• Title/Summary/Keyword: advanced wastewater treatment

Search Result 376, Processing Time 0.027 seconds

Treatment Efficiency and Organic Matter Characterization of Wastewater through Activated Sludge Process and Advanced Wastewater Treatment Process (활성슬러지공정과 고도처리공정에 따른 하수처리수의 처리효율과 유기물 특성)

  • Hong, JiHea;Sohn, Jinsik
    • Journal of Korean Society of Water and Wastewater
    • /
    • v.18 no.6
    • /
    • pp.807-813
    • /
    • 2004
  • Wastewater was treated by two different treatment processes; activated sludge process and advanced wastewater treatment process (KNR process) using lab-scale experiment. Two treated wastewater showed good treatment efficiency of organic matter removal, up to 90% removal. Nitrogen and phosphorus were not effectively removed though activated sludge process, while KNR process showed good removal efficiency of nitrogen and phosphorus; 56% nitrogen removal and 95% phosphorus removal. KNR process showed better removal efficiency of organic matter, nitrogen, and phosphorus compared to activated sludge process. Organic matter characterization was tracked though measurement of UV scan, SUVA, and XAD fractionation. Treated wastewater showed higher SUVA value than wastewater influent, indicting less aromatic characteristic of organic matter. XAD fractionation showed hydrophilic fraction decreased though wastewater treatment, suggesting microbes preferentially digest hydrophilic and aliphatic molecules rather than hydrophobic and aromatic molecules of organic matter.

Trends and Directions in the Development of Wastewater Reclamation and Reuse Technology for Alternative Water Resources (대체수자원 확보를 위한 하수 재이용 기술 동향과 발전방향)

  • Cho, Il Hyoung;Lee, Si Jin;Kim, Ji Tae
    • Journal of Korean Society on Water Environment
    • /
    • v.29 no.1
    • /
    • pp.127-137
    • /
    • 2013
  • Reuse of wastewater will intensify in the coming decades due to water shortage, the change of climatic conditions, the need for industrial and agricultural use and the necessity of improving health and environmental conditions for the growing population. This paper considers (a) the status and trends of wastewater reuse and reclamation in the world, (b) case studies of wastewater reuse projects, (c) analysis of technology level, (d) forecast of global market, and (e) the future views and directions in development of wastewater reuse technologies. Based on the available documented literature, this paper provides a review assessment of the current status of the wastewater treatment processes including potential applications for reuse. Key challenges for both wastewater treatment and reuse are also discussed in the paper and include recommendations, e.g. cost, effluent water quality, energy use and technical solutions, for future developments.

Advanced oxidation technologies for the treatment of nonbiodegradable industrial wastewater (난분해성 산업폐수 처리를 위한 고도산화기술)

  • Kim, Min Sik;Lee, Ki-Myeong;Lee, Changha
    • Journal of Korean Society of Water and Wastewater
    • /
    • v.34 no.6
    • /
    • pp.445-462
    • /
    • 2020
  • Industrial wastewater often contains a number of recalcitrant organic contaminants. These contaminants are hardly degradable by biological wastewater treatment processes, which requires a more powerful treatment method based on chemical oxidation. Advanced oxidation technology (AOT) has been extensively studied for the treatment of nonbiodegradable organics in water and wastewater. Among different AOTs developed up to date, ozonation and the Fenton process are the representative technologies that widely used in the field. Based on the traditional ozonation and the Fenton process, several modified processes have been also developed to accelerate the production of reactive radicals. This article reviews the chemistry of ozonation and the Fenton process as well as the cases of application of these two AOTs to industrial wastewater treatment. In addition, research needs to improve the cost efficiency of ozonation and the Fenton process were discussed.

Application of Advanced Treatment Process for Nitrogen Compounds Removal of Industrial Waste-water (산업폐수 중의 질소 성분의 제거를 위한 고도처리 공정의 응용)

  • Bhang, Sung-Hun;Lim, Eun-Tae;Jeong, Gwi-Taek;Park, Jae-Hee;Park, Seok-Hwan;Kim, Seong-Jun;Park, Don-Hee
    • KSBB Journal
    • /
    • v.23 no.6
    • /
    • pp.541-545
    • /
    • 2008
  • This paper was studied to research regarding the removal of contained nitrogen in industrial wastewater which uses the A2O4 advanced water treatment process. The field researches of two companies' wastewater occurred in each wastewater treatment site to apply the A2O4 process system, it was observed them for 20 days. As a result of the A2O4 system advanced wastewater process which applied an altitude control process obtained $10{\sim}76\;mg/L$, and 20 mg/L total nitrogen compound concentration in the two wastewater plants. In conclusion, it applied the A2O4 system in the two companies' wastewater system.

Removal of nitrogen and phosphorus of the secondary effluent by electro-coagulation (전기응집을 이용한 2차 유출수의 질소.인 제거 공정 연구)

  • Han, Song-Hee;Chang, In-Soung
    • Journal of Korean Society of Water and Wastewater
    • /
    • v.26 no.4
    • /
    • pp.579-589
    • /
    • 2012
  • To reduce extensive energy costs of the internal recycling for the purpose of denitrification in the advanced wastewater treatment, a post-treatment process using an electro-coagulation to treat nitrate in the secondary effluents is evaluated in this study. Removals of phosphorus and organics in the secondary effluents by the electro-coagulation were also evaluated to propose an alternative advanced wastewatert treatment process. A series of experiments of the electro-coagulation were carried out with the following 4 different samples: synthetic solution containing nitrate only, synthetic solution containing nitrate as well as phosphorus, secondary effluents from activated sludge cultivated in laboratory, and secondary effluents from real wastewater treatment plants. Removals of nitrate and phosphorus in the synthetic solution were 30 and 97 % respectively, which verified the feasibility of the process. Removals of nitrate, phosphorus and COD in the secondary effluents from the cultivated sludge in laboratory were 49, 90 and 19 % respectively. Removal efficiency of the total nitrogen, nitrrate, phosphorus and COD in the secondary effluent from real wastewater treatment plant were 50, 61, 98 and 80 % respectively. The removal of the total nitrogen was less than the nitrate as expected, which is due to the formation of ammonia nitrogen in the cathode. But the proposed scheme could be an energy saving and alternative process for the advanced wastewater treatment if further studies for the process optimization are carried out.

A Study of Advanced Oxidation Process for Reuse of Industrial Wastewater (산업폐수 재이용을 위한 고급산화공정 시스템 연구)

  • Kim, Sung-Joon;Jin, Ming-Ji;Won, Chan-Hee;Hwang, Jeong-Seok;Lee, Gil-Yong
    • Journal of Korean Society on Water Environment
    • /
    • v.26 no.4
    • /
    • pp.580-584
    • /
    • 2010
  • As water becomes more scarce around the world the reuse of treated wastewater is being recenlty considered as indispensible trend we need to follow. Especially, industrial area consuming large amount of water has been encouraged to reuse the treated wastewater to secure sufficient water for the production of merchandise. In this study, a study of advanced oxidation process for treatment of industrial wastewater. The treatment performance of UV and ozoznation and five types advanced oxidation processes such as UV/AC, UV/Catalyst, $O_3$/Catalyst, UV/$O_3$/Catalyst was experimentally investigated for reuse of industrial wastewater. The removal efficiency of $COD_{Cr}$, color were relatively evaluated in each treatment unit simulated outflow water of wastewater treatment area. UV/$O_3$/Catalyst process showed the highest $COD_{Cr}$ remaval and color remaval among proposed oxidation process.

Advanced Wastewater Treatment Using Anoxic-Aerobic Reactor Filled with Porous Media (다공성 미디어를 충진한 혐기-호기 반응조를 이용한 하수고도처리에 관한 연구)

  • Kim, Dong-Ha
    • Journal of Korean Society of Water and Wastewater
    • /
    • v.21 no.1
    • /
    • pp.83-89
    • /
    • 2007
  • A biological anoxic-aerobic reactor filled with porous media was operated in lab scale for the advanced wastewater treatment. The experiments were conducted for 6 months with three HRTs (4, 6, 8hr) and temperature of $23{\sim}25^{\circ}C$. Some other experimental conditions were as follows; nitrification reactor (MLSS 4,500mg/L, DO 3.3mg/L, $23{\sim}28^{\circ}C$), denitrification reactor(MLSS 8,000mg/L, ORP -100mV, Temp.$19{\sim}23^{\circ}C$). Average removal efficiencies of SS, $BOD_5$, $COD_{Cr}$, T-N, and T-P were 97.8%, 95.5%, 94.5%, 80.2%, and 60.6%, respectively. The reactor filled with porosity media showed stable removal capacity for organics and nutrients. Fast and complete nitrification and denitrification were accomplished. Maintaining high MLSS with porous media in the nitrification and denitrification reactor appears to enhance the nitrogen removal process. For the higher T-P removal, some coagulant addition process will be needed.

Comparison of Bacterial Numbers and Treatment Efficiencies in Bioreactors of Various Advanced Wastewater Treatment Processes (다양한 고도폐수처리공정에서의 생물반응조 세균수와 처리효율과의 비교)

  • Sung, Gi Moon;Cho, Yeon-Je;Kim, Sung Kyun;Park, Eun Won;Yu, Ki Hwan;Lee, Sang-Hyeon;Lee, Dong-Geun;Park, Seong Joo
    • Journal of Korean Society on Water Environment
    • /
    • v.25 no.2
    • /
    • pp.329-334
    • /
    • 2009
  • Bacterial numbers, such as endospore-formers, and treatment efficiencies were investigated for Rotating Activated Bacillus Contactors (RABC) and other advanced wastewater treatment processes including anaerobic-anoxic-oxic (A2O), sequencing batch reactor (SBR) and biological aerated filter (BAF). Endospore-forming bacterial numbers in the RABC showed 129-fold higher levels than those of the existing advanced systems. RABC process demonstrated the highest bacterial numbers in its bioreactors (paired t-test, p<0.01). RBC biofilms and aeration tanks of the RABC system showed 131- and 476-fold higher than other existing advanced processes, respectively. Mean treatment efficiencies of the existing systems were 83.5% for chemical oxygen demand (COD), 59.1% for total nitrogen (TN) and 76.8% for total phosphorus (TP). However, RABC process removed 96.9% for COD, 96.9% for TN and 91.9% for TP for highly concentrated food wastewater (COD>1,500 mg/L, TN>150 mg/L, TP>50 mg/L). Treatment efficiency was significantly reduced when the numbers of Bacillus genus in the bioreactors decreased below $10^6CFU/mL$. The automated RABC (A-RABC), in which dissolved oxygen concentrations are automatically controlled, showed higher treatment efficiencies compared to the RABC process. The RABC system maintained sufficient bacterial numbers for the effective treatment of highly concentrated food wastewater. Moreover, final effluent was in agreement to water quality standards.

Trends of Technology Development through Investigation and Analysis of Domestic Patent Related to Wastewater Treatment Technology including Membrane, Sludge Treatment and Advanced Treatment Technology and Equipment (분리막 및 슬러지 처리와 고도처리 기술·장비를 포함한 하·폐수 처리기술의 특허 조사·분석을 통한 기술개발 동향)

  • Yoo, Ho Sik;Kim, Ji Tae
    • Membrane Journal
    • /
    • v.27 no.5
    • /
    • pp.375-388
    • /
    • 2017
  • Wastewater treatment (WWT) technology has been developing from simple pollutant treatment to energy and resource-saving advanced technology, and various technologies combined with IT and BT are developed to minimize the amount of pollutant and toxic substance discharge to the public water areas and to improve operational efficiency. To examine the development trend of domestic wastewater treatment technology, the registered patent technologies were surveyed, classified and analyzed by year and sector. This paper considers the status of patent registration related to WWT from 2010.1 to 2017.5 in terms of the number of specific technical areas, and the trends are analyzed based on the 10 categorization field such as biological and physicochemical treatment process, equipment and device, material, sludge treatment, membrane, process control and 42 specific technical areas. A total of 3,356 patents have been registered since 2010, and the number of patents has been decreasing since the peak at 2013 and maintains 3~400 per year. The total number of patents has not yet been less than other countries, but the number of patents of more advanced technologies, which can lead the global market, such as process monitoring, new concept processing and equipment technologies is still insufficient compared to developed countries.

Advanced Wastewater Treatment using Sludge Solubilization by the Cavitation and PGA addition (Cavitation에 의한 슬러지 가용화와 PGA를 이용한 하수고도처리에 관한 연구)

  • KIM, Dongha
    • Journal of Korean Society of Water and Wastewater
    • /
    • v.22 no.4
    • /
    • pp.449-454
    • /
    • 2008
  • Some pretreatment methods have been proposed to enhance the biodegradability and to shorten the hydrolysis reaction time. By means of efficient pretreatment the suspended solids (SS) can be made of better accessible for the anaerobic bacteria. There are several ways how this can be accomplished, which include biological, mechanical, thermal, and chemical methods. For the sludge solubilization using the cavitation phenomenon, we have tried to develop a pretreatment process consisted of a reactor and pumps. The objectives of this study were to develop a advanced wastewater treatment consisted of IABR and the cavitation with PGA. The most effective removal for organic matter and nutrients were occured when both cavitation pretreatment and ${\gamma}$-PGA were applied at the IABR process. Only small portion of ${\gamma}$-PGA at a rate of 1.38mg/L, was enough to improve sedimentation ability, SS removal efficiencies, and sludge volume reduction. After the sludge solubilization by the cavitation, SCOD increased to 193% and SS decreased to 36%. The removal ratio of BOD was 94.5%, T-N removal ratio was 85.5% and T-P removal ratio was 84.9%. The combination process of the IABR with the cavitation and PGA addition seems to be very effective alternative wastewater treatment process.