[논문]생물고분자응집제 Biopol32의 산업폐수에 대한 응집활성 및 탈수효과

이명은; 오나라; 서현효

doi:10.5352/jls.2019.29.3.362

생물고분자응집제 Biopol32의 산업폐수에 대한 응집활성 및 탈수효과
Flocculating Activity and Dehydration Efficiency of Biopolymer Flocculant Biopol32 in Industrial Wastewater Treatment 원문보기

생명과학회지 = Journal of life science, v.29 no.3 = no.227, 2019년, pp.362 - 368

이명은 (국립경남과학기술대학교 환경공학과) , 오나라 (주식회사 디아젠 기술연구소) , 서현효 (국립경남과학기술대학교 환경공학과)

초록
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Pseudomonas sp. GP32가 생산하는 생물고분자 응집제 Biopol32의 실제 응용, 개발을 위하여 식품폐수, 도축폐수, 염색폐수에 대하여 응집효과를 검토하였다. 식품폐수의 경우 pH 6.0에서 70%의 화학적산소요구량(COD) 감소율과 49%의 부유고형물(SS) 제거율을 나타내었다. 도축폐수에서는 pH 4.0에서 61%의 화학적산소요구량 감소율과 91%의 부유고형물 제거율을 보였으며, 염색페수의 경우 pH 5.0에서 72%의 화학적산소요구량 감소율과 92%의 부유고형물 제거율을 보였다. 응집과정에서 형성되는 floc의 크기는 Biopol32 용액을 최종농도 20 ppm으로 첨가하였을 때 10 mm였고 이때 탈수효율은 62%였다. 생물응집제 Biopol32 첨가구와 합성응집제 PAA 첨가구에서 탈수효율이 전반적으로 가장 좋은 응집제 첨가 농도는 20 ppm으로 나타났으며, 또한 이때 자연한계함수율(78.1%)에 이르는 최단의 여과시간을 얻을 수가 있었다.

Abstract ▼ AI-Helper

For the practical application and development of biopolymer flocculant Biopol32 produced by Pseudomonas sp. GP32, its flocculation effect on wastewater from food processing, slaughter houses, and the dyeing industry was investigated. In the food processing wastewater, Biopol32 led to a chemical oxygen demand (COD) reduction rate of 70% and a suspended solid (SS) removal rate of 49% at pH 6.0. In the slaughter house wastewater at pH 4.0, a COD reduction rate of 61% and SS removal rate of 91% were observed, and in the dyeing wastewater, the rates were 72% and 92%, respectively, at pH 5.0. The size of floc formed during the flocculation process was 10 mm at a final concentration of 20 ppm, and the dehydration efficiency was 62%. In both the bioflocculant Biopol32 group and a PAA synthetic flocculant group, optimal flocculant concentration that yielded the best overall dehydration efficiency was 20 ppm, and, at this concentration, the shortest filtration time to reach the natural critical moisture content of 78.1% was attained.

주제어

표/그림 (5)

그림 Fig. 1. Schematic diagram of ultrafiltration cell.
그림 Fig. 2. Effect of pH of Biopol32 on the treatment of wastewaters.
표 Table 1. Comparision of flocculation activity on the treatment of industrial wastewaters between Biopol32 and PAA
그림 Fig. 3. Changes in floc size as a function of flocculant concentration.
그림 Fig. 4. Changes in water content at different contentration of Biopol32 in sludge on filtration.

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문제 정의

The flocculation activity for wastewater of food processing, slaughterhouse wastewater, and dyeing wastewater was studied for practical application and development of the biopolymer flocculant Biopol32 produced in this study. The use of flocculants in wastewater treatment is effective in reducing the chemical oxygen demand and removing sus- pended solids through flocculation and sedimentation of the suspended solids in the wastewater [4].

제안 방법

After conducting the flocculation experiment with the jar test, dehydration efficiency was measured using a centrifugal dehydration method, in order to investigate the degree of dehydration based on the size of the formed floc. Dehydration efficiency was found to be higher as the floc size increased (data not shown).
In order to compare the flocculation activity of Biopol32 with synthetic polymer flocculant PAA, a jar test was performed on the food processing wastewater, slaughterhouse wastewater, and dyeing wastewater. In the food processing wastewater, the COD reduction rate and SS removal rate were 70% and 50%, respectively, when Biopol32 was added, and 74% and 55%, respectively, when PAA was added.
In this paper, the flocculation effect and dehydration efficiency of Biopol32, produced by Pseudomonas GP32, in industrial wastewater treatment was investigated and the applicability of Biopol32 in the actual industrial field was examined.
The use of flocculants in wastewater treatment is effective in reducing the chemical oxygen demand and removing sus- pended solids through flocculation and sedimentation of the suspended solids in the wastewater [4]. Since the flocculation effect is affected by the pH and properties of the wastewater, the optimum pH and concentration for each wastewater were investigated in order to establish optimal flocculation conditions.
5 mM) was used as a coflocculant. The final concentrations of Biopol32 were adjusted to 0.1, 1.0, 5, 10, 20, 30, 40 and 50 ppm, respectively, for the jar test, and the resulting floc was applied to a watch plate to measure the floc size. As shown in Fig.
To investigate the flocculation activity (COD reduction rate and SS removal rate) in various wastewaters of food processing wastewater, slaughterhouse wastewater, and dyeing wastewater using a jar test apparatus (Chang shin Co., Korea), 200-ml samples of each wastewater were separated into 250-ml beakers, and the flocculation activity was examined. Next, 5 ml of 0.

이론/모형

To investigate the dehydration efficiency based on the floc size produced after the flocculation experiment using the jar test, a centrifugal filter (Sanyo, SYK-3800-15A, Japan) was used. After the jar test, the floc was poured into a mesh pouch with a pore size of 100 μm, and water was evaporated until the floc reached a constant weight at room temperature.

성능/효과

To confirm the optimal concentration of Biopol32 in the flocculation test for industrial wastewater, the pH of the food processing wastewater, slaughterhouse wastewater and dyeing wastewater was adjusted to the optimal pH 6.0, pH 4.0, and pH 5.0, respectively, and the flocculating activity at different concentration of Biopol32 was measured (data not shown). In the case of the food processing wastewater, addition of 20 ppm of Biopol32 showed the highest flocculating activity with a 75% COD reduction rate and 52% SS removal rate.

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저자의 다른 논문 :

표제어: PCR

동의어: Packet Collision Rate

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