A Study of the Changes of Water Quality before and after Utilizing Low Frequency and Low Power Ultrasound Treat Algae

摘要

This paper reports before and after the low frequency low power ultrasound were treated with different concentrations of algae in Taihu Lake sample water quality changes, and we have found that low frequency and low power ultrasonic can not only safe and efficient removal of algae in Taihu Lake, and the treated water quality improved significantly. After two times of ultrasonic treatment and for 24 hours, high, medium and low concentrations of algae in water samples by nitrogen (TN) dropped 75.8%, 73.2%, 72.9%, total phosphorus (TP) declined 62.2%, 63.5%, 72.9% Chemical oxygen demand (COD) decreased significantly, TP/TN values increased from 0.3 ～ 0.36 to 0.6 ～ 0.89, the physical and chemical properties of sample water is almost not affected.