Abstract
To explore the suitable external carbon sources for Micro-pressure swirl Reactor (MPR), the experiment was run in parallel through two MPRs, using starch and glucose as carbon sources respectively. Research indicated that under the experimental operating conditions, using starch as the carbon source could more effectively promote the biological denitrification of the MPR system. Due to the structural characteristics of MPR and the slow degradation of starch, the demand for carbon source for denitrification was ensured during the operation cycle, so that the system obtained a better denitrification effect. The test results provided reference for the selection of the external carbon source of the MPR process.
Highlights
At present, biological nitrogen and phosphorus removal is the most economical and effective means to control water pollution [1]
This study investigated the effects of different carbon sources on micro-pressure swirl reactor (MPR) biological nitrogen and phosphorus removal by adding starch and glucose to the two MPR systems, aimed to provide references for the selection of other carbon sources and the practical application for MPR process
At the time of aeration for 5min, the COD concentration of the MPR system with starch and glucose as carbon sources decreased from 559.9 and 544.3mg/L to 180.6 and 57.19mg/L, respectively, while the COD concentration of the former remained high until the end of the aeration
Summary
Biological nitrogen and phosphorus removal is the most economical and effective means to control water pollution [1]. To effectively remove nitrogen and phosphorus and adapt to various water quality, researchers have designed a variety of sewage biological nitrogen and phosphorus removal processes, and the micro-pressure swirl reactor (MPR) was one of them. By improving the traditional biochemical aeration tank, the reactor had a unique aeration method and a circulating flow state of activated sludge. Controlling the amount of aeration reasonably, three different dissolved oxygen environments (anaerobic, anoxic and aerobic) could exist in a single aeration tank at the same time. The feature made it more able for MPR to achieve simultaneous nitrogen and phosphorus removal from sewage [2]
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