[논문]Application of Biological Activated Carbon Process for Water Quality Improvement of Stagnant Stream Channels

Lee, Jae-Ho; Park, Jeung-Jin; Park, Tae-Joo; Byun, Im-Gyu

doi:10.4491/eer.2014.031

[국내논문] Application of Biological Activated Carbon Process for Water Quality Improvement of Stagnant Stream Channels 원문보기

Environmental engineering research, v.19 no.4, 2014년, pp.309 - 316

Lee, Jae-Ho (Department of Civil and Environmental Engineering, Pusan National University) , Park, Jeung-Jin (Enco Co., Ltd.) , Park, Tae-Joo (Department of Civil and Environmental Engineering, Pusan National University) , Byun, Im-Gyu (Institute for Environmental Technology and Industry, Pusan National University)

Abstract ▼ AI-Helper

The water quality improvement of golf course ponds, as representative stagnant stream channels, was evaluated by applying a biological activated carbon (BAC) process composed of four consecutive activated carbon reactors. The study was performed from autumn to winter in order to evaluate the feasibility of the BAC process under low temperature conditions. In the study, water quality of pond A (target pond) and pond B (reference pond) were monitored. Pond water was pumped into the BAC process, and was then returned to the pond after treatment. The optimal conditions were determined to be 2 hr of empty bed contact time (EBCT) at a temperature above $4^{\circ}C$, in which improvements of chemical oxygen demand (COD), total nitrogen (TN) and total phosphorus (TP) of pond A compared to pond B were 3.62%, 3.48% and 1.81%, respectively. On the other hand, as the temperature was below $4^{\circ}C$, some degree of water quality improvement was achieved even when EBCT were 1 or 0.5 hr, suggesting that the BAC process can be successfully applied for the improvement of pond water quality in winter months. The values of biomass concentration and microorganism activity in each condition were highest where 2 hr of EBCT was applied at a temperature above $4^{\circ}C$, but values were similar throughout all treatment conditions, and thus, adsorption is considered to be the dominant factor affecting process efficiency. From the denaturing gel gradient electrophoresis (DGGE) results, no significant differences were observed among the activated carbon reactors, suggesting that the number of reactors in the system could be decreased for a more compact application of the system.

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문제 정의

Therefore, this research aims to improve the water quality of a golf course pond through the introduction of a BAC process outside of the golf course pond. Especially, we evaluated the effect of the BAC process on the chemical oxygen demand (COD), total nitrogen (TN) and total phosphorus (TP) improvement of golf course pond.

제안 방법

As this study was a pilot-scale experiment, the applied BAC process was small compared to the scale of the pond, and thus, a larger scale process should be applied in order to more accurately evaluate the effect of such a system on the improvement of water quality and algal reduction. Nitrogen and phosphorus are widely known as the limiting factors of algal production, and thus, the removal of nitrogen and phosphorus directly contributes to a decrease in algae within such a system.
To evaluate the volumetric flow rate and temperature effect on microorganism, attached biomass concentration and INT-DHA were analyzed. Fig.

대상 데이터

A coal based GAC (CLP; Hanil, Korea) with a particle size of < 2.12 mm was used in this experiment.
On-site experiments using a pilot-scale BAC process were also conducted for the improvement of golf course pond water quality. Here, the pilot-scale system consisted of a clarifier and four activated carbon reactors, as shown in Fig. 1. The system was installed 70 m from the golf course pond.
The golf course was located in the city of Yangsan, Korea, and its area was 0.7 km². The golf course contains nine ponds, one of which (pond A) was selected to evaluate the efficiency of the BAC system for the improvement of water quality.

성능/효과

Band E6 has a high similarity to the uncultured bacterium which is detected in the process that degrades organic material in anaerobic conditions [33], thus it is also considered to have grown in inner space of biofilm and have degraded organic compound. As a result of PCR-DGGE, there was no significant difference determined among the microorganism species of each aerobic column, indicating that the number of reactors could be decreased for a more compact application of the system.
On the other hand, the final biomass concentration and microbial activity were similar in each reactor regardless of the condition. The DGGE results also revealed that the discrepancy in diversity of microorganisms for each reactor was not significant, indicating that the number of reactors could be decreased for a more compact application of the process.

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