This textbook, titled Aquaculture Machineries and Equipment," has been developed to fulfill the needs of undergraduate and postgraduate students studying Fisheries Engineering or Aquacultural Engineering. Unfortunately, there is currently no comprehensive textbook or practical manual available to cover a wide range of topics within the subject. As a result, students and interested individuals may be left with limited knowledge about the machinery and equipment commonly used in aquaculture, as well as their optimal usage conditions.
The design and management of these machines and systems are primarily based on the production goals of the farming operation and the economic considerations involved. The textbook presents relevant topics in a clear and concise manner, using suitable examples to illustrate key concepts. Additionally, this resource can be beneficial to researchers and individuals involved in the development of aquaculture machinery, providing them with valuable insights and information.
This text book entitled “Aquaculture Machineries and Equipments” has been prepared to meet the requirement of undergraduate and post graduate students of Fisheries Engineering/Aquacultural Engineering. There is no specific book available for this subject to cover many of the topics. Therefore, interested persons and students are feeling worried to have a basic idea to different machineries and equipment’s used and also its optimized usage conditions. The design and management of these machineries and systems is based on their production goals and the economics of the farming operation. This book is answer to this requirement.
Pump is a mechanical device to increase the pressure energy of fluid. Aquacultural enterprises often find it necessary to move fluid against an energy gradient. Most commo n may be filling or emptying of tanks. For performing an assigned job, the best selection of pumps should be such that it should work at its peak efficiency. Unfortunately, there is only one head and discharge condition for each pump where the peak efficiency is obtained and therefore, it is rarely possible to achieve the highest efficiency for a pumping condition. Manufacturers cannot design and build so many varieties of pumps to meet all operating conditions. They have therefore, settled upon some standard designs which are generally required for most of the head and discharge conditions.
Aeration is the addition of oxygen or air containing oxygen to water. Any aquatic species important for commercial purpose requires oxygen. Even photosynthetic plants need oxygen when it is dark. 2.1 Need of aeration Rise in atmospheric temperature causes increased rate of biological degradation of organic matters and subsequent depletion in dissolved O2 concentration in water.
The feeding is an important operation in aquaculture, it is the process of providing nutritious supplements or live feeds to the culture animal. The equipment used for this purpose is named as feeders. Equipment that is connected with fish feeding can be divided into three major groups, as follows
Filtration may be defined as the separation of a mixture or solution into component parts. The resulting components may be pure or may be solutions or mixtures. In water/wastewater treatment filtration technique is used for removing suspended solids, dissolved solids and organic matter.
Harvesting is a complex operation that can be divided into three major parts, as follows: Driving and concentrating the fish stock to the catch basin; Lifting the fish out of the catch basin and placing them on a sorting table; Sorting the fish and loading them on the transporting vehicle.
Material handling includes a number of operations that can be executed either by hand (manual) or by mechanical means or devices to convey material and to reduce the human drudgery. The most common types of mechanical devices for grain handling are;
The oxygen content may be measured either chemically or electronically. The normal chemical method is the so-called Winkler method which is a titration method, consisting of adding certain chemicals to the water and observing a colour change which will be directly related to the oxygen concentration.
