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《Journal of Harbin University of Civil Engineering and Architecture》 2003-06
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Stabilization and control of alkalinity during sulfate-reduction

WANG Ai-jie;REN Nan-qi;LIN Ming;DU Da-zhong, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China, E-mail: waj05782003@163. com  
Continuous-flow test was conducted in an acidogenic sulfate-reducing reactor supplied with sulfate- laden wastewater to investigate the stabilization and control of alkalinity during sulfate reduction. When the highest sulfate removal rate was achieved at different experimental stages and was maintained at a stable level, the following issues were discussed: the constitution of total alkalinity and its calculation, the effect of volatile fatty acid (VFA) and pH value on the stability of alkalinity, and the conversion of different kinds of alkalini- ty. The experimental results showed that alkalinity increased during sulfate-reduction, and different form of al- kalinity could convert each other to a certain. The constitution of total alkalinity was closely related to pH val- ue. Sulfate removal rate and the value of alkalinity could reach the highest level with pH of 6.0~6.2. Most of the alkalinity in acidogenic sulfate-reducing reactor existed in the form of Ac~--alkalinity but the cushion capa- bility was controlled under the balance of H_2CO_3/HCO_3~-. 300 ~ 500 mg/L alkalinity in influent was necessa- ry for the balance and adjustment of alkalinity in such a reactor.
【Fund】: 国家自然科学基金(50208006);; 黑龙江省自然科学基金(E200026)
【CateGory Index】: X703
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