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Performance and Process Analysis of Duckweed-Covered Sewage Lagoons for High Strength Sewage - the Case of Sana'a, Yemen
Duckweed (L.gibba)-covered sewage lagoons (DSLs) are low cost treatment systems, especially suitable for warm climates, or in lands where there are warm seasons. This study attempts to assess DSL system as a new technology, contributing to the understanding of the different mechanisms in the system. Duckweed-covered sewage lagoons could either replace complete wastewater stabilization ponds (WSPs) or be introduced as a second stage in an integrated WSP-DSL treatment system, which could then be used for purifying municipal wastewater, achieving suitable effluent for reuse in agriculture. The duckweed harvested from DSL systems has, in itself, an intrinsic economic value.
Sewage Lagoons in Cold Climates
Reviews the performance of sewage lagoons subject to seasonal ice cover in Canada north of 60, northern U.S.A. and Alaska, and identifies research and development needs.
The Role of Sewage Lagoons at Corps of Engineers Recreation Areas
This survey report was prepared to assess the role of Corps of Engineers recreation area sewage lagoons in light of recent technology and current and future Corps problems and needs. A review of the literature was conducted to identify design, operation, and upgrading methods that may be applicable to the special loading problems and other circumstances characteristic of recreation area lagoons. Concurrently, a survey was conducted to establish the geographic distribution and the design and performance successes and failures of the more than 200 Corps recreation area lagoons nationwide. Steps are recommended for improving lagoon waste treatment at recreation areas based on current knowledge, and areas of needed research are identified. (Author).
Cold Climate Sewage Lagoons
Proceedings of a workshop on cold climate sewage lagoons, presenting information on: climatic, biological, physio-chemical andgeotechnical influences; lagoon design and operation, including site selection design models, process design, construction and operation; up-grading lagoon systems using innovative methods of achieving high-qualityeffluents either by modifications to lagoon technology or by the introductionof new ideas such as aquaculture; a summary of the information gapsidentified, which will form the plan for future research; and a formulationof research priorities and organizational framework. The workshop dealtprimarily with conventional facultative lagoon and anaerobic lagoons, butalso dealt with some aerated lagoons which are mainly used in Quebec.
