a10万吨糖蜜酒精生产线高浓度有机废水处理项目设计方案

a10万吨糖蜜酒精生产线高浓度有机废水处理项目设计方案内容摘要：

N ≤25mg/l 根据进水水质和出水水质的要求，显然简单的机械处理不能满足要求，因此本工程将采用厌氧 —好氧生物处理的方式以达到上述要求。 According to the requirements of inlet and outlet water quality, apparently simple mechanical processing cannot meet the requirements of this project. Therefore, anaerobic + aerobic process is adopt to meet above requirements. 第三章 污水处理工艺的确定 青 岛 国 桥 进 出 口 有 限 公 司 Qingdao ChinaBridge Import amp。 Export Co.,Ltd. 4 Chapter Three Wastewater treatment process 第一节 处理工艺选择 Section One Treatment process 污水处理工艺的选择直接关系到出水水质指标能否达到要求，关系到运行是否稳定可靠，管理是否方便以及投资和运行成本的高低。 因此，慎重选择适当的处理工艺是污水处理设计的关键。 The choice of wastewater treatment process will directly affect to the outlet water quality, steadily running, management, investment and operation cost. Therefore, careful selection of appropriate treatment technology is the key for wastewater treatment. 糖蜜酒精废水是高浓度、高温度的有机废水，因此简单的机械和物化的方法不能保证污水处理的稳定达标排放，高浓度有机废水如果直接进行好氧处理，势必会造成能耗过高，从而增加污水处理的运行成本，而单独的厌氧处理也不能直接达标排放。 因此，本污水处理工程采用厌氧 +好氧的处理方法。 The molasses alcohol wastewater is anic wastewater with high concentration and high temperature. So simple mechanical and physicchemical method cannot guarantee the qualified discharge of wastewater. If directly use aerobic treatment for high concentrated anic wastewater, it will lead to high cost. And the anaerobic treatment alone cannot reach the requirement either. Therefore, the wastewater treatment project adopts anaerobic + aerobic treatment. 一、厌氧工艺的选择 / Anaerobic process 目前应用于高浓度废水处理成熟的厌氧方案主要有 UASB 和 BIC,因此针对这两种厌氧工艺进行比较如下： At present, there are two kinds of mature process, UASB and BIC, to dispose the high concentrated wastewater. therefore, pare the both processes as follows: （一） UASB 厌氧反应器 / UASB anaerobic reactor UASB 即为上流式厌氧污泥床反应器，为第二代厌氧反应器的典型代表。 整个反应器主体可分为两个区 域：反应区和气、液、固三相分离区。 污水通过水泵提升到厌氧反应器的底部，利用底部的布水系统将污水均匀地布置在整个截面上，同时利用进水的出口压力和产气作用，使废水与高浓度的厌氧污泥充分接触和传质，将废水中的有机物降解。 废水在反应区缓慢上升，进一步降解有机物。 气体、水、污泥在同时上升过程中，沼气首先进入三相分离器内部通过管道排出，污泥和废水通过三相分离器的缝隙上升到分离区，污泥 在分离区沉淀浓缩并回流到三相分离器的下部，保持厌氧反应器内的生物量，沉淀后的出水通过管道排出罐外。 青 岛 国 桥 进 出 口 有 限 公 司 Qingdao ChinaBridge Import amp。 Export Co.,Ltd. 5 UASB is upflow anaerobic sludge blanket reactor, it is the typical representative of the second generated anaerobic reactor. The whole reactor can be divided into two regions: reaction zone and threephase separation zone of gas, liquid and solid. Upgrade the wastewater to the bottom of anaerobic reactor by water pump, distribute the wastewater on the whole section by use of water distributor, meanwhile, utilize the outlet pressure and aerogenesis to make wastewater and high concentrated anaerobic sludge have enough contact and mass transfer, and finally degrade the anic matter in wastewater. The wastewater slowly rise in the reaction zone and further degrade the anic pounds. In the ascent process of gas, water and sludge, the biogas first enter the threephase separator and then discharge through pipeline, meanwhile, the sludge and wastewater upgrade to the separation zone through the gap. The sludge concentrate and return back into the down part of threephase separator to keep the biomass in anaerobic reactor, and the water after precipitation drainage through pipe. （二） BIC 厌氧反应器 / BIC anaerobic reactor BIC 为我公司自主开发研究的内外双循环厌氧反应器，代表了当今厌氧反应器的最高水平。 它是由布水器、提升装置、三相分离器、气液分离器、罐体及出水系统等组成。 BIC is internal and external double loops anaerobic reactor, researched and developed by our own pany. It represents the highest level of present anaerobic reactor, posed by water distributor, upgrading device, threephase separator, gasliquid separator, tank, water discharge system, etc. 可以理解 BIC 是由上、下两个 UASB 组成的两个反应室，下反应室负荷高，上反应室负荷低，在反应器内部，对应分为三个反应区。 That is, the BIC is two reactors posed by upper and lower UASB. The lower reactor has high load and the upper reactor has lower load. Inside the reactor, there are three reacting areas. 分离区 反应区 UASB 反应器结构示意图 出水 进水 沼气 布水系统 三相分 离器 青 岛 国 桥 进 出 口 有 限 公 司 Qingdao ChinaBridge Import amp。 Export Co.,Ltd. 6 ① 高负荷区：借助于本公司的专利防堵 塞的布水系统，高浓度的有机废水均匀进入反应器底 部，完成与反应器内污泥的充分混合，由于内循环作 用、高的水力负荷和产气的搅动，导致反应器底部的 高浓度的颗粒污泥呈良好的流化状态，使废水 与污泥 能够充分接触，如此良好的传质作用和较高的污泥活 性保证了BIC反应器具有较高的有机负荷和有机物去 除率。 ① Highload area: With the pany39。 s patented anticlogging water distribution system, high concentrated anic wastewater enters into the bottom of reactor, carry out the fully mixed with sludge. Due to the internal cycle affection, high water load and gas stirring, the high concentrated granular sludge is in good flow status, the wastewater and sludge will fully contact. Therefore, good mass transfer and high sludge activity ensure the anic load and removal rate for BIC reactor. ② 低负荷区：低负荷区也是精处理区， 在这个反应区内水力负荷和污泥负荷较低，因此可以 有效的对废水中的有机物进行精处理。 in which ② Low load area: It is polishing unit, area, the hydraulic load and sludge load is lower. So the anic matter will be effectively removed from the wastewater. ③ 沉降区： BIC反应器顶部为污泥沉降区，有机物已基本去 除，废水中的少量悬浮物在本区内进一步进行沉降，保证 BIC出水水质。 ③ Settlement area: The top area of BIC reactor is settlement area. The anic matter has been basically removed and small amount suspended matter in wastewater will have further settlement, which ensures the BIC out。