Hampered effluent accumulation process: Phosphorus management and societal structure

Günther, Folke

doi:10.1016/s0921-8009(96)00100-0

Cited by 35 publications

(24 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Further, leaching of phosphorus in some areas suggests that the city may be both a phosphorus sink on a regional scale and a phosphorus source locally. Other studies of phosphorus budgets show similar evidence of large storage levels and sink-source shifts (241).…”

Section: Urban Metabolismmentioning

confidence: 65%

ENERGY ANDMATERIALFLOWTHROUGH THEURBANECOSYSTEM

Decker

Elliott

Smith

et al. 2000

Annu. Rev. Energy. Environ.

338

226

View full text Add to dashboard Cite

Key Words megacity biogeochemistry, city succession, industrial metabolism, air pollution, system simulations s Abstract This paper reviews the available data and models on energy and material flows through the world's 25 largest cities. Throughput is categorized as stored, transformed, or passive for the major flow modes. The aggregate, fuel, food, water, and air cycles are all examined. Emphasis is placed on atmospheric pathways because the data are abundant. Relevant models of urban energy and material flows, demography, and atmospheric chemistry are discussed. Earth system-level loops from cities to neighboring ecosystems are identified. Megacities are somewhat independent of their immediate environment for food, fuel, and aggregate inputs, but all are constrained by their regional environment for supplying water and absorbing wastes. We elaborate on analogies with biological metabolism and ecosystem succession as useful conceptual frameworks for addressing urban ecological problems. We conclude that whereas data are numerous for some individual cities, cross-cutting compilations are lacking in biogeochemical analysis and modeling. Synthesis of the existing information will be a crucial first step. Cross-cutting field research and integrated, multidisciplinary simulations will be necessary.

show abstract

Section: Urban Metabolismmentioning

confidence: 65%

ENERGY ANDMATERIALFLOWTHROUGH THEURBANECOSYSTEM

Decker

Elliott

Smith

et al. 2000

Annu. Rev. Energy. Environ.

338

226

View full text Add to dashboard Cite

show abstract

“…Such initiatives have mainly been triggered by concerns about nutrient leakage to waterways causing eutrophication. However, much agricultural land is still subject to an over-application of phosphorus, resulting in unnecessary accumulation in soils in addition to runoff to water bodies (Steen, 1998;Gunther, 1997). Indeed, only 15-30% of applied phosphorus fertilizer is actually taken up by harvested crops 10 (FAO, 2006).…”

Section: Supply-sidementioning

confidence: 99%

The story of phosphorus: Global food security and food for thought

Cordell

Drangert

White

2009

Global Environmental Change

4,218

2,534

View full text Add to dashboard Cite

“…SS was collected from the Bjergmarken Wastewater Treatment Plant (WWTP) (Roskilde, Denmark). The WWTP process included biological and chemical precipitation of P [including some addition of FeCl(SO 4 ), AlCl 3 and AlSO 4 ]. The sludge was transferred to a thermophilic biogas digester at the plant and processed with 15 days' hydraulic retention time.…”

Section: Methodsmentioning

confidence: 99%

“…Most mineral P fertilisers are derived from rock phosphate, which is a non-renewable resource becoming increasingly depleted and consequently will also eventually become scarce and expensive [2]. The most common mineral fertiliser is triple superphosphate (TSP) derived by acidification of rock P. An alternative to mineral P fertilisers is the waste product sewage sludge, which represents an important P source with around 2-4 % of P depending on the wastewater source and the treatment methods [3], around 70-90 % of the total P is inorganic P and considered potentially equivalent to inorganic fertilisers [4,5]. Depending on the chemicals used to precipitate P and the amount used in the wastewater treatment facilities, the immediate availability of P to plants from sewage sludge can be very different [6].…”

Section: Introductionmentioning

confidence: 99%

The effect of Penicillium bilaii on wheat growth and phosphorus uptake as affected by soil pH, soil P and application of sewage sludge

Sánchez-Esteva

Gómez‐Muñoz

Jensen

et al. 2016

Chem. Biol. Technol. Agric.

View full text Add to dashboard Cite

Background: Penicillium bilaii may enhance P availability to plants, since it has been shown to increase plant growth and P uptake. There is currently increasing interest in using microorganisms to promote P mobilisation from organic P sources. An investigation was conducted to determine the effects of P. bilaii on P uptake and growth of wheat in the presence and absence of sewage sludge. Two soils differing in P contents and pH were used, as it was hypothesised that these affect the efficiency of P mobilisation.Methods: A pot experiment, in which wheat was grown for 35 days in a moderately acidic soil of low P status and a calcareous soil of moderate P status, was conducted. A full factorial design was used with two non-sterilised soils, three amendments [control, sewage sludge and triple superphosphate (TSP)] and two P. bilaii treatments (with/ without). Shoot and root length, biomass and nutrient contents were analysed in plant, whereas soil samples were analysed for water-extractable P and soil pH. Results:The shoot length and root biomass of wheat were significantly higher when sewage sludge was applied in combination with P. bilaii seed inoculation, in the moderately acidic soil. In contrast, shoot length and biomass and root biomass were higher with P. bilaii compared to the control, but no synergistic effects of P. bilaii and the organic P source were observed in the calcareous soil. A systematic, but not significant increase in total P uptake was found for all treatments inoculated with P. bilaii and for both soils, with the control of the low fertility moderately acidic soil being a notable exception. Conclusions:Sewage sludge was seen to be an efficient P source, on par with TSP in the moderately acidic soil. In the calcareous soil, the P. bilaii treatments without added P fertilisers had the greatest effect, with both root and shoot biomass increasing significantly.

show abstract

Hampered effluent accumulation process: Phosphorus management and societal structure

Cited by 35 publications

References 3 publications

ENERGY ANDMATERIALFLOWTHROUGH THEURBANECOSYSTEM

ENERGY ANDMATERIALFLOWTHROUGH THEURBANECOSYSTEM

The story of phosphorus: Global food security and food for thought

The effect of Penicillium bilaii on wheat growth and phosphorus uptake as affected by soil pH, soil P and application of sewage sludge

Contact Info

Product

Resources

About