Transcript Ploiesti mechanical-biological treatment plant

PLOIESTI MECHANICAL-BIOLOGICAL TREATMENT PLANT
Environmental protection
Department
ing. Dragos Manu
Mechanical-biological treatment plant
Mechanical-biological treatment plant (TMB Plant) - will be placed on administrative territory of the
Municipality of Ploiesti and the sorting station will be located on the city's administrative area Boldesti - Scaeni.
Ploiesti TMB Plant is located about 1.8 kilometers from the inhabited area of Ploiesti City, residence of
Prahova County of and the main source of waste generation, on the right side of County Road DN1A, road that
connect Barcanesti village with Ploiesti city.
Road access is done through the County Road DN1A.
On the proposed site there are no important ecosystems, the land is arable.
The total area of Ploiesti TMB Plant is of about 7 hectares, the land is situated in the inner site.
In terms of geomorphology, land can be characterized as a transition zone of the piedmont plain,
consisting of deluvial deposits of dusty materials - sand mixed with gravel.
Biodegradable waste
Target for biodegradable waste storage in 2013
is represented by reducing the amount deposited by
50% compared to the total amount deposited in
1995.
Thus, the maximum amount of biodegradable
waste that can be stored in 2013 is 92,262 tons of
biodegradable waste, which means that about
115,717 tons of biodegradable waste will be diverted
from storage. For 2016, the maximum amount of
biodegradable waste that can be stored is 64,583,
which means that about 148,655 tons of
biodegradable waste will be diverted from storage.
Diverting biodegradable waste from storage will
be achieved by sorting and recycling of paper,
cardboard and wood waste and by the mechanicalbiological treatment of organic fraction of municipal
waste, both in centralized facilities and by individual
composting in households.
Targets at county level for TMB Plant efficiency
Specific objectives for TMB plants
In accordance with the EU Directive
regarding landfills and national targets for
recycling, some of the specific objectives for
TMB plants are:
1. Waste pre-treatment before storage;
2. Diversion of biodegradable and nonbiodegradable municipal waste before
storage, by mechanical separation of waste in
materials for recycling and/or energy recovery
(waste-derived fuel, RDF);
3. Diversion of biodegradable municipal
waste from storage by:
- Reduction of dry aggregation before
storage;
- Reduction of biodegradability before
storage;
- Stabilization in a compost product
(CLO = Compost Like Output, or “biostabilized
waste"), for land planning and/or
- Transforming in biogas;
PROJECT PARAMETERS
Input flow
Categories of residual waste (biodegradable
and others) resulted and presented in the waste
management system in Prahova county are:
- waste residues from both urban and rural
- residual waste from the public domain (gardens
and parks, markets and streets).
Collection system proposed in the project is
targeting for the residual waste
- individual waste bin for residual waste for
households or a collection point for residual waste
for apartments blocks
- individual bin for biodegradable fraction of rural
households in about 60% of the individual
households
- separate containers for biodegradable fraction
coming from gardens and parks
- separate containers biodegradable fraction coming
from markets
- street residual waste containers.
Technical options for biodegradable waste
treatment
Analysis of the Feasibility Study
and Financing Applications showed
that from all of the technical options to
treat the biodegradable waste the most
feasible is a mechanical - biological
treatment plant.
Mechanical-biological treatment
method (TMB) is a residual waste
processing system that involves both
mechanical and biological processes.
So the mechanical-biological
treatment process proposed for the
residual waste in the Feasibility Study
will consist of two phases:
- mechanical pre-treatment
- stabilization of biodegradable
material in a biological phase
composed of aerobic decomposition
stage and maturing stage.
Capacity of TMB Ploiesti Plant
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TMB Ploiesti Plant capacity will be of 150,000
tons/year and this quantity will be collected from
proposed areas for collection.
Taking into account the small amounts of green
biodegradable waste (from gardens, parks and
markets) compared with the residual waste from
the population, the outcome of TMB plant will be
mainly of LOC (LOC = Compost Like Output, or
“biostabilized waste"), used in activities as
coating material in landfills, degraded or polluted
areas, mine closings, etc..
CLO estimated in the TMB Plant will be of
35.750 tons/year
Good quality compost estimated in the TMB
Plant will be of 2.000 tons/year.
In time, if the market development will require
larger quantities of good quality compost, TMB
Plant will be able to process larger quantities
Components of TMB Plant
TMB Plant is formed by the following components:
• Administrative area;
• Mechanical treatment area;
• Biological treatment area – stage 1 of decomposing;
• Biological treatment area – stage 1 of maturation.
TMB Plant will treat residual waste collected from collection
areas and will consist of:
• the stage of mechanical treatment;
• biological treatment stage: aerobic decomposition;
• maturation platform for 50% of the resulted quantity from
the aerobic decomposition phase.
Technical
specification
Sizing calculations were
performed at the stage of
Feasibility Study for each stage of
mechanical-biological treatment .
• Mechanical pre-treatment stage was sized to a quantity of 150,000
tons/year, operated 260 days per year, with two shifts per day and a
total of 16 hours per day.
• The amount to treat on one working day is 575 tons/day and 38
tones/hour.
• The volume is 1918 cubic meters treated daily.
• Biological treatment phase - the phase of decomposition has been
dimensioned to input a quantity of 112,500 tons/year and a percentage
of reduction of 33%.
• Biological treatment phase - the phase of maturation has been
dimensioned to input a quantity of 37,500 tons and a percentage of
reduction of 5%.
Residual waste follow the next
technological flow
•Weighting the residual waste at their access inside the plant;
•Discharging the waste from rubbish carts or containers from transfer stations, in a
temporary storage area;
•Waste preparation stage (for biological stage) is composed by:
> Manual separation of bulky waste;
> Filling the sacks opener bin;
> Reducing the size using one of the following techniques:
- hammer mill, where the dimensions are significantly reduced by
the hammers hitting;
- chopper - rotating knives or hooks are spinning at slow speed but
high torque, allowing waste shredding;
- ball mill - a rotating drum fitted with heavy balls to reduce the size
of waste;
>Waste separation by various means:
- jiggles and riddles;
- magnetic separators for ferrous metals;
- separators in Foucault current for non-ferrous metals;
- ballistic separators;
- optical methods for separation.
Mechanical treatment stage
Waste will be discharged in the temporary storage
area, a first separation of the bulky waste will be done
manually.
At the end of the mechanical treatment we will have
the following fractions:
Input
waste
Output
flows
Ferrous metals
Daily mass
575.3
tons/day
Specific weight
0.30
tons/m3
Daily volume
1.917,8
m3/day
64
tons/hour
Daily mass
Rejection
25%
Biological treatment
• Biological processes can transform the biodegradable
fraction in compost type product, and/or in biogas
and/or in biostabilized fraction to be stored.
• In TMB Ploiesti Plant, it is foreseen a process of
aerobic decomposition divided in 2 stages:
• A first stage – of intensive aerobic decomposition with
air blasting at the bottom, static, indoors;
• A second stage – of maturing under a metal shed for
50% of the estimated quantities of the first stage (the
remaining 50% will be transported to the landfill where
they will be matured in the warehouse even before
compaction)
Biological treatment
B.1. First stage- decomposition
Aerobic decomposition
B.1. Second stage - maturation
Maturation
The buildings/rooms of TMB Plant
• The buildings/rooms of TMB Plant will be the following:
– Administrative building/containers;
– Mechanical treatment room composed of 2 technological
lines;
– Biological treatment buildings/chambers for aerobic
decomposition stage;
– Maturation room.
• The administrative area will be composed of two
containers, one administrative and one sanitary container
that will serve a number of 33 employees per day
• Mechanical treatment room will be positioned in the vicinity
of the TMB Plant entrance and weighting area.
• Mechanical treatment room will be metalic and will include
two technological lines with adequate equipments.
• Mechanical treatment building is a covered metalic
building, with an estimated surface of 4.757 sqm.
This material is realized on
the basis of: „Waste integrated
management system for Prahova
County” www.cjph.ro
The project will be submitted to
obtain funding under the Regional
Operational Programme Environment, Priority Axis 2.
Images are only informative.
Thank you!