US EPA

2028352 

Journal Article 

SANI (R) process realizes sustainable saline sewage treatment: Steady state model-based evaluation of the pilot-scale trial of the process 

Lu, Hui; Ekama, GA; Wu, Di; Feng, J; van Loosdrecht, MCM; Chen, GHao 

2012 

1 

Water Research
ISSN: 0043-1354
EISSN: 1879-2448 

46 

2 

475-490 

English 

22130002 

10.1016/j.watres.2011.11.031 

WOS:000299609400022 

A steady state model was developed for evaluating the sulfur cycle based SANI(®) process. The model comprises: 1) a COD-based anaerobic hydrolysis kinetics model to determine removal of biodegradable COD and sulfate under different hydraulic retention time (HRT) and sludge retention time (SRT), 2) an element (C, H, O, N, P, S), COD and charge mass balanced stoichiometric part for prediction of the concentrations of alkalinity (H(2)CO(3)(*) alkalinity + H(2)S alkalinity), COD, sulfate, sulfide, nitrate and free saline ammonia in anaerobic sulfate reduction, anoxic autotrophic denitrification and aerobic autotrophic nitrification, and 3) an inorganic carbon (HCO(3)(-)) and sulfide (H(2)S/HS(-)) mixed weak acid/base chemistry part for pH prediction. Through characterization of the sewage organic matter and determination of the anaerobic hydrolysis kinetic rate and other relevant parameters, the steady state model was calibrated to a pilot plant for the SANI(®) process. The model predictions agreed well with the experimental data of the pilot-scale trial, demonstrating that the model developed from this study can explain the causes and conditions for the different bioprocesses and minimal sludge production in the SANI(®) process. 

SANI (R) pilot system; Saline water supply; Saline sewage; Steady state model