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Removal of ammonia as struvite from anaerobic digester effluents and recycling of magnesium and phosphate [An article from: Bioresource Technology]
Book Details
Author(s)M. Turker, I. Celen
PublisherElsevier
ISBN / ASINB000PDSTQE
ISBN-13978B000PDSTQ2
AvailabilityAvailable for download now
Sales Rank11,199,464
MarketplaceUnited States 🇺🇸
Description
This digital document is a journal article from Bioresource Technology, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
A second order kinetic model was developed to predict the rate and extent of NH"4^+ removal as struvite from anaerobic digester effluents. Alternative to this, NH"4^+ can be recovered from struvite and the remaining Mg^2^+ and PO"4^3^- can be recycled back to the wastewater to fix more NH"4^+. The NH"4^+ solution was retained and the remaining Mg^2^+ and PO"4^3^- were returned back to be mixed with wastewater. In a five-step process, NH"4^+ recovery was initially 92% and progressively decreased to 77% in the fifth stage, due to loss of Mg^2^+ and PO"4^3^- at each step in the supernatant. Finally, economic analysis of recycling nutrients was performed and compared to the one step process. The cost of NH"4^+ recovery was calculated as $0.36/kgNH"4-N which is lower than $7.7/kgNH"4-N the cost of one step process without considering the market value of struvite obtained in one step process.
Description:
A second order kinetic model was developed to predict the rate and extent of NH"4^+ removal as struvite from anaerobic digester effluents. Alternative to this, NH"4^+ can be recovered from struvite and the remaining Mg^2^+ and PO"4^3^- can be recycled back to the wastewater to fix more NH"4^+. The NH"4^+ solution was retained and the remaining Mg^2^+ and PO"4^3^- were returned back to be mixed with wastewater. In a five-step process, NH"4^+ recovery was initially 92% and progressively decreased to 77% in the fifth stage, due to loss of Mg^2^+ and PO"4^3^- at each step in the supernatant. Finally, economic analysis of recycling nutrients was performed and compared to the one step process. The cost of NH"4^+ recovery was calculated as $0.36/kgNH"4-N which is lower than $7.7/kgNH"4-N the cost of one step process without considering the market value of struvite obtained in one step process.
