Drop in Conductivity of Sewage Sludge in the Process of Autothermal Thermophilic Aerobic Digestion

Bartkowska, Izabela

doi:10.12911/22998993/74280

Cited by 4 publications

(4 citation statements)

References 10 publications

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“…For this reason, the biological process could be inhibited due to the acidification of the medium in case this waste is used as a co-substrate and it has been discarded for being used in anaerobic digestion. On the other hand, EC measurements showed average values for pig slurry and wet fatty pomace around 18 and 20 mS/cm, respectively, which are similar to the range usually obtained for the sewage sludge that enters an anaerobic digester in conventional activated sludge WWTPs [41]. The whey sample showed a lower value (around 8 mS/cm), indicating a weak presence of salts in this waste.…”

Section: Physico-chemical Analysessupporting

confidence: 81%

Multi-Parametric Analysis Based on Physico-Chemical Characterization and Biochemical Methane Potential Estimation for the Selection of Industrial Wastes as Co-Substrates in Anaerobic Digestion

Ruiz,

Fernández,

Genaro

et al. 2023

Energies

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Anaerobic digestion is considered as one of the most feasible waste-to-energy technologies for the valorization of organic wastes. It can be applied to many different substrates but the mono-digestion of a single substrate usually has some important drawbacks due to the physico-chemical characteristics of the substrate. A feasible solution is the simultaneous co-digestion of several substrates with different composition and characteristics, so that synergetic effects may be generated and physico-chemical characteristics may be compensated, thus reaching higher process efficiencies and biogas production rates. In this work, a multi-parametric analysis for the objective comparison of industrial wastes was developed in order to help with decision making about their suitability as a co-substrate in anaerobic co-digestion. Criteria considered for this analysis included sample composition, C/N ratios, theoretical biochemical methane potential (BMP), and other important issues such as production rates, seasonality, and the distance to the WWTP or pre-treatment requirements. Results showed that, among the 13 evaluated wastes, 2 of them showed a higher potential for being used in anaerobic co-digestion: 1. Fried corn from the snack food industry and 2. Wet fatty pomace from the olive oil industry. Both wastes showed high estimated BMP values, high lipid and carbohydrate content, and C/N ratios in a proper range to improve the low C/N ratio of sewage sludge. Other wastes such as olive pomace (dry), skinless corn (not fried), and grape pomace from the winery industry may also be used as co-substrates. As a conclusion, this procedure based on a selection matrix can be considered as a useful tool to help both producers and WWTP operators to make decisions about the potential applicability of specific industrial wastes as co-substrates in anaerobic co-digestion.

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Section: Physico-chemical Analysessupporting

confidence: 81%

Multi-Parametric Analysis Based on Physico-Chemical Characterization and Biochemical Methane Potential Estimation for the Selection of Industrial Wastes as Co-Substrates in Anaerobic Digestion

Ruiz,

Fernández,

Genaro

et al. 2023

Energies

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“…Operators implement new solutions to improve sludge processing. Since 2003 in Poland, the autothermal thermophilic aerobic digestion (ATAD) installations started to be built (Bartkowska, 2017). At the moment, there are 11 ATAD installations in the country, located in the municipal wastewater treatment plants.…”

Section: Introductionmentioning

confidence: 99%

“…The ATAD installation enables simultaneous stabilization and hygienic treatment of sludge. It occupies a small area, the reactors are fully air tightened and the installed equipment allows to remove gaseous pollutants (Augustin et al, 2007;Bartkowska, 2017). These are huge advantages improving technological processes in the treatment plants, but they exert negative effects in the environment.…”

Section: Introductionmentioning

confidence: 99%

Studia Quaternaria

Boruszko,

Wojciula

2022

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This paper presents the concentrations of the polycyclic aromatic hydrocarbons (PAH) and heavy metals in leachates from the autothermal thermophilic aerobic digestion (ATAD). The leachates from ATAD installations (Dąbrowa Białostocka, Hajnówka, Pisz, Olecko, Giżycko, Wysokie Mazowieckie) located in Poland were tested. The concentrations of PAHs in samples from Pisz, Giżycko, Wysokie Mazowieckie and Hajnówka were similar to those in industrial wastewater. The cluster analysis confirmed that in sites with a higher polyethylene (p.e.) input from the industrial sector, the leachates were more contaminated with PAH compounds. In samples from Dąbrowa Białostocka, Olecko, Pisz and Hajnówka, the heavy fraction of PAHs compounds prevailed over the light fraction. Concentrations of heavy metals in leachates from ATAD varied. The Ward’s method isolated the wastewater treatment plant in Giżycko. The p.e. from the industrial sector was the highest for this facility. Also, the samples from ATAD had the highest total concentration of heavy metals (5.87 mg/l). The leachates from ATAD are returned to biological systems of municipal sewage treatment plants, where they can be combined into more toxic compounds. Biological wastewater treatment processes do not ensure the removal of PAHs and heavy metals from the wastewater. As a result, harmful compounds can get into the water or ground, polluting the environment.

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“…Nowadays, the sewage sludge stabilization technology which involves the process of autothermal termophilic aerobic sewage sludge digestion (ATAD) is more popular in Poland [ Bartkowska 2017]. The process can be applied both in the municipal and industrial WWTPs with per-sonal equivalent (PE) up to 30.000 or flow capacity is up to 20.000 m 3 /day [Bartkowska & Dzienis 2007, Bartkowska 2016.…”

Section: Introductionmentioning

confidence: 99%

Application of SS-VF Bed for the Treatment of High Concentrated Reject Water from Autothermal Termophilic Aerobic Sewage Sludge Digestion

2018

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The autothermal termophilic aerobic digestion (ATAD) technology is used in the municipal and industrial wastewater treatment plants (WWTPs) with personal equivalent up to 30.000. The process provides a high level of sewage sludge stabilization and its hygienization. The main operation problems are caused by the high concentration of nitrogen and phosphorus in the reject water from sewage sludge treatment and air purification (odor removal). Reject water usually is returned to the main sewage treatment, which has a negative impact, especially on the sewage treatment systems based on the sequence batch reactors (SBR). Applying high-performance and expensive separate reject water treatment methods such as SHARON, Anammox or CANON in small facilities is not justified economically. The article presents the research results concerning the effectiveness of applying subsurface vertical flow constructed wetlands (SS VF) for reject water treatment from the ATAD process. An innovative type of bed filling was used, which was produced from waste (ash from a heat and power plant). The efficiency of reject water treatment during the research period was on average at 45.6% for ammonia nitrogen, 32.3% for total phosphorus and 85.1% for BOD 5. Applying SS VF beds for separate reject water treatment might ensure a stable and effective functioning of municipal WWTPs by decreasing the load of biological part of a WWTP.

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Drop in Conductivity of Sewage Sludge in the Process of Autothermal Thermophilic Aerobic Digestion

Cited by 4 publications

References 10 publications

Multi-Parametric Analysis Based on Physico-Chemical Characterization and Biochemical Methane Potential Estimation for the Selection of Industrial Wastes as Co-Substrates in Anaerobic Digestion

Multi-Parametric Analysis Based on Physico-Chemical Characterization and Biochemical Methane Potential Estimation for the Selection of Industrial Wastes as Co-Substrates in Anaerobic Digestion

Studia Quaternaria

Application of SS-VF Bed for the Treatment of High Concentrated Reject Water from Autothermal Termophilic Aerobic Sewage Sludge Digestion

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