A composite material and method for removing nitrogen and phosphorus in wastewater
A composite material and wastewater technology, applied in the field of water purification, can solve the problems of insufficient carbon source, weak impact resistance, long generations of nitrifying bacteria, etc., and achieve the effect of improving the removal efficiency of nitrogen and phosphorus
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Embodiment 1
[0028] A composite material for removing nitrogen and phosphorus in waste water comprises the following raw materials in parts by weight: 45 parts of iron tailing sand, 15 parts of steel slag, 15 parts of pine bark and 10 parts of clay.
[0029] Crush them separately, pass through a 100-mesh sieve, mix evenly according to the weight part, control the moisture content at 48%, granulate (2-3 mm), dry at 105 °C, and roast at 600 °C for 5 h.
[0030] After sintering and cooling, the surface layer of the composite material is sprayed Pseudomonas denitrificans ATCC13867 bacteria solution and Acinetobacter johnsonii ATCC 17909 bacterial solution, and then sprayed with sodium alginate solution with a mass concentration of 3%, dried at low temperature, and the bacterial content of the composite material was 3.1×10 8 cfu / g.
[0031] in Pseudomonas denitrificans ATCC 13867 and Acinetobacter johnsonii The ratio of the bacteria amount of ATCC 17909 is 1:2.
Embodiment 2
[0033] A composite material for removing nitrogen and phosphorus in waste water comprises the following raw materials in parts by weight: 30 parts of iron tailing sand, 30 parts of steel slag, 20 parts of pine bark and 15 parts of clay.
[0034] Crush them separately, pass through a 100-mesh sieve, mix evenly according to the weight part, control the moisture content at 52%, granulate (2-3 mm), dry at 105 °C, and roast at 850 °C for 3 h.
[0035] After sintering and cooling, the surface layer of the composite material is sprayed Pseudomonas denitrificans ATCC13867 bacteria solution and Acinetobacter johnsonii ATCC 17909 bacteria solution, and then sprayed with sodium alginate solution with a mass concentration of 4%, dried at low temperature, and the bacteria content of the composite material was 2.5×10 8 cfu / g.
[0036] in Pseudomonas denitrificans ATCC 13867 and Acinetobacter johnsonii The ratio of the bacterial count of ATCC 17909 is 1:1.
Embodiment 3
[0038] A composite material for removing nitrogen and phosphorus in waste water comprises the following raw materials in parts by weight: 25 parts of iron tailing sand, 20 parts of steel slag, 30 parts of pine bark and 13 parts of clay.
[0039] Crush them separately, pass through a 100-mesh sieve, mix evenly according to the weight part, control the moisture content at 60%, granulate (2-3 mm), dry at 105 °C, and roast at 700 °C for 3 h.
[0040] After sintering and cooling, the surface layer of the composite material is sprayed Pseudomonas denitrificans ATCC13867 bacteria solution and Acinetobacter johnsonii ATCC 17909 bacterial solution, and then sprayed with sodium alginate solution with a mass concentration of 4%, dried at low temperature, and the bacterial content of the composite material was 2.3×10 8 cfu / g.
[0041] in Pseudomonas denitrificans ATCC 13867 and Acinetobacter johnsonii The ratio of the bacterial count of ATCC 17909 is 2:1.
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