COD is not a normal monitoring point in many parts of the world. In the US, in Canada, in Europe and other parts of the western world, BOD is the point monitored and found in discharge permits.在世界上的许多地方 COD 不是一个常用监测指标。在美国、加拿大、欧洲及其他西方世界，BOD 是常用的监测与排放指标。
In the case of the MAB, the system generated application specific organisms chew up organic materials very quickly. The population of the microbe is very large while the remaining food material is hard for them to digest. This leaves a shortage of organic food materials sufficient for the MAB to complete the degradation of some specific COD source in the short, initial treatment cycle. The remainder of the 29% of Organic Contaminants remaining will be degraded, probably to the 95% plus range over the next few days of operation. The COD was and is not an as easy initial target of the biological treatment cycle.
就固定化微生物载体（MAB）来说，系统产生了特定的微生物，快速地消化了有机成分。微生物的数量很多，但是剩下的食物又难以消化。这导致了 MAB 系统的有机食物来源短缺，从而无法在初始的短周期内降解特定的 COD 来源。剩下的 29%的有机污染物会在接下来几天的运行中被降解到 95%以上。COD 并不是生物处理循环的初始目标。
We have been developing treatment process alternatives to make COD degradation more effective. Two very distinct treatment options have provided promising results in the recent tests.
我们一直在开发替代处理过程，使 COD 降解更有效。在近期的测试中，两个非常不同的治疗方案提供了可喜的成果。
1. We have achieved promising results with an added membrane past the MAB tocollect the potentially 10 8 to 10 9 CFU’s of organisms per ml of liquid treated. The number of organisms harvested and returned to the front part of the system adds huge quantities of hungry selected organisms to the treatment system. They quickly devour and mineralize the residual COD that remains due to the lack of a food source. Attached is the design parameters of the MBR device we used in the test.
通过在 MAB 后面加入膜滤器来收集出水中达到 10 8 to 10 9 CFU 的微生物，我们取得了可喜的成果。微生物被捕获并且回流到系统前端，这为系统增加了大量的饥饿的特定微生物。他们快速的消化矿化了由于缺乏食物而残留的COD。我们附上了实验所使用过的 MBR 装置的参数。
2. Simply add an organic food source for the organisms to the liquid inoculate existing in the MAB. This would be located past the point where the waste was treated and odor and organics were removed. This is a method that needs monitoring because food sources vary in strength and concentration.
简单地将有机食物添加到被 MAB 处理过的水中。应当在经过处理的水中没有臭味且简单有机物被消化完的区段后面加入食物。这种方法需要监测，因为食物的强度和浓度不一样。
Another simple reason for the levels of COD remaining would be the high concentrations of organisms grown by the MAB. The large quantity grown on a continuing basis will show up as COD in the analysis. Removal will greatly enhance the reductions as we believe that the concentration of live organisms produced by the MAB system to be as high as 40+% of the residual COD. So we highly recommend that you get a customized microbe selection, it will lead to higher performance and less residual COD and contaminants at the end of the system.
另一个剩余 COD 过高的原因是 MAB 所产生的高浓度的微生物。持续成长的微生物数量会在检测中被显示为 COD。去除这些微生物会大大增加 COD 去除率，因为我们相信 MAB 系统所产生的微生物浓度占 40%以上的剩余 COD 浓度。所以我们强烈推荐定制微生物，这会提高效率，并且剩余 COD 与污染物更少。