Difference between revisions of "B3 - Test run"

Revision as of 08:59, 15 July 2011

B3 - Test run
Batch digestion tests with controlled input
Calibration of COWS subsystem
Incremental optimisation of the full process
Test of operational limits
M - Validation of full scale COWS process
D5 - COWS performance report

Description and methods employed (what, how, where and when)

The main purpose of this action is to get:

• optimal processing through the COWS pre-treatment prototype subsystem;
• optimal overall performance of the plant

In order to achieve this goal adjustment and balancing of process parameters are to be done.

Adjustments of COWS pre-treatment prototype subsystem depend on the technology adopted; they are anyway similar in both cases of screw-press and piston-press (the most probable technologies). It would be different for hydro-mechanical separation.

We take as reference the extrusion process.

In order to evalute the performance of pre-treatment unit (COWS prototype) the presence of contaminants will be consider the principal factor. The following contaminants/contrary materials are measured (relative to the organic fraction)

• Organic
• Plastics
• Metals
• Glass
• Textiles
• Wood
• Paper
• Inerts

Adjustments should consider the performance of each stage and the effects on subsequent steps. Characterization will be made at each step on residuals and in-flow materials, starting from influent OFMSW characterisation. Following steps are:

• after pre-treatment, out of the press/screw system;
• mixer content (floating, pulp precipitate, pulp outflow);
• digester (fermentation values and digestate)
• surnatants

Adjustment of the prototype can be done acting on

r la messa a punto del prototipo potremmo variare la tipologia del cestello di estrusione, la pressione del pistone di ingresso nel cestello di estrusione, potremmo spingere l'apertura dei sacchi prima dell'immissione nel prototipo valutando se introdurre una balnda pretriturazione

Process data monitored are those in table 1 and 2 <ref name="processdata"> Table 1 – Characteristics of OFMSW influent (average monthly) and Table 2 – Average monthly total VSS and COD load of sludge (PS+WAS) and OF-MSW </ref>

Constraints and assumptions

Indicate what may prevent you from implementing the action as planned and what will be done to address this risk. Please ensure that these constraints and assumptions are in line with those indicated on Form B5.

Beneficiary responsible for implementation

Please indicate which of the project's beneficiaries will be in charge of the implementation of each action. Should more than one beneficiary be implicated, please give full details of which beneficiary is responsible for what.

Expected results

Please indicate (preferably in bullet points) the quantified/measurable results/outputs from the action. Please indicate whether they will be used in other actions and how.

Indicators of progress

Please indicate how progress of this action will be measured. The descriptions may be accompanied by explanatory graphs, tables or pictures which may be included in the forms by using the “Pictures” check box.

Notes and References

<references />

Table 1 – Characteristics of OFMSW influent (average monthly)

Table 2 – Average monthly total VSS and COD load of sludge (PS+WAS) and OF-MSW

Nomenclature

CHP – Combined Heat and Power

COD – Chemical Oxygen Demand

HRT – Hydraulic Retention Time

OLR – Organic Loading Rate

OF-MSW – Organic Fraction of Municipal Solid Waste

PS – Primary Sludge

TSS – total Suspended Solids

VSS – Volatile Suspended Solids

WAS – Waste Activated Sludge

WWTP – Wastewater Treatment Plant