SU1130301A1 - Method of enriching water basins with oxygen produced by phytoplankton in the process of photosynthesis - Google Patents

Abstract

A method of enrichment of water bodies with oxygen produced by phytoplankton in the process of photosynthesis, including water withdrawal from the deep layers, lifting it and distribution on the surface of the reservoir, characterized in that, in order to intensify the photosynthesis process, enrich the water throughout the entire area of the water system with an artificial water body, it has a water body. into the air, the water intake is carried out in the central deep-water part of the reservoir, and its distribution over the surface is made by two horizontal oppositely directed towards the shallow waters currents that are pulsed to generate waves on the surface and create a vertical circulating current in the deepwater part and the bottom countercurrent in shallow water, while the length of the generated waves is 0.3-0.5 water depth at the water intake site. (L co oo

Description

The invention relates to fish farming, in particular, to methods for improving the hydrochemical regime of fish ponds, and can be used to prevent the occurrence of shut-off situations in them.

A known method of enriching water bodies with oxygen, which involves taking water in the bottom layers of the water body and releasing it into the air by thin radially directed jets 1.

However, the method is based on the saturation of water with oxygen in the air during its spraying in a certain part of the water area and does not ensure effective mass transfer over the entire area of the reservoir.

The closest to the proposed technical essence is the method of enrichment of water bodies with oxygen produced by phytoplankton in the process of photosynthesis, including water withdrawal from the deep layers, its rise and distribution over the surface of the water body. In this case, the surface layers of water are enriched with biogenic elements located in the lower layers of the reservoir, which stimulates the development of phytoplankton 2.

Water supply in a known manner occurs in turbulent flows. This allows for good mixing of the raised water from the surface but does not allow for mass transfer both in the deepwater part of the reservoir and in shallow water, which reduces the intensity of photosynthesis.

The purpose of the invention is to intensify the process of photosynthesis, the enrichment of water with oxygen over the entire area of the reservoir and the reduction of the diffusion of oxygen from water to air.

This goal is achieved by the fact that according to the method of enrichment of water bodies with oxygen produced by phytoplankton during photosynthesis, including water withdrawal from deep layers, its rise and distribution over the surface of the water body, water is taken in the central deepwater part of the water body, and its distribution over the surface two horizontal oppositely directed streams in the direction of the shallows, which are pulsed to generate waves on the surface and create a vertical circulation In the deep water part and the bottom counterflow in shallow water, and the length of the generated waves is 0.3-0.5 the depth of the reservoir at the water intake site.

The drawing shows a diagram of the circulation of water in a reservoir.

To implement the method, a device is used, comprising (Fig. 1) a housing 1 with a suction pipe 2, in which two rotors 3 with blades are mounted, which are rotated one towards the other.

The method of enrichment of water bodies with oxygen is carried out as follows.

Using the device, water is taken from the bottom layers of the reservoir, it is lifted to the surface, and then the rising rotor 3 is ejected by two oppositely directed streams 4 in the direction of shallow water.

. The rotors 3 pulverize the water, as a result of which they are generated on

the surface of the reservoir is wave 5, and in the reservoir a vertical circulation current 6 arises in the deep-water part of the reservoir and a bottom counter-current 7 in shallow water. Such methods of raising and distributing water provide an intensive mass exchange.

between the bottom and surface layers of water in the reservoir, while the biogenic elements located in the lower layers of water are brought to the surface and can be used by phytoplankton, developing in these layers of water, and a significant part of the oxygen produced by phytoplankton will be flow into the deeper layers of water, which will reduce its diffusion from water to air. The length of the generated waves 5 should be 0.3-0.5 from the depth of the reservoir in the central deep-water part, where water is drawn so that they can spread without significant energy loss in the zone of influence of the vertical circulation flow and expend energy

to create a bottom countercurrent when they run into shallow water.

When the waves move in deep water, when the wavelength is less than the depth in a given place of the reservoir, the water particles describe closed trajectories without moving progressively and not mixing, therefore the waves propagate without significant energy loss. When the waves run up in shallow water, when the depth decreases to a value commensurate with the wavelength, the forward movement of particles appears

On the water and there is a bottom counterflow 7, directed from the coast to the deepwater part.

With a known ratio between the wavelength D, the frequency V, and the speed of propagation, the propagation of the waves Cf

l l - y

By varying the frequency of pulsation, it is possible to obtain waves of the required parameters (length), which is required for reservoirs of individual depth.

0 Example 1. It is necessary to enrich water in a fish-breeding pond with a depth in the central part of 4 m and average depths in the shallow water of 1.5 m.

Water is taken in the central deepwater part of the reservoir at a depth of 3.5 m, reaches the surface and is directed horizontally to the opposite banks of the reservoir by two pulsating streams. In order to spread the will in the deep-water part without significant loss of energy, their length should be equal to 1.5 m (0.5 of the depth at the sampling site). At the speed of propagation of waves of the SF of 2 m / s, the frequency should be

V - at 1.33 waves / s. Example 2. The enrichment of a reservoir with oxygen with a maximum depth of 2.5 m and an average depth of 1.2 m in shallow water is carried out.

The method is carried out in the same manner as in Example 1, but the wavelength is 1.2 m.

The frequency at the same speed of propagation of waves m / s is equal to

, 66 waves / s.

The use of the proposed method of enriching the water of aquaculture with oxygen will reduce energy consumption, improve the living conditions of fish and thereby increase fish productivity.

Claims (1)

METHOD OF ENRICHMENT OF RESERVOIRS BY OXYGEN PRODUCED BY PHYTOPLANCTON IN THE PROCESS OF PHOTOSYNTHESIS, including water intake from the deep layers, its rise and distribution over the surface of the reservoir, characterized in that, in order to intensify the process of photosynthesis, enrichment of water with oxygen and its decrease over the whole water area water into the air, water intake is carried out in the central deepwater part of the reservoir, and its distribution on the surface is carried out by two horizontal flows oppositely directed towards shallow water which are supplied in a pulsating mode to generate waves on the surface and create a vertical circulation flow in the deep water and bottom-flow counterflow in shallow water, while the length of the generated waves is 0.3–0.5 of the depth of the reservoir at the point of water intake. SU-1130301