Effects of Pre-Magnetized on Coagulation and Sedimentation Treatment of Backside Grinder Wastewater

• Main Authors: Shu-Wei Peng, 彭舒維
• Other Authors: Terng-Jou Wan
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/64022834155271925491

碩士 === 雲林科技大學 === 環境與安全工程系碩士班 === 96 === A large amount of nano-particles were stability state in backside grinder wastewater. Therefore, it caused high turbidity and decreased the efficiency of treatment. Although there is no restriction effluent standard for turbidity at present, but turbidity will cause the water quality to be muddy.It is not only influence the sighted , but also relatively higher degree in colorness. Amount of medicine added difficult control, power consumption improvement by a wide margin, retrieve result to be apparent to raise, increase issues such as the cost,etc. Does not accord with the economic benefits and unable to control effectively. Research this deal with, carry on brilliant recovery to carry waste water and utilize research that deal with to coagulant, pretreat coagulant to the brilliant influence which carries the waste water treatment result. Mix and congeal different mechanism''s factors with coagulant to carry on discussion analysis to chemistry. Expect to carry on feasibility research by the association of different conditions, finding out the magnetization effect will mix the relevance which congeals the mechanism to chemistry. Pre-Magnetized on Coagulation cause coagulant pH drop, temperature rise, electric conduction degree rises, pH of FeCl2 after magnetization 1600G, 8 hours is dropped from 2.67 to 2.4, that temperature rises to 44℃, the electric conduction degree rises from 1130 μs/cm to 3140 μs/cm. After chemistry mixes the procedure of congealing, the turbid degree of waste water increases with FeCl2 magnetization time, turbid degree drops with FeCl2 (800G, 4 hours) And the speech is the best, turbidity drops to 16.7 NTU, has not magnetized turbid degree (31.6 NTU) of FeCl2 Reduce by 400%. And magnetize FeCl2 and also reach and change already existingly and add the medicine amount bestly in advance, drop to 40 mg/L (1200G, 4 hours) from original 80 mg/L And the speech is the best. But the speech of and the speed precipitated of congealing in drifting along, can demonstrate from studying in the intensity of low magnetic field, can accelerate precipitating the speed and connecting and shortening and precipitating original 1/3/2 of time, is used in the reducible volume of precipitating the pool in the real field; In the high magnetization intensity, its influence may cause the influence of reverse side.