ZHUYe-chen,ZHANGZheng-hui,XUJian,et al.Application of Deep Well Pressurized Coagulation Concentration Technology in the Treatment of High Algae?laden Surface Water from Taihu Lake[J].China Water & Wastewater,2023,39(19):53-60.
Application of Deep Well Pressurized Coagulation Concentration Technology in the Treatment of High Algae?laden Surface Water from Taihu Lake
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第19期
Page:
53-60
Column:
Date of publication:
2023-10-01
- Keywords:
- high algae-laden surface water from Taihu Lake; deep well pressurized; coagulation sedimentation; turbidity
- Abstract:
- This paper optimized the dosage of coagulant by coagulation experiment, determined the settling velocity of the particles in high algae-laden surface water from Taihu Lake after pressurized coagulation through static settling experiment, and investigated the performance of deep well pressurized coagulation for the treatment of high algae-laden surface water in a pilot test, so as to explore its feasibility for the concentration of high algae-laden surface water, optimize the technical parameters and apply it to engineering practice. When the ratio of PAC dosage to dry weight of algae was controlled at 16%-32%, and the ratio of PAM dosage to dry weight of algae was controlled at 0.3%-0.4%, the settling velocity of particles in the high algae-laden surface water from Taihu Lake after pressurized coagulation reached approximately 47 cm/min, and the surface load of the settling tank reached 10 m3/(m2·h). In the actual project, the high algae-laden surface water could be concentrated from the average solid content of 0.5% to 4.08%, resulting in the effluent turbidity, chlorophyll-a, TN and TP decreased to 1.83-8.33 NTU, 6.32-11.72 g/L, 0.30-5.20 mg/L, and 0.03-0.26 mg/L.
Last Update:
2023-10-01