Net biomass production under complete solids retention in high organic load activated sludge process

Amanatidou, Elisavet; Samiotis, Georgios; Bellos, D; Pekridis, G.; Trikoilidou, Eleni

doi:10.1016/j.biortech.2015.01.119

Cited by 34 publications

(13 citation statements)

References 28 publications

(50 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[16,33] Furthermore, because of high DO concentrations, relative small flocs were produced with a higher compactness, which assisted in obtaining relatively low SVI values.…”

Section: Slaughterhouse Complete Solids Retention As Wwtpmentioning

confidence: 99%

“…Additionally, wastewater depended parameters such as volumetric and nutrients load can affect activated sludge (AS) characteristics such as floc cohesiveness and microbial species diversity. [16,17] Downloaded by [University of Otago] at 10: 16 12 July 2015 A c c e p t e d M a n u s c r i p t…”

Section: Influence Of Wastewater Treatment Plants' Operational Conditmentioning

confidence: 99%

“…[16,18] According to literature, BOD5:N:P and COD:N:P ratios of 100:5:1 and 150:5:1 are proposed to define the minimum nutrient requirements of AS systems designed for total carbon removal. It should be noted, however, that although specific values for these ratios may be useful as a rough index, they may not accurately indicate specific requirements of the activated sludge for a given operating conditions.…”

Section: Introductionmentioning

confidence: 99%

“…It is well known that the biological characteristics of activated sludge are linked to the operating conditions of a WWTP and microbial manipulation influences its treatment efficiency and net sludge production. [13][14][15][16] Generally, operating conditions that affect activated sludge morphological and biological characteristics in biological treatment, selected in such a way that desired bacteria are accumulated, are the mixed liquor suspended solids (MLSS) concentration, the food to microorganisms ratio (F/M), the substrate utilization rate (SUR), the solids retention time (SRT), the hydraulic retention time (HRT), the dissolved oxygen (DO) and the return activated sludge (RAS) rate. Additionally, wastewater depended parameters such as volumetric and nutrients load can affect activated sludge (AS) characteristics such as floc cohesiveness and microbial species diversity.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Influence of wastewater treatment plants' operational conditions on activated sludge microbiological and morphological characteristics

Amanatidou¹,

Samiotis²,

Trikoilidou³

et al. 2015

Environmental Technology

Self Cite

View full text Add to dashboard Cite

The effect of wastewater composition and operating conditions in activated sludge (AS) microbiological and morphological characteristics was studied in three AS wastewater treatment plants (WWTPs): (a) a high organic load slaughterhouse AS WWTP, operating at complete solids retention, monitored from its start-up and for 425 days; (b) a seasonally operational, low nitrogen load fruit canning industry AS WWTP, operating at complete solids retention, monitored from its start-up and until the end of the season (87 days); (c) a municipal AS WWTP, treating wastewater from a semi-combined sewer system, monitored during the transitions from dry to rainy and again to dry periods of operation. The sludge microbiological and morphological characteristics were correlated to nutrients' availability, solids retention time, hydraulic retention time, dissolved oxygen, mixed liquor suspended solids (MLVSS), organic load (F/M) and substrate utilization rate. The AS WWTPs' operation was distinguished in periods based on biomass growth phase, characterized by different biological and morphological characteristics and on operational conditions. An anoxic/aerobic selector minimizes the readily biodegradable compounds in influent, inhibiting filamentous growth. Plant performance controlling is presented in a logic flowchart in which operational parameters are linked to microbial manipulation, resulting in a useful tool for researchers and engineers.

show abstract

“…[16,33] Furthermore, because of high DO concentrations, relative small flocs were produced with a higher compactness, which assisted in obtaining relatively low SVI values.…”

Section: Slaughterhouse Complete Solids Retention As Wwtpmentioning

confidence: 99%

Section: Influence Of Wastewater Treatment Plants' Operational Conditmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Influence of wastewater treatment plants' operational conditions on activated sludge microbiological and morphological characteristics

Amanatidou¹,

Samiotis²,

Trikoilidou³

et al. 2015

Environmental Technology

Self Cite

View full text Add to dashboard Cite

show abstract

“…A recent approach to wastewater management minimizes sludge production through microbial predation and metabolic changes (Amanatidou et al, 2015). One of the key factors that influences bacterial ecosystem manipulation and reduces the excess production of sludge is operation of the system at high SRTs (Yoon et al, 2004;Li and Wu, 2014).…”

mentioning

confidence: 99%

Antimicrobial Resistance Genes and Wastewater Treatment

Mohammadali

Davies

2017

Antimicrobial Resistance in Wastewater Treatment Processes

View full text Add to dashboard Cite

Optimization Methodology for High COD Nutrient-Limited Wastewaters Treatment Using BAS Process

Revilla¹,

Galán

Viguri

2018

Water Air Soil Pollut

View full text Add to dashboard Cite

Optimization of biofilm activated sludge (BAS) process via mathematical modelling is an entangle activity since economic, environmental objective and technical decision must be considered. This paper presents a methodology to optimize the operational conditions of BAS process in four steps by combining dynamic simulation techniques with nonlinear optimization methods and with operative decision making criteria. Two set of variables are separately prioritized in the methodology: essential variables related to physical operation to enforce established process performance, and refinement variables related to biological processes that can generate risks of bulking, pinpoint floc and rising sludge. The proposed optimization strategy is applied for the treatment of high COD wastewater under nutrient limitation using an integrated mathematical model for COD removal that include predation, hydrolysis and a simplified approach to the limiting solids flux theory in the secondary clarifier in order to facilitate the convergence of the optimization solver. The methodology is implemented in a full scale wastewater treatment plant for a cellulose and viscose fibre mill obtaining: i) improvement of the effluent quality index (Kg pollution/m 3) up to 62% and, ii) decrease the operating cost index (€/m 3) of the process up to 30% respect the regular working operational conditions of the plant. The proposed procedure can be also applied to other biological treatments treating high COD nutrient-limited industrial wastewater such as from textile and winery production among others. Modelling of biofilm stages and activated sludge provided a better understanding of the intrinsic connections between soluble and particulate compounds, biomass properties and process performance in terms of COD, BOD and TSS (Fan et al. 2017). Commercial simulation platforms, including GPS-X and BioWin can be used to describe the one dimensional (1-D) multi-species biofilm structure and biological behaviour of the treatment process (Li et al. 2016); however, none of these platforms include the description of the predator microorganism which plays a predominant role in a BAS process under certain conditions such as nutrient limited conditions (Revilla et al. 2016a). The authors published recently the mathematical model of BAS process including hydrolysis and predation and uses wastewaters coming from viscose and cellulose production industrial process to validate the model. In Revilla et al. 2016a the whole BAS process was simulated and the evaluation of the role and contribution of predator microorganisms towards COD removal, nutrient requirements and sludge production is displayed. More strict regulations are being imposed regularly in terms of COD, BOD and TSS removal that enforce wastewater treatment technologies to progress (Guerrero et al. 2011; Kamali and Khodaparast 2015). Optimization of an existing facility in terms of cost, operational improvements and removal efficiency is the most effective method of achieving the stricter compliance and the mo...

show abstract

Net biomass production under complete solids retention in high organic load activated sludge process

Cited by 34 publications

References 28 publications

Influence of wastewater treatment plants' operational conditions on activated sludge microbiological and morphological characteristics

Influence of wastewater treatment plants' operational conditions on activated sludge microbiological and morphological characteristics

Antimicrobial Resistance Genes and Wastewater Treatment

Optimization Methodology for High COD Nutrient-Limited Wastewaters Treatment Using BAS Process

Contact Info

Product

Resources

About