Aquaculture sewage treatment method
A sewage treatment method and aquaculture technology, applied in the field of aquaculture sewage treatment, can solve the problems of direct discharge of aquaculture sewage and lack of water treatment facilities and equipment, and achieve the effect of improving utilization efficiency, improving effect, and realizing recycling
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[0034] Example 1:
[0035] The specific treatment process of the aquaculture sewage treatment method of the present invention is: first add photosynthetic bacteria to complete the start of the microorganism; then use chitosan (CTS) as the flocculant, and the dosage is 100mg / L sewage (m / v) , The hydraulic retention time of aquaculture sewage in the flocculation tank is 20 minutes, and it is filtered by a microfiltration membrane.
[0036] Analyze and calculate the sewage before and after treatment by this method to obtain the pollutant removal rate. Measured water treatment effect: the removal rate of chemical oxygen demand is 50%~65%, the removal rate of suspended solids is 90%~95%, the removal rate of ammonia nitrogen is 50%~55%, and the removal rate of nitrite nitrogen is 70%~ 80%, the removal rate of active phosphate is 45%-55%. The calculation formula of pollutant removal rate is: , The same below.
Example Embodiment
[0037] Example 2:
[0038] The specific treatment process of the aquaculture sewage treatment method of the present invention is as follows: first add Bacillus subtilis to complete the start of microorganisms. Then use polyaluminum ferric chloride (PAFC) as the flocculant, the dosage is 30mg / L sewage (m / v), the hydraulic retention time of aquaculture sewage in the flocculation tank is 15min, and the ultrafiltration with a cut-off molecular weight of 5000 Membrane filtration. Measured water treatment effect: the removal rate of chemical oxygen demand is 60%~70%, the removal rate of suspended solids is 95%~100%, the removal rate of ammonia nitrogen is 55%~65%, and the removal rate of nitrite nitrogen is 75%~ 85%, the removal rate of active phosphate is 50%~60%.
Example Embodiment
[0039] Example 3:
[0040] The specific treatment process of the aquaculture sewage treatment method of the present invention is as follows: first add photosynthetic bacteria and Bacillus subtilis to complete the start of microorganisms. Then use polyaluminum ferric chloride (PAFC) and chitosan (CTS) as flocculants, and the concentration added in the sewage is: PAFC 30mg / L sewage (m / v), CTS 15mg / L sewage (m / v) ), the hydraulic retention time of aquaculture wastewater in the flocculation tank is 30 minutes, and the ultrafiltration membrane with a cut-off molecular weight of 5000 is used for filtration. Measured water treatment effect: the removal rate of chemical oxygen demand is 65%~75%, the removal rate of suspended solids is 95%~100%, the removal rate of ammonia nitrogen is 60%~70%, and the removal rate of nitrite nitrogen is 80%~ 90%, the removal rate of active phosphate is 55%-65%.
[0041] It can be seen from the above-mentioned embodiments that the method of the present inv...
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