BOD5 Articles
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Treatment of domestic wastewater by a hybrid natural system
The present study addresses performance evaluation of a hybrid natural system comprising of settling tank, sand-gravel filter (SGF), aerated constructed wetland (ACW) and vermifilter (VF) for the treatment of domestic wastewater. The sequential batch experiments were conducted in a pilot-scale experimental set-up. The biochemical oxygen demand (BOD5) was varied from 20 to 120 mg/L and the ...
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The effect of aerated rock filter geometry on the rate of nitrogen removal from facultative pond effluents
Rock filters are an established technology for polishing waste stabilization pond effluents. However, they rapidly become anoxic and consequently do not remove ammonium-nitrogen. Horizontal-flow aerated rock filters (HFARF), developed to permit nitrification and hence ammonium-N removal, were compared with a novel vertical-flow aerated rock filter (VFARF). There were no differences in the ...
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Coal cinder filtration as pretreatment with biological processes to treat pharmaceutical wastewater
This study aims at coupling coal cinder filter with biological process to improve pharmaceutical wastewater quality and reduce the disposal cost. In the coal cinder filter, the removal efficiencies of COD, BOD5, SS and color were 90±2%, 72±2%, 95±2% and 80±2%, respectively. The results attribute to the big specific surface area and strong adsorption ability. Coal cinder filter removes a large ...
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Simultaneous carbon and nitrogen removal from municipal wastewater in full-scale unaerated/aerated submerged filters
Characterization and evaluation of a biological submerged filter was carried out on a full-scale pilot plant performing removal of biochemical oxygen demand (BOD) and total nitrogen (TN) from pre-treated urban wastewater. The average influent values of BOD5, chemical oxygen demand (COD) and TN were 370, 1,015 and 60 mg/L, respectively. The pilot plant produced good discharge quality during ...
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Potential of organic filter materials for treating greywater to achieve irrigation quality: a review
The objectives of this literature review were to: (i) evaluate the impact of greywater generated in rural communities, with the emphasis on Jordanian conditions, on soil, plant and public health and assess the need for treatment of this greywater before it is used for irrigation, and (ii) assess the potential of different types of organic by-products as carrier material in different filter units ...
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Removal of contaminants and pathogens from secondary effluents using intermittent sand filters
Intermittent infiltration percolation of wastewater through unsaturated sand bed is an extensive treatment technique aimed at eliminating organic matter, oxidizing ammonium and removing pathogens. The main purpose of this study was to determine the depuration efficiencies of a sand filter to remove contaminants from secondary wastewater effluents. Elimination of pathogenic bacteria (total and ...
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Simulation and verification of hydraulic properties and organic matter degradation in sand filters for greywater treatment
To evaluate the treatment performance of vertical flow sand filters, the HYDRUS wetland module was used to simulate treatment in an experimental set-up. The laboratory filters were intermittently dosed with artificial greywater at a hydraulic loading rate of 0.032 m3 m−2 day−1 and an organic loading rate of 0.014 kg BOD5 m−2 day−1. The hydraulic properties of the ...
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Treatment of wastewater from a school in a decentralized filtration system by percolation over organic packing media
Based on results obtained in the laboratory a WWTP composed of a septic tank and an aerated percolating filter packed with organic media was built for a school. The system can treat 18 m3 d−1 and was operated with a hydraulic loading rate of 0.078 (m3 m−2 d−1). For 360 days different operational conditions including start-up; stabilization; operation with aeration and non aeration; effect of ...
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Biological wastewater treatment Dalian, China
To manage the demands set for the plant, a biological treatment with fixed bed was chosen. The water first undergoes pre-treatment by screening and grit/grease removal. Primary sedimentation is done in 4 tanks with lamellar sedimentation. The first step in the biological treatment consists of BOD, COD and SS removal in 12 Biofor filters. In these filters round expanded clay aggregates, ...
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SANASA Capivari II – the first full-scale municipal membrane bioreactor in Latin America
The macro region of Campinas (Brazil) is rapidly evolving with new housing developments and industries, creating the challenge of finding new ways to treat wastewater to a quality that can be reused in order to overcome water scarcity problems. To address this challenge, SANASA (a publicly owned water and wastewater concessionaire from Campinas) has recently constructed the ‘EPAR (Water ...
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Treatment of oil-field produced water by combined process of Anaerobic Baffled Reactor (ABR)-Biological Aerated Filter (BAF): a pilot study
The combined process of Anaerobic Baffled Reactor (ABR) and Biological Aerated Filter (BAF) was used to treat the oil-field produced water. The experimental results showed that for ABR the removal efficiency of oil and COD was 84.5%, 40.8%, respectively, and the ratio of BOD5/COD of the effluent increased 24.8% when the flow rate was 0.3 m³/h. For the BAF, when the hydraulic loading rate was ...
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Aquaculture sewage treatment process and technical points
The organic matter concentration is high, the suspended solids are many, and the color is deep. The NH3-N concentration is very high due to the large amount of animal feces, and it contains a large number of pathogenic bacteria. The pollutants in the sewage mainly exist in the form of solid and dissolved carbohydrates, which make the sewage show high BOD5, CODcr, SS and chromaticity. , P and ...
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Municipal Sewage: Ashbourne, UK - Case study
Background Ashbourne STW in Derbyshire is a municipal sewage treatment works (STW) which receives a large proportion of industrial eflluent from a chicken processor in the town. Severn Trent Water received an application from the chicken processor to double production capacity. A subsequent review indicated that the oxidation ditches were already operating at 95% of their capacity and an upgrade ...
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The solutions of domestic sewage treatment
The source of domestic sewage? Domestic sewage is the waste water discharged from the daily life of residents, mainly from residential buildings and public buildings, such as residences, institutions, schools, hospitals, shops, public places and toilets of industrial enterprises. The pollutants contained in domestic sewage are mainly organic matter (such as protein, carbohydrates, fat, urea, ...
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