Experimental Study of Algae Removal Technology with Broadband Electromagnetic Field

doi:10.11985/2020.01.016

Abstract

Abstract:

Based on the effect of magnetic fields on cells, the electromagnetic field algae removal method has become an emerging algae removal technology. Due to the diversity of algae populations, a fixed magnetic field can only solve a single alga. In order to remove multiple algae groups and improve algae removal efficiency, taking advantage of the wide spectrum of alternating triangular waves, a new technology of algae removal by alternating magnetic field is proposed. An alternating magnetic field is generated by an alternating triangular wave through an inductor, a set of generators capable of generating stable high-frequency alternating triangle waves is designed, and an experimental platform is set up. Experiments are performed on algae by changing the frequency to generate different magnetic fields. Finally, algae are compared before and after the experiment. The results show that within the frequency range, the higher the frequency, the higher the removal rate of algal bodies.

Key words: Electromagnetic field algae removal, triangular wave, spectrum

CLC Number:

TM154

DAI Shuwen,FENG Deren. Experimental Study of Algae Removal Technology with Broadband Electromagnetic Field[J]. Journal of Electrical Engineering, 2020, 15(1): 110-116.

Figures/Tables 16

References 15

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	时间/min	0	5	10	15
对比样	显微镜(放大倍数为80) 下图片
	藻细胞数目/ (×10⁷个/L)	0.928	1.150	1.410	1.760
	增长率(%)	0	23.9	51.9	89.7
20 kHz试验样	显微镜(放大倍数为80) 下图片
	藻细胞数目/ (×10⁷个/L)	1.540	1.020	0.864	0.608
	灭藻率(%)	0	33.7	43.9	60.5

	时间/min	0	5	10	15
对比样	藻细胞数目/ (×10⁷个/L)	0.928	1.150	1.410	1.760
对比样	灭藻率(%)	0	-23.9	-51.9	-89.7
20 kHz	藻细胞数目/ (×10⁷个/L)	1.540	1.020	0.864	0.608
20 kHz	灭藻率(%)	0	33.7	43.9	60.5
30 kHz	藻细胞数目/ (×10⁷个/L)	1.630	1.280	0.800	0.512
30 kHz	灭藻率(%)	0	21.6	51.0	68.6
40 kHz	藻细胞数目/ (×10⁷个/L)	1.630	1.120	0.672	0.448
40 kHz	灭藻率(%)	0	31.4	58.8	72.5
50 kHz	藻细胞数目/ (×10⁷个/L)	1.700	1.060	0.576	0.160
50 kHz	灭藻率(%)	0	37.7	66.0	90.6
60 kHz	藻细胞数目/ (×10⁷个/L)	1.180	1.180	0.544	0.352
60 kHz	灭藻率(%)	0	24.5	65.3	77.6