In aquaculture, what is the way to detoxify the raw water for the survival of aquatic seedlings?

MBFB can effectively remove ammonia nitrogen, COD and other refractory small molecule toxic organic compounds in micro-polluted water.

The Membrane Biofluidized Bed Process (MBFB) is based on the biofluidized bed, with Pow-Dered Activated Carbon (PAC) as the carrier, combined with the solid-liquid separation technology of the membrane bioreactor (MBR), so that the reactor integrates the physical adsorption of activated carbon, microbial degradation and the efficient separation of membranes. The small molecule organic matter that is difficult to degrade in the water body and the activated carbon powder in the fluidized state under aeration conditions are fully transferred and mixed, adsorbed and enriched on the surface of the activated carbon, so that the surface of the activated carbon forms a local pollutant concentration area; At the same time, powdered activated carbon also provides a special surface for microbial reproduction, and its porous surface adsorbs a large number of microbial flora, especially the microbial flora with target pollutants as metabolic substrates. At the same time, the powder activated carbon has a strong adsorption capacity for dissolved oxygen in the water body, and under the condition of high dissolved oxygen, the microorganisms oxidize and decompose the small molecule organic matter enriched on the surface of the activated carbon, and then use the ceramic membrane separation system to separate the water and the suspended particles such as powder activated carbon that adsorb organic matter, and further purify the sewage through cross-flow filtration, so that it can meet the standard of reclaimed water reuse.

At present, the heavy metal removal process mainly adopts chemical precipitation method, by adjusting the pH of the water body, or adding a precipitant, or adding a chelating agent, so that the heavy metals are precipitated, and although the chelating agent such as EDTA can be partially chelated and detoxified, the chelated medium metal is still in the water, and who is likely to be re-released, harming the seedlings.

There is also an advanced process: sand water pump (weighted metal scavenger) AFF (suspended solids) air flotation (heavy metal removal) MBFB (small molecule organic poisons, ammonia nitrogen, nitrate) cm seedling pond (add detoxification compound enzyme).

For common fingerlings, quicklime is most commonly used in production. 20 days in advance, 40 100 pounds of mu * rice. The first time you use it, you can sprinkle it on the bottom mud after drying the pond, turn the ground, and sprinkle it again.

All kinds of fish have different requirements for quicklime, this is a scaly fish, and a scaleless fish should consult a professional for details.

Common disinfection methods in aquaculture:

1. Physical disinfection method: that is, the use of sedimentation tank filtration or zeolite powder adsorption to remove impurities and pollutants in the aquaculture water, this method will not cause secondary pollution to the breeding environment, but its weakness is that the waste of resources is amazing.

2. Chemical drug treatment method: this method has continued for decades of traditional aquaculture treatment methods, that is, the use of quicklime, bleaching powder, flocculants, chlorine or bromine-containing disinfectants and some dyes and other organic or inorganic compounds to improve water quality, this method is a palliative method, can only produce effects in the short term, but at the same time of improving the water environment, it will have a negative impact on aquaculture animals, and some will even have a significant impact on the environment and food safety.

3. Microbial regulation method: that is, the use of beneficial microorganisms to absorb ammonia nitrogen, nitrite nitrogen and hydrogen sulfide in the water body, effectively decompose macromolecular organic matter, and inhibit the proliferation of pathogenic bacteria, which is an environmental treatment method for the root cause and the best measure to promote green aquaculture.

It's a big deal, you go and find it, a lot of systematic information.

Exposure: no cost, suitable for the winter off-season, many places in Guangdong are drying ponds in winter, especially in the past two years, what is the loss, they all say that the first year of the pond, the second year is good to raise!

Water circulation: through physical (sand filtration, activated carbon, ceramsite, etc.) circulation water purification lime powder sprinkled throughout the pool: low cost, high calcium content, good for shrimp and crab breeding animals, can improve the hardness of water, before the release of water and during the breeding period are available.

Bleaching powder: disinfection is thorough, the cost is high, and it is generally used before seedling.

What are you going to disinfect? Water or pond?

Aorodo Ozone I don't have to say much about it, but I will consult it myself.

c This question tests the conciseness, coherence and cohesive ability of the old and old students' expressions, observes the context of the finger field text, and improves the coherence and cohesion of language use. Start by identifying the central topic (3). Waiter teasing.