Research of biological treatment upon high concentrations organic acid industrial effluent

• Main Authors: Shou-Ren Chen, 陳守仁
• Other Authors: Zheng-Yi Hseu
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/33669367150152736555

碩士 === 國立屏東科技大學 === 環境工程與科學系所 === 96 === The wastewater amount of one petrochemistry factory is 50 CMD, COD of the wastewater lies between 18000-20000 mg/L, and pH value is about 1.0-2.0, it contain mainly maleic acid, fumaric acid, butanol, phthalic acid, di-butyl phthalate ester, etc. high concentration organic acid and heavy material, heavy material among about 80% obey mainly maleic acid, fumaric acid, butanol, phthalic acid, di-butyl phthalate ester, tar, etc., and output COD invites 950 kg every day. The wastewater active aerobic sludge reactor of this factory total volume is 400 m3 with 55 HP air blower, and 50 m3 clarifier poor at present, and the sand filter such equipment as the trough, and complements and mixes well with neutralization to concern. The limitations volume of the original active sludge pool only deal with the waste water of 40 CMD and 10000 mg/L COD at present, and COD dealt with invites 400 kg every day, and discharge water COD is less than 200 mg/L. Other wastewater must be sent and dealt with to the incinerator but increase fuel oil consumption, and thus this research purpose aims at improving and dealing with equipment the way existing,and add an anaerobic biological sludge tank before the original wastewater treatments system, to remove 60% of COD from the wastewater at least. Furthermore, the exceed wastewater entered the active sludge pool of aerobic treatment system and carried on surplus COD were got rid of.hope to bring all waste water into biological treatment system, in order to reduce the operating cost. Because wastewater contain above-mentioned high concentra- tion organic acid made anaerobic biological unable to get with this environment, so first testing in a 100 L tank with three phases separator, biological mud source from pig farm wastewater anaerobic active mud, factory wastewater of 18000 mg/L at the same time (pH 6.5~7.2) directly. The result shows, in the begging only 7.45% of COD was removed but can obviously and improve the remove rate of COD gradually from the low concentration is trained, but the waste water COD remove rate unable to improve over 71% at COD 5,700 mg/L.After changed and renew the anaerobic biological sludge and adjust the wastewater input concentration, and then add the micronutrients for increasing and detesting anaerobic biological adaptive capacity again, 100 L can reach and operate wastewater at COD 12000 mg/L (pH 6.5~7.5) to test the trough steadily finally Allocate and test COD and get rid of leading and is up to 70~90%.