The Effect of Aquatic Animal and Plant Combination with Microalgae on Sewage Purification in Livestock and Poultry Farms
The purification effect of different aquatic plant and animal combinations with microalgae was studied by orthogo-nal test.The results showed that the addition of microalgae can promote the effect of nitrogen and phosphorus removal in sewage.When the addition of chlorella was 1000 mL,the removal effect of total nitrogen,nitrate nitrogen and total phos-phorus was the best,which was 4.8％,32.63％and 22.18％When the amount of Chlorella added was 2000 mL,the re-moval effect of ammonia nitrogen and COD was better,and the removal rate was 25.77％and 13.30％higher than that of the unadded Chlorella group.Among them,the best combination of TN and N03-N after water removal was 270 g·m-2,2.2 × 106cell·mL-1 of chlorella,400 g·m-2 and 10 strains of black algae(planting density 200 g·m-2).The best combi-nation of ammonia nitrogen removal is 540 g·m-2,4.4 × 106cell·mL-1,200 g·m-2,and 5 strains of black algae and bitter grass(planting density 200 g·m-2).The best combination of total phosphorus TP was 540 g·m-2,2.2 × 106cell mL-1,400 g·m-2,and 10 black algae(planting density 200 g·m-2).The study shows that the application of orthogonal test can optimize the aquatic plant combination of livestock and poultry sewage purification treatment process,for different target pollutants,has different optimal parameter combination,considering the influence of various factors on the removal of the target pollutants,can choose the optimal parameter combination,through the recovery of biogas slurry breeding microalgae for further purification farm sewage,realize waste recycling,for deep sewage treatment technology has a good application prospect.
万方数据
维普
