title: Simulation and optimization of ammonia removal at low temperature for a double channel oxidation ditch based on fully coupled activated sludge model (FCASM): a full-scale study.
abstract: An optimal operating condition for ammonia removal at low temperature, based on fully coupled activated sludge model (FCASM), was determined in a full-scale oxidation ditch process wastewater treatment plant (WWTP). The FCASM-based mechanisms model was calibrated and validated with the data measured on site. Several important kinetic parameters of the modified model were tested through respirometry experiment. Validated model was used to evaluate the relationship between ammonia removal and operating parameters, such as temperature (T), dissolved oxygen (DO), solid retention time (SRT) and hydraulic retention time of oxidation ditch (HRT). The simulated results showed that low temperature have a negative effect on the ammonia removal. Through orthogonal simulation tests of the last three factors and combination with the analysis of variance, the optimal operating mode acquired of DO, SRT, HRT for the WWTP at low temperature were 3.5 mg L(-1), 15 d and 14 h, respectively.
authors.affiliation: School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China.
authors.forename: Min
authors.initials: M
authors.lastname: Yang
authors.forename: Peide
authors.initials: P
authors.lastname: Sun
authors.forename: Ruyi
authors.initials: R
authors.lastname: Wang
authors.forename: Jingyi
authors.initials: J
authors.lastname: Han
authors.forename: Jianqiao
authors.initials: J
authors.lastname: Wang
authors.forename: Yingqi
authors.initials: Y
authors.lastname: Song
authors.forename: Jing
authors.initials: J
authors.lastname: Cai
authors.forename: Xiudi
authors.initials: X
authors.lastname: Tang
mesh_terms: D000641:Ammonia / Q000302:isolation & purification*; D002138:Calibration; D003080:Cold Temperature; D008956:Models, Chemical; D010084:Oxidation-Reduction; D012722:Sewage; D062065:Wastewater
chemical_list: D000641:Ammonia; D012722:Sewage; D062065:Wastewater
keywords: Ammonia removal; Full-scale; Fully coupled activated sludge model (FCASM); Low temperature; Numerical optimization