Water Treatment Plant Sludge Discharge to Wastewater Treatment Works: Effects on the Operation of Upflow Anaerobic Sludge Blanket Reactor and Activated Sludge Systems

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.

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Wet flue gas desulfurization wastewater treatment with reclaimed water treatment plant sludge: a case study

Water Science & Technology ◽

10.2166/wst.2018.525 ◽

2018 ◽

Vol 78 (11) ◽

pp. 2392-2403 ◽

Cited By ~ 1

Author(s):

Hong Chen ◽

Yiyu Wang ◽

Yanxiao Wei ◽

Liang Peng ◽

Bo Jiang ◽

...

Keyword(s):

Wastewater Treatment ◽

Water Treatment ◽

Flue Gas ◽

Thermal Power ◽

Treatment Plant ◽

Water Treatment Plant ◽

Flue Gas Desulfurization ◽

Hunan Province ◽

Wastewater Treatment Process ◽

Water Treatment Plant Sludge

Abstract To upgrade a wet flue gas desulfurization (FGD) wastewater treatment process in a typical thermal power plant (TPP) in Hunan province, China, a new concept for reusing polyaluminum chloride (PAC)-based water treatment plant sludge (WTPS) as a coagulant is proposed. Results show that, for an optimal WTPS dosage of 1,000 mg/L, the corresponding removal capacities for suspended solids (SS) and chemical oxygen demand (COD) from the practical FGD wastewater were 58.3% and 40.3%, respectively. Through an advanced treatment with a dosage of 50 mg/L of PAC, pH of 9, and stirring of 150 r/min for 60 s and 50 r/min for 15 min, the total removal efficiencies of SS, COD, and total cadmium (Cd) from the FGD wastewater were 93.7%, 88.8%, and 84.6%, respectively. Therefore, a new modification process (that involves mixing with WTPS – slag cleaner – neutralization – coagulation – sedimentation) was proposed. The proposed process is economically superior, and the average cost for the FGD wastewater treatment was only 1.08 USD/t. This could provide a cost-effective alternative process for upgrading FGD wastewater treatment facilities of TPPs.

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

Sustainability ◽

10.3390/su13041853 ◽

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.

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Life cycle assessment of upflow anaerobic sludge blanket sludge management and activated sludge systems aiming energy use in the municipality of Itajubá, Minas Gerais, Brazil

Journal of Material Cycles and Waste Management ◽

10.1007/s10163-021-01253-0 ◽

2021 ◽

Author(s):

Susan Johana Benites Cañote ◽

Regina Mambeli Barros ◽

Electo Eduardo Silva Lora ◽

Ivan Felipe Silva dos Santos ◽

Ana Paula Moni Silva ◽

...

Keyword(s):

Life Cycle Assessment ◽

Life Cycle ◽

Activated Sludge ◽

Energy Use ◽

Minas Gerais ◽

Upflow Anaerobic Sludge Blanket ◽

Anaerobic Sludge ◽

Sludge Management ◽

Anaerobic Sludge Blanket ◽

Activated Sludge Systems

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Indigenous copper resistant bacteria isolated from activated sludge of water treatment plant in Surabaya, Indonesia

Biodiversitas Journal of Biological Diversity ◽

10.13057/biodiv/d211112 ◽

2020 ◽

Vol 21 (11) ◽

Author(s):

Irawati Wahyu ◽

REINHARD PINONTOAN ◽

TRIWIBOWO YUWONO

Keyword(s):

Heavy Metals ◽

Wastewater Treatment ◽

Water Treatment ◽

Activated Sludge ◽

Treatment Plant ◽

Dry Weight ◽

Water Treatment Plant ◽

Industrial Plant ◽

Resistant Bacteria ◽

Biological Wastewater Treatment

Abstract. Irawati W, Pinontoan R, Yuwono T. 2020. Indigenous copper resistant bacteria isolated from activated sludge of water treatment plant in Surabaya, Indonesia. Biodiversitas 21: 5077-5084. Biological wastewater treatment using activated sludge is a promising wastewater treatment solution for removing heavy metals. To improve the effectiveness of biological wastewater treatment, activated sludge must consist of bacteria that can remove heavy metals through the process of bioaccumulation and biosorption. This study was aimed to isolate indigenous copper resistant bacteria and determining their resistance to copper, as well as analyzing their ability to accumulate and remove copper. Copper resistant bacteria were isolated from activated sludge of water treatment plant in industrial plant in Rungkut, Surabaya. Resistance to copper was analyzed by determining the value of minimum inhibitory concentration (MIC). The ability of bacterial isolates to remove copper was analyzed by atomic absorption spectrophotometer. A total of six highly copper resistant bacteria were isolated and designated as B6.1, C8.1, C9.3, C9.4, C9.5, C10.4 isolates. All isolates were categorized as high resistant bacteria with the MICs of 9-11 mM CuSO4. The two highest copper resistant bacteria were isolates C10.4 and C9.4. The ability of the two isolates to accumulate copper was 8.02 mg and 4.83 mg per gram dry weight of cells and to remove of copper up to 20.45% and 17.66%, respectively.

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Performance evaluation of a large sewage treatment plant in Brazil, consisting of an upflow anaerobic sludge blanket reactor followed by activated sludge

Water Science & Technology ◽

10.2166/wst.2017.284 ◽

2017 ◽

Vol 76 (8) ◽

pp. 2003-2014 ◽

Cited By ~ 4

Author(s):

Pollyane Diniz Saliba ◽

Marcos von Sperling

Keyword(s):

Activated Sludge ◽

Sewage Treatment ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Oxygen Demand ◽

Domestic Sewage ◽

Upflow Anaerobic Sludge Blanket ◽

Anaerobic Sludge ◽

Removal Efficiencies ◽

Anaerobic Sludge Blanket

The objective of this study was to evaluate the behaviour of a system comprising an upflow anaerobic sludge blanket reactor followed by activated sludge to treat domestic sewage. The Betim Central sewage treatment plant, Brazil, was designed to treat a mean influent flow of 514 L/s. The study consisted of statistical treatment of monitoring data from the treatment plant covering a period of 4 years. This work presents the concentrations and removal efficiencies of the main constituents in each stage of the treatment process, and a mass balance of chemical oxygen demand (COD) and nitrogen. The results highlight the good overall performance of the system, with high mean removal efficiencies: BOD (biochemical oxygen demand) (94%), COD (91%), ammonia (72%) and total suspended solids (92%). As expected, this system was not effective for the removal of nutrients, since it was not designed for this purpose. The removal of Escherichia coli (99.83%) was higher than expected. There was no apparent influence of operational and design parameters on the effluent quality in terms of organic matter removal, with the exceptions of the BOD load upstream of the aeration tank and the sludge age in the unit. Results suggest that this system is well suited for the treatment of domestic sewage.

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DESIGN PLANNING WASTEWATER TREATMENT PLANT OF NATA DE COCO INDUSTRY WITH THE ACTIVATED SLUDGE PROCESS

Jurnal Rekayasa Lingkungan ◽

10.29122/jrl.v9i2.1994 ◽

2016 ◽

Vol 9 (2) ◽

Author(s):

Dinda Rita K. Hartaja ◽

Imam Setiadi

Keyword(s):

Waste Water ◽

Wastewater Treatment ◽

Activated Sludge ◽

Waste Water Treatment ◽

Treatment Plant ◽

Water Treatment Plant ◽

Appropriate Technology ◽

Waste Water Treatment Plant ◽

Activated Sludge Process ◽

High Level

Generally, wastewater of nata de coco industry contains suspended solids and COD were high, ranging from 90,000 mg / l. The high level of of the wastewater pollutants, resulting in nata de coco industry can not be directly disposed of its wastewater into the environment agency. Appropriate technology required in order to process the waste water so that the treated water can meet the environmental quality standards that are allowed. Designing the waste water treatment plant that is suitable and efficient for treating industrial wastewater nata de coco is the activated sludge process. Wastewater treatment using activated sludge process of conventional (standard) generally consists of initial sedimentation, aeration and final sedimentation.Keywords : Activated Sludge, Design, IPAL

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