CN101054246A - Water integrative treatment technique for prawn cultivation - Google Patents

Abstract

The invention belongs to water treatment technology of aquaculture, in particular to a comprehensive treatment technology of prawns raising seedling water, comprising following steps: a first level filtering-a depositing reservoir-a secondary sand filtering-water body disinfection-throwing in larva. The comprehensive treatment technology of prawns raising seedling water adopts synthetic system for processing water which combines physical, chemical, medication and different kinds of control measures, can efficiently balance the acid-base value of water body, clear away or reduce the poisonous material in water body such as ammonia nitrogen and nitrite, remain chlorine (free chlorine), can extinguish germ and fungus in water, extinguish and clear away various harmful biology in water body, optimize water quality fully, furthest decrease foot phenomenon of seedlings, raise emergence rate, raise output and optimize quality.

Description

Prawn seed-rearing water comprehensive treatment technique

Technical field

The invention belongs to the water technology of culture fishery, particularly a kind of prawn seed-rearing water comprehensive treatment technique.

Background technology

The quality of water quality is the grow seedlings height of output and the key of success of growing seedlings.The processing of water for larval nursing comprises the regulation and control of water temperature, salinity, dissolved oxygen amount, pH value, excess metal ion, toxic substance in elimination or the reduction water body, and the harmful organisms in the removing water body etc.The treatment process of present prawn (mainly being Penaeus vannamei, tigar prawn, japonicus, Chinese prawn etc.) water for larval nursing, usually adopt precipitation, sand filter to filter, add and change water, inflation and throw in quadrol tetracid (EDTA) sodium salt, the chloride class medicine of the employing that has (as chlorinated lime, strong chlorine oil etc.) carries out methods such as seawater sterilization, but this method operation is cumbersome, also has many side effects simultaneously.What have also sterilizes with formaldehyde, but single method and usage and dosage shortcoming are scientific and reasonable, and difficulty is given and being produced a desired effect.At present the control technique to water temperature, salinity, dissolved oxygen amount, heavy metal ion etc. has become ripe, but still undesirable to technology such as the degraded of other toxic substances in the better more effective regulation and control of pH value, the water, harmful organism removings.Thereby cause a lot of nurseries can cultivate the shrimp seedling that quality is better, output is higher under the situation preferably in the nature seawater water quality that draws up, but when nature seawater water quality is relatively poor, just can't cultivate the shrimp seedling, the failure that causes growing seedlings causes economic heavy losses.It is that pH value instability, nitrite, ammonia nitrogen, chlorine residue toxic substances such as (free chlorines) exceed standard that the symptom of seawater quality difference mainly shows, fungi and harmful organism harm etc.Traditional water for larval nursing treatment technology is failed fine overcoming the above problems.

Summary of the invention

The objective of the invention is provides a kind of prawn seed-rearing water comprehensive treatment technique in order to remedy the deficiency that above-mentioned prior art exists.

The technical scheme that the present invention takes is: this prawn seed-rearing water comprehensive treatment technique is step by the following method:

(1) one-level is filtered: nature seawater draws up through the one-level sand filter and filters;

(2) settling tank: seawater enters settling tank after one-level is filtered, and measures seawater pH value, when the pH value below 7.9, the unslaked lime 20ppm that splashes, the pH value 10ppm unslaked lime of splashing more than 8.0; Splash unslaked lime after 8 hours, and the zeolite powder 50ppm that splashes again enters the secondary sand filter and filters after 12-24 hour;

(3) the husky filter of secondary: the silt of secondary sand filter is tiny, and the gac of 30 cm thicks of packing in the pond, enters water reservoir through the seawater of cascade filtration, advances nursery pond then;

(4) water body disinfection: each nursery pond formaldehyde 15-23ppm that splashes, the inflation of full pond is promptly stopped the supple of gas or steam after making medicine evenly;

(5) pond excessively of water for larval nursing: after purifying pool water 72-96 hour after step (4) sterilization, be extracted into another disinfectant nursery pond with lift pump, the water outlet place parcel cotton and the filter bag of lift pump carry out double medium filtration, whenever take out 1-2 Chi Shui and change a cotton, be extracted into predetermined water level, 10 centimetres water discards at the bottom of the pond;

(6) throw in the young: after water for larval nursing was crossed the pond and finished, ethylenediamine tetraacetic acid sodium-salt 2-10ppm was dropped in every pond, and carries out every work such as regulating the qi flowing in the channels, temperature adjustment, and whole water conditioning finishes, and can throw in the young.

Prawn seed-rearing water comprehensive treatment technique of the present invention, it is the system ensemble water quality treatment method that adopts physics, chemistry, medicine and various control measures to combine, the potential of hydrogen of energy active balance water body, toxic substance in energy removing or the reduction water body such as ammonia nitrogen, nitrite, chlorine residue (free chlorine), can kill bacterium, fungi in the water, kill and remove various harmful organisms in the water body, water quality is fully optimized, minimizing De HU pin phenomenon occurs in growing seedlings to greatest extent, improve seedling rate, improve output, optimize quality.Facts have proved that by growing seedlings after the present technique water quality treatment, every cube of water body can be thrown in young 25-50 ten thousand tails, every cube of water body 15-40 ten thousand tails (different sorts prawn density difference) of emerging, even higher, can improve seedling rate 30-100% than traditional method, the safety coefficient of growing seedlings improves greatly.

The advantage of present technique is: (1) by the interpolation unslaked lime of splashing, can balance pH value, can clarify the seawater of muddiness rapidly.(2) by throwing in zeolite powder, can planar water in toxic substance, water quality is more optimized.(3) just reach the effect of killing bacterium in the water, fungi, harmful organism such as bunching worm, pile branch worm etc. with 23ppm formaldehyde sterilization, can effectively reduce or avoid growing seedlings in De HU pin phenomenon appears.(4) water inlet during nursery pond by waterfall gas, purify water, use cotton, filter bag double casing to filter simultaneously, it is pure that water quality is more cleaned.(5) each water link of whole seedling raising process all detects water quality with scientism, carries out the specific aim conditioning according to the water quality situation, and it is good to remain water quality.

Embodiment

The particular content and the method for prawn seed-rearing water comprehensive treatment technique:

(1) one-level is filtered:

Nature seawater draws up through the one-level sand filter and filters, coarse filtration just, and this grade filtering basin can be contained in the sea, also can be contained in land, mainly play a part to intercept thick foreign material and mud.

(2) settling tank:

1. the unslaked lime of splashing

After nature seawater is extracted into settling tank, promptly measure seawater pH value, when the pH value below 7.9, the unslaked lime 20ppm that splashes, the pH value 10ppm unslaked lime of splashing more than 8.0; After unslaked lime is followed the seawater combination, when the acidity of water strengthens, produce following reaction: CaCO ₃+ CO ₂+ H ₂O---Ca ⁺+ 2HCO ₃OH in water ^-When increasing, carry out following reaction and reduce OH ^-: Ca ²⁺+ 2HCO ₃---CaCO ₃↓+2H ⁺+ OH ^----H ₂O unslaked lime can balance seawater potential of hydrogen, can clarify seawater rapidly, can carry out sterilization and disinfection to seawater, and water colour is improved.

2. the zeolite powder of splashing

Splash unslaked lime after 8 hours, and zeolite powder 50ppm again splashes.Toxic substances such as the ammonia nitrogen in the adsorbable seawater of zeolite powder, nitrite, hydrogen sulfide, chlorine residue make water quality become better.Entering the secondary sand filter after splashing zeolite powder 12-24 hour filters.

(3) the husky filter of secondary: the silt of secondary sand filter is tiny, and the gac of 30 cm thicks of packing in the pond, and filtering like this water quality can be better.Seawater through cascade filtration enters water reservoir, advances nursery pond then; Also can directly enter nursery pond from the secondary sand filter.

(4) water body disinfection:

The workshop of growing seedlings is through behind the enclosing sterilizing, reserves 1-2 nursery pond and do not intake and make later water for larval nursing and cross pond usefulness, and other nursery ponds all advance full water.At each nursery pond formaldehyde 15-23ppm that splashes, the inflation of full pond is promptly stopped the supple of gas or steam after making medicine evenly, and Chi Shui is fully purified then.Before throwing in the prawn young, to carry out the pond work of crossing of sterilized water.

(5) pond excessively of water for larval nursing:

After purifying pool water 72-96 hour after step (4) sterilization, just can drop into the prawn young, grasp and throw in the prawn young time, promptly can carry out the pond work of crossing of water for larval nursing, method is: the Chi Shui that disinfects is extracted into another disinfectant nursery pond, and be extracted into predetermined water level, 10 centimetres water discards and does not take out at the bottom of the pond, carry out double medium filtration in the water outlet place of lift pump parcel cotton and filter bag simultaneously, whenever take out 1-2 Chi Shui and change a cotton, fine impurity can both be intercepted, it is pure that filtering water for larval nursing is more cleaned, after exhausting a Chi Shui, again this pond is cleaned and sterilization (using potassium permanganate) once, again another one Chi Shui being taken out, draws analogous conclusions in other ponds.

(6) throw in the young: after water for larval nursing was crossed the pond and finished, ethylenediamine tetraacetic acid sodium-salt 2-10ppm was dropped in every pond, and carries out every work such as regulating the qi flowing in the channels, temperature adjustment, and whole water conditioning finishes, and can throw in the young.

Claims (1)

1, prawn seed-rearing water comprehensive treatment technique is characterized in that step by the following method:

(1) one-level is filtered: nature seawater draws up through the one-level sand filter and filters;

(2) settling tank: seawater enters settling tank after one-level is filtered, and measures seawater pH value, when the pH value below 7.9, the unslaked lime 20ppm that splashes, the pH value 10ppm unslaked lime of splashing more than 8.0; Splash unslaked lime after 8 hours, and the zeolite powder 50ppm that splashes again enters the secondary sand filter and filters after 12-24 hour;

(3) the husky filter of secondary: the silt of secondary sand filter is tiny, and the gac of 30 cm thicks of packing in the pond, enters water reservoir through the seawater of cascade filtration, advances nursery pond then;

(4) water body disinfection: each nursery pond formaldehyde 15-23ppm that splashes, the inflation of full pond is promptly stopped the supple of gas or steam after making medicine evenly;

(5) pond excessively of water for larval nursing: after purifying pool water 72-96 hour after step (4) sterilization, be extracted into another disinfectant nursery pond with lift pump, the water outlet place parcel cotton and the filter bag of lift pump carry out double medium filtration, whenever take out 1-2 Chi Shui and change a cotton, be extracted into predetermined water level, 10 centimetres water discards at the bottom of the pond;

(6) throw in the young: after water for larval nursing was crossed the pond and finished, ethylenediamine tetraacetic acid sodium-salt 2-10ppm was dropped in every pond, and carries out every work such as regulating the qi flowing in the channels, temperature adjustment, and whole water conditioning finishes, and can throw in the young.