Role of the pressure transmitting medium on the pressure effects in DWCNTs

Anis, Badawi; Börrnert, Felix; Rümmeli, Mark H.; Kuntscher, C. A.

doi:10.1002/pssb.201300062

Cited by 16 publications

(44 citation statements)

References 39 publications

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“…In order to allow aggregation of DER, policy should assist to lower those barriers and arrange compensation mechanisms between aggregators and electricity suppliers [90]. Further developments could allow for flexibility trading not only at central markets, but also at local levels in which locational needs for flexibility could reduce network capacity problems [91]. Questions that remain are weather there should be one central aggregator or multiple aggregators for providing such services [26].…”

Section: Discussionmentioning

confidence: 99%

Managing electric flexibility from Distributed Energy Resources: A review of incentives for market design

Eid

Codani

Pérez

et al. 2016

Renewable and Sustainable Energy Reviews

355

163

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a b s t r a c tIn many electric systems worldwide the penetration of Distributed Energy Resources (DER) at the distribution levels is increasing. This penetration brings in different challenges for electricity system management; however if the flexibility of those DER is well managed opportunities arise for coordination. At high voltage levels under responsibility of the system operator, trading mechanisms like contracts for ancillary services and balancing markets provide opportunities for economic efficient supply of system flexibility services. In a situation with smart metering and real-time management of distribution networks, similar arrangements could be enabled for medium-and low-voltage levels. This paper presents a review and classification of existing DER as flexibility providers and a breakdown of trading platforms for DER flexibility in electricity markets.

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Section: Discussionmentioning

confidence: 99%

Managing electric flexibility from Distributed Energy Resources: A review of incentives for market design

Eid

Codani

Pérez

et al. 2016

Renewable and Sustainable Energy Reviews

355

163

View full text Add to dashboard Cite

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“…Water quality is essential in aquaponic systems because all organisms in the system depend on good water quality for optimum growth (Somerville et al 2014). Therefore, water quality parameters should be maintained within tolerable limits for optimal growth of fish, bacteria and plants in an efficient aquaponic system (Goddek et al 2016).…”

Section: Discussionmentioning

confidence: 99%

“…Microbial activities, as well as nutrient absorption by plants in the hydroponic subsystem, reduce nutrient concentration in the culture water, which in turn improves the environmental conditions for fish production (Boxman et al 2017;Effendi et al 2017). The integration of fish and vegetable production increases the diversity and yield of multiple products and water is reused through the process (Somerville et al 2014). Therefore, aquaponic systems can meet the increasing demand for food and at the same time reduce negative impacts on the environment (Tyson et al 2011), hence the need to embrace aquaponic systems to get the most out of the available land and water resources.…”

Section: Introductionmentioning

confidence: 99%

“…More than 150 different herbs, small trees and vegetables have been cultivated successfully in experimental, domestic and commercial aquaponic systems. Most operations prefer leafy greens and herbs such as lettuce, salad rocket, basil, mint, parsley, coriander, chives, watercress, pak choi and chard because they are well adapted to aquaponics, they grow faster and they can be used for culinary and aromatic purposes that have low to medium nutritional requirements (Wahyuningsih et al 2015;Somerville et al 2014;Rakocy and Masser 2006), whereas fruiting plants including tomatoes, pepper and cucumbers have a higher nutritional demand and perform better in well-established systems with adequate fish stocks (Somerville et al 2014). However, the selection of plant species depends on the stocking density of fish tanks and the subsequent nutrient concentrations of aquaculture wastewater (Diver 2006).…”

Section: Introductionmentioning

confidence: 99%

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Efficiency of pumpkin (Cucurbita pepo), sweet wormwood (Artemisia annua) and amaranth (Amaranthus dubius) in removing nutrients from a smallscale recirculating aquaponic system

et al. 2019

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In aquaponic systems, plants absorb dissolved nutrients from aquaculture wastewater for their growth. The removal of nutrients allows reuse of water and minimises wastewater discharge to the surrounding environment. This study evaluated the relative nutrient removal efficiencies of three plant species and the performance of Nile tilapia (Oreochromis niloticus) in a small-scale aquaponic system. Three aquaponic systems were assigned as treatments PU (pumpkin), SW (sweet wormwood) and AM (amaranth). Physical-chemical water quality parameters were measured in the fish tanks as well as hydroponic inlets and outlets. Fish sampling was done every 2 weeks for 60 days. Results showed significantly (p < 0.05) lower nutrient concentrations in the hydroponic outlets than the inlets. There was no significant difference in nutrient removal efficiency of the plants (p > 0.05) for all the tested nutrients except for phosphorus. Phosphorus removal was substantially high in PU (75.5 ± 16.8%) than SW (47.36 ± 14.5%) and AM (40.72 ± 13.2%). In addition, the SW system had better (p < 0.05) relative growth rate (0.06 ± 0.00) than that of PU (0.05 ± 0.00) and AM (0.05 ± 0.00). Nitrogen and phosphorus content in plant tissues was significantly high (p < 0.05) in SW and PU plants respectively. Water quality parameters had a significant influence on the growth of fish (p < 0.05). The growth of fish was not different (p > 0.05) in the three treatments. The findings indicate that the tested plants can reduce nutrients in aquaculture discharge water.

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“…1). The Klein-Jukskei River forms part of the river network that flows into the Hartbeespoort Dam (Dudula, 2007). Sites one to six were all located on the two selected tributaries while sites seven and eight were on the main Klein Jukskei River, upstream and downstream from the points where the tributaries entered the river.…”

Section: Study Sitementioning

confidence: 99%

The impact of various land uses on the microbial and physicochemical quality of surface water bodies in developing countries: Prioritisation of water resources management areas

Hoven

Ubomba-Jaswa

Merwe

et al. 2017

Environmental Nanotechnology, Monitoring & Management

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To protect water resources, the WHO recommends assessing land use influence on water quality, taking into consideration residential development and waste disposal amongst others. Thus, we investigated the impact of unconstructed plots, an informal settlement, an urban residential area, and an industrial area on the microbiological and physicochemical quality of two main tributaries within the Klein Jukskei catchment, Johannesburg, South Africa, to identify areas where immediate resource management strategies were needed. Water samples collected from the tributaries' sources and upstream and downstream from each land use type (Winter and Spring) were analysed for E. coli (indicator organism), using the Colilert ® 18 system. Physicochemical parameters (Temperature, pH, dissolved oxygen, electrical conductivity, turbidity and total dissolved solids) were measured using multiparameter instruments. The tributaries' sources had the lowest E. coli counts (Sandspruit-0.74; North Ridingspruit-1.18 log10 MPN/100 mL) during the study. After flowing through the various land uses, mean E. coli counts reached 5.98 (Sandspruit) and 4.85 log10 MPN/100 mL (North Ridingspruit). E. coli values and all physicochemical parameters (but for pH) downstream from most of the land uses did not meet the South African drinking water quality guidelines. The informal settlement had the most negative impact on the microbial and physicochemical quality of the water within the tributaries. Thus, providing informal settlements with appropriate sanitation facilities is likely to prevent pollution of the water bodies. Protection of the sources should also be implemented 2 while industrial wastes need to be monitored for conformity with water quality guidelines before discharge.

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Role of the pressure transmitting medium on the pressure effects in DWCNTs

Cited by 16 publications

References 39 publications

Managing electric flexibility from Distributed Energy Resources: A review of incentives for market design

Managing electric flexibility from Distributed Energy Resources: A review of incentives for market design

Efficiency of pumpkin (Cucurbita pepo), sweet wormwood (Artemisia annua) and amaranth (Amaranthus dubius) in removing nutrients from a smallscale recirculating aquaponic system

The impact of various land uses on the microbial and physicochemical quality of surface water bodies in developing countries: Prioritisation of water resources management areas

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