Results 141 to 150 of about 1,243 (179)

A Theoretical and Practical Evaluation of Struvite Control and Recovery

Water Environment Research, 2013
ABSTRACT: Struvite accumulation is a costly problem in many water resource recovery facilities (WRRFs) that use anaerobic digestion, causing significant labor and equipment costs and potentially impacting facility performance and permit compliance. A comprehensive study was undertaken to evaluate possible solutions to struvite control at two similar ...
Robert, Sharp, Enrique, Vadiveloo, Robert, Fergen, Manuel, Moncholi, Paul, Pitt, David, Wankmuller, Ron, Latimer   +6 more
openaire   +2 more sources

Phosphorus Recovery by Methods Beyond Struvite Precipitation

Water Environment Research, 2018
Unintentional phosphate precipitation at water resource recovery facilities (WRRFs) causes operation and maintenance challenges. With global phosphorus (P) scarcity looming and receiving water eutrophication caused by excess discharges of P, intentional P recovery at WRRFs has been gaining traction. To date, struvite recovery as slow release fertilizer
Kam P, Law, Krishna R, Pagilla
openaire   +2 more sources

Recovery of Struvite from Calf Manure

Environmental Technology, 1999
A full-scale plant for the recovery of struvite from calf manure has been installed at a calf manure treatment facility at Putten (the Netherlands), and is in the final stages of testing. If successful, all 4 calf manure treatment facilities, with a combined annual volume of appr.
R. D. Schuiling, A. Andrade
openaire   +1 more source

Recovery of Ammonia as Struvite from Anaerobic Digester Effluents

Environmental Technology, 2001
The effects of environmental conditions on ammonia removal as struvite (Magnesium ammonium phosphate, MAP) were studied in a laboratory scale batch reactor. MAP precipitation was carried out by adding phosphoric acid and magnesium source either as MgCl, or MgO. The effect of temperature, pH, MgN:P ratios were studied.
I, Celen, M, Türker
openaire   +2 more sources

Recovery of phosphorus as struvite from sewage sludge ash

Journal of Environmental Sciences, 2012
Phosphorus (P) is an element vital for all living organisms, yet the world's reserves of phosphate rock are becoming depleted. This study investigated an effective P recovery method from sludge ash via struvite precipitation. Results showed that more than 95% of the total P content was extracted from sludge ash by applying 0.5 mol/L HCl at a liquid ...
Huacheng, Xu, Pinjing, He, Weimei, Gu, Guanzhao, Wang, Liming, Shao   +4 more
openaire   +2 more sources

Sorption of Chromium with Struvite During Phosphorus Recovery

Environmental Science & Technology, 2012
Struvite (MgNH(4)PO(4)·6H(2)O; MAP) precipitation is a viable means of phosphorus (P) recovery from animal and human wastes. The behavior of metal contaminants such as chromium (Cr) during struvite precipitation, however, requires consideration. Here the influence of both Cr concentration and oxidation state on sorption is assessed.
openaire   +2 more sources

Microwave treatment and struvite recovery potential of dairy manure

Journal of Environmental Science and Health, Part B, 2008
Microwave digestion of liquid dairy manure was tested for the release of nutrients, such as orthophosphates, ammonia-nitrogen, magnesium, calcium and potassium, both with and without the aid of an oxidizing agent (hydrogen peroxide). The orthophosphate to total phosphorus ratio of the manure increased from 21% to greater than 80% with 5 minutes of ...
Asif, Qureshi, Kwang Victor, Lo, Ping Huang, Liao   +2 more
openaire   +2 more sources

CO2-assisted phosphorus extraction from poultry litter and selective recovery of struvite and potassium struvite

Water Research, 2018
Phosphorus recovery from industrialized poultry operations is necessary to ensure sustainable waste management and resource consumption. To realize these goals, an innovative, two-stage process chemistry has been developed to extract nutrients from poultry litter and recover value-added products.
Utsav Shashvatt, Josh Benoit, Hannah Aris, Lee Blaney   +3 more
openaire   +2 more sources

Optimizing Struvite Production for Phosphate Recovery in WWTP

Journal of Environmental Engineering, 2008
Struvite, a crystalline structure comprised of ions of magnesium Mg +2 , ammonium NH4 -N , and phosphate PO4 -P ,i s commonly encountered in wastewater treatment plants WWTPs through struvite encrustation. The gradual accumulation of this crystal in pipes and fittings leads to high costs due to downtime and replacement of parts.
A. L. Forrest, K. P. Fattah, D. S. Mavinic, F. A. Koch   +3 more
openaire   +1 more source

An economic evaluation of phosphorus recovery as struvite from digester supernatant

Bioresource Technology, 2006
Phosphorus can be recovered from wastewater through crystallisation of struvite, MgNH(4)PO(4).6H(2)O. Approximately 1 kg of struvite can be crystallised from 100 m(3) of wastewater. Crystallisation is profitable compared to chemical and biological removal of phosphorus due to savings from the reduction in (i) chemicals used for precipitation and sludge
Shu, L., Schneider, P., Jegatheesan, V., Johnson, J.   +3 more
openaire   +3 more sources