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      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.

      在世界上的許多地方 COD 不是一個(gè)常用監(jiān)測(cè)指標(biāo)。在美國(guó)、加拿大、歐洲及其他西方世界，BOD 是常用的監(jiān)測(cè)與排放指標(biāo)。

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.
       就固定化微生物載體（MAB）來(lái)說(shuō)，系統(tǒng)產(chǎn)生了特定的微生物，快速地消化了有機(jī)成分。微生物的數(shù)量很多，但是剩下的食物又難以消化。這導(dǎo)致了 MAB 系統(tǒng)的有機(jī)食物來(lái)源短缺，從而無(wú)法在初始的短周期內(nèi)降解特定的 COD 來(lái)源。剩下的 29%的有機(jī)污染物會(huì)在接下來(lái)幾天的運(yùn)行中被降解到 95%以上。COD 并不是生物處理循環(huán)的初始目標(biāo)。

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.
       我們一直在開(kāi)發(fā)替代處理過(guò)程，使 COD 降解更有效。在近期的測(cè)試中，兩個(gè)非常不同的治療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.
       通過(guò)在 MAB 后面加入膜濾器來(lái)收集出水中達(dá)到 10 8 to 10 9 CFU 的微生物，我們?nèi)〉昧丝上驳某晒Ｎ⑸锉徊东@并且回流到系統(tǒng)前端，這為系統(tǒng)增加了大量的饑餓的特定微生物。他們快速的消化礦化了由于缺乏食物而殘留的COD。我們附上了實(shí)驗(yàn)所使用過(guò)的 MBR 裝置的參數(shù)。

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.
       簡(jiǎn)單地將有機(jī)食物添加到被 MAB 處理過(guò)的水中。應(yīng)當(dāng)在經(jīng)過(guò)處理的水中沒(méi)有臭味且簡(jiǎn)單有機(jī)物被消化完的區(qū)段后面加入食物。這種方法需要監(jiān)測(cè)，因?yàn)槭澄锏膹?qiáng)度和濃度不一樣。

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.
       另一個(gè)剩余 COD 過(guò)高的原因是 MAB 所產(chǎn)生的高濃度的微生物。持續(xù)成長(zhǎng)的微生物數(shù)量會(huì)在檢測(cè)中被顯示為 COD。去除這些微生物會(huì)大大增加 COD 去除率，因?yàn)槲覀兿嘈?MAB 系統(tǒng)所產(chǎn)生的微生物濃度占 40%以上的剩余 COD 濃度。所以我們強(qiáng)烈推薦定制微生物，這會(huì)提高效率，并且剩余 COD 與污染物更少。