Environmental Engineering: Energy Value of Replacing Waste Disposal with Resource Recovery

Iranpour, R.; Stenstrom, Michael K.; Tchobanoglous, G.; Miller, David M.; Wright, James R.; Vossoughi, M.

doi:10.1126/science.285.5428.706

Cited by 62 publications

(23 citation statements)

References 36 publications

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“…It will be better if an HABs-control technique could change wastes into valuable products (Iranpour et al, 1999) with HABs and pollutants transformed in situ into contributors to the healthy ecosystem via biogeochemical processes (Pan, 1998). A very promising and environmentally friendly way to do this is to use natural, nontoxic and inexpensive clays to flocculate and remove algal cells (Anderson, 1997;Sengco and Anderson, 2004).…”

Section: Introductionmentioning

confidence: 99%

Removal of cyanobacterial blooms in Taihu Lake using local soils. I. Equilibrium and kinetic screening on the flocculation of Microcystis aeruginosa using commercially available clays and minerals

Pan¹,

Zhang²,

Chen³

et al. 2006

Environmental Pollution

187

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Algal removal abilities of 26 clays/minerals were classified into three categories according to the 8-h equilibrium removal efficiency (Q 8h ) and removal rate at a clay loading of 0.7 g/L. Type I clays (sepiolite, talc, ferric oxide, and kaolinite) had a Q 8h O 90%, a t 50 (time needed to remove 50% of the algae) ! 15 min, and a t 80 ! 2.5 h. Type II clays (6 clays) had a Q 8h 50e90%, a t 50 ! 2.5 h, and a t 80 O 2.5 h. Type III clays (14 clays) with Q 8h ! 50%, t 50 O 8 h and t 80 O 14 h had no practical value in removal of algal blooms. When the clay loading was reduced to 0.2 g/L, Q 8h for all the 25 materials decreased to below 60%, except for sepiolite whose Q 8h remained about 97%. The high efficiency for sepiolite to flocculate M. aeruginosa cells in freshwaters was due to the mechanism of netting and bridging effect.

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Section: Introductionmentioning

confidence: 99%

Removal of cyanobacterial blooms in Taihu Lake using local soils. I. Equilibrium and kinetic screening on the flocculation of Microcystis aeruginosa using commercially available clays and minerals

Pan¹,

Zhang²,

Chen³

et al. 2006

Environmental Pollution

187

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“…More broadly, waste recycling and reuse can provide a viable opportunity to augment traditional resource supplies, at the same time reducing the need for waste disposal [29]. Sustainability requires that we do not address single issues in isolation, but instead adopt a systems approach with integrated solutions.…”

Section: Discussionmentioning

confidence: 99%

Anaerobic Digestion in the Nexus of Energy, Water and Food

Voulvoulis¹

2015

JEPE

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Conventional waste management practices focusing principally on waste collection, treatment and disposal or even minimisation often prove insufficient to address resource management challenges in a sustainable manner. Taking into account the relationship between water provision, energy security and resource efficiency, a systems approach that delivers a strong information basis and provides opportunities for resource use optimisation at various levels of application provides opportunities for synergies that could deliver real benefits when cross-sectoral solutions are applied. By-products from sewage treatment in combination with organic solid waste such as food waste can provide a valuable source of energy if managed properly and utilised effectively. This way, waste can be seen as a raw material than can be turned into a resource rather than simply be discarded. As such, AD (anaerobic digestion), the co-digestion of food waste with sewage sludge, could become a strategic and cross-sectoral solution, if carefully applied, with the potential to convey beneficial synergies for the water and the waste industries. However, barriers to the development of such systems are diverse and often interlinked. Institutional frameworks, decision making constraints, and regulatory boundaries might still appear to require an answer for three different problems, but this can be overcome if presented as just three different parts of the same answer. Such synergies could deliver economic benefits from the additional renewable energy generated and its associated incentives, and savings on costs for the infrastructure required for the exclusive digestion of food waste.

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“…Their rapidly-growing consumption in modern society has inevitably given rise to a large quantity of corresponding waste accumulation [6]. Over the past few decades, the urgency to recover resources from waste plastics has gained unprecedented attention around the world [7][8][9]. However, the technique concerning the reuse of complex snack packaging plastic waste is still not feasible due to its heterogeneous composite constitution and unavoidable external contamination [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Sustainable Steel Carburization by Using Snack Packaging Plastic Waste as Carbon Resources

Yin

Rajarao

Pahlevani

et al. 2018

Metals

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Abstract:In recent years, the research regarding waste conversion to resources technology has attracted growing attention with the continued increase of waste accumulation issues and rapid depletion of natural resources. However, the study, with respect to utilizing plastics waste as carbon resources in the metals industry, is still limited. In this work, an environmentally friendly approach to utilize snack packaging plastic waste as a valuable carbon resources for steel carburization is investigated. At high temperature, plastic waste could be subject to pyrolytic gasification and decompose into small molecular hydrocarbon gaseous products which have the potential to be used as carburization agents for steel. When heating some snack packaging plastic waste and a steel sample together at the carburization temperature, a considerable amount of carbon-rich reducing gases, like methane, could be liberated from the plastic waste and absorbed by the steel sample as a carbon precursor for carburization. The resulting carburization effect on steel was investigated by optical microscopy, scanning electron microscopy, electron probe microanalyzer, and X-ray photoelectron spectrometer techniques. These investigation results all showed that snack packaging plastic waste could work effectively as a valuable carbon resource for steel carburization leading to a significant increase of surface carbon content and the corresponding microstructure evolution in steel.

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Environmental Engineering: Energy Value of Replacing Waste Disposal with Resource Recovery

Cited by 62 publications

References 36 publications

Removal of cyanobacterial blooms in Taihu Lake using local soils. I. Equilibrium and kinetic screening on the flocculation of Microcystis aeruginosa using commercially available clays and minerals

Removal of cyanobacterial blooms in Taihu Lake using local soils. I. Equilibrium and kinetic screening on the flocculation of Microcystis aeruginosa using commercially available clays and minerals

Anaerobic Digestion in the Nexus of Energy, Water and Food

Sustainable Steel Carburization by Using Snack Packaging Plastic Waste as Carbon Resources

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