Estimation of biokinetic parameters in the acid fermentation of primary sludge using an anaerobic baffled reactor

Kurniawan, Allen; Wirasembada, Yanuar Chandra; Park, Ki Young; Kim, Young Beom; Hur, Jin; Cho, Jinwoo

doi:10.1039/c8ew00566d

Cited by 5 publications

(11 citation statements)

References 39 publications

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“…Model konvensional biokinetika pertumbuhan mikroorganisme diperoleh melalui Persamaan Monod. Persamaan ini terus dimodifikasi sehingga menghasilkan model persamaan seperti Ming, Aborhey dan Williamson, dan Jerusalimski (Díaz et al, 2021;Kurniawan et al, 2018;Gonzalez, 2016;Stoychev et al, 2020). Parameter umum biokinetika meliputi laju pertumbuhan spesifik maksimum mikroorganisme (μmax), konsentrasi saturasi setengah jenuh (Ks), koefisien produksi sintesis sel (Y), dan laju kematian mikroorganisme (Ke).…”

Section: Latar Belakangunclassified

Model Biokinetika Sistem Kontak Stabilisasi Lumpur Air Lindi Berdasarkan Pengaruh Fosfor dan Variasi Waktu Detensi Unit Kontak

Kahendran,

Notonugroho,

Arif

et al. 2023

J. Ilmu Lingk.

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ABSTRAK Tempat pemrosesan akhir sampah menghasilkan air lindi dalam kuantitas besar sehingga membutuhkan alternatif unit pengolahan biologis, seperti kontak stabilisasi untuk mereduksi kontaminan. Penelitian ini bertujuan untuk mengevaluasi kinerja unit kontak berdasarkan variasi waktu detensi (HRT) pada kondisi aliran tidak tunak serta menentukan estimasi parameter biokinetika di dalam persamaan model pertumbuhan mikroorganisme. Penelitian diawali dengan mengkonfigurasi unit kontak stabilisasi, menganalisis parameter kualitas air limbah, dan memprediksi parameter biokinetika untuk memperkirakan kualitas air limbah. Validasi nilai biokinetika dilakukan dengan menggunakan metode matematis dan jaringan saraf tiruan (JST). Fungsi penggunaan JST dalam estimasi chemical oxygen demand (COD) efluen tangki kontak dapat dilakukan dengan cepat, memperkecil kesalahan perhitungan estimasi dengan metode matematis, serta bebas digunakan pada kondisi apapun. Berdasarkan hasil penelitian, persentase efisiensi COD pada masing-masing HRT unit kontak 2, 3, dan 4 jam berturut-turut sebesar 26,9%; 35,1%; dan 46,5%. Pengaruh biokinetika terhadap unit pengolahan unit kontak tidak hanya untuk memprediksi pengolahan air limbah, tetapi juga untuk merancang, mengoperasikan, dan mengontrol sistem pengolahan. Berdasarkan metode statistika, model estimasi konsentrasi COD efluen tangki kontak terbaik adalah model dari model JST. Akan tetapi, model ini hanya mengestimasi konsentrasi efluen tanpa memperhitungkan nilai biokinetika. Model Jerusalimski menjadi pilihan terbaik dibandingkan Model Ming untuk mengestimasi nilai biokinetika Ke, Y, μmax, dan Ks berturut-turut sebesar 0,025 hari-1; 28,25 mgMLVSS/mg COD; 3,4 hari-1; dan 21,46 mg/L berdasarkan pengaruh fossfor dan waktu detensi pada kondisi tidak tunak. Peningkatan konsentrasi fosfor di dalam proses pengolahan akan memengaruhi dekomposisi mikroorganisme di dalam biomassa untuk mengambil oksigen terlarut dalam jumlah besar sehingga pertumbuhan mikroorganisme terhambat.Kata kunci: biokinetika, fosfor, jaringan saraf tiruan, kontak stabilisasi, lindi, waktu detensi.ABSTRACT Landfills produce large quantities of leachate that pollutes the water system water pollution, requiring a contact stabilization treatment unit to reduce the high contaminant in the leachate. This study aims to evaluate the performance of the contact unit based on the variation of hydraulic retention time (HRT) under an unsteady state and to estimate the biokinetic parameters by using the microorganism growth model equation. The research was started by configurating the contact stabilization tank, analyzing the wastewater quality parameters, and predicting biokinetics parameters to estimate water quality effluent and design engineering. Biokinetic values were validated using mathematical methods and artificial neural networks (ANN). The function of using ANN in estimating of contact tank effluent chemical oxygen demand (COD) can be done quickly, minimizes estimation errors using mathematical methods and can be used in any condition. Based on research results, the percent removal of COD efficiency in each HRT contact tank of 2, 3, and 4 hours, were 26.9%; 35.1%; and 46.5%, respectively. The effect of biokinetics on contact tank treatment units is not only to predict wastewater treatment, but also to design, operate and control treatment systems. Based on the statistical analysis, the ANN model was the best model for estimating the contact tank effluent concentration. However, the ANN model provided the estimated effluent concentration without considering biokinetic values in detail. The Jerusalimski model is the best fit model compared to the Ming model to estimate the biokinetic values of Ke, Y, μmax, and Ks of 0.025 day-1, 28.25 mgMLVSS/mg COD, 3.4 day-1, and 21.46 mg/L; respectively, based on the effect of phosphorus and detention time in unsteady state. Increasing the phosphorus concentration in the treatment processing will affect the decomposition of microorganisms in the biomass to take up large amounts of dissolved oxygen until the growth of microorganisms is inhibited.Keywords: artificial neural network, biokinetic, contact stabilization, hydraulic retention time, leachate, phosporus

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Section: Latar Belakangunclassified

Model Biokinetika Sistem Kontak Stabilisasi Lumpur Air Lindi Berdasarkan Pengaruh Fosfor dan Variasi Waktu Detensi Unit Kontak

Kahendran,

Notonugroho,

Arif

et al. 2023

J. Ilmu Lingk.

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“…Di dalam proses anaerobik digester, parameter biokinetika terus mengalami perkembangan berdasarkan pendekatan proses yang kompleks. Salah satu metode estimasi biokinetika mencakup parameter koefisien pertumbuhan maksimum mikroorganisme (μmax), konsentrasi saturasi setengah jenuh (KS), koefisien laju transportasi hidrolisis substrat (k), koefisien hasil biomassa (Y), koefisien laju hidrolisis substrat (Kh), dan laju kematian mikroorganisme (b) di dalam satu pendekatan formula persamaan (Barthakur et al, 1991;Faisal & Unno, 2001;Zinatizadeh et al, 2006;Kurniawan et al, 2018). Parameterparameter biokinetika tersebut dikembangkan berdasarkan modifikasi Persamaan Monod dan dikombinasikan dengan input variabel proses hidrolisis sebagai fase awal proses anaerobik pada kondisi steady state.…”

Section: Pendahuluanunclassified

“…Proses anaerobik digester diasumsikan melibatkan tiga fase utama, yaitu hidrolisis senyawa kompleks menjadi substrat asimilasi terlarut, pengangkutan substrat asmiliasi terlarut untuk diabsorb ke dalam sel, dan pemanfaatan substrat yang dapat diasimilasi untuk sel pertumbuhan dan pembentukan produk hasil (Borja et al, 1995;Faisal & Unno, 2001;Kurniawan et al, 2018). Dengan mempertimbangkan variabel-variabel pada Gambar 2, fase pertama berupa hidrolisis senyawa kompleks karbohidrat, protein, dan lemak yang dilakukan oleh enzim ekstraseluler untuk diubah menjadi senyawa selulosa, proteinase, dan lipase (Vavilin et al, 2008).…”

Section: Pengembangan Modelunclassified

“…Nilai μmax sebesar 0,559 hari -1 memberikan penilaian terhadap konsentrasi biomassa aktif yang cukup tinggi di dalam reaktor. Nilai ini relatif lebih tinggi dibandingkan nilai pada unit fermentasi asam sebesar 0,462 hari -1 (Kurniawan et al, 2018), modifikasi unit ABR sebesar 0,21 hari -1 (Zinatizadeh et al, 2006), dan high rate upflow anaerobic sludge fixed film bioreactor sebesar 0,31 hari -1 (Faisal & Unno, 2001). Nilai KS rendah sebesar 0,209 mg/L pada Tabel 4 menunjukkan kemampuan afinitas yang tinggi mikroorganisme terhadap substrat.…”

Section: Parameter Biokinetika Proses Post-denitrifikasiunclassified

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Model Estimasi Biokinetika Untuk Proses Post-Denitrifikasi Air Limbah Domestik Pada Unit Anaerobic Baffled Reactor

Kurniawan

Amelia

Wirayudhatama

et al. 2021

JSDA

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This study developed a combination of Continuous Stirred Tank Reactor (CSTR) for the acid fermentation and the Anaerobic Baffled Reactor (ABR) post-denitrification through high nitrite injection. Volatile Fatty Acids (VFAs) as a substrate for the post-denitrification process were optimally produced in the acid fermentation process. The aim of this study was to obtain the estimation of biokinetic values to predict the effluent wastewater quality in ABR post-denitrification process under unsteady state. The reactor was operated for HRT 7 days at temperature 25-28 ˚C and pH 6-7,2. The influent and effluent substrate concentration were monitored continuously for 160 days. Post-denitrification biokinetic from the Contois equation resulted in the value of hydrolysis rate (Kh) of 0.077 day-1, the substrate transport rate (k) of 4.364×10-6 Lmg-1day-1, maximum specific growth rate (μmax) of 0.559 day-1, half saturation constant (KS) of 0.209 mgL-1, microbial decay coefficient (b) of 0.0145 days-1; yield coefficient (Y) of 0.084 g-VSSg-COD-1. The validation of biokinetic parameters based on statistical analysis showed fairly precise results following the trend of experimental data to determine the substrate concentration in the effluent unit. Therefore, the biokinetic values can be applied in the design of ABR post-denitrification using primary sludge incorporation with high strength nitrate.Keywords: Anaerobic baffled reactor, biokinetics, Contois, hydrolysis, post-denitrification.

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“…Nevertheless, many studies have been dedicated to merely biological models like the International Water Association (IWA) activated sludge models (ASM1, ASM2, ASM2d, ASM3) [19] which take into account the biological processes that transform organic containments to biomass and safe materials. [20][21][22] Since the reactors are considered as one or a cascade of ideal continuous stirred tank reactors (CSTRs) or ideal plug flow reactors (PFR), [23] the effects of hydrodynamic parameters of the bioreactor are not reflected in this modelling approach. Consequently, the biokinetic models shall be coupled with hydrodynamic models.…”

Section: Introductionmentioning

confidence: 99%

A coupled hydrodynamic‐biokinetic simulation of three‐phase flow in an oxidation ditch using CFD

et al. 2021

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Coupling the hydrodynamic and biokinetic models, was done on a lab-scale oxidation ditch as the bioreactor of the activated sludge process and validated against the available experimental data. The simulation was carried out in three-phase, three-dimensional conditions with k-є and Eulerian-Eulerian methods. A simplified activated sludge model No.1 (ASM1) has been added to transport terms to account for the biokinetic model. Rotatory speed for surface aerator was initially increased and its corresponding effects on solid volume fraction, dissolved oxygen, and velocity profile and values were observed. A 150 rpm increase in the rotational velocity resulted in 36% higher average liquid phase velocity for the one-aerator arrangement, which was 3% more than that of the two-aerator oxidation ditch. The 150% increase in the solid volume fraction led to a 10% reduction in the maximum liquid phase velocity. The effect of aerators number has been considered explicitly on baffle performance and liquid phase velocity profile. Finally, a new design for the aerator has been offered that provides an ordered flow field and optimal conditions for the performance of the baffle and oxidation process.

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Estimation of biokinetic parameters in the acid fermentation of primary sludge using an anaerobic baffled reactor

Abstract: Biokinetic models of anaerobic baffled reactor (ABR) type-acid fermentation with a short hydraulic retention time (HRT) of four days were proposed for obtaining high concentrations of volatile fatty acids (VFAs) based on the dynamic microbial growth rate.

Cited by 5 publications

References 39 publications

Model Biokinetika Sistem Kontak Stabilisasi Lumpur Air Lindi Berdasarkan Pengaruh Fosfor dan Variasi Waktu Detensi Unit Kontak

Model Biokinetika Sistem Kontak Stabilisasi Lumpur Air Lindi Berdasarkan Pengaruh Fosfor dan Variasi Waktu Detensi Unit Kontak

Model Estimasi Biokinetika Untuk Proses Post-Denitrifikasi Air Limbah Domestik Pada Unit Anaerobic Baffled Reactor

A coupled hydrodynamic‐biokinetic simulation of three‐phase flow in an oxidation ditch using CFD

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