-rate and low-rate communities are distinctly different in terms of richness, evenness and composition, (2) high-rate community dynamics are more variable and less shaped by deterministic factors compared to low-rate communities, (3) sub-communities of continuously core and transitional members are more shaped by deterministic factors than the continuously rare members, both in high-rate and low-rate communities, and (4) high-rate community members showed a co-occurrence pattern similar to that of low-rate community members, but were less likely to be correlated to environmental and operational variables. These findings provide a basis for further optimization of high-rate systems, in order to facilitate resource recovery from wastewater.

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Section: Resultsmentioning

confidence: 99%

High-rate activated sludge communities have a distinctly different structure compared to low-rate sludge communities, and are less sensitive towards environmental and operational variables

et al. 2016

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“…The first stage of the Hybrid plant is highly loaded and usually characterized with a very low sludge volume index (SVI). Previous experiences have shown that properties of sludge from the high loaded stage essentially determine the properties of second stage sludge and that the SVI of the second stage is low, as well (Winkler et al, 2004). In case of WWTP3, the SVI was actually higher than expected and ranged up to 200 ml/g.…”

Section: Sludge Characteristicsmentioning

confidence: 82%

Enlargement of Hardn-Hofsteig treatment plant from 170,000 PE to 270,000 PE in the existing footprint

Radetic¹,

Gasser²,

Matsché

2016

Water Practice and Technology

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With the continuous increase in environmental requirements and regulations for wastewater treatment a lot of wastewater treatment plants in Austria had to be extended. Extension of the plant requires in general an additional area, which is not always available. This study shows the extension of the WWTP Hard Hofsteig and doubling its capacity by using the Hybrid concept, which is a special two stage activated sludge process for extensive nutrient removal. The plant was extended from 170,000 PE to 270,000 PE without changing the footprint of the plant and the extension costs could be kept very low. Operational data shows that by operating the plant in the two stage Hybrid mode the energy balance of the plant can be improved.

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“…Kampman et al (2012) developed a reactor in which methane is used as electron donor for denitrification. Winkler, et al (2004) provided a full study case dealing sudden sewage-load increases in one of Austria's largest skiing resorts. On the other hand, selecting efficiency bacterium in low temperature in also a hot spot (Gratia 2009;Woo 2012).…”

Section: Introductionmentioning

confidence: 99%

Experimental Research on Insulation Technology by Plastic Greenhouse in Sewage Treatment Plant of Northeast Region

Zhan¹,

Deng²,

Liu³

et al. 2017

JRST

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ABSTRACT:The insulation technology by plastic greenhouse was studied in northeast area. The numerical simulations and experiments were conducted in this paper. The temperature distribution in the greenhouse and flow characteristics were analyzed. The results showed that the greenhouse insulation played a good role in thermal insulation effect, rather than absorbed solar radiation heat. The temperature fluctuation reduced because of the insulation of greenhouse in winter. a stable environment was contributed to the high effective operation of the sewage treatment. The effect of wedge-shaped greenhouse was better than that of arch-shaped one when the temperature of sewage in the outlet was only considered, for the average temperature of air in the greenhouse rose 3-5°C, the temperature of sewage in the outlet rose 5.5-8.5°C. Thus, it was an effective measure to fill the recycled waste heat into the greenhouse in northeast region.

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Sewage-treatment under substantial load variations in winter tourism areas – a full case study

Cited by 5 publications

References 0 publications

High-rate activated sludge communities have a distinctly different structure compared to low-rate sludge communities, and are less sensitive towards environmental and operational variables

High-rate activated sludge communities have a distinctly different structure compared to low-rate sludge communities, and are less sensitive towards environmental and operational variables

Enlargement of Hardn-Hofsteig treatment plant from 170,000 PE to 270,000 PE in the existing footprint

Experimental Research on Insulation Technology by Plastic Greenhouse in Sewage Treatment Plant of Northeast Region

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