scholarly journals Modeling of Electric Energy Consumption during Dairy Wastewater Treatment Plant Operation

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3769 ◽  
Author(s):  
Radosław Żyłka ◽  
Wojciech Dąbrowski ◽  
Paweł Malinowski ◽  
Beata Karolinczak
Keyword(s):  
Wastewater Treatment ◽  
Energy Consumption ◽  
Air Temperature ◽  
Biological Treatment ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Electric Energy ◽  
Dairy Wastewater ◽  
Organic Load ◽  
Electric Energy Consumption

The intensification of biological wastewater treatment requires the high usage of electric energy, mainly for aeration processes. Publications on energy consumption have been mostly related to municipal wastewater treatment plants (WWTPs). The aim of the research was to elaborate on models for the estimation of energy consumption during dairy WWTP operation. These models can be used for the optimization of electric energy consumption. The research was conducted in a dairy WWTP, operating with dissolved air flotation (DAF) and an activated sludge system. Energy consumption was measured with the help of three-phase network parameter transducers and a supervisory control and data acquisition (SCADA) system. The obtained models provided accurate predictions of DAF, biological treatment, and the overall WWTP energy consumption using chemical oxygen demand (COD), sewage flow, and air temperature. Using the energy consumption of the biological treatment as an independent variable, as well as air temperature, it is possible to estimate the variability of the total electric energy consumption. During the summer period, an increase in the organic load (expressed as COD) discharged into the biological treatment causes higher electric energy consumption in the whole dairy WWTP. Hence, it is recommended to increase the efficiency of the removal of organic pollutants in the DAF process. An application for the estimation of energy consumption was created.

On-line microwave total solids sensoring in sewage characterization

2009 ◽  
Vol 59 (7) ◽  
pp. 1291-1297
Author(s):  
H. Poutiainen ◽  
S. Laitinen ◽  
P. Juntunen ◽  
H. Heinonen-Tanski
Keyword(s):  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Organic Load ◽  
Measured Signal ◽  
Municipal Wastewater Treatment ◽  
Wastewater Treatment Process ◽  
Total Solids ◽  
Wastewater Stream ◽  
On Line

We describe a novel application for a microwave on-line sensor to measure the total solids (TS) load entering a municipal wastewater treatment plant (WWTP) from slaughterhouse sewage and some sanitary wastewaters. Measuring this kind of wastewater stream is very challenging, because it contains a high, but varying organic load with nitrogen, phosphorus and microorganisms. The reliability of the measured signal was studied by comparison with laboratory analyses and a correlation is presented of TS-value with other parameters that are typically followed in a wastewater treatment process. The results suggest that on-line microwave sensoring could be used to monitor total solids in wastewater influent. Our results show that the on-line microwave sensor and laboratory reference analyses give similar results with a good correlation between the two techniques. Furthermore, we demonstrate that the total solids values correlate well with conductivity, total nitrogen and BOD7 values but not with phosphorus, pH and temperature.

Potentials and limits of anaerobic digestion of sewage sludge: Energy self-sufficient municipal wastewater treatment plant?

2012 ◽  
Vol 66 (6) ◽  
pp. 1277-1281 ◽  
Author(s):  
P. Jenicek ◽  
J. Bartacek ◽  
J. Kutil ◽  
J. Zabranska ◽  
M. Dohanyos
Keyword(s):  
Wastewater Treatment ◽  
Energy Consumption ◽  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Wastewater Treatment Plant ◽  
Municipal Wastewater ◽  
Biogas Production ◽  
Treatment Plant ◽  
Self Sufficiency ◽  
Digestion Efficiency

Anaerobic digestion is the only energy-positive technology widely used in wastewater treatment. Full-scale data prove that the anaerobic digestion of sewage sludge can produce biogas that covers a substantial amount of the energy consumption of a wastewater treatment plant (WWTP). In this paper, we discuss possibilities for improving the digestion efficiency and biogas production from sewage sludge. Typical specific energy consumptions of municipal WWTPs per population equivalent are compared with the potential specific production of biogas to find the required/optimal digestion efficiency. Examples of technological measures to achieve such efficiency are presented. Our findings show that even a municipal WWTP with secondary biological treatment located in a moderate climate can come close to energy self-sufficiency. However, they also show that such self-sufficiency is dependent on: (i) the strict optimization of the total energy consumption of the plant, and (ii) an increase in the specific biogas production from sewage sludge to values around 600 L per kg of supplied volatile solids.

scholarly journals Sewage sludge utilization for the municipality of Gdansk

2019 ◽  
pp. 169-177
Author(s):  
Ewa Sienkiewics ◽  
Piotr Kowalik ◽  
Stanislav Drzewinski ◽  
Klemens Herman
Keyword(s):  
Wastewater Treatment ◽  
Biological Treatment ◽  
Municipal Wastewater ◽  
Land Reclamation ◽  
Treatment Plant ◽  
Municipal Wastewater Treatment ◽  
Waste Dump ◽  
Treatment Technology ◽  
Phosphorus Extraction ◽  
Near Future

In the municipal wastewater treatment plant in Gdansk a biological treatment technology allowing removing of nutrients was launched recently. This will result in increasing of the volume of sludge from 27.3 t d.m./d now to about 45 t d.m./d in the near future. The analysis of various possibilities of sludge utilization was made. It was concluded that incineration of the sludge seems to be the most promising method, while the possibilities of application of sludge in agriculture, forestry or to land reclamation are limited. Therefore it is suggested that 90% of sludge should be incinerated and the remaining 10% - stabilized with lime and applicated to land reclamation. The ahses generated during the incineration of sludge should be deposited at the municipal waste dump, with possible phosphorus extraction in the future.

scholarly journals Impact of Operational Parameters on Bacterial Community in a Full-Scale Municipal Wastewater Treatment Plant

2012 ◽  
Vol 61 (1) ◽  
pp. 41-49 ◽  
Author(s):  
AGNIESZKA CYDZIK-KWIATKOWSKA ◽  
MAGDALENA ZIELIŃSKA ◽  
IRENA WOJNOWSKA-BARYŁA
Keyword(s):  
Wastewater Treatment ◽  
Bacterial Community ◽  
Activated Sludge ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Organic Load ◽  
Municipal Wastewater Treatment ◽  
Load Rate ◽  
Organic Load Rate ◽  
Ammonia Oxidising Bacteria

A bacterial community in activated sludge from a full-scale municipal wastewater treatment plant was monitored throughout the year with the use of FISH, RISA and DGGE techniques. In the investigated range of temperatures (11.9-21.6 degrees C), a rise in temperature resulted in a lower total bacteria richness, while organic load rate changes from 0.09 to 0.21 g COD x g TSS(-1) x d(-1) were positively correlated with the number of bands in RISA patterns. The most diverse pattern (29 different bands) was characteristic for the activated sludge sample collected at the end of January at wastewater temperature of 11.9 degrees C. The ammonia-oxidising bacteria community did not change during the study, and comprised of 4 different bacterial populations with one dominant species closely related to Nitrosospira sp. REGAU (GenBank accession number AY635572.1). The percentage of ammonia-oxidising bacteria in the activated sludge varied from 6.2 to 19.5% and depended on temperature (R = 0.61, p = 0:02) and organic load rate (R = -0.55, p = 0.04).

scholarly journals Application of ultrasonic disintegration to waste activated sludge for increasing of biogas production by anaerobic digestion

2020 ◽  
Vol 2 (2) ◽  
pp. 17-21
Author(s):  
Ion Viorel Patroescu ◽  
Razvan Laurentiu Dinu ◽  
Mihai Stefanescu ◽  
Valeriu Robert Badescu ◽  
Nicolae Ionut Cristea ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Municipal Wastewater ◽  
Biogas Production ◽  
Treatment Plant ◽  
Experimental Tests ◽  
Organic Load ◽  
Municipal Wastewater Treatment ◽  
Biological Sludge ◽  
Sludge Stabilization

The municipal wastewater treatment is the source of significant amounts of primary and secondary sludge which is under the present legislation referring to quality and management aspects. It is estimated that a half of wastewater treatment plant costs are due to the sludge management. Anaerobically sludge stabilization, capitalization as energy source, in order to diminish the costs and sludge volume decreasing, are the aims of the main operational steps of sludge treatment, as a part of wastewater treatment plant. The improvement of sludge anaerobically stabilization process must be possible by acting in the rate limiting step - hydrolysis in order to rise the organic carbon solubilization. The increase of soluble carbon can be possible by adding a pretreatment step of waste biological sludge, ultrasonic disintegration being one option. This paper emphasized the experimental results regarding anaerobically stabilization of the thickened waste biological sludge by ultrasonication taking into account the results of blank test, without ultrasonication. Experimental tests show that ultrasonic disintegration of the sludge having initial dried substances content (d.w) 2.72% and soluble organic load COD of 598 mg O2/L led to soluble COD concentration of 4950-6710 mg O2/L after sonication with specific energy in the range of 3.06 - 14.24 kWh/kg d.w. Anaerobically stabilization during 25 test days at 36 0C of the mixture 40% disintegrated biological sludge and 60% digested sludge (inoculum) mixture led to 30-38.6% increase of biogas production comparing with parallel test with non-sonicated sludge.

scholarly journals Evaluation of operation and management of Luocheng small municipal wastewater treatment plant

2020 ◽  
Vol 194 ◽  
pp. 04009
Author(s):  
Qiaoquan Wei ◽  
Guanwen Cheng ◽  
Bangzhou Sun ◽  
Liao Zhang ◽  
Yuling Zhang ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Energy Consumption ◽  
Wastewater Treatment Plant ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Municipal Wastewater Treatment ◽  
Municipal Wastewater Treatment Plant ◽  
Treated Effluent ◽  
Operation Rate ◽  
Operation And Management

Operation efficiency, effect and operation energy consumption are the main basis for the evaluation of the operation and management level of wastewater treatment plant. The statistics of the operation data of the small municipal wastewater treatment plant in Luocheng County show that the operation rate of the facility is high, and the treated effluent reaches the Level A standard of the “Discharge standard of pollutants for municipal wastewater treatment plant” (GB18918-2002), and the various evaluation indicators of the urban wastewater treatment plant basically normal. However, the average operating load of some municipal wastewater treatment plant has not reached the index requirement for the operation period of production, and the load rates of CODCr and NH4+-N are mostly below 60%, and wastewater treatment plant unit wastewater volume, unit CODCr and NH4+-N load energy consumption is high. The reason is that the water quality of the design of the micro-municipal wastewater treatment plant is not reasonable, the construction scale is too large, and the operation fails to adopt effective management and control technology measures.

Dairy Wastewater Treatment Engineering Examples

2013 ◽  
Vol 295-298 ◽  
pp. 1333-1336
Author(s):  
You Qing Gao ◽  
Hong Cui
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Municipal Wastewater ◽  
Treatment Process ◽  
Treatment Plant ◽  
Dairy Wastewater ◽  
Aerobic Treatment ◽  
Municipal Wastewater Treatment ◽  
Two Phase ◽  
Treated Water

The wastewater treatment works of one of Yili dairy plants are analyzed in detail in this paper. Two-phase anaerobic and composite aerobic treatment process for wastewater is used in this project. The treated water can reach the first level B discharge standard of “Discharge standard of pollutants for municipal wastewater treatment plant” (GB18918-2002).

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