Chlorella and application thereof in sewage degradation
A technology for degrading sewage and chlorella, applied in the field of environmental engineering, can solve problems such as difficult COD treatment, and achieve the effects of easy cultivation, rapid reproduction, and shortened cycle
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Embodiment 1
[0029] Embodiment 1: Determination of the total nitrogen degradation effect of chlorella
[0030] Chlorella enriched medium (BG-11 medium): NaNO 3 225 mg, K 2 HPO 4 ·3H 2 O 45.6 mg, MgSO 4 ·7H 2 O 125.7 mg, CaCl 2 26.64mg, ferric citrate 75.95mg, EDTA·2Na 10mg, H 2 O 1L, trace elements 1ml / L (H 3 BO 4 28.6g / L, MnCl 2 4H 2 O 18.1g / L, ZnSO 4 ·7H 2 O 2.22g / L, Na 2 MoO 4 2H 2 O 3.9g / L, CuSO 4 ·5H 2 O 0.79g / L, Co(NO 3 ) 2 ·6H 2 O 0.494g / L).
[0031] Simulated sewage medium: KH 2 PO 4 1g, NaCl 3g, K 2 HPO 4 1g, KNO 3 0.72g, C 6 h 12 o 6 3.75g, H 2 O 1L, trace elements 1ml / L (MnCl 2 4H 2 O 2.5g / L, ZnSO 4 ·7H 2 O 2.2g / L, CuSO 4 ·5H 2 O 0.2g / L, MgSO 4 ·7H 2 O 10g / L, CaCl 2 2H 2 O 7.3g / L, CoCl 2 ·6H 2 O 0.5g / L, FeSO 4 ·7H 2 O 5g / L).
[0032] Take 20 μl of the seed solution, inoculate it in 50 ml of BG-11 medium, culture it with shaking at 30°C and 90 rpm for 4 days, and the inoculum size in this example is 3%, then take 3 ml of the enriched me...
Embodiment 2
[0034] Embodiment 2: Determination of the total nitrogen degradation effect of Chlorella with different inoculum amounts
[0035] Chlorella enriched medium (BG-11 medium): NaNO 3 225 mg, K 2 HPO4 ·3H 2 O 45.6 mg, MgSO 4 ·7H 2 O 125.7 mg, CaCl 2 26.64mg, ferric citrate 75.95mg, EDTA·2Na 10mg, H 2 O 1L, trace elements 1ml / L (H 3 BO 4 28.6g / L, MnCl 2 4H 2 O 18.1g / L, ZnSO 4 ·7H 2 O 2.22g / L, Na 2 MoO 4 2H 2 O 3.9g / L, CuSO 4 ·5H 2 O 0.79g / L, Co(NO 3 ) 2 ·6H 2 O 0.494g / L)
[0036] Simulated sewage medium: KH 2 PO 4 1g, NaCl 3g, K 2 HPO 4 1g, KNO 3 0.72g, C 6 h 12 o 6 3.75g, H 2 O 1L, trace elements 1ml / L (MnCl 2 4H 2 O 2.5g / L, ZnSO 4 ·7H 2 O 2.2g / L, CuSO 4 ·5H 2 O 0.2g / L, MgSO 4 ·7H 2 O 10g / L, CaCl 2 2H 2 O 7.3g / L, CoCl 2 ·6H 2 O 0.5g / L, FeSO 4 ·7H 2 O 5g / L)
[0037] Take 20 μl of seed solution, inoculate in 50ml of BG-11 medium, culture at 30°C, 90rpm shaking for 4 days, centrifuge at 5000rpm for 10min, discard the supernatant, and collect ...
Embodiment 3
[0039] Example 3: Effects of different temperatures, inoculum size, carbon-to-nitrogen ratio, and trace element amounts on the degradation of total nitrogen by chlorella
[0040] Take 20 μl of seed solution, inoculate it in BG-11 medium, culture it with shaking at 90 rpm for 4 days at 30°C, centrifuge at 5000 rpm for 10 min, discard the supernatant, and collect algae. According to shown in Table 1 respectively, prepare corresponding simulated sewage culture medium, 250ml triangular flask contains 100ml simulated sewage medium, under corresponding conditions, 90rpm shaking cultivates 6 days, adopts potassium persulfate oxidation-ultraviolet spectrophotometry to measure its degradation total The effect of nitrogen, its degraded total nitrogen result is as shown in table 2, draws its effect curve figure as Figure 4 shown.
[0041] Table 1 Experimental design
[0042]
[0043] Table 2 visual analysis table
[0044]
[0045]
[0046] The results showed that: from the i...
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