‘Technology transfer-oriented research and development in the wastewater sector – validation at industrial-scale plants’ (EXPOVAL) – Subgroup 6: solar sewage sludge drying: first results from investigations with a pilot plant

2015 ◽  
Vol 10 (2) ◽  
pp. 371-380
Author(s):  
R. Dellbrügge ◽  
K. Bauerfeld ◽  
N. Dichtl ◽  
A. Großer ◽  
S. Paris
Keyword(s):  
Sewage Sludge ◽  
Pilot Plant ◽  
Subsequent Development ◽  
Pilot Scale ◽  
Full Scale ◽  
Fecal Coliforms ◽  
Climate Data ◽  
First Results ◽  
Sludge Drying ◽  
Kjeldahl Nitrogen

Drying sewage sludge is a major aspect of biosolids management. Several investigations were performed in a pilot-scale solar dryer for the subsequent development of design rules for solar dryers. The pilot dryer was operated outside simultaneously with a full-scale dryer and, later, in a building. Total solids in the sludge and climate data were analyzed and logged regularly during drying. The fecal coliform and ammonium content was measured as well. Operation next to the full-scale plant was intended to enable comparison of their evaporation rates. The pilot plant was operated in a building in order to assess the influence of external heat input on the drying process. The results showed constant drying progress and that drying was feasible. Although differences in evaporation rates arising from operation, aeration and scaling existed, evaporation rates comparable to full-scale dryers were observed. Under floor heating improved evaporation rates by 25%. More than 50% of total Kjeldahl nitrogen was degraded, and this could be detected as NH3 in the discharged air. Reduction in fecal coliforms could be achieved without reaching secure disinfection, as required by USEPA standard 503 (USEPA 2007).

Solving fecal coliform growth/reactivation in biosolids during full-scale post-digestion processes

2005 ◽  
Vol 52 (1-2) ◽  
pp. 283-288 ◽  
Author(s):  
R. Iranpour ◽  
R. Palacios ◽  
H.H.J. Cox ◽  
V. Abkian
Keyword(s):  
Los Angeles ◽  
Fecal Coliform ◽  
Treatment Plant ◽  
Pilot Scale ◽  
Full Scale ◽  
Fecal Coliforms ◽  
Anaerobic Digesters ◽  
Plant Conversion ◽  
Thermophilic Anaerobic Digestion ◽  
The City

Fecal coliform recurrence has been observed at the City of Los Angeles Hyperion Treatment Plant during pilot-scale experiments with a designated thermophilic battery of six anaerobic digesters, while other digesters were still at a mesophilic temperature. Several lab and full-scale experiments indicated the following possible causes of the growth/reactivation of fecal coliforms in post-digestion: a) contamination of thermophilically digested biosolids with mesophilically digested biosolids; b) a large drop in the biosolids temperature between the centrifuges and silos, which could have allowed the reactivation and/or growth of fecal coliforms. These were resolved by the full plant conversion to thermophilic anaerobic digestion and design modifications of the post-digestion train.

Vermicomposting of sewage sludge: a new technology for Mexico

2002 ◽  
Vol 46 (10) ◽  
pp. 153-158 ◽  
Author(s):  
L. Cardosa Vigueros ◽  
E. Ramírez Camperos
Keyword(s):  
Sewage Sludge ◽  
Water Hyacinth ◽  
New Technology ◽  
Pilot Scale ◽  
Exchange Capacity ◽  
Fecal Coliforms ◽  
High Concentration ◽  
Cocoon Production ◽  
Cationic Exchange ◽  
Restricted Use

In Mexico 31% of the treatment plants have a flow less than 60 l/s. This study offers a simple and economical alternative through vermicomposting to resolve the management of sewage sludge and water hyacinth for these small treatment plants. This study was developed with laboratory and pilot scale systems. In the laboratory Eisenia foetida survival was quantified. They were fed three doses of sludge and water hyacinth and different percentages of humidity were applied. The production of worm cocoons was quantified as biomass production and the reduction in the TV/STS ratio as an indicator of stability. To install the pilot system the mixture with the highest cocoon production was chosen. In the pilot test the effect of the worm population density on the waste degradation was observed, the experiment was divided into five modules, four with densities from 2.5 to 15 kg/m2 and one module without worms that served as a blank test. Results: the best mixture was 70% sewage sludge and 30% water hyacinth, with 80% humidity and an average production of 298 cocoons/kg of vermicompost. There were no significant differences in the TVS/TS reduction between the different modules with worms, but in the blank test module there was no reduction. The Type A vermicompost obtained, with non-restricted use, 900 fecal coliforms NMP/g, 0.0 helminth ova/g, highly organic (60% M.O.), high concentration of total nitrogen (2.5%), phosphorus (0.96%) and cationic exchange capacity (60.2 meq/100 g), which indicates that soil fertility would increase if used in agriculture.

Performance of a system with full- and pilot-scale sludge drying reed bed units treating septic tank sludge in Brazil

2015 ◽  
Vol 71 (12) ◽  
pp. 1751-1759 ◽  
Author(s):  
Luisa Fernanda Calderón-Vallejo ◽  
Cynthia Franco Andrade ◽  
Elias Sete Manjate ◽  
Carlos Arturo Madera-Parra ◽  
Marcos von Sperling
Keyword(s):  
Oxygen Demand ◽  
Pilot Scale ◽  
Full Scale ◽  
Septic Tank ◽  
Feeding Strategies ◽  
Second Phase ◽  
Scale Unit ◽  
Belo Horizonte ◽  
Reed Bed ◽  
Sludge Drying

This study investigated the performance of sludge drying reed beds (SDRB) at full- and pilot-scale treating sludge from septic tanks in the city of Belo Horizonte, Brazil. The treatment units, planted with Cynodon spp., were based on an adaptation of the first-stage of the French vertical-flow constructed wetland, originally developed for treating sewage. Two different operational phases were investigated; in the first one, the full-scale unit was used together with six pilot-scale columns in order to test different feeding strategies. For the second phase, only the full-scale unit was used, including a recirculation of the filtered effluent (percolate) to one of the units of the French vertical wetland. Sludge application was done once a week emptying a full truck, during 25 weeks. The sludge was predominantly diluted, leading to low solids loading rates (median values of 18 kgTS m−2year−1). Chemical oxygen demand removal efficiency in the full-scale unit was reasonable (median of 71%), but the total solids removal was only moderate (median of 44%) in the full-scale unit without recirculation. Recirculation did not bring substantial improvements in the overall performance. The other loading conditions implemented in the pilot columns also did not show statistically different performances.

Robustness of the microaerobic removal of hydrogen sulfide from biogas

2012 ◽  
Vol 65 (8) ◽  
pp. 1368-1374 ◽  
Author(s):  
I. Díaz ◽  
M. Fdz-Polanco
Keyword(s):  
Hydrogen Sulfide ◽  
Sewage Sludge ◽  
Pilot Plant ◽  
Full Scale ◽  
Process Performance ◽  
Short Term ◽  
Removal Process ◽  
Sulfide Production ◽  
Hydrogen Sulfide Production

Several disturbances presented in full-scale digesters can potentially affect the efficiency of the microaerobic removal process. This study evaluates the variation of the sulfur load and the performance of the system in situations of oxygen lack or excess and after normal rates are recovered. The process was shown to recover from oxygen lack or excess within 28 h when the original conditions were restored in a pilot-plant digester of 200 L treating sewage sludge with HRT of 20 days. The decrease of the sulfur load to the digester did not affect the biogas composition in the short-term and when oxygen rate was reduced to adjust to the lower hydrogen sulfide production, the removal proceeded normally with a lower unemployed oxygen amount. The digester opening to remove accumulated sulfur in the headspace did not alter process performance once the microaerobic removal was restarted.

Feasibility analysis of print pastes co-disposal in anaerobic sludge digesters

1997 ◽  
Vol 36 (2-3) ◽  
pp. 181-188
Author(s):  
L. Bonomo ◽  
A. Rozzi ◽  
F. Malpei
Keyword(s):  
Sewage Sludge ◽  
Industrial Wastewater ◽  
Pilot Scale ◽  
Treatment Costs ◽  
Full Scale ◽  
Feasibility Analysis ◽  
Anaerobic Sludge ◽  
Technical Feasibility ◽  
The Future ◽  
The Impact

Significant amounts of residual print pastes are produced by the industrial textile settlements of the Como area (Italy). Currently, these wastes are directly discharged in the sewer but it is unlikely that in the future this treatment through POTW will be further allowed. Therefore alternative ways of collection and disposal must be evaluated. The most suitable processes appear to be: drying, followed by incineration or landfilling, or anaerobic co-treatment with sewage sludge. The latter option was investigated at pilot scale and a technical feasibility analysis of the full-scale solution was carried out. Results are presented and discussed with reference to the impact that this solution would have on the performance of POTW and on the treatment costs of textile industrial wastewater.

scholarly journals Demand-Driven Biogas Production from Anaerobic Digestion of Sewage Sludge: Application in Demonstration Scale

2021 ◽  
Author(s):  
Mauro Lafratta ◽  
Rex B. Thorpe ◽  
Sabeha K. Ouki ◽  
Achame Shana ◽  
Eve Germain ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Biogas Production ◽  
Pilot Scale ◽  
Full Scale ◽  
Operational Environment ◽  
Biogas Yield ◽  
Feeding Regimes ◽  
Generation Capacity ◽  
Flexible Generation

Abstract The power system needs flexible electricity generators. Whilst electricity generation from anaerobic digestion (AD) of sewage sludge has traditionally been baseload, transforming the generation capacity into a modern flexible operator is an opportunity to further valorise the resource. This work aims to demonstrate that AD of sewage sludge can support flexible generation and be operated dynamically in a relevant operational environment, to promote full scale implementation. A demonstration scale plant (20 m3 conventional AD reactors) was used to test several feeding regimes designed to return a biogas production rate that matches the demand. Two demand profiles are defined, either by common corporate power purchase agreements or by the main balancing mechanism used by the grid operator in UK. Demand-driven biogas production is demonstrated in this relevant operational environment, and the flexibilisation performance is positive in all scenarios. The value of the biogas increases by up to 2%, which outperforms the results obtained at pilot scale. Additionally, an increase in biogas yield is observed. Whilst transitional imbalances are recorded, they last for few hours and the overall stability is not affected. In conclusion, these trials demonstrate demand-driven biogas production is a feasible operational solution and full-scale implementation is possible. Graphical Abstract

A Full-Scale Demonstration Food Waste and Sewage Sludge Co-Digestion Project at the Joint Water Pollution Control Plant

2015 ◽  
Vol 2015 (15) ◽  
pp. 3796-3806
Author(s):  
Robert Morton ◽  
James Ecker ◽  
Robert Hickey ◽  
Daniel Gary ◽  
Andy Lee ◽  
...  
Keyword(s):  
Water Pollution ◽  
Sewage Sludge ◽  
Food Waste ◽  
Pollution Control ◽  
Control Plant ◽  
Full Scale ◽  
Water Pollution Control

Thermal Modeling of Biological Mustard Hydrolysate Treatment Reactors and Full-Scale Simulated Testing at the Pueblo Chemical Agent-Destruction Pilot Plant

2015 ◽  
Vol 2015 (6) ◽  
pp. 5907-5927
Author(s):  
Paul J Usinowicz ◽  
George Lecakes ◽  
Thomas C Spear ◽  
Zack Burger ◽  
Charles Oclassen ◽  
...  
Keyword(s):  
Pilot Plant ◽  
Thermal Modeling ◽  
Full Scale ◽  
Chemical Agent

Upgrading of waterworks with a new biooxidation process for removal of manganese and iron

1998 ◽  
Vol 37 (9) ◽  
pp. 121-126 ◽  
Author(s):  
T. Hedberg ◽  
T. A. Wahlberg
Keyword(s):  
Organic Matter ◽  
Water Treatment ◽  
Surface Water ◽  
Pilot Plant ◽  
Previous Treatment ◽  
Full Scale ◽  
Unit Operations ◽  
Treatment Water

The paper describes how waterworks can be upgraded by the use of microbiologically unit operations to make it possible to remove manganese from groundwater and surface water. Pilot plant studies and full-scale plant studies show that conventional oxidants as permanganate may be replaced by biooxidation thus reducing the use of chemicals in water treatment. Water containing high amounts of Fe and/or Mn and organic matter may be difficult to treat and pilot plant studies are therefore recommended. This study shows that one ground waterworks and one surface waterworks succed in removing manganese where previous treatment with permangante had failed.

Enhancing nitrogen removal efficiency in a dyestuff wastewater treatment plant with the IFFAS process: the pilot-scale and full-scale studies

2017 ◽  
Vol 77 (1) ◽  
pp. 70-78 ◽  
Author(s):  
Yanjun Mao ◽  
Xie Quan ◽  
Huimin Zhao ◽  
Yaobin Zhang ◽  
Shuo Chen ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Pilot Scale ◽  
Full Scale ◽  
Nitrification And Denitrification ◽  
Dyestuff Wastewater

Abstract The activated sludge (AS) process is widely applied in dyestuff wastewater treatment plants (WWTPs); however, the nitrogen removal efficiency is relatively low and the effluent does not meet the indirect discharge standards before being discharged into the industrial park's WWTP. Hence it is necessary to upgrade the WWTP with more advanced technologies. Moving bed biofilm processes with suspended carriers in an aerobic tank are promising methods due to enhanced nitrification and denitrification. Herein, a pilot-scale integrated free-floating biofilm and activated sludge (IFFAS) process was employed to investigate the feasibility of enhancing nitrogen removal efficiency at different hydraulic retention times (HRTs). The results showed that the effluent chemical oxygen demand (COD), ammonium nitrate (NH4+-N) and total nitrogen (TN) concentrations of the IFFAS process were significantly lower than those of the AS process, and could meet the indirect discharge standards. PCR-DGGE and FISH results indicated that more nitrifiers and denitrifiers co-existed in the IFFAS system, promoting simultaneous nitrification and denitrification. Based on the pilot results, the IFFAS process was used to upgrade the full-scale AS process, and the effluent COD, NH4+-N and TN of the IFFAS process were 91–291 mg/L, 10.6–28.7 mg/L and 18.9–48.6 mg/L, stably meeting the indirect discharge standards and demonstrating the advantages of IFFAS in dyestuff wastewater treatment.

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