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![Assessing the potential of full-scale phosphorus recovery by struvite precipitation için kapak resmi Assessing the potential of full-scale phosphorus recovery by struvite precipitation için kapak resmi](/client/assets/d79c3e4af2b6d196/ctx/images/no_image.png)
Assessing the potential of full-scale phosphorus recovery by struvite precipitation
Başlık:
Assessing the potential of full-scale phosphorus recovery by struvite precipitation
Yazar:
Jaffer, Yasmin, author.
ISBN:
9780355893922
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (157 pages)
Genel Not:
Source: Dissertation Abstracts International, Volume: 76-08C.
Özet:
Formation of struvite (MgNH4PO4. 6H2O) at sewage treatment works can cause major operational problems and decrease efficiency. Struvite has a commercial value and the controlled formation of it, in a specified location, would be beneficial. A mass balance was conducted at full-scale across a whole sewage treatment plant, to identify a stream to conduct bench-scale struvite crystallisation studies on. The most suitable stream was identified as the centrifuge liquors. The average flow of the liquor stream was 393 m3 d-1 and the composition was as follows: 167 mg L-1 phosphorus, 44 mg L-1 magnesium, 615 mg L-1 ammonium, 56 mg L-1 calcium and 2580mg L-1 of alkalinity. The pH averaged at 7.6 and the stream had a predicted struvite precipitation potential of 140 mg L-1. Struvite crystallisation occurred quickly during the trials, by raising the pH of the centrifuge liquors to 9.0 and dosing with magnesium. Up to 97% phosphorus removal, as struvite was achieved. Struvite formation occurred when the molar ratio of magnesium : phosphorus was at least 1.05 : 1. Below this ratio phosphorus removals of 72% were observed, but not exclusively as struvite. Annual yields of struvite were calculated to be 42-100 tonnes a year, depending on the dose regime. Revenue from the sale of produced struvite could be £8,400-20,000 a year.
Notlar:
School code: 0719
Mevcut:*
Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
---|---|---|---|
XX(683087.1) | 683087-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
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