Impact of supersaturation ratio on phosphorus recovery from synthetic anaerobic digester supernatant through a struvite crystallization fluidized bed reactor.

Abstract:

:Over the past few decades, several technologies have been developed to recover phosphorus (P) as struvite from wastewater. Although these technologies have achieved reasonable P-removal efficiencies, these technologies are associated with several shortcomings such as high capital and operating costs, longer crystallization time and production of low-quality product. This study focussed on the development of an efficient technology by designing a new fluidized bed reactor (FBR) and determining its optimum operating conditions. The supersaturation ratio is the most important process parameter for struvite recovery. This study exerted effort to establish a range of supersaturation ratios in order to achieve optimum P-removal and recovery with a lesser amount of fine crystals produced. Bench-scale FBR used in this study was able to accomplish 90% P-removal with 18% P-recovery. P-removal efficiency was observed to be increasing with an increase in the initial supersaturation ratio up to a value of 6.5. On the other hand, an increase in the supersaturation ratio resulted in a lower P-recovery efficiency with an increase in fines production. The supersaturation ratio from 5.5 to 6.0 was found to be optimum for efficient operation of the reactor.

journal_name

Environ Technol

journal_title

Environmental technology

authors

Ghosh S,Lobanov S,Lo VK

doi

10.1080/09593330.2018.1435734

subject

Has Abstract

pub_date

2019-06-01 00:00:00

pages

2000-2010

issue

15

eissn

0959-3330

issn

1479-487X

journal_volume

40

pub_type

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