Comparison of bioreactors with different kinds of submerged packed beds for domestic wastewater treatment

Nacheva, Petia Mijaylova; Chávez, Gabriela Moeller; Garzón-Zúñiga, Marco A.; Bustos, Cristian; Orozco, Yolanda Hornelas

doi:10.2166/wst.2008.321

Cited by 20 publications

(7 citation statements)

References 8 publications

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“…When operated down flow in a continuous regime, have high degradation rates and allow obtaining of reclaimed water for reuse in public services. The determined specific COD removal rates were very similar in all reactors when they were operated at low organic load [1]. Packed bed is very widely studied contact equipment for wastewater treatment.…”

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confidence: 64%

Performance Evaluation of Packed Bed Reactor for the Treatment of Domestic Waste Water

Rajathi¹,

Ayyanar²,

Ashock³

et al. 2018

IJRASET

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The paper presents the importance and the necessity the efficiency of cleaning process of the domestic waste water. Attached biofilm reactors provide the means for implementing energy efficient anaerobic waste water treatment at full scale. Progress has been made in the development for fixed expanded and fluidized bed anaerobic process by addressing fundamental reactor design issues. The performance of aerobic submerged packed bed reactor was studied for the treatment of domestic waste water using different kinds of packing material with specific area. A reactor in which the filled inert packing material for the growth of biomass is kept packed is called as PBR. The flow of wastewater through the reactor may be upward or downward. The packing material commonly used as slag, rock or ceramic. In the present study, the treatment of domestic wastewater by using packed bed reactor with packing material of PVC flexible pipe is analysed. Keywords: Alkalinity, Hardness, BOD, COD, Packed bed reactor, PVC flexible pipes. I. INTRODUCTIONWaste water is any type of water that has been affected by human use. Waste water is used water from any combination of domestic, industrial, commercial or agriculture activities, surface run off or storm water and any sewer inflow or sewer infiltration. Waste water is discharged to the environment without suitable treatment cause water pollution. The composition of wastewater varies widely that are Chemical or physical pollutant, Biological pollutants and Quality indicators. The aerobic submerged packed bed reactor is made with a specific area of 760-1,200 m2/m3. When operated down flow in a continuous regime, have high degradation rates and allow obtaining of reclaimed water for reuse in public services. The determined specific COD removal rates were very similar in all reactors when they were operated at low organic load [1]. Packed bed is very widely studied contact equipment for wastewater treatment. The studies are reported on effect of parameter like flow rate, contact time, bed height, initial concentration and PH on the break through curve with initial concentration and flow rate, the break through time decreases and it increase with bed height [2]. Microorganism immobilize on a support media is the principle of anaerobic fixed film fixed bed reactors. Its increased capacity of microorganism retention on the support media can cause the hydraulic retention time reduced considerably. There for these types of reactor are widely and easily applied for the various wastewater treatments. The experiments were performed at hydraulic retention times of 1, 2 and 3 d based on empty reactor volume and the performance of the reactor was evaluated based on the removal of organic matter COD, SS, PH Changes and biogas production. The average COD and SS removal efficiencies for Domestic wastewater were 63. 87, 70.85, 75.92 % and 75.24, 84.55, 94.25 % respectively. PH changes from 7.2 to 4.2. Biogas was produced 0.50 to 0.59 l/d. on same HRT. The relationship between the organic removal ra...

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confidence: 64%

Performance Evaluation of Packed Bed Reactor for the Treatment of Domestic Waste Water

Rajathi¹,

Ayyanar²,

Ashock³

et al. 2018

IJRASET

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“…Previously, various researchers have mentioned that about 3-60 days were required to develop biofilm in a fixed film reactor in order to initiate the wastewater treatment processes. [20][21][22] Furthermore, the start-up periods of fixed-film wastewater treatment reactors were reduced by inoculating activated sludge from wastewater treatment plants with suspended growth process, attached biofilm reactors or using purchased microorganisms cultured specially for enhancing wastewater treatment in fixed biofilm treatment technologies. [23,24] Similar strategy of seeding filter media with activated sludge has been followed in the present study to develop biofilm on media that was used in a trickling filter for the treatment of municipal wastewater.…”

Section: Resultsmentioning

confidence: 99%

“…[20][21][22] Moore et al observed shortest start-up phase of 3 days for stable operation regarding removal of COD, and Yu et al reported start-up phase of 7 weeks for biological aerated filters in a temperature range of 20-26°C [20,22]. …”

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confidence: 99%

Assessment of biological trickling filter systems with various packing materials for improved wastewater treatment

Naz

Saroj

Mumtaz

et al. 2014

Environmental Technology

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Attached growth processes for wastewater treatment have significantly been improved during recent years. Their application can be extended to sustainable municipal wastewater treatment in remote locations and in developing countries for the purpose of organic matter (biochemical oxygen demand, BOD) removal and pathogenic decontamination. The aim of this study is to assess selected packing media for biological trickling filters (BTFs) and to develop a simplified model for describing the capacity of BOD removal in BTFs. In this work, BTFs with four different media viz., rubber, polystyrene, plastic and stone have been investigated at two temperature ranges of 5-15°C and 25-35°C. The average removal of both chemical oxygen demand and BOD was higher than 80 and 90% at temperature ranges of 5-15 and 25-35°C, respectively. The geometric mean of faecal coliforms in BTF using polystyrene, plastic, rubber and stone as filter media was reduced by 4.3, 4.0, 5.8 and 5.4 log10, respectively, at a low temperature range of 5-15°C. At a higher temperature range of 25-35°C, the faecal coliform count was reduced by 3.97, 5.34, 5.36 and 4.37 log10 from polystyrene, plastic, rubber and stone media BTF, respectively. Simplified model was developed and used to estimate the optimal BOD loading rates (Bvd) for designing robust BTF systems, with appropriate filter media. It has been concluded that highly efficient BTFs can be designed using various filter media, which may be capable of treating organic loading rates of more than 3 kg BOD/m3 day. These types of BTFs can be applied for the BOD and microbial contaminants removal of wastewater for potential reuse in developing countries.

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“…On the other hand, Nacheva et al (2008) observed more than 95% biodegradation (COD removal) when activated carbon and tezontle were used as biofilm supports in anaerobic biofilters. Specifically, more than 95% biodegradation was obtained with both support materials at organic loads lower than 1.7 kg/m 3 × d in tezontle, and with loads of up to 13.3 kg/m 3 × d in granulated activated carbon.…”

Section: Discussionmentioning

confidence: 99%

Ciliated Peritrichous Protozoa in a Tezontle-Packed Sequencing Batch Reactor as Potential Indicators of Water Quality

Rivas-Castillo

Garcia-Barrera

Garrido-Hernández

et al. 2022

Polish Journal of Microbiology

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The presence of colonial and solitary ciliated peritrichous protozoa was determined in a Sequencing Batch Reactor system filled with tezontle, a volcanic rock, economic, and abundant material that can be found in some parts of the world, like Mexico. The presence of these protozoa was related to the removal efficiencies of organic matter. Also, two novel staining techniques are proposed for staining both colonial and solitary peritrichous protozoa. The results show that tezontle promotes the growth of solitary and colonial ciliated peritrichous protozoa, which, once identified, could be used as indicators of the efficiency of the wastewater treatment process. Additionally, the staining techniques established in the current study allowed the precise observation of protozoan nuclei. They can represent a useful complementary methodology for identifying protozoan species present in water treatment processes, along with the already existing identification techniques. The number and variety of protozoa found in the system may be considered potential bioindicators of water quality during biological treatments.

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Comparison of bioreactors with different kinds of submerged packed beds for domestic wastewater treatment

Cited by 20 publications

References 8 publications

Performance Evaluation of Packed Bed Reactor for the Treatment of Domestic Waste Water

Performance Evaluation of Packed Bed Reactor for the Treatment of Domestic Waste Water

Assessment of biological trickling filter systems with various packing materials for improved wastewater treatment

Ciliated Peritrichous Protozoa in a Tezontle-Packed Sequencing Batch Reactor as Potential Indicators of Water Quality

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