Acquaculture Systems and Acquaculture Systems and PlantsPlants

Water stocking management for irrigation

THE LAKETHE LAKE

DEFINED WATER MASS, COLLECTED IN A DEFINED WATER MASS, COLLECTED IN A NATURAL SINK OF HEART SURFACE NOT NATURAL SINK OF HEART SURFACE NOT

LESS 3-5 MT DEEPLESS 3-5 MT DEEP

…..AN ECO-SYSTEM ALWAYS EVOLVING AND GOING TO FILL UP BY SEPARATED STEPS CYCLE DUE TO UNDERGROUND

PROCESS

SEDIMENTATIONSEDIMENTATION

…..INORGANIC MATERIAL AND ORGANIC PRODUCTS CARRIED BY TRIBUTARIES SETTLE AND IMPROVE THE ACQUATIC

VEGETATION DEVELOPMENT

POTENTIAL POLLUTION REASONS

POTENTIAL POLLUTION REASONS:

- Agricultural production

Draining water

POTENTIAL POLLUTION REASONS:

- Agricultural production

Draining water Rain water

POTENTIAL POLLUTION REASONS:

- Agricultural production

Draining water Rain water

Chemicals:

- Fertilizers

-Herbicides/Pesticides

POTENTIAL POLLUTION REASONS:

- Agricultural production

Draining water Rain water

Chemicals:

- Fertilizers

- Disinfectant products

Deposits from plants and ground

MUD ACCUMULATION:The waste accumulation from irrigation exceeded the

lake’s disposal capacity

PONDPOND…GOES TO THE POND PHASE WITH VERY PLENTIFUL

ACQUATIC VEGETATION

BENTIC ZONE

APHOTIC ZONE

PELAGIC ZONE PHOTIC

COAST

ZONE

THE ENVIRONMENTS IN THE LAKE ECO-THE ENVIRONMENTS IN THE LAKE ECO-SYSTEMSSYSTEMS

LIGHT

In this case the oxygen exchange between upper and deep water is almost nul. The microbic oxidation of the organic products can fully exhaust dissolved oxygen in deep water and causes ANOXIA (lack of oxygen) not allowing acquatic organisms’s life

No photosynthesis

DE

PT

H

TEMPERATURE

TEMPERATURE

OXYGEN

DISSOLVED OXYGEN

LAKE WITHOUT CIRCULATION

DAY AND NIGHTDAY AND NIGHT

The oxygen is also produced by alga’s and acquatic plants’s photosynthesis.

Sometimes photosynthesis production is so high that the water can saturate by oxygen.

120 % , 130 %

water saturation.

DAY AND NIGHTDAY AND NIGHT

DIS

SO

LV

ED

OX

YG

EN

(m

g l-1

)

TIME (hr)

DAY PHOTOSYNTHESIS + O2- O2 RESPIRATION NIGHT

DAY AND NIGHTDAY AND NIGHTD

EP

TH

M3

WATER TEMPERATURE (°C)

WATER

By day the air warms up and the upper water warms up more than in depth.

By late afternoon and by night the air grows cool and the upper water grows cool still the lake de-stratifies

PREVAILING OF ANAEROBIC PROCESSPREVAILING OF ANAEROBIC PROCESS

- Anaerobic: “lack of oxygen (O- Anaerobic: “lack of oxygen (O22)”)”

O2

NH3

H2S

ANAEROBIC PROCESSANAEROBIC PROCESS

O2

NH3

H2S

Produces:

- Gas (bad smell)

- Release of Ammonia / NH3

- Suitable conditions for alga growing

- Potential food source for alga

Species of Alga philamentosa Species of Plancton Alga

ANAEROBICANAEROBIC

O2

NH3

H2S

Produces:- Gas (bad smell)

- Release of ammonia / NH3

- Suitable conditions for growing alga

- Potential food source for alga

Species of acquatic plant

Lente palustre (Lemna) Species of acquatic fern

Azolla rossa (Lemna)

THE IMPROVEMENT OF THE QUALITY OF WATER

INVOLVES COSTS FOR:

- DISINFECTION

- FILTRATION

- DISTRIBUTION PROCESS

MANAGEMENT PHILOSOPHY (1/2)

- Stopping the anaerobic cycle

- Adding Aeration/Circulation

O2

NH3

H2S

Submersed aeration and suction

Circulation against destratification

ANAEROBIC CYCLE

Reduced amount of oxygen

Conditions of de-stratification

MANAGEMENT PHILOSOPHY (2/2)

- Chemical test against alga/acquatic plants growing

- Adding Aeration/Circulation

ANAEROBIC CYCLE

Reduced amount of oxygen

Suitable condition for alga growing

Providing right chemical treatment Circulation against de-stratification

O2

NH3

H2S

LIST OF PRODUCTS

Aerators and Oxygenators ACQUA&CO

FORCE 7.2

EOLO EO12

BRIO 1.0

RIO AG20SPLASH

MANAGEMENT PHYLOSOPHY

FIRST:

- Treatment of the problem

- Chemical treatment (if suitable)

- Establishing aeration and circulation mechanic systems and technologies

NEXT:

- Removal/alteration of environmental conditions

- Establishing aeration and circulation mechanic systems and technologies

- Operation test at home in order to remove/reduce the influence of the irrigation draining