Vegetated Submerged Beds with Artificial Substrates. 1: BOD Removal
Publication: Journal of Environmental Engineering
Volume 117, Issue 4
Abstract
Settled wastewater was batch fed into 22‐L microcosms containing monocultures of the emergent aquatic plants Sagittaria latifolia, Scirpus pungens, Phragmites australis, and Typha latifolia. Plants were cultured in 1.25‐cm gravel, and 2.5‐ and 5.0‐cm plastic trickling filter media, with specific surface areas of 394, 279, and respectively. Microcosm performance was evaluated in terms of the percent of influent biochemical oxygen demand (BOD) load removed. BOD removals were evaluated at loads ranging between 2 and 24 g Nonvegetated microcosms performed equivalently to vegetated microcosms over the range of BOD loads tested. Plastic was equivalent to gravel at low loads, but was inferior at higher loads. This was attributed to the higher specific surface area of the gravel and poorer plant growth in plastic. None of the plant species was consistently superior to the others in terms of BOD removal. First‐order BOD‐removal rate coefficients for these batch‐loaded systems were higher than those reported for continuous‐flow systems.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 117 • Issue 4 • July 1991
Pages: 394 - 407
Copyright
Copyright © 1991 ASCE.
History
Published online: Jul 1, 1991
Published in print: Jul 1991
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