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Wastewater treatment with complementary filter feeders: A new method to control excessive suspended solids and nutrients in stabilization ponds

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Zooplankton filter feed small suspended solids (SS) while filter-feeding fish (Hypophthalmichthys molitrix) feed on large suspended particles. The combination should control SS and nutrients in wastewater stabilization ponds. The technique proposed herein maintains coexistence of zooplankton and filter-feeding fish by excluding the fish from part of the water column. A series of 1-m3 tanks was stocked with channel catfish (Ictalurus punctatus) alone, catfish and silver carp, or catfish and silver carp that were excluded from one-half of the water column. The refuge permitted coexistence of high densities of zooplankton with the silver carp, and the combination of filter feeders reduced algal biomass by as much as 99% compared to controls. SS and nutrients were presumably likewise controlled. Application to stabilization ponds in series would be straightforward.

Keywords: aquaculture; biological control; nutrients; silver carp; stabilization ponds; suspended solids

Document Type: Research Article


Publication date: 1993-07-01

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  • Water Environment Research (WER) is published monthly, including an annual Literature Review. A subscription to WER includes access to the latest content back to 1992, as well as access to fast track articles. An individual subscription is valid for 12 months from month of purchase.

    Water Environment Research (WER) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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