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Volumetric Filtration of Rainfall Runoff. II: Event-Based and Interevent Nutrient Fate

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Abstract:
This study examines in situ phosphorus treatment using a combined unit operation and process, a volumetric clarifying filter
VCF. Urban rainfall-runoff transports phosphorus in dissolved and particulate phases with the latter phase distributed across the particulate matter
PM gradation. From a clean initial condition, the VCF was monitored across 19 events without maintenance, to examine partitioning and phosphorus distribution on PM. For the monitoring period, site influent total phosphorus
TP is 0.342 mg/L of which 0.081 mg/L is dissolved; and subsequently reduced to 0.095 and 0.031 mg/L, respectively, by the VCF. PM-bound phosphorus is
categorized as suspended, settleable and sediment fractions based on PM size and separation behavior. Site influent PM-based concentrations
mg/g are 0.22 for sediment, 0.42 for settleable and 3.27 for the suspended fraction with each fraction further enriched in the VCF, based on effluent monitoring. A categorical analysis and odds ratio testing of PM-based phosphorus specific capacities
(mg/g) indicate that a significant fraction of phosphorus can bind to suspended PM preferentially over settleable and sediment PM as a PM-based
concentration. At the end of the event-based monitoring the inter-event change in phosphorus and nitrogen, chemistry is examined as a function of runoff storage time. Runoff retention generates nitrate reduction and ammonia
NH3+NH4 + production; predominately as ammonium. Phosphorus partitioning is stable during runoff storage with a dissolved fraction between one fourth to one-third of TP. Predominant species are H2PO4
− for a pH
7.

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Informasi Detail

Judul Seri

JOURNAL OF ENVIRONMENTAL ENGINEERING

No. Panggil

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Penerbit

New York : ASCE., 2010

Deskripsi Fisik

JOURNAL OF ENVIRONMENTAL ENGINEERING © ASCE / DECEMBER 2010

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

TEKNIK SIPIL

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

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