Type of Document Master's Thesis Author Randall, Andrew A. URN etd-07242012-040054 Title Operational and exocellular biopolymer characteristics of sludges generated from an air products and a convential activated sludge system Degree Master of Science Department Environmental Engineering Advisory Committee
Advisor Name Title Novak, John T. Committee Chair Knocke, William R. Committee Member Randall, Clifford W. Committee Member Keywords
Date of Defense 1987-07-15 Availability restricted AbstractThis study compared the sludge characteristics of a lab-scale Air
Products (A/O) and a conventional activated sludge system. The sludges
were analyzed for operational properties and the exocellular biopolymers
of each sludge was characterized.
Operational analysis mainly consisted of measurements of settling
(SVI) and dewatering (specific resistance, CST) parameters at each
sludge age. Biopolymers were measured using pH extraction followed by
gel filtration and subsequent analysis for carbohydrate and protein
The results showed a high degree of similarity between the two
systems both operationally and with respect to biopolymer
characteristics. The A/0 system did produce a lower effluent soluble
COD at sludge ages below 5 days. Also, the A/O system showed some
consistent differences in the distribution of bound and unbound
fractions of protein and carbohydrate ECP but these had no discernible·
effect on sludge operational characteristics.
In addition relationships between unbound ECP and effluent BOD,
bound HMW ECP and SVI, and phosphorus and Mg uptake were observed, with
varying degrees of consistency, in this study.
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