A STUDY OF HIGHLY CONCENTRATED ACTIVATED SLUDGE IN HIGH STRENGTH FERMENTATION WASTEWATER TREATMENT COUPLED WITH ULTRAFILTRATION MEMBRANE.

通过实验， MLVSS/MLSS仍然是最恒定的。MLVSS为13.0毫克/升，MLSS为15.2毫克/升。Toc and NHイD24エD2-N removals were quite good。结果显示了最大特定的筛选率略微减少，而最大筛选率略微增加与MLVSS合并的情况。通过活动分析，是一种缓慢退化的泥浆的特定活动，但显著地增加了反应器中MLVSS浓度的体积活动。膜生物反应器中的聚硫醚和蛋白质含量很高，是由于膜分子的高泥浆浓度和保留。However，它似乎是因为提取物没有累积而不受限制，并且被生物质作为物质退化。各种间歇性的空气模式应用于膜生物反应器中，用于模拟营养、脱氧和有机碳清除。最佳操作条件，I.e.30分钟aeration与10分钟aeration“off”相比较，被发现用于模拟碳和氮元素移除。研究演示，模拟碳和氮元素移除可能存在于一个单一的膜生物反应器，具有氧化-降低潜力作为一个控制参数。最佳中位ORP值应该在+50 ~+100 mV之间进行控制。一个溶解微产品（SMP）形式的数学模型将其转化为活性污泥模型1，基于两种类型的SMP形成的概念：利用相关产品（UAP），其中将其转化为底层利用率;和生物量相关产品（BAP），即在累积生物量集中的情况下产生的。该模型已成功地应用于膜生物反应器过程，具有在间歇空气操作条件下高浓度的活性污泥。

Throughout the experiment, MLVSS/MLSS remained almost constant. MLVSS was 13.0 mg/L and MLSS was 15.2 mg/L. Toc and NHィイD24ィエD2-N removals were quite good. The results showed that the maximum specific nitrification rates slightly decreased, while the maximum denitrification rates slightly increased with the MLVSS concentration. Through activity analysis, the specific activities of sludge slightly decreased, but the volumetric activities of sludge increased significantly with the increase of MLVSS concentration in the reactor.The volumetric contents of polysaccharide and protein were high in the membrane bioreactor, which was due to the high sludge concentration and retention of macromolecules by membrane. However, it seemed that extracellular substance did not accumulate unlimitedly and was degrade by biomass as substrate.Various intermittent aeration modes with real-time control were applied in membrane bioreactor for simulataneous nitrification, denitrification and organic carbon removal. The optimal operating condition, I.e. 30 minute aeration compared with 10 minute aeration "off", was obtained for simultaneous carbon and nitrogen removals.The study demonstrated that simultaneous carbon and nitrogen removals was possible in a single membrane bioreactor with oxidation-reduction potential as a control parameter. The optimal median ORP value should be controlled between +50 〜+100mV.A mathematical model of soluble microbial product (SMP) formation-degradation was incorporated into the Activated Sludge Model No.1, based upon the concept that SMP formation in consisted of two types : utilization-associated product (UAP), which is formed in proportion to the substrated utilization rate ; and biomass-associated product (BAP), which is produced in proportion to the concentration of accumulated biomass. This model was successfully applied to the membrane bioreactor process with high concentration of acivated sludge under intermittent aeration operating condition.