Management optimisation and technologies application: a right approach to balance energy saving needs and process goals

2013 ◽  
Vol 8 (2) ◽  
pp. 263-274 ◽  
Author(s):  
P. Ragazzo ◽  
L. Falletti ◽  
N. Chiucchini ◽  
G. Serra
Keyword(s):  
Energy Saving ◽  
Energy Use ◽  
Management Practices ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Waste Water Treatment Plant ◽  
The European Union ◽  
Plant Monitoring ◽  
The Impact

Energy saving is an ever increasing need not only as a result of the growth in energy global demand and as a result of progressive erosion of supply sources. Another reason is that the environmental impact deriving from energy use is becoming more and more a reason for concern (60% increase of CO2 emissions over the last 30 years). Rationalizing energy use therefore is a goal in relation to global energy policies. Recently the European Union has developed a plan to reduce energy consumption (20% by 2020): it has issued rules and guidelines targeted at efficiency improvement in different areas such as infrastructure, products, processes and services. Energy saving is therefore a must in wastewater treatment, but one needs to achieve this target without damaging the process. That said, the objective could be reached only by acting contemporarily on technologies and relative selection criteria, designing procedures and, last but not least, Waste Water Treatment Plant monitoring and management practices. This paper focuses on these different areas pointing out opportunities, benefits and possible setbacks in relation to process performance, highlighting the impact of management operations. Starting from simple management variables, it also contains an example concerning the necessary instruments and the coordination of controls needed to regularly evaluate intervention needs and available margins. This paper also deals with the consequences of technologies encouraged as solutions for stable and effective processes, but which are in clear contrast to energy saving goals.

Assessing the impact of a landfill leachate on a Canadian waste water treatment plant

1996 ◽  
Vol 68 (7) ◽  
pp. 1179-1186 ◽  
Author(s):  
Stephen D. J. Booth ◽  
Daniel Urfer ◽  
Gerard Pereira ◽  
Karl J. Caber
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Landfill Leachate ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Waste Water Treatment Plant ◽  
The Impact

scholarly journals Energy consumption reduction in a waste water treatment plant

2017 ◽  
Vol 12 (1) ◽  
pp. 104-116 ◽  
Author(s):  
S. Azimi ◽  
V. Rocher
Keyword(s):  
Energy Consumption ◽  
Energy Use ◽  
Waste Water Treatment ◽  
Cost Optimization ◽  
Operating Cost ◽  
Treatment Plant ◽  
Energy Transition ◽  
Water Treatment Plant ◽  
Waste Water Treatment Plant ◽  
Energy Consumption Optimization

Against the background of energy transition, the operators of large municipal WWTPs have come to understand the importance of issues related to energy use. Since about 2000, one such operator in the Paris conurbation, Syndicat Interdépartemental pour l'Assainissement de l'Agglomération Parisienne, has set up actions enabling energy consumption optimization, to reduce both its costs and the associated environmental impacts. Using energy (electricity, gas, fuel, and biogas) meters for sectorial recording, consumption has been mapped at various scales (macroscopic, plant, process). Electric power has emerged as the leading energy source in WWTPs and biological treatment processes (aeration) as the main consumers. On this basis, energy use optimization paths have been described, needing action at three levels. First, operating cost optimization should involve the full treatment chain, including all costs (reagents, etc.), to make the best operating choices. Two further levels, comprising process and equipment, should then be considered to determine suitable action sets.

Phosphorus and nitrogen profile measurements to locate phosphorus limitation in a fixed bed filter

2009 ◽  
Vol 60 (10) ◽  
pp. 2537-2544 ◽  
Author(s):  
S. M. Scherrenberg ◽  
H. W. H. Menkveld ◽  
M. Bechger ◽  
J. H. J. M. van der Graaf
Keyword(s):  
Waste Water Treatment ◽  
Fixed Bed ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Phosphorus Limitation ◽  
Waste Water Treatment Plant ◽  
Nitrite Accumulation ◽  
The European Union ◽  
Wwtp Effluent ◽  
Filter Bed

The European Union presented in 2000 the European Water Framework Directive (WFD). Within the WFD approach the focus is more and more on ultra low nitrogen (<2.2 mg N-total/L) and phosphorus concentrations (<0.15 mg P-total/L) in waste water treatment plant (WWTP) effluent. Nitrogen concentrations of 2.2 mg N-total/L can be reached with denitrifying filters as a tertiary treatment step. When combining nitrogen and chemical phosphorus removal in a filter, phosphorus limitation may occur. After nitrite accumulation, caused by phosphorus limitation, was measured in the filtrate water of the dual media filter, research was started to locate, to understand and to solve the problem. Profile measurements for nitrate, nitrite and orthophosphorus (PO4-P) combined with COD and O2 were conducted. Results show that the minimal required PO4-P/NOx-N ratio is 0.006 mg/mg after coagulation and flocculation. Profile measurements have proven to be a useful tool. It showed how nitrate and orthophosphorus are removed through the filter bed and it showed the consequences for the PO4-P/NOx-N ratio. When orthophosphorus is removed more rapidly compared to nitrate the PO4-P/NOx-N ratio decreases. When the PO4-P/NOx-N ratio becomes below 0.006 mg/mg for a certain period of time, orthophosphorus limitation occurs. The solution can be either changing the filter bed configuration or decreasing the coagulant dosage.

Anionic Surfactants Removal and Biodegradation in a Large Treatment Plant

1992 ◽  
Vol 26 (9-11) ◽  
pp. 2547-2550 ◽  
Author(s):  
P. Romano ◽  
M. Ranzani
Keyword(s):  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Waste Water Treatment Plant ◽  
Po River ◽  
Linear Alkylbenzene ◽  
River Waters ◽  
Mineralization Degree ◽  
The Impact ◽  
Dissolved Phase

A full scale study was conducted to investigate the destination of LAS (Linear Alkylbenzene Sulfonate) in Italy's greatest WWTP (Waste Water Treatment Plant): the Turin central plant. Specific LAS data, using established HPLC techniques, have been obtained in the influent and effluent streams, in the dissolved phase (waters) and in the adsorbed one (suspended solids and sludges) to reach a complete mass balance. LAS removal higher than 99% and LAS biodegradation ca. 85% have been observed. Attention has been also given to LAS intermediates of biodegradation, namely the sulfo fenil carboxylaters (SPC) resorting to HPLC and GC-MS techniques, the latter after derivatization. On the basis of SPC data it is possible to measure esperimentally also the biodegradation in sewers before the WWTP (at least 12%) and the mineralization degree of LAS in the WWTP (ca. 80% vs. total biodegraded LAS). The impact of the WWTP on the LAS concentration of the Po river waters has been also considered.

DESIGN PLANNING WASTEWATER TREATMENT PLANT OF NATA DE COCO INDUSTRY WITH THE ACTIVATED SLUDGE PROCESS

2016 ◽  
Vol 9 (2) ◽  
Author(s):  
Dinda Rita K. Hartaja ◽  
Imam Setiadi
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Activated Sludge ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Appropriate Technology ◽  
Waste Water Treatment Plant ◽  
Activated Sludge Process ◽  
High Level

Generally, wastewater of nata de coco industry contains suspended solids and COD were high, ranging from 90,000 mg / l. The high level of of the wastewater pollutants, resulting in nata de coco industry can not be directly disposed of its wastewater into the environment agency. Appropriate technology required in order to process the waste water so that the treated water can meet the environmental quality standards that are allowed. Designing the waste water treatment plant that is suitable and efficient for treating industrial wastewater nata de coco is the activated sludge process. Wastewater treatment using activated sludge process of conventional (standard) generally consists of initial sedimentation, aeration and final sedimentation.Keywords : Activated Sludge, Design, IPAL

First Practical Experiences with Submerged Rope-Type Bio-Film Reactors for Upgrading and Nitrification

1991 ◽  
Vol 23 (4-6) ◽  
pp. 825-834 ◽  
Author(s):  
T. H. Lessel
Keyword(s):  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Waste Water Treatment Plant ◽  
Practical Application ◽  
Reactor Material ◽  
Reactor Materials ◽  
Practical Experiences ◽  
One Year ◽  
Operational Data

The upgrading and nitrification was required for the waste water treatment plant in Geiselbullach. As space for more aeration tanks was not available, the possibility of increasing the MLSS by the use of submerged bio-film reactors was tested in a half technical scale pilot plant with three different reactor materials. Each tested reactor material caused a significant increase of MLSS and the nitrification reaction. The rope-type material was selected for the practical application, as it had not the same disadvantages of the other tested systems, which proved operational problems. After one year of continuous operation for nitrification in the full scale plant the influences on the biomass characteristics were investigated. Design criterias and details and operational data are reported.

The Design and Construction of the “Houtrust” Waste Water Treatment Plant in the Hague

1991 ◽  
Vol 24 (10) ◽  
pp. 161-170 ◽  
Author(s):  
M. D. Sinke
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
North Sea ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Waste Water Treatment Plant ◽  
The North ◽  
The North Sea ◽  
The Hague

Until a century ago, The Hague's waste water was discharged directly into the city's canals. However, the obnoxious smell and resultant pollution of local waters and beaches then necessitated the implementation of a policy of collecting and transferring waste water by means of a system of sewers. By 1937, it was being discharged, via a 400 metre-long sea outfall, directly into the North Sea. By 1967, however, the increasing volume of waste water being generated by The Hague and the surrounding conurbations called for the construction of a primary sedimentation plant. This had two sea outfalls, one 2.5 km long and the other 10 km long, the former for discharging pre-settled waste water and the latter for discharging sludge directly into the North Sea. This “separation plant” was enlarged during the period 1986-1990. On account of the little available area - only 4.1 ha - the plant had to be enlarged in two stages by constructing a biological treatment section and a sludge treatment section with a capacity of 1,700,000 p.e. (at 136 gr O2/p.e./day). In order to gain additional space, a number of special measures were introduced, including aerating gas containing 90% oxygen and stacked final clarifiers. Following completion of the sludge treatment section, it has become possible, since 1st May 1990, to dump digested sludge into a large reservoir (“The Slufter”), specially constructed to accommodate polluted mud dredged from the Rotterdam harbours and waterways. As a result of these measures, there has been a reduction of between 70% and 95% in North Sea pollution arising from the “Houtrust” waste water treatment plant. Related investment totalled Dfl. 200 million and annual operating and maintenance costs (including investment charges) will amount to Dfl. 30 million. Further measures will have to be taken in the future to reduce the discharge of phosphorus and nitrogen. So this enlargement is not the end. There will be continued extension of the purification operations of the “Houtrust” waste water treatment plant.

Design, Operating Results and Experiences of Two Large-Scale Treatment Plants with Biological Nitrogen and Phosphate Elimination

1992 ◽  
Vol 25 (4-5) ◽  
pp. 225-232
Author(s):  
C. F. Seyfried ◽  
P. Hartwig
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Large Scale ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Waste Water Treatment Plant ◽  
Main Stream ◽  
Side Stream ◽  
Biological Nitrogen

This is a report on the design and operating results of two waste water treatment plants which make use of biological nitrogen and phosphate elimination. Both plants are characterized by load situations that are unfavourable for biological P elimination. The influent of the HILDESHEIM WASTE WATER TREATMENT PLANT contains nitrates and little BOD5. Use of the ISAH process ensures the optimum exploitation of the easily degradable substrate for the redissolution of phosphates. Over 70 % phosphate elimination and effluent concentrations of 1.3 mg PO4-P/I have been achieved. Due to severe seasonal fluctuations in loading the activated sludge plant of the HUSUM WASTE WATER TREATMENT PLANT has to be operated in the stabilization range (F/M ≤ 0.05 kg/(kg·d)) in order not to infringe the required effluent values of 3.9 mg NH4-N/l (2-h-average). The production of surplus sludge is at times too small to allow biological phosphate elimination to be effected in the main stream process. The CISAH (Combined ISAH) process is a combination of the fullstream with the side stream process. It is used in order to achieve the optimum exploitation of biological phosphate elimination by the precipitation of a stripped side stream with a high phosphate content when necessary.

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