A Comparative and Optimal Experiment of a Sequential Batch Enhanced Pre-Treatment Reactor without Sludge Retention

Abstract

This article focuses on the limitations of the traditional treatment technology of leachate, based on the principles of reaction kinetics and analysis of biological treatment technology, and conducts a comparative study of the synchronization experiments of a sequential batch enhanced pre-treatment reactor without sludge retention (SBER for short), sequential batch reactor (SBR for short), and continuous stirred tank reactor (CSTR for short). It has been confirmed that the SBER has higher and more stable pre-treatment efficiency for organic matter and nutrients, significantly improves the biodegradability and nutrient ratio of pre-treatment, and creates favorable conditions for subsequent aerobic biological treatment. The further orthogonal test confirmed that dissolved oxygen (DO for short), hydraulic retention time (HRT for short), pH, and sequencing period were significant influencing factors on the treatment efficiency of the SBER, and the optimal operating parameters of the SBER were obtained: aeration time (Ta for short) = 8 h/d, HRT = 4 d, pH = 8.0, and sequencing period (Ts) = 6 h.

Keywords

• comparative experiment
• orthogonal test
• leachate
• sequential batch
• enhanced pre-treatment