生物膜A／O法处理PTA废水的试验研究

Pilot Study on Terephthalic Acid (TPA) Wastewater Treatment Using an A/O Biofilm Process

在含两级Ａ／Ｏ和生物炭的连续运行试验装置上处理ＰＴＡ废水，结果表明：进水ＣＯＤｃｒ为１１０１ｍｇ／Ｌ，ＨＲＴ为４０ｈ，Ｏ２段和生物炭出水中残余ＣＯＤｃｒ分别为８２ｍｇ／Ｌ和５５ｍｇ／Ｌ，相应ＣＯＤｃｒ去除率分别为９２％和９５％；进水ＣＯＤｃｒ为１１１２ｍｇ／Ｌ，ＨＲＴ为３２ｈ，Ｏ２段和生物炭出水中残余ＣＯＤｃｒ分别为８６ｍｇ／Ｌ和６４ｍｇ／Ｌ，其去除率分别为９２％和９５％；在上述试验条件下刀；段ＴＡ去除率均为９３％。

A continuously operating pilot plant consisting of a two - sarge A/O bio film system and a biological activated carbon unit was used to treat a wastewater from a fine TPA production process. It was found that when the pilot plant was operated at a hydraulic residence time (HRT) of 40 h with an influent having a COD., concentration of I I cling/L, then the second stage of the A/O system and the biological activated carbon unit had their effluentS with a CODe, concentration of 82 mg/ L and 55 mg/ L respectively, and a corresponding CODe, removal of 92% and 95%, respectively. When the pilot plant was operated at a HRT of 32 h with an influent having a CODe, concentration of 1112 mg/ L, the second stage of the A/O system and the biological AC unit had their effluents with a CODcr, concentration of 86 mg/ L and 64 mg/ L respectively, and a corresponding CODe, removal of 92% and 95%, respectively. Under the above conditions of operation,the second stage of the A/O system had a TA (total acid) removal of 93% for both cases.