Effects of temperature on white water treatment by the dominant bacteria

Lan, Huixia; Yang, Da; Zhang, Hao; Qiao, Hong-jian; Guo, Chunqian; Lv, Ya-xu; Zhang, Heng

doi:10.1515/npprj-2018-0051

Cited by 2 publications

(2 citation statements)

References 16 publications

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“…Bacillus is a robust model organism for biofilm formation [ 51 ]. Bacillus can not only contribute to O 2 removal [ 52 ], nitrate reduction [ 53 ], and organic matter degradation [ 54 ] but can also secrete EPS, especially EPS-PN, for increasing resistances to adverse environmental stresses [ 55 ]. All these factors may explain why the Bacillus survived after alkaline shock.…”

Section: Resultsmentioning

confidence: 99%

Response and Adaptation of Microbial Community in a CANON Reactor Exposed to an Extreme Alkaline Shock

Yang

Mao

Wang

et al. 2020

Archaea

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Responses of a microbial community in the completely autotrophic nitrogen removal over nitrite (CANON) process, which was shocked by a pH of 11.0 for 12 h, were investigated. During the recovery phase, the performance, anaerobic ammonia oxidation (anammox) activity, microbial community, and correlation of bacteria as well as the influencing factors were evaluated synchronously. The performance of the CANON process deteriorated rapidly with a nitrogen removal rate (NRR) of 0.13 kg·m-3·d-1, and Firmicutes, spore-forming bacteria, were the dominant phyla after alkaline shock. However, it could self-restore within 107 days after undergoing four stages, at which Planctomycetes became dominant with a relative abundance of 64.62%. Network analysis showed that anammox bacteria (Candidatus Jettenia, Kuenenia, and Brocadia) were positively related to some functional bacteria such as Nitrosomonas, SM1A02, and Calorithrix. Canonical correspondence analysis presented a strong correlation between the microbial community and influencing factors during the recovery phase. With the increase of nitrogen loading rate, the decrease of free nitrous acid and the synergistic effects, heme c content, specific anammox activity (SAA), NRR, and the abundance of dominant genus increased correspondingly. The increase of heme c content regulates the quorum sensing system, promotes the secretion of extracellular polymeric substances, and further improves SAA, NRR, and the relative abundance of the dominant genus. This study highlights some implications for the recovery of the CANON reactor after being exposed to an alkaline shock.

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Section: Resultsmentioning

confidence: 99%

Response and Adaptation of Microbial Community in a CANON Reactor Exposed to an Extreme Alkaline Shock

Yang

Mao

Wang

et al. 2020

Archaea

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“…Hal ini diakibatkan adanya hubungan antara rasio F/M (food to microorganism), Ke, dan umur lumpur sehingga setiap variabel tidak dapat bersifat variabel berdiri sendiri (independent). Kondisi ideal nilai Y pada reaktor lumpur aktif umumnya memiliki nilai antara 0,04-0,12 mgMLVSS/mgCOD dan ada pula kisaran lain antara 0,4-0,8 mgMLVSS/mgBOD ( (Lan et al, 2019).…”

Section: Parameter Biokinetikaunclassified

Model Parameter Kinetika Biologis Proses Lumpur Aktif Air Limbah Kertas Berdasarkan Variasi Waktu Detensi Pada Kondisi Tidak Tunak

Notonugroho,

Amelia,

Arif

et al. 2022

J. Ilmu Lingk.

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ABSTRAKSistem konvensional lumpur aktif untuk limbah cair industri kertas memanfaatkan mekanisme proses biologis oleh mikroorganisme tanpa penambahan bahan kimia. Kondisi proses pengolahan lumpur aktif sangat dinamis sehingga membutuhkan beberapa pendekatan pemodelan kinetika biologis (biokinetika) berdasarkan kondisi tidak tunak. Parameter umum biokinetika pada unit lumpur aktif meliputi laju pertumbuhan maksimum (µmax), konsentrasi setengah saturasi (Ks), koefisien produksi sintesis sel (Y), dan koefisien kematian mikroorganisme (Ke). Tujuan penelitian ini meliputi analisis kinerja unit lumpur aktif pada waktu detensi 6, 8, dan 12 jam, estimasi nilai koefisien biokinetika pada kondisi tidak tunak, serta mengetahui pengaruh nilai biokinetika untuk memprediksi kualitas efluen air limbah. Estimasi nilai biokinetika diperoleh berdasarkan variasi model non-inhibitor dan inhibitor nitrit berdasarkan Persamaan Monod, Contois, Sokol-Howell, Jerusalimski, dan Hinshelwood. Berdasarkan analisis statistik, nilai biokinetika dalam kondisi kondisi tidak tunak tanpa inhibitor nitrit untuk Ke (hari-1), Y (mgMLVSSS/mgCOD), µmax (hari-1), dan Ks (mg/L) pada HRT 6 jam berturut-turut sebesar 0,025; 8,59; 10,0; dan 42,03 (Sokol-Howell); HRT 8 jam berturut-turut sebesar 0,145; 0,93; 60,3; dan 43,08 (Sokol-Howell); dan HRT 12 jam berturut-turut sebesar 0,708; 3,09; 2,0; dan 64,89 (Monod). Selain itu, nilai biokinetika dalam kondisi kondisi tidak tunak dengan efek inhibitor nitrit untuk Ke (hari-1), Y (mgMLVSSS/mgCOD), µmax (hari-1), dan Ks (mg/L) pada HRT 6 jam berturut-turut sebesar 0,795; 2,26; 2,0; dan 57,57 (Jerusalimski); HRT 8 jam berturut-turut sebesar 1,96; 3,56; 3,4; dan 48,75 (Hinshelwood); dan HRT 12 jam berturut-turut sebesar 3,435; 11,62; 5,7; dan 45,02 (Hinshelwood). Nilai biokinetika ini representatif digunakan untuk aplikasi perencanaan skala lapangan, terutama untuk prediksi kualitas efluen air limbah dan desain dimensi unit pengolahan.Kata kunci: air limbah kertas, biokinetika, lumpur aktif, waktu detensi, tidak tunak.ABSTRACTActivated sludge is the conventional biological unit for treating paper-mill wastewater using microorganism activities without adding some chemicals. The dynamic condition of the activated sludge requires several approaches to estimate biological kinetic (biokinetics) modelling based on unsteady conditions. General parameters of biokinetics in activated sludge units include maximum growth rate (µmax), half-saturation concentration (Ks), yield coefficient (Y), and endogenous decay coefficient (Ke). The aim of this study was to analyze the activated sludge unit performance at hydraulic retention time (HRT) of 6, 8, and 12 hours, estimate the value of the biokinetic coefficient, and obtain the affect of biokinetic values for predicting the effluent wastewater quality. Estimation of biokinetic values was obtained based on variations in the non-inhibitor and the nitrite inhibitor models based on the Monod, Contois, Sokol-Howell, Jerusalimski, and Hinshelwood equations. Based on statistical analysis, the biokinetic values in unsteady state without nitrite inhibitors for Ke (day-1), Y (mgMLVSSS/mgCOD), µmax (day-1), dan Ks (mg/L) at HRT 6 hours were 0.025; 8.59; 10.0; and 42.03 (Sokol-Howell Eq.), respectively; at HRT 8 hours 0.145; 0.93; 60.3; and 43.08 (Sokol-Howell Eq.), respectively; at HRT 12 hours were 0.708; 3.09; 2.0; and 64.89 (Monod Eq.), respectively. In addition, the biokinetic values in unsteady conditions affecting nitrite as inhibitor for Ke (day-1), Y (mgMLVSSS/mgCOD), µmax (day-1), dan Ks (mg/L) at HRT 6 hours were 0.795; 2.26; 2.0; and 57.57 (Jerusalimski's Eq.), respectively; on HRT 8 hours of 1.96; 3.56; 3,4; and 48.75 (Hinshelwood's Eq.), respectively; on HRT 12 hours of 3,435; 11.62; 5.7; and 45.02 (Hinshelwood's Eq.), respectively. These biokinetic values representive to be used for predicting the quality of wastewater effluents and designing unit dimensions.Keywords: activated sludge, biokinetic, paper-mill wastewater, detention time, unsteady-state.

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Effects of temperature on white water treatment by the dominant bacteria

Cited by 2 publications

References 16 publications

Response and Adaptation of Microbial Community in a CANON Reactor Exposed to an Extreme Alkaline Shock

Response and Adaptation of Microbial Community in a CANON Reactor Exposed to an Extreme Alkaline Shock

Model Parameter Kinetika Biologis Proses Lumpur Aktif Air Limbah Kertas Berdasarkan Variasi Waktu Detensi Pada Kondisi Tidak Tunak

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