A total of eight purification materials such as activated carbon,volcanic stone,mafic stone,coral stone,bio-beads,ceramic ring,ammonia-absorbing stone,bacterial ring,etc.were screened with total ni-trogen(TN),total phosphorus(TP),ammonia nitrogen(NH4+-N),nitrate nitrogen(NO3--N),and ni-trite nitrogen(NO2--N)as the detection indexes for the tailwater of the aquaculture tail water before and after the purification to optimize the water purification model.Meanhwile,the In-depth study of the adsorption effect of different water purification materials for different pollutants and the purification effect of the combination of different water purification materials were carried out to optimize the combination of the use of parameters.The results showed that activated carbon had better effect on TN removal,with a maximum removal rate of 31.3%.The bacterial ring had better effect on TP removal,with a maximum removal rate of 38.1%.The biological beads had relatively better effect on NH+4-N and NO2--N removal,with a maximum removal rate of 12%and 25%,respectively.The removing effect of each water purification material was generally not good,with a maxi-mumremoval rate of no more than 4%.The activated carbon,bacterial ring,and biological beads were com-bined in a 1∶1 volume ratio.Overall,the three combinations had sound removal effects on a variety of pollu-tants,of which the combination of bio-beads and bacterial ring had the best effect,TP removal rate of up to 100%,TN,NH4+-N,NO2--N removal effect was better than coral stone,bacterial ring materials,NO3--N removal effect was better than all the single materials,the removal rate of up to 16%.Mechanical filtration was mainly accomplished through the adsorption of water purification materials,different water purification materials had different adsorption effects on different pollutants,and the effect of the combined use of water purification materials was better than the effect of a single water purification material biological beads and bacterial ring com-bination of the best purification effect.
water purification materialsmaterial combinationsaquaculture tailwaterremoval effect
维普
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