||Physical Properties and Processing Characteristics of Macrophytes as Related to Mechanical Harvesting.
Bruh, H. D. ;
Livermor, D. F. ;
Aboab, F. O. ;
||Wisconsin Univ., Madison. Water Resources Center.
||OWRR-B-018-WIS; 06188,; B-018-WIS(2)
( Aquatic weeds ;
( Algae ;
( Harvesting ;
Agricultural machinery ;
Water pollution ;
Water pollution control
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Selective mechanical harvesting of undesirable aquatic vegetation appears to be a feasible and ecologically sound approach to control in recreational waters. The transportation from the harvest area to the disposal site is a major expense in the overall harvest operation. Since aquatic vegetation is approximately 90 per cent water processing and dewatering this material as a part of the initial harvesting operation greatly facilitates its transportation and ultimate disposal or utilization. Intensive mechanical dewatering based on procedures developed in this research results in reducing the fibrous fraction of aquatic vegetation to 16 per cent of its original volume and 32 per cent of its original weight, while removing from the harvested area 90 per cent of the original dry matter, 85 per cent of the protein, 60 per cent of the potassium, and 80 per cent of the phosphorus present in the growing vegetation. The reduction in fiber length resulting from the dewatering process increases the ease with which the vegetative material can be transferred through conveying systems thus further facilitating handling and disposal. The major portion of the equipment required for the preprocessing and dewatering can be developed by utilization and modification of components of all readily available farm and industrial machinery. (Author)