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.

Full scale experience of two stage thermophilic/mesophilic sludge digestion

1997 ◽  
Vol 36 (6-7) ◽  
pp. 449-456 ◽  
Author(s):  
Jürgen Oles ◽  
Norbert Dichtl ◽  
Hans-hermann Niehoff
Keyword(s):  
Degradation Process ◽  
Pilot Scale ◽  
Full Scale ◽  
Process Efficiency ◽  
Anaerobic Sludge ◽  
Process Conditions ◽  
Two Stage ◽  
Operational Conditions ◽  
Digestion Process ◽  
General Goals

The general goals of anaerobic sludge stabilisation are degradation of organic substances, reduction of solids, decrease of pathogenic bacterias, improvement of dewatering capabilities and production of biogas. The anaerobic degradation process can be divided in several steps with different optimum operational conditions. This gives the possibility to design treatment plants as a two-stage process, optimizing the process conditions in each step and thereby leading to an overall increase in process efficiency. Research results in lab scale and pilot scale have shown that a two-stage digestion process with a high loaded first thermophilic (50-55°C) stage and a second stage under mesophilic (35-37°C) conditions with sufficient retention time will lead to the best results. After giving a short summary of the development of the two-stage thermophilic/mesophilic digestion process the paper will present full scale experiences with this system in Germany.

‘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).

scholarly journals New findings on the anaerobic co-digestion of thermally pretreated sludge and food waste: lab and pilot scale studies

2021 ◽  
Author(s):  
Andrés Donoso-Bravo ◽  
Javiera Toledo-Alarcón ◽  
Valentina Ortega ◽  
Valeria Barría ◽  
Yves Lesty ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Food Waste ◽  
Negative Impact ◽  
Biogas Production ◽  
Pilot Scale ◽  
Special Focus ◽  
Innovative Strategy ◽  
Treated Sewage ◽  
New Findings ◽  
The Impact

Abstract Co-digestion of thermally pre-treated sewage sludge with food waste is an innovative strategy that could improve the balance and availability of nutrients needed to increase the efficiency of anaerobic digestion in terms of biogas production. In this context, the aim of this research was to evaluate the impact of different proportions of sewage sludge/food waste in lab and pilot scale reactors. Special focus was placed on the impact of the variability of food waste composition on the behavior of the pilot digester. Our results show that by adding 40% of co-substrate, a higher biogas production was possible during laboratory operation. Interestingly, using a co-substrate of variable composition had no negative impact on the reactor's stability at pilot scale, promoting an increase in biogas production through a more efficient use of organic matter. In both the lab and pilot experiences there was an impact on the amount of nitrogen in the digestate compared to digester operating in monodigestion. This impact is more significant as the proportion of cosubstrate rises. Overall, our results show that co-digestion of thermally pretreated sewage sludge with food waste allows better management of food waste, especially when their composition is variable.

scholarly journals Sorption Characteristics and Removal Efficiency of Organic Micropollutants in Drinking Water Using Granular Activated Carbon (GAC) in Pilot-Scale and Full-Scale Tests

Water ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 2053
Author(s):  
Oksana Golovko ◽  
Luana de Brito Anton ◽  
Claudia Cascone ◽  
Lutz Ahrens ◽  
Elin Lavonen ◽  
...  
Keyword(s):  
Drinking Water ◽  
Early Detection ◽  
Removal Efficiency ◽  
Solid Phase ◽  
Drinking Water Treatment ◽  
Pilot Scale ◽  
Full Scale ◽  
Organic Micropollutants ◽  
Full Scale Tests ◽  
The Impact

Granulated active carbon (GAC) is commonly used as a chemical barrier for the removal of organic micropollutants (OMPs) in drinking water treatment plants (DWTPs). However, little is known about the impact of dissolved organic carbon (DOC) and its long-term performance with regard to OMP removal efficiency. This study examined the performance of two GAC types (Norit 830W and Filtrasorb 400) in the removal of OMPs and DOC from natural lake water, in pilot-scale and full-scale tests run for almost one year. Potential early warning indicators of the exhaustion of GAC sorption capacity were also evaluated. The seven OMPs investigated (carbamazepine, lamotrigine, cetirizine, fexofenadine, oxazepam, fluconazole and N,N-diethyl-meta-toluamide (DEET)) all showed decreasing removal efficiencies after ~20,000 bed volumes (BV) in the pilot-scale Norit 830W and Filtrasorb 400 columns. However, columns with an 18-min empty bed contact time (EBCT) showed better performances than columns with 6-min EBCT. DEET was the OMP adsorbed most weakly. We found that DOC concentrations, methylene blue sorption kinetics, UV and fluorescence did not sufficiently explain the OMP breakthrough in the GAC columns. We concluded that carbamazepine, lamotrigine and fexofenadine can be used as indicators of decreasing GAC adsorption performance, due to their later breakthrough. Based on the results, UV and fluorescence removal could be used for the early detection of declining DOC removal, and online solid-phase extraction (SPE)–liquid chromatography–tandem mass spectrometry (SPE-LC-MS/MS) could be used for the early detection of OMPs in drinking water.

Anaerobic Sludge Digestion in Industrial Wastewater Treatment

1991 ◽  
Vol 24 (1) ◽  
pp. 61-68 ◽  
Author(s):  
Jaakko A. Puhakka
Keyword(s):  
Industrial Wastewater ◽  
Experimental Approach ◽  
Pulp Mill ◽  
Pilot Scale ◽  
Research Strategy ◽  
Anaerobic Sludge ◽  
Industrial Sludge ◽  
Sludge Digestion ◽  
Operation Costs

A research strategy for evaluation of anaerobic digestion method for industrial sludge treatment is presented. The experimental approach is described as a case study. This case study with pulp mill waste activated sludge involved the following steps: preliminary tests to determine the biodegradability of sludge samples, process optimization in laboratory-scale reactors, and the evaluation of design criteria in a pilot-scale study. The investment and operation costs of full-scale application are discussed.

Anaerobic co-digestion of sewage sludge and primary clarifier skimmings for increased biogas production

2013 ◽  
Vol 67 (1) ◽  
pp. 174-179 ◽  
Author(s):  
S. Alanya ◽  
Y. D. Yilmazel ◽  
C. Park ◽  
J. L. Willis ◽  
J. Keaney ◽  
...  
Keyword(s):  
Water Pollution ◽  
Sewage Sludge ◽  
Pollution Control ◽  
Biogas Production ◽  
Control Plant ◽  
Treatment Plant ◽  
Pilot Scale ◽  
Water Pollution Control ◽  
Study Results ◽  
The Impact

The objective of the study was to identify the impact of co-digesting clarifier skimmings on the overall methane generation from the treatment plant and additional energy value of the increased methane production. Biogas production from co-digesting clarifier skimmings and sewage sludge in pilot-scale fed-batch mesophilic anaerobic digesters has been evaluated. The digester was fed with increasing quantities of clarifier skimmings loads: 1.5, 2.6, 3.5 and 7.0 g COD equivalent/(L·d) (COD: chemical oxygen demand). Average volatile solids reduction of 65% was achieved in the scum-fed digester, compared with 51% in the control digester. Average 69% COD removal was achieved at highest scum loading (7 g COD eq/(L·d)) with approximate methane yield of 250 L CH4/kg COD fed (4 ft3/lb COD fed). The results show that scum as co-substrate in anaerobic digestion systems improves biogas yields while a 29% increase in specific CH4 yield could be achieved when scum load is 7 g COD eq/(L·d). Based on the pilot-scale study results and full-scale data from South East Water Pollution Control Plant and Northeast Water Pollution Control Plant the expected annual energy recovery would be approximately 1.7 billion BTUs or nearly 0.5 million kWh.

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

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