Wastewater Sludge Dewatering for Champion-Hamilton Treatment Facility

1999 ◽  
Vol 40 (11-12) ◽  
pp. 155-162
Author(s):  
Roscoe F. Ward ◽  
Billy Huston
Keyword(s):  
Wastewater Treatment ◽  
Treatment Plant ◽  
Wastewater Sludge ◽  
Sludge Dewatering ◽  
Paper Mills ◽  
Sludge Disposal ◽  
Sludge Cake ◽  
Motor Load ◽  
Chemical Sludge ◽  
Made In

Paper mills are under constant pressure to increase their profits and to reduce their wastewater treatment costs. Champion International Mill in Hamilton, Ohio, is not an exception. The mill produces 340 to 365 tons/day of coated and uncoated printing and writing papers. Prior to 1996, Champion used less than 60 tons/day of secondary fiber. The usage of secondary fiber has increased to 100 to 114 tons/day. In 1996 improvements were made in the mill to reduce fiber losses. At that time the corporation also changed suppliers of polymers. As a result of these changes, the wastewater treatment plant saw its sludge disposal costs increasing. The solids from their screw presses decreased from 55% to 48%. This paper reports the series of options that were examined to improve the dewatering and to lower disposal costs. Included are changes in polymers and polymer applications, changes in the chemical sludge mixing, improved press orifice cleaning, and screw press motor load control systems. The effects of these changes have resulted in improved dewatering and the potential for even higher solids in the sludge cake. The economics of the sludge dewatering system are reviewed.

Sludge Handling and Disposal at Small Wastewater Treatment Plants in Norway

1990 ◽  
Vol 22 (3-4) ◽  
pp. 233-233 ◽  
Author(s):  
Bjarne Paulsrud
Keyword(s):  
Wastewater Treatment ◽  
Agricultural Land ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Wastewater Sludge ◽  
Polymer Addition ◽  
Sludge Stabilization ◽  
Sludge Disposal ◽  
Sanitary Landfills ◽  
Gravity Thickening

Most sludges from small wastewater treatment plants in Norway are either dumped in sanitary landfills or utilized on agricultural land. Norwegian guidelines for wastewater sludge disposal recommend all sludges to be dewatered prior to disposal. For agricultural use the sludge should be stabilized at the treatment plant or stored in piles for at least six months before utilization. Almost every plant has possibilities for sludge gravity thickening, and polymer addition is becoming quite popular for that process. Dewatering of sludge will often take place at a larger treatment plant, or In areas with no such plants, dewatering lagoons and mobile dewatering trucks are employed. For sludge stabilization, aerobic digestion is the predominant method.

Comparison of lime and alum as oily sludge conditioners

1997 ◽  
Vol 36 (12) ◽  
pp. 117-124 ◽  
Author(s):  
Tay Joo Hwa ◽  
S. Jeyaseelan
Keyword(s):  
Specific Resistance ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Oily Sludge ◽  
Sludge Dewatering ◽  
Capillary Suction ◽  
Sludge Cake ◽  
Solids Content ◽  
Optimum Chemical

Chemical conditioning improves sludge dewatering. Choice of chemical conditioners is very much dependent on the characteristics of the sludges and the type of dewatering devices. Lime, alum, ferric chloride and polyelectrolytes are commonly used chemical conditioners. Anaerobic digested sludge samples collected from a sewage treatment plant with different oil contents varying from 1.8% to 8.0% by weight have been examined in the laboratory to find out their specific resistance, capillary suction time and filter yield. Lime and alum were used separately as conditioners. Different dosages of conditioner varying from 2% to 12% by weight were used to determine the optimum chemical dosage for varying oil contents. Lime dosages of about 6% were found to yield favourable characteristics. Addition of alum decreases the specific resistances and capillary suction times of oily sludges rapidly up to 4% dosages. Alum dosages beyond 4% only increase the solids content in the sludge cake and increase the sludge volume to be handled. A correlation between CST and specific resistance to filtration was established. CST can be measured easily and quickly in the laboratories. Using the CST and the correlation a quick prediction on dewaterability can be established.

The effect of sludge from the wastewater treatment plant of TIARET (ALGERIA) on the growth of turnip "Brassica rapa"; Morphological responses and potential efficacy of phytoremediation

2020 ◽  
Author(s):  
Leila Soudani ◽  
Benchohra Maamar ◽  
Meriem Chafaa ◽  
Belgacem Nouar ◽  
Oliver Wiche
Keyword(s):  
Trace Elements ◽  
Wastewater Treatment ◽  
Brassica Rapa ◽  
Treatment Plant ◽  
Mineral Elements ◽  
Negative Consequences ◽  
Sludge Disposal ◽  
Metallic Trace Elements ◽  
Potential Efficacy ◽  
The One

<p>Wastewater treatment always produces a large amount of sludge. The different uses of sludge disposal have negative consequences for the environment. Agricultural use may appear in some situations as an alternative to current solutions, both to optimize the degradation and recycling of organic and mineral elements. During this work, on the one hand, we investigated  the effect of sludge on the growth of turnip (Brassica rapa), a plant that tolerates metallic trace elements, especially lead (Liu et al., 2000) and which is considered a model plant in eco-toxicology (Sun et al., 2010), and on the other hand to determine if it has the potential to be included in phytoremediation systems.</p><p>The seeds were put in different substrates that contained three sludge doses: 20%, 40% and 60%, mixed with agricultural soil  which contained high levels  of metallic trace elements  exceeding the standard eligible concentration  by AFNOR. compared to  the soil, concentrations of potentiall toxic trace elements in sludge were lower than in soil. Morphological measurements were carried out during two months of planting, showing the positive effect of the sludge on the growth of the plant. The recorded biometric values (height, number of leaves, weight, rotation and height of the bulb) for all doses, far exceed those of control plants (100% soil), with high values recorded in the mixture of soil with  60% sludge.</p><p>The concentration of metallic trace elements in the different substrates and also in the leaves and the turnip bulb after two months of planting shows that the plant  accumulates and tolerates hight concentrations of elements  and can therefore be used as a phytoremediator for polluted soils. The highest levels of metal accumulation were observed on the substrate in the  soil mixture  with  60% sludge.</p><p> </p>

scholarly journals Occurrence of bisphenol A in wastewater and wastewater sludge of CUQ treatment plant

2011 ◽  
Vol 1 (1) ◽  
pp. 3 ◽  
Author(s):  
Dipti Prakash Mohapatra ◽  
Satinder Kaur Brar ◽  
Rajeshwar Dayal Tyagi ◽  
Rao Y. Surampalli
Keyword(s):  
Wastewater Treatment ◽  
Bisphenol A ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Wastewater Sludge ◽  
Process Stream ◽  
High Concentration ◽  
Endocrine Activity ◽  
Treated Effluent ◽  
Major Interest

The identification and quantification of bisphenol A (BPA) in wastewater (WW) and wastewater sludge (WWS) is of major interest to assess the endocrine activity of treated effluent discharged into the environment. BPA is manufactured in high quantities fro its use in adhesives, powder paints, thermal paper and paper coatings among others. Due to the daily use of these products, high concentration of BPA was observed in WW and WWS. BPA was measured in samples from Urban Community of Quebec wastewater treatment plant located in Quebec (Canada) using LC-MS/MS method. The results showed that BPA was present in significant quantities (0.07 μg L–1 to 1.68 μg L–1 in wastewater and 0.104 μg g–1 to 0.312 μg g–1 in wastewater sludge) in the wastewater treatment plant (WWTP). The treatment plant is efficient (76 %) in removal of pollutant from process stream, however, environmentally significant concentrations of 0.41 μg L–1 were still present in the treated effluent. Rheological study established the partitioning of BPA within the treatment plant. This serves as the base to judge the portion of the process stream requiring more treatment for degradation of BPA and also in selection of different treatment methods. Higher BPA concentration was observed in primary and secondary sludge solids (0.36 and 0.24 μg g–1, respectively) as compared to their liquid counterpart (0.27 and 0.15 μg L–1, respectively) separated by centrifugation. Thus, BPA was present in significant concentrations in the WWTP and mostly partitioned in the solid fraction of sludge (Partition coefficient (Kd) for primary, secondary and mixed sludge was 0.013, 0.015 and 0.012, respectively).

Zoogleal Clusters and Sludge Dewatering Potential in an Industrial Activated-Sludge Wastewater Treatment Plant

2000 ◽  
Vol 72 (1) ◽  
pp. 56-64 ◽  
Author(s):  
Curtis A. Lajoie ◽  
Alice C. Layton ◽  
Ingrid R. Gregory ◽  
Gary S. Sayler ◽  
Don E. Taylor ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Sludge Dewatering

scholarly journals Activated Sludge Microbial Community and Treatment Performance of Wastewater Treatment Plants in Industrial and Municipal Zones

2020 ◽  
Vol 17 (2) ◽  
pp. 436 ◽  
Author(s):  
Yongkui Yang ◽  
Longfei Wang ◽  
Feng Xiang ◽  
Lin Zhao ◽  
Zhi Qiao
Keyword(s):  
Wastewater Treatment ◽  
Microbial Community ◽  
Activated Sludge ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Wastewater Sludge ◽  
Community Diversity ◽  
Nitrogen And Phosphorus ◽  
Metabolic Functions

Controlling wastewater pollution from centralized industrial zones is important for reducing overall water pollution. Microbial community structure and diversity can adversely affect wastewater treatment plant (WWTP) performance and stability. Therefore, we studied microbial structure, diversity, and metabolic functions in WWTPs that treat industrial or municipal wastewater. Sludge microbial community diversity and richness were the lowest for the industrial WWTPs, indicating that industrial influents inhibited bacterial growth. The sludge of industrial WWTP had low Nitrospira populations, indicating that influent composition affected nitrification and denitrification. The sludge of industrial WWTPs had high metabolic functions associated with xenobiotic and amino acid metabolism. Furthermore, bacterial richness was positively correlated with conventional pollutants (e.g., carbon, nitrogen, and phosphorus), but negatively correlated with total dissolved solids. This study was expected to provide a more comprehensive understanding of activated sludge microbial communities in full-scale industrial and municipal WWTPs.

CHOOSING AN EFFICIENI TECHNOLOGY OF WASTEWATER SLUDGE DISPOSAL

2020 ◽  
pp. 117-123
Author(s):  
O.V. YANTSEN ◽  
◽  
N.S. SEVRYUGINA ◽  
V.A. GERASIMOV ◽  
A.P. STOROZHEV
Keyword(s):  
Wastewater Treatment ◽  
Water Resources ◽  
Raw Materials ◽  
Treatment Plant ◽  
Wastewater Sludge ◽  
Practical Implementation ◽  
Optimal Method ◽  
Factors Affecting ◽  
Economic Methods ◽  
Materials Used

The article deals with the problem of efficient use of water resources. Factors affecting wastewater treatment and the problem of waste disposal have been identified. It has been established that economic methods should be coordinated with the environmental state in order to rationally manage water resources. The purpose: to reduce the negative environmental burden on water resources by choosing a rational method for the disposal of wastewater sediment. Studies include an analysis of existing methods of wastewater treatment and disposal of sludge. It has been established that the use of the technology for the most complete processing of sewage sludge,utilization of sludge to obtain raw materials for recycling can significantly reduce operating costs. It is accepted as the optimal method to consider the technology of utilization by glazing the sediment, allowing obtaining a granular fraction of raw materials used in the construction industry. An example of the practical implementation of the technology of glazing dehydrated sit cake is presented by a pilot installation at the Shchelkovsite of the sewer treatment plant, as a result of which the amount of wastewater sediment was reduced by almost 25 times.

Disinfection, Recontamination and Regrowth of Indicator Bacteria in a Wastewater Sludge Heat Treatment System

1988 ◽  
Vol 20 (11-12) ◽  
pp. 329-335
Author(s):  
Roger S. Fujioka ◽  
Wesley M. Hirano ◽  
Philip C. Loh
Keyword(s):  
Heat Treatment ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Wastewater Sludge ◽  
Indicator Bacteria ◽  
Primary Sludge ◽  
Heat Treated ◽  
Sludge Cake ◽  
High Concentrations

The largest sewage treatment plant in Hawaii produces 25,400 kg/day of primary sludge that is heat-treated (190°C) under 330 psig for 3 0 min. Although this treatment should result in a sterilized sludge product, the final sludge cake often contains high concentrations of fecal-borne indicator bacteria. The heat-treatment process was shown to disinfect the sludge of indicator bacteria. However, post contamination of the heat-treated sludge by raw sludge and by chlorinated primary effluent and the regrowth of indicator bacteria in the sludge storage tanks resulted in the presence of indicator bacteria in the sludge cake.

Traitement des eaux usées par coagulation-floculation avec recirculation des boues chimiques : Influence des réactifs

2000 ◽  
Vol 27 (4) ◽  
pp. 719-734
Author(s):  
Frédéric Monette ◽  
François G Brière ◽  
Michel Létourneau ◽  
Marc Duchesne ◽  
Robert Hausler
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Pollutant Removal ◽  
Sludge Recycling ◽  
Chemical Sludge ◽  
Flocculation Process

Three series of tests were carried out at laboratory and pilot levels to examine the functions of reagents (coagulant, flocculant, sludge) involved in a coagulation-flocculation process with chemical sludge recycling. Results showed that the recycled sludge participates favourably in the process. The gains in efficiency are particularely significant for lower coagulant concentrations when flocculant concentration is not limitative. The pollutant removal increases with the sludge recycling load but seems reversible and dependent on coagulant concentration. Results also revealed the advantages of recycling sludge before injecting coagulant. To decrease the total chemical costs at a wastewater treatment plant, the strategy must focus on diminishing the coagulant concentration and increasing the flocculant concentration while maintaining a sufficient recycling sludge load to ensure gains in efficiency.Key words: recycling, sludge, preformed flocs, reagents, coagulation-flocculation, treatment, wastewater.

Application of MBR to an easily installed municipal wastewater treatment plant

2000 ◽  
Vol 41 (10-11) ◽  
pp. 287-293 ◽  
Author(s):  
M. Ogoshi ◽  
Y. Suzuki
Keyword(s):  
Wastewater Treatment ◽  
Membrane Permeability ◽  
Wastewater Treatment Plant ◽  
Municipal Wastewater ◽  
Membrane Surface ◽  
Treatment Plant ◽  
Hollow Fibre ◽  
Municipal Wastewater Treatment ◽  
Effluent Quality ◽  
Sludge Cake

An easily installed wastewater treatment plant was developed using an MBR process. The plant consists of inlet pumps, automatic fine screen, a main reactor in which aerator-mixer and MF membrane separators are installed and a control board. The main reactor is a sheeted pond which is easily constructed on-site by an excavation. As a result, the installation of this plant is easy and inexpensive, operation is easy, yet the effluent quality is high. The 50 m3/d pilot plant was constructed in our experimental facility in Ibaraki Pref., and operated from January 1997 to April 1998 to evaluate performance, stability and the ease of separation and installation of each unit. The results were satisfactory in all areas, except the durability of membrane permeability in the latter half of the experiment. For both hollow fibre type and plate type, membrane permeability immediately decreased due to the deposit of concentrated sludge cake on the surface, even though continuous bubble washing had been made. Hence,drastic improvement is needed in the way of sludge deposit control on the membrane surface. This is the key for the developed system to become a practical one.

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