Research On EGSB-BES United Technology Treating Wastewater From Sugar Producing Industry

Sugar industry is one of the country’s basic industr ies. C hina is the second largest sugar consumer in the world. Sugar produc ing last for six months a year. During the producing of the sugar, lots of byproducts were emerged. These byproducts having high color, high CO D concentration of features, would greatly damage the environment if flow in the environment directly. But it has high sugar content and that’s why it’s easy for biodegrading. It’s a good raw material for the production of hydrogen which have a higher value than methane. The price of hydrogen is 1.25￥/L, much more higher than methane. Producing hydrogen from wastewater would be a great deal.In this study, the expand ed granular sludge bed(EGSB) was used to deal with the sugar industry waste water, and can generate hydrogen and deal with polution in same time. Limit ied by the weakness of dark fermentation, the majority of energy flow out with t he organic in the water. Therefore, anaerobic baffled reactor(ABR) was added to effluent treatment. In order to make the product unique to hydrogen, microbial electric ity cell was added in the ABR system for EGSB effluent treatment. The ABR- MEC system can take full advantage of the substrate and the acids are converted into hydrogen. The study is about the start- up of EGSB hydrogen production reactor using different inoculum, the impact of HRT on EGSB hydrogen production reactor, the running of ABR- MEC in different HRT and applied voltage, and the effect of combined process were explored.The EGSB inoculated Ethanoligenens harbinense YUAN-3 effluent concentration of organics is 5100mg/L, and the acid ification rate was more than 60%. The hydrogen yie ld of the reactor was up to 1.39 mol H2? mol glucose-1, and the hydrogen production rate was up to 3.03 L H2? L-1?d-1. The organic concentration of effluent of EGSB inoculated sludge was 5200 mg/L, and the hydrogen yield was 1.05 mo l H2? mol glucose-1. The hydrogen production rate was 2.82(L H2? L-1?d-1), and the acidification rate was more than 60%. two reactors had same O RP of below-400 mV. The two reactors share the evenly p H of 4.3 or less. Comparison of the various aspects of EGSB, the Et hanoligenens harbinense YUAN-3 inoculated EGSB had superior peformance than sludge inoculated EGSB.C hanges of HRT had great impact on the acidification rate of EGSB hydrogen production reactor. When the HRT is 12 h, 9h, 6h, 3h, the EGSB hydrogen production reactor had an acidification rate of 68.4%, 66.7%, 63.4.8% and 53.9%. When the hydraulic retent ion time was lower than 6h, the utilization of the substrate will go down quickly. So choose the lowest HRT 6h as the orperating HRT of the reactor.Run ABR- MEC at different HRT and applied voltage. The best operating condit ion for the reactor was 2d for HRT and 1V for the applied voltage. The energy efficiency of ABR- MEC at this condit ion was 250%, and had a hydrogen production rate of 1756ml/d.The joint operation of both reactors, CO D removal effic iency of the entire system is 53%. If we have more same type of ABR- MEC, an EGSB can provide the runing of 5 MEC. In all this process can produce hydrogen up to 16.2L/d.EGSB-MEC craft a good solut ion for dark fermentat ion. Wastewater was truly dealed and produced energy at the same time. It didn’t cause secondary pollut ion in this process, while the superior ity of Ethanoligenens harbinense YUAN-3 had been reflected in this study.