Monitoring the performance of wastewater treatment plants for organic matter removal using excitation-emission matrix fluorescence

In recent years new technologies have been developed to improve the biological degradation of sewage sludge by anaerobic digestion. The paper describes the results of a demonstration of ultrasonic disintegration on the Dutch Wastewater Treatment Plant (WWTP) Land van Cuijk. The effect on the degradation of organic matter is presented, together with the effect on the dewatering characteristics. Recommendations are presented for establishing research conditions in which the effect of sludge disintegration can be determined in a more direct way that is less sensitive to changing conditions in the operation of the WWTP. These recommendations have been implemented in the ongoing research in the Netherlands supported by the National Institute for wastewater research (STOWA).

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Comparative Kinetic Study of Carrier Type in a Moving Bed System Applied to Organic Matter Removal in Urban Wastewater Treatment

Water Air & Soil Pollution ◽

10.1007/s11270-011-0976-5 ◽

2011 ◽

Vol 223 (4) ◽

pp. 1699-1712 ◽

Cited By ~ 37

Author(s):

J. Martín-Pascual ◽

C. López-López ◽

A. Cerdá ◽

J. González-López ◽

E. Hontoria ◽

...

Keyword(s):

Organic Matter ◽

Wastewater Treatment ◽

Kinetic Study ◽

Urban Wastewater ◽

Organic Matter Removal ◽

Moving Bed ◽

Urban Wastewater Treatment

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Analysis and Modeling of the Continuous Electro-oxidation Process for Organic Matter Removal in Urban Wastewater Treatment

Industrial & Engineering Chemistry Research ◽

10.1021/ie303021v ◽

2013 ◽

Vol 52 (22) ◽

pp. 7534-7540 ◽

Cited By ~ 15

Author(s):

Antonio Dominguez-Ramos ◽

Angel Irabien

Keyword(s):

Organic Matter ◽

Wastewater Treatment ◽

Oxidation Process ◽

Urban Wastewater ◽

Organic Matter Removal ◽

Electro Oxidation ◽

Urban Wastewater Treatment

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The Use of Organic Coagulants in the Primary Precipitation Process at Wastewater Treatment Plants

Water ◽

10.3390/w12061650 ◽

2020 ◽

Vol 12 (6) ◽

pp. 1650 ◽

Cited By ~ 3

Author(s):

Krzysztof Czerwionka ◽

Anna Wilinska ◽

Agnieszka Tuszynska

Keyword(s):

Organic Matter ◽

Wastewater Treatment ◽

Removal Efficiency ◽

Wastewater Treatment Plants ◽

Renewable Energy Sources ◽

Pollutant Removal ◽

Treated Wastewater ◽

Biological Nutrient Removal ◽

Precipitation Process ◽

Primary Precipitation

Measurements for determining the effect of chemically enhanced primary treatment (CEPT) on the efficiency of pollutant removal from wastewater were carried out using conventional inorganic coagulants PIX113 with polymer A110 (Kemipol, Police, Poland) and unconventional cationic organic coagulants Cofloc (Attana, Coalville, UK) C29510 (Kemipol, Police, Poland) and Sedifloc 575 (3F Chimica, Sandrigo, Italy). The average removal efficiency in the 2-h sedimentation process was 46%, 34%, 8%, 12% for the total suspended solids, organic matter (COD), total nitrogen, and total phosphorus, respectively. The use of organic coagulants contributed to 14–81% increase of pollutant removal efficiency. Substantial discrepancies in biological nutrient removal processes were not discovered in two-phase (anaerobic-anoxic) experiments without and with the addition of the organic coagulants. The increase in organic matter removal efficiency as a result of the CEPT process may contribute to a 65–80% increase in biogas production. The conducted research confirms the possibility of using organic coagulants in the primary precipitation process in wastewater treatment plants (WWTPs) in accordance with the principles of maximum energy recovery, thereby promoting renewable energy sources. Additionally, organic coagulants, as opposed to inorganic ones, do not cause a significant increase of chloride and sulfate ion concentrations, which facilitates the use of treated wastewater in the water reuse systems, such as irrigation of agricultural crops.

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Optimization and scale-up of an LED-illuminated microalgal photobioreactor for wastewater treatment

Water Science & Technology ◽

10.2166/wst.2020.058 ◽

2019 ◽

Vol 80 (12) ◽

pp. 2352-2361

Author(s):

L. M. L. Silva ◽

A. F. Santiago ◽

G. A. Silva ◽

A. L. P. Castro ◽

L. S. Bastos ◽

...

Keyword(s):

Organic Matter ◽

Wastewater Treatment ◽

Wastewater Treatment Plants ◽

Light Emitting Diode ◽

Scale Up ◽

Operating Time ◽

Luminous Flux ◽

Light Emitting ◽

Operational Conditions ◽

Nitrogen Phosphorus

Abstract The use of light-emitting diode (LED)-illuminated photobioreactors with microalgae has been extensively studied for wastewater treatment. Most studies have used isolated microalgae species; however, this practice does not match the reality of conditions in wastewater treatment plants. Operational conditions that promote greater growth of algal biomass and that remove pollutants most effectively are disputed in the literature. In this context, LED-illuminated photobioreactors with microalgae were evaluated using multivariate analysis in order to optimize removal of pollutants (nitrogen, phosphorus, and carbonaceous organic matter). Three variables were evaluated: operating time, LED wavelength, and luminous flux intensity. A microalgae consortium was used in the photobioreactor. In addition to the LED-illuminated photobioreactors, control photobioreactors illuminated by sunlight were also operated. Using the results obtained in the optimization, a scaled-up reactor approximately 8.5 times larger in volume was operated to evaluate if the behavior would be maintained. The best operational conditions for the removal of pollutants were observed in LED-illuminated photobioreactors operated under a light intensity of 700 μmol·m−2s−1 for 15 days. Under these conditions, it was possible to remove 89.97% of carbonaceous organic matter, 86.50% of nitrogen, and 30.64% of phosphorus. The scaled-up photobioreactor operated with similar performance.

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