Poultry slaughterhouse wastewater treatment plant for high quality effluent

2015 ◽  
Vol 73 (2) ◽  
pp. 309-316 ◽  
Author(s):  
V. Del Nery ◽  
M. H. Z. Damianovic ◽  
R. B. Moura ◽  
E. Pozzi ◽  
E. C. Pires ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Upflow Anaerobic Sludge Blanket ◽  
Uasb Reactor ◽  
Anaerobic Sludge ◽  
Phosphorus Concentration ◽  
Removal Efficiencies ◽  
Nitrification And Denitrification

This paper assesses a wastewater treatment plant (WWTP) regarding the technology used, as well as organic matter and nutrient removal efficiencies aiming to optimize the treatment processes involved and wastewater reclamation. The WWTP consists of a dissolved air flotation (DAF) system, an upflow anaerobic sludge blanket (UASB) reactor, an aerated-facultative pond (AFP) and a chemical-DAF system. The removal efficiencies of chemical oxygen demand (COD) (97.9 ± 1.0%), biochemical oxygen demand (BOD) (98.6 ± 1.0%) and oil and grease (O&G) (91.1 ± 5.2%) at the WWTP, the nitrogen concentration of 17 ± 11 mgN-NH3 and phosphorus concentration of 1.34 ± 0.93 mgPO4−3/L in the final effluent indicate that the processes used are suitable to comply with discharge standards in water bodies. Nitrification and denitrification tests conducted using biomass collected at three AFP points indicated that nitrification and denitrification could take place in the pond.

scholarly journals Evaluation of a domestic wastewater treatment plant at an intermediate city in Cochabamba, Bolivia

2019 ◽  
Vol 14 (4) ◽  
pp. 908-920 ◽  
Author(s):  
Oliver Saavedra ◽  
Ramiro Escalera ◽  
Gustavo Heredia ◽  
Renato Montoya ◽  
Ivette Echeverría ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Agricultural Land ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Upflow Anaerobic Sludge Blanket ◽  
Uasb Reactor ◽  
Annual Rainfall ◽  
Medium Size ◽  
Anaerobic Sludge

Abstract This study aims to determine the seasonal variability in the performance of a medium size population wastewater treatment plant (WWTP) in Bolivia. The semi-arid area where the WWTP is located is characterized as agricultural land, with an annual rainfall of 500 mm and a mean temperature of 17 °C. The WWTP is built up of five modules, each one comprising two treatment trains composed of an upflow anaerobic sludge blanket (UASB) reactor and horizontal gravel filter. The performance of the full process has been determined based on water quantity and quality. Seven monitoring campaigns of chemical and physical wastewater characteristics were performed from March to December 2017. The measured effluent showed average removal efficiencies of 83 ± 8% and 37 ± 60% for total chemical oxygen demand (COD) and total suspended solids (TSS), respectively. The treatment system has proven to be efficient to remove organic matter and TSS, despite the occurrence of high COD and total solids (TS) influent concentrations, the accumulation of solids at all the processes and the variability of flow and temperature inside the UASB reactors. In order to improve further this efficiency, it is recommended to implement a primary sedimentation unit as a pretreatment for the UASB system that would help to homogenize both the flow and the quality of the influent.

Impact of microaeration bioreactor on dissolved sulfide and methane removal from real UASB effluent for sewage treatment

2020 ◽  
Vol 81 (9) ◽  
pp. 1951-1960 ◽  
Author(s):  
C. S. Cabral ◽  
A. L. Sanson ◽  
R. J. C. F. Afonso ◽  
C. A. L. Chernicharo ◽  
J. C. Araújo
Keyword(s):  
Sewage Treatment ◽  
Oxygen Demand ◽  
Post Treatment ◽  
Upflow Anaerobic Sludge Blanket ◽  
Uasb Reactor ◽  
Anaerobic Sludge ◽  
Sulfide Removal ◽  
Dissolved Sulfide ◽  
Removal Efficiencies ◽  
Anaerobic Sludge Blanket

Abstract Two bioreactors were investigated as an alternative for the post-treatment of effluent from an upflow anaerobic sludge blanket (UASB) reactor treating domestic sewage, aiming at dissolved sulfide and methane removal. The bioreactors (R-control and R-air) were operated at different hydraulic retention times (HRT; 6 and 3 h) with or without aeration. Large sulfide and methane removal efficiencies were achieved by the microaerated reactor at HRT of 6 h. At this HRT, sulfide removal efficiencies were equal to 61% and 79%, and methane removal efficiencies were 31% and 55% for R-control and R-air, respectively. At an HRT of 3 h, sulfide removal efficiencies were 22% (R-control) and 33% (R-air) and methane removal did not occur. The complete oxidation of sulfide, with sulfate formation, prevailed in both phases and bioreactors. However, elemental sulfur formation was more predominant at an HRT of 6 h than at an HRT of 3 h. Taken together, the results show that post-treatment improved the anaerobic effluent quality in terms of chemical oxygen demand and solids removal. However, ammoniacal nitrogen was not removed due to either the low concentration of air provided or the absence of microorganisms involved in the nitrogen cycle.

scholarly journals Quali-quantitative characterization of biogas with the temporal behavior of organic load on wastewater treatment plant with upflow anaerobic sludge blanket reactors through measurement in full‑scale systems

2021 ◽  
Vol 56 (4) ◽  
pp. 621-629
Author(s):  
Orlando Antonio Duarte Hernandez ◽  
Ana Caroline Paula ◽  
Gustavo Rafael Collere Possetti ◽  
Mauricio Pereira Cantão ◽  
Miguel Mansur Aisse
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Full Scale ◽  
Upflow Anaerobic Sludge Blanket ◽  
Organic Load ◽  
Anaerobic Sludge ◽  
Time Behavior ◽  
Flow Meter ◽  
Anaerobic Sludge Blanket

This study aims to present the time behavior of wastewater flow parameters, organic matter, biogas flow, biogas composition, and its relations, measured through online sensors, in a municipal wastewater treatment plant (WWTP) operating full-scale upflow anaerobic sludge blanket (UASB) reactors, installed in the south of Brazil. WWTP has online measurement devices to evaluate some physicochemical variables of the sewage and the biogas. The COD analyzer (UV– Vis probe), ultrasonic flow meter, biogas flow meter, and biogas composition analyzer were the equipment used. The monitoring occurred for two time periods each of 72 h and one time period for 48 h in the year 2018. Data were checked with descriptive statistics, data independence was checked through the autocorrelation Box– Ljung test, normality behavior was checked with several tests (Shapiro– Wilk, Kolmogorov–Smirnov, Lilliefors, Anderson–Darling, D’Agostino K2, and Chen–Shapiro), and Spearman’s correlation coefficient was used to evaluate the correlations among the parameters. The mean sewage flow was 345 ± 120 L.s-1; removed organic load was, in average, 48%; biogas quality values were 82.32% ± 3.62% v/v (CH4), 2.66% ± 1.19% v/v (CO2), and 3453 ± 1268 ppm (H2S); and the production per capita obtained was 4.51 ± 1.65 NL.hab-1.d-1. It was estimated an electric power generation of 3118.6 kWh.d-1, which is equivalent to an installed power of 130 KW. The behavior of removed organic load and biogas flow (Nm3.h-1), produced in the treatment plant, showed variable, periodic, and nonstationary time behavior.  

scholarly journals Removal of COD, NH4-N, and perfluorinated compounds from wastewater treatment plant effluent using ZnO-coated activated carbon

2020 ◽  
Author(s):  
Jiawei Tang ◽  
Yu Liu ◽  
Peidong Su ◽  
Jingwei Quan ◽  
Yufeng Hu ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Wastewater Treatment Plant ◽  
Contact Time ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Perfluorinated Compounds ◽  
Optimal Dosage ◽  
Membrane Diffusion ◽  
Removal Efficiencies

Abstract This study investigated the removal of chemical oxygen demand (COD), NH4-N, and perfluorinated compounds (PFCs) in the effluent from a wastewater treatment plant (WWTP) using ZnO coated activated carbon (ZnO/AC). Results suggested that the optimal dosage of the ZnO/AC was 0.8 g/L within 240 min of contact time, at which the maximum removal efficiency of COD was approximately 86.8%, while the removal efficiencies of PFOA and PFOS reached 86.5% and 82.1%. In comparison, the removal efficiencies of NH4-N, PFBA, and PFBS were lower, at approximately 47.9%, 44.0%, and 55.4%, respectively. In addition, COD was preferentially adsorbed before PFCs and NH4-N, when the contact time ranged from 0 to 180 min, and the order of PFCs removal showed a positive correlation with C-F chain length. The kinetic study revealed that the removal of COD, NH4-N, and PFCs could be better depicted and predicted by the Lagergren quasi-second order dynamic model with high correlation coefficients, which involved liquid membrane diffusion, intraparticle diffusion, and photocatalytic reactions. The saturated ZnO/AC was finally regenerated using ultrasound for 3 h and retained excellent performance, which proved it could be considered as an effective and alternative technology.

scholarly journals Swine wastewater treatment using an anaerobic baffled (ARB) and a UASB reactor system

2017 ◽  
Vol 38 (6) ◽  
pp. 3705
Author(s):  
Luciano Dos Santos Rodrigues ◽  
Ana Cristina Araujo Pinto ◽  
Joyce Da Cruz Ferraz Dutra ◽  
Renata Rodrigues Sampaio ◽  
Stella Rubim de Sousa ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Suspended Solids ◽  
Oxygen Demand ◽  
Upflow Anaerobic Sludge Blanket ◽  
Swine Wastewater ◽  
Uasb Reactor ◽  
Anaerobic Sludge ◽  
Promising Alternative ◽  
The Mean ◽  
Anaerobic Sludge Blanket

The purpose of this study was to assess the swine wastewater treatment system, consisting of the anaerobic baffled reactor (ABR), followed by the upflow anaerobic sludge blanket (UASB) reactor at full scale. The system was monitored by analyzing samples collected in the influent and effluent of ABR and UASB. The following parameters were analyzed: temperature, pH, total suspended solids (TSS), volatile suspended solids (VSS), biochemical oxygen demand (BOD), and chemical oxygen demand (COD). Averages of total removal of COD and BOD were 96.7 and 98.4%, respectively. The mean concentrations of COD, BOD, TSS, and VSS at the final effluent were 611, 124, 138, and 134 mg L-1, respectively. The mean volumetric organic loadings (VOL) at the ABR and UASB were 10.29 and 0.99 kg COD m-1d-1. Therefore, the ABR-UASB system was found to be a promising alternative for the swine wastewater treatment.

scholarly journals Domestic Wastewater Treatment: A Comparison between an Integrated Hybrid UASB-IFAS System and a Conventional UASB-AS System

2021 ◽  
Vol 13 (4) ◽  
pp. 1853
Author(s):  
Ayman M. Dohdoh ◽  
Ibrahim Hendy ◽  
Martina Zelenakova ◽  
Ahmed Abdo
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
High Efficiency ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Pilot Scale ◽  
Climatic Conditions ◽  
Upflow Anaerobic Sludge Blanket ◽  
Anaerobic Sludge

The current study presents a detailed evaluation and comparison between two integrated anaerobic–aerobic systems for biological wastewater treatment under equal conditions in all aspects (wastewater characteristics, climatic conditions, reactor sizing, and even the measurement methods). The two examined systems are (i) a hybrid upflow anaerobic sludge blanket (hybrid UASB) coupled with integrated fixed-film activated sludge (IFAS) and (ii) a conventional UASB coupled with activated sludge (AS). The present comparative study aims to evaluate and assess the effect of adding carrier-filling media on the performance of the classical integrated UASB-AS. The two parallel pilot-scale systems, hybrid UASB-IFAS and UASB-AS, were installed and operated at a wastewater treatment plant. Three sets of experiments were conducted to examine the influence of the hydraulic retention time (HRT) on the consequent organic and hydraulic loads, temperature, and recirculation rate of the proposed systems. The main results showed that the two investigated systems had a comparably high efficiency for the removal of organic matters and ammonia. Moreover, a paired sample t-test indicated there was a statistically significant effect of the filling media, and the performance of the hybrid UASB-IFAS increased significantly compared with that of the UASB-AS system. An additional benefit of the filling media on the hybrid system was its high stability when changing the organic and hydraulic loads. The optimum HRT was 6 h, with a total chemical oxygen demand (TCOD) percentage removal of approximately 95% in both examined systems. Treatment of sewage under high and low temperatures indicated that increasing the temperature improved the efficiency of the overall process for both systems significantly.

scholarly journals A simple field essay for detecting departures from expected performance in small-scale, remote or rural wastewater treatment plants

2020 ◽  
Vol 82 (7) ◽  
pp. 1380-1392
Author(s):  
Marcos von Sperling ◽  
Emmanuelle Machado Maia Nogueira Lima ◽  
Mirene Augusta de Andrade Moraes
Keyword(s):  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Upflow Anaerobic Sludge Blanket ◽  
Uasb Reactor ◽  
Small Scale ◽  
Anaerobic Sludge ◽  
Effluent Quality ◽  
Pet Bottles ◽  
Coarse Filter

Abstract A scientific basis is given to the traditional method of inferring effluent quality based on visualization of samples in transparent flasks. A scale of 1–6, with different printed grey intensities, is placed behind transparent PET bottles containing the sample, and gives an indication of the range of turbidity in the sample (1 is the most transparent and can only be visualized if the effluent is well clarified; in the other spectrum, 6 is the darkest and indicates highly turbid effluents). Turbidity has been correlated with total suspended solids (TSS), particulate biochemical oxygen demand (BOD) and particulate chemical oxygen demand (COD) based on thousands of monitored data collected in the effluent from seven different treatment processes in Brazil: upflow anaerobic sludge blanket (UASB) reactor, trickling filters, activated sludge, horizontal wetland, vertical wetland, polishing ponds and coarse filter after pond. The method is simple and instantaneous, can be used in virtually all places and in every visit of the operator to the remote treatment plant, allows recording of the image in smartphones, does not use any equipment, chemicals or energy, and has been showed to represent well the effluent quality of existing treatment plants. This essay is complementary and does not substitute specific traditional sampling and analysis, but allows easy inference of deterioration of effluent quality.

Sequential UASB and dual media packed-bed reactors for domestic wastewater treatment – experiment and simulation

2016 ◽  
Vol 73 (12) ◽  
pp. 2959-2970 ◽  
Author(s):  
Raúl Rodríguez-Gómez ◽  
Gunno Renman
Keyword(s):  
Wastewater Treatment ◽  
Pathogenic Bacteria ◽  
Oxygen Demand ◽  
Filter Material ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Upflow Anaerobic Sludge Blanket ◽  
Uasb Reactor ◽  
Anaerobic Sludge ◽  
P Removal

Abstract A wastewater treatment system composed of an upflow anaerobic sludge blanket (UASB) reactor followed by a packed-bed reactor (PBR) filled with Sorbulite® and Polonite® filter material was tested in a laboratory bench-scale experiment. The system was operated for 50 weeks and achieved very efficient total phosphorus (P) removal (99%), 7-day biochemical oxygen demand removal (99%) and pathogenic bacteria reduction (99%). However, total nitrogen was only moderately reduced in the system (40%). A model focusing on simulation of organic material, solids and size of granules was then implemented and validated for the UASB reactor. Good agreement between the simulated and measured results demonstrated the capacity of the model to predict the behaviour of solids and chemical oxygen demand, which is critical for successful P removal and recovery in the PBR.

scholarly journals Modelling and Life Cycle Assessment of Sewage Treatment Plant (STP) in Lucknow City

2021 ◽  
Vol 9 (VII) ◽  
pp. 3793-3803
Author(s):  
Narendra Pal Gole
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Water Concentration ◽  
Domestic Wastewater ◽  
Upflow Anaerobic Sludge Blanket ◽  
Uasb Reactor ◽  
Anaerobic Sludge

The implementation of wastewater treatment plants has been a challenge for most countries. Economic resources, political will, institutional strength, and cultural background are important factors that define the trajectory of pollution control in many countries. Technology is sometimes mentioned as one of the reasons hindering further development. Therefore, a key objective of this research is to evaluate the performance of a plant based on the 345 MLD Upflow Anaerobic Sludge Blanket (UASB) technology by analyzing the physical and chemical parameters of the water treated by UASB to evaluate the performance of the plant located. at Bharwara Tech from Gomti Nagar Lucknow. In this study, the performance of the wastewater treatment plant and the UASB reactor was calculated. Wastewater is mixed with domestic wastewater, so the concentration of BOD and COD is relatively low. The amount of biogas produced by the UASB reactor is also less than its design value. All STP inlet and outlet water concentration results are displayed graphically.

Treatment of sulfide-rich UASB effluent: comparison of poly-aluminium chloride and iron-salts

2012 ◽  
Vol 7 (2) ◽  
Author(s):  
N. N. Rao ◽  
Tapas Nandy
Keyword(s):  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Aluminium Chloride ◽  
Upflow Anaerobic Sludge Blanket ◽  
Uasb Reactor ◽  
Anaerobic Sludge ◽  
Sulfide Removal ◽  
Treated Effluent ◽  
High Concentrations

Coagulation treatment of sulfide-rich effluent from an upflow anaerobic sludge blanket (UASB) reactor in a full-scale Sewage Treatment Plant (STP) is reported. The STP treats combined wastewater from tanneries and sewage, however, the treatment in the existing UASB reactor was not optimal. This resulted in high concentrations of chemical oxygen demand (COD), 530–590 mg/L; biochemical oxygen demand (BOD), 180–210 mg/L; and sulfide, 142–161 mg/L in the treated effluent. The high concentrations of sulfide in the UASB effluent resulted in higher oxygen demand. Therefore, further treatment of UASB effluent was necessary to comply with the discharge standards. In the present study, polyaluminium chloride (PACl, liquid & solid-type), ferric alum and Fe-salts (ferrous sulfate and ferric chloride) were used as coagulants and their effectiveness was compared. Optimization of doses of the chosen coagulants/salts, were carried out with the objective of achieving discharge standards with respect to COD, BOD and sulfide. Application of optimized dose of Ecorite PACl-2018 (0.378 mmol/L Al) and PACl (other brand, OB, 0.684 mmol/L Al) resulted in 68.0–80.0% TSS (total suspended solids), 13.0–18.0% COD, 26.0–35.0% BOD and 58.5–59.2% sulfide removal. On the other hand, use of Fe-salts lead to enhanced removal of pollutants; 80.0–83.0% TSS, 57.0–60.7% COD, 88.0–89.0% BOD and 99.0–99.4% sulfide. The Fe-salts were found to be more effective for sulfide removal as FeS. Such efficient removal of sulfide leads to decrease in COD and BOD concentrations and ensures compliance of final treated effluent from STP with the discharge standards.

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