We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Resource Reuse of Waste-Activated Sludge as Raw Material of Microbial Flocculant Preparation: Methods and Comparison.
- Authors
Zhiqiang Zhang; Jiao Zhang; Siqing Xia
- Abstract
Resource reuse of waste-activated sludge (WAS) from a municipal wastewater treatment plant (WWTP) was introduced as raw material of microbial flocculant (MBF) preparation. With WAS samples of three concentrations, MBF preparation by various methods - including cation exchange resin (CER), CER-ultrasonication, CER-ultrasonication-CER, ultrasonication, ultrasonication-CER, and ultrasonication-CER-ultrasonication methods - were comparatively investigated. According to the results of chemical compositions, concentrations, and flocculating activities of the prepared MBFs, the compound methods excelled the sole methods, and the CER-ultrasonication method was the best. Major compositions of the prepared MBFs contained polysaccharides, proteins, and nucleic acids. Improving sludge concentration was beneficial to extract MBF in high concentrations using the above methods. Appropriate MBF mass dosage was crucial its flocculating activity because less or more dosage would deteriorate the flocculation. The mechanism analysis indicated that CER treatment could provide a good pretreatment for ultrasonication, but became useless when it was set after ultrasonication.
- Subjects
WASTE recycling; SLUDGE management; FLOCCULANTS; SEWAGE disposal plants; ION exchange resins; COMPARATIVE studies; GEOCHEMISTRY
- Publication
Polish Journal of Environmental Studies, 2013, Vol 22, Issue 3, p951
- ISSN
1230-1485
- Publication type
Article