Organic matter parameters in WWTP – a critical review and recommendations for application in activated sludge modelling

Ahnert, Markus; Schalk, Thomas; Brückner, Horst; Effenberger, Johannes; Kuehn, Volker; Krebs, Peter

doi:10.2166/wst.2021.419

Cited by 20 publications

(9 citation statements)

References 47 publications

(47 reference statements)

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“…A strong linear relationship between COD and TSSs was found with an R 2 of 0.81, as shown in Figure 3 . This finding was similar to other researchers’ work [ 35 , 36 ]. One study has found multiple regression among TSSs and COD, pH and total dissolved solids for the removal of solids from chemically enhanced primary treatment systems of wastewater [ 37 ].…”

Section: Resultssupporting

confidence: 94%

Using Surrogate Parameters to Enhance Monitoring of Community Wastewater Management System Performance for Sustainable Operations

Shi,

Chow,

Gao

et al. 2024

Sensors

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Community wastewater management systems (CWMS) are small-scale wastewater treatment systems typically in regional and rural areas with less sophisticated treatment processes and often managed by local governments or communities. Research and industrial applications have demonstrated that online UV-Vis sensors have great potential for improving wastewater monitoring and treatment processes. Existing studies on the development of surrogate parameters with models from spectral data for wastewater were largely limited to lab-based. In contrast, industrial applications of these sensors have primarily targeted large wastewater treatment plants (WWTPs), leaving a gap in research for small-scale WWTPs. This paper demonstrates the suitability of using a field-based online UV-Vis sensor combined with advanced data analytics for CWMSs as an early warning for process upset to support sustainable operations. An industry case study is provided to demonstrate the development of surrogate monitoring parameters for total suspended solids (TSSs) and chemical oxygen demand (COD) using the UV-Vis spectral data from an online UV-Vis sensor. Absorbances at a wavelength of 625 nm (UV625) and absorbances at a wavelength of 265 nm (UV265) were identified as surrogate parameters to measure TSSs and COD, respectively. This study contributes to the improvement of WWTP performance with a continuous monitoring system by developing a process monitoring framework and optimization strategy.

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Section: Resultssupporting

confidence: 94%

Using Surrogate Parameters to Enhance Monitoring of Community Wastewater Management System Performance for Sustainable Operations

Shi,

Chow,

Gao

et al. 2024

Sensors

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“…[ 27,28 ] In most studies, the ratios vary from 0.9 to 2 and are typically based either on an empirical formula or on observed values for raw sewage (i.e., 1.6 for biodegradable matter). [ 27,28 ] Ahnert et al. reported that according to experimental and theoretical considerations, the TCOD/VS ratios range from 2 to 2.9 for lipids, 1.4 to 1.5 for proteins, and 1.07 to 1.18 for carbohydrates.…”

Section: Resultsmentioning

confidence: 99%

“…The overall ratio of TCOD/VS indicates the contribution of various components, that is, biodegradable matter, inorganic matter, biomass, and endogenous decay products, to PM. [27,28] In most studies, the ratios vary from 0.9 to 2 and are typically based either on an empirical formula or on observed values for raw sewage (i.e., 1.6 for biodegradable matter). [27,28] Ahnert et al reported that according to experimental and theoretical considerations, the TCOD/VS ratios range from 2 to 2.9…”

Section: Pig Manure Characterizationmentioning

confidence: 99%

Comparative assessment of methane emissions from the manure of Mexican Creole Hairless Pigs and Commercial Pigs fed the same diet

Angel‐Hernandez,

Torres‐Zúñiga,

García‐Munguía

et al. 2024

CLEAN Soil Air Water

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Pig production contributes significantly to the high environmental footprint of the livestock sector. Therefore, in this framework, a transition toward more sustainable production is essential. Local natural livestock resources, such as Mexican Creole Hairless Pigs, provide a good opportunity to achieve sustainable pig production. In the present study, a first approximation to compare the carbon emissions of Mexican Creole Hairless Pig manure from Commercial Pig manure is presented. Under the same feeding and housing conditions, the specific methane emissions of both Mexican Creole Hairless Pigs and Commercial Pigs manure were determined experimentally at room temperature. In addition, specific methane production kinetics was modeled using the Gompertz equation to estimate the specific methane production rate. The methane emission factors for Mexican Creole Hairless Pig manure (0.33 ± 0.02 kg[CO2‐eq]/LU per day) were half those of Commercial Pig manure (0.7 ± 0.04 kg[CO2‐eq]/LU per day), and biochemical manure analysis suggested that Mexican Creole Hairless Pigs had better digestibility of the diet. In general, due to physiological factors such as food intake rate and gut microbiota development, which could influence the fat and fiber digestibility of Creole genotypes, pig genotype should be included as an additional factor to estimate greenhouse gas emissions from pig manure. The production of Mexican Creole Hairless Pigs in an extensive local system is therefore an attractive option for developing new sustainable markets.

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“…BMPs were set up in 200 mL glass serum bottles with crimp caps and septum seals. In Phase I, the substrate to inoculum ratio (S/I) was set at 2.5 g COD/g VSS based on prior studies [19,27,28]. The yeast-only system in Phase 1 soured due to volatile fatty acid (VFA) accumulation.…”

Section: Methodsmentioning

confidence: 99%

Recovery of Energy and Carbon Dioxide from Craft Brewery Wastes for Onsite Use

Rawalgaonkar,

Zhang,

Walker

et al. 2023

Fermentation

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Interest in craft beers is increasing worldwide due to their flavor and variety. However, craft breweries have high water, energy, and carbon dioxide (CO2) demands and generate large quantities of high-strength waste and greenhouse gases. While many large breweries recover energy using anaerobic digestion (AD) and recapture CO2 from beer fermentation, little is known about the economic feasibility of applying these technologies at the scale of small craft breweries. In addition, compounds in hops (Humulus lupulus), which are commonly added to craft beer to provide a bitter or “hoppy” flavor, have been shown to adversely affect anaerobic microbes in ruminant studies. In this study, biochemical methane potential (BMP) assays and anaerobic sequencing batch reactor (ASBR) studies were used to investigate biomethane production from high-strength craft brewery waste, with and without hop addition. A spreadsheet tool was developed to evaluate the economic feasibility of bioenergy and CO2 recovery depending on the brewery’s location, production volume, waste management, CO2 requirement, energy costs, and hop waste addition. The results showed that co-digestion of yeast waste with 20% hops (based on chemical oxygen demand (COD)) resulted in slightly lower methane yields compared with mono-digestion of yeast; however, it did not significantly impact the economic feasibility of AD in craft breweries. The use of AD and CO2 recovery was found to be economically feasible if the brewery’s annual beer production is >50,000 barrels/year.

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Organic matter parameters in WWTP – a critical review and recommendations for application in activated sludge modelling

Cited by 20 publications

References 47 publications

Using Surrogate Parameters to Enhance Monitoring of Community Wastewater Management System Performance for Sustainable Operations

Using Surrogate Parameters to Enhance Monitoring of Community Wastewater Management System Performance for Sustainable Operations

Comparative assessment of methane emissions from the manure of Mexican Creole Hairless Pigs and Commercial Pigs fed the same diet

Recovery of Energy and Carbon Dioxide from Craft Brewery Wastes for Onsite Use

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