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| The Effects of Bio-stimulant on OCC Papermaking Activated Sludge Extracellular Polymeric Substances |
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| DOI：10.11980/j.issn.0254-508X.2017.01.005 |
| Key Words:bio-stimulant(BS) extracellular polymeric substances(EPS) loosely bound extracellular polymeric substances(LB-EPS) tightly bound extracellular polymeric substances(TB-EPS) |
| Fund Project:制浆造纸工程国家重点实验室开放基金(201604)。 |
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| Abstract:In the process of OCC papermaking wastewater treatment, the bio-stimulant was added to promote the degradation of pollutants, and finally to remove the pollutants from wastewater. Based on the study of extracellular polymers(EPS), loosely bound extracellular polymeric substances(LB-EPS), and tightly bound extracellular polymeric substances(TB-EPS) of activated sludge of OCC papermaking wastewater, to prove some components could be used as indicator of bio-stimulant dosage which was related to sludge settleability. Experiment using three different COD load of papermaking wastewater, and three groups of different dosages of bio-stimulant were used to carry out the experiment. In order to determine the optimum dosage of bio-stimulant the EPS, LB-EPS, TB-EPS were extract through sulfuric acid method, centrifugal method and ultrasonic wave decomposition method and measured the amount of proteins, polysaccharides and humus of sludge using spectrophotometry. Finally orthogonal experiment of bio-stimulant wastewater treatment was conduct for verification. The results showed that under different inlet COD load, there were different optimal dosage of bio-stimulant. The conclusion was that protein contents in LB-EPS and TB-EPS were the real impact factors on bio-stimulants dosage and sludge settleability control parameters． |
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