Life cycle analysis of RusaLCA system Alenka Mauko Pranji , Janez - - PowerPoint PPT Presentation

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Life cycle analysis of RusaLCA system Alenka Mauko Pranji , Janez - - PowerPoint PPT Presentation

Sep 17, 2023 22 likes •404 views

Life cycle analysis of RusaLCA system Alenka Mauko Pranji , Janez Turk Slovenian National Building and Civil Engineering Institute, Laboratory for Concrete, Stone and Recycled Materials What /Who is RusaLCA? LIFE RusaLCA - Nanoremediation of

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Life cycle analysis of RusaLCA system

Alenka Mauko Pranjić, Janez Turk

Slovenian National Building and Civil Engineering Institute, Laboratory for Concrete, Stone and Recycled Materials

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LIFE RusaLCA - Nanoremediation of water from small waste water treatment plants and reuse of water and solid remains for local needs

What /Who is RusaLCA?

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LIFE RusaLCA - Nanoremediation of water from small waste water treatment plants and reuse of water and solid remains for local needs

  • A RUSALKA is a water nymph a female spirit in

Slavic mythology and folklore.

Ivan Kramskoi, The Mermaids, 1871

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LIFE RusaLCA - Nanoremediation of water from small waste water treatment plants and reuse of water and solid remains for local needs

Antonin Dvorak: Rusalka

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LIFE RusaLCA - Nanoremediation of water from small waste water treatment plants and reuse of water and solid remains for local needs

LIFE RusaLCA – Nanoremediation of water from small waste water treatment plants and reuse of water and solid remains for local needs

  • with LCA (meaning Life Cycle Assessment) in

the name

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LIFE RusaLCA - Nanoremediation of water from small waste water treatment plants and reuse of water and solid remains for local needs

Three pillars of sustainability

Venn diagram of sustainable development: at the confluence of three constituent parts

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LIFE RusaLCA - Nanoremediation of water from small waste water treatment plants and reuse of water and solid remains for local needs

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LIFE RusaLCA - Nanoremediation of water from small waste water treatment plants and reuse of water and solid remains for local needs

Life cycle thinking - LCT

  • Before: minimising impact from single sources (e.g.

polution: discharges into rivers and emissions from factories)

  • Life Cycle Thinking (LCT): possible improvements to

goods and services in the form of lower impacts and the reduced use of resources across all life cycle stages.

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LIFE RusaLCA - Nanoremediation of water from small waste water treatment plants and reuse of water and solid remains for local needs

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LIFE RusaLCA - Nanoremediation of water from small waste water treatment plants and reuse of water and solid remains for local needs

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LIFE RusaLCA - Nanoremediation of water from small waste water treatment plants and reuse of water and solid remains for local needs

  • 4. From waste to resources:

boosting the market for secondary raw materials and water reuse

„The Commission will take a series of actions to promote the reuse of treated wastewater, including legislation on minimum requirements for reused water.“

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LIFE RusaLCA - Nanoremediation of water from small waste water treatment plants and reuse of water and solid remains for local needs

Three pillars of sustainability

Venn diagram of sustainable development: at the confluence of three constituent parts

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LIFE RusaLCA - Nanoremediation of water from small waste water treatment plants and reuse of water and solid remains for local needs

LCA

Waste water treatment plant:

  • reduce the environmental impact caused by the sewage to the

environment.

  • consumption of resources for construction and operation results

in an impact on the environment. The impact of waste water treatment plant can be analyzed by Life Cycle Assessment method (see literature and/or ISO standard of series 14040).

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LIFE RusaLCA - Nanoremediation of water from small waste water treatment plants and reuse of water and solid remains for local needs

  • Life Cycle Assessment:

an environmental tool which allows calculation of environmental loads related to processes or product or services.

14 Source: Antikainen 2011.

LCA is applied to analyze the environmental performance of waste water treatment plant in Šentrupert municipality (primary and secondary treatment of waste water).

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LIFE RusaLCA - Nanoremediation of water from small waste water treatment plants and reuse of water and solid remains for local needs

  • Primary treatment of waste water:

Protection of the environment from the load of nutrients and

  • ther compounds by complying with water quality parameters

(COD and BOD values at outflow from WWTP).

  • Secondary treatment of waste water (via nano-remediation):

Water is totally purified and can be used for different purposes. The exploitation of groundwater reserves is reduced, what has positive effect on environment (saving natural resources). Additional amount of electrical energy is consumed; Chemical reagents are required; Additional amount of sludge is generated.

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LIFE RusaLCA - Nanoremediation of water from small waste water treatment plants and reuse of water and solid remains for local needs

The LCA is four stage process, which includes:

  • Goal of the study.
  • Inventory analysis: LCA takes into account all relevant inputs

and outputs of a product system through its life cycle.

  • Impact Assessment (impact on various environmental

indicators can be studied).

  • Interpretation of the results.

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LIFE RusaLCA - Nanoremediation of water from small waste water treatment plants and reuse of water and solid remains for local needs

GOAL OF THE STUDY is to evaluate the environmental benefits and eventually also weaknesses of the waste water treatment plant (in Šentrupert) with both primary and secondary treatment processes. The functional unit: In this study, the functional unit is the operation of waste water treatment plant in Šentrupert over a period of one month. System boundaries: Results for operation stage will be shown and presented. Construction stage is excluded, so as sludge treatment and demolition stage after the end-of-life of waste water treatment plant.

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LIFE RusaLCA - Nanoremediation of water from small waste water treatment plants and reuse of water and solid remains for local needs

INVENTORY Primary (biological) treatment of waste water: Input data:

  • Inflow of waste water: around 243 m3.
  • Electricity consumption during the primary treatment.

Output data:

  • 70 % of treated waste water to surface stream.
  • Chemical oxygen demand (COD) at outflow: 150 mg/L,
  • Biochemical oxygen demand (BOD) at outflow: 30 mg/L.

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LIFE RusaLCA - Nanoremediation of water from small waste water treatment plants and reuse of water and solid remains for local needs

Secondary treatment of waste water via nano- remediation: Input data:

  • 30% of water from primary tank is drained to secondary

tank for nanoremediation.

  • Use of chemicals and filters:

Zero-valent iron (0.25 g/L), IZOSAN G (10 mg/L), Activated carbon, Ion exchanger, Sodium chloride for regeneration of filters (0,0007 kg/L).

  • Electricity consumption during the secondary treatment.

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LIFE RusaLCA - Nanoremediation of water from small waste water treatment plants and reuse of water and solid remains for local needs

RESULTS The impact on global warming is relatively increased considering secondary treatment of waste water in addition to primary – biologically treatment. Slight benefit with regard to impact on GWP is related to reduced exploitation

  • f groundwater.

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  • 100

100 200 300 400 500 600 700

GWP

kg carbon dioxide equivalents

Global Warming Potential

Benefits of secondary treatment Secondary treatment Primary treatment

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  • 50

50 100 150 200 250 300 Electricity Activated carbon IZOSAN G Ion-exchanger Zero-valent iron regeneration of filters Delivery of chemicals Benefits kg carbon dioxide equivalents

Global Warming Potential

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LIFE RusaLCA - Nanoremediation of water from small waste water treatment plants and reuse of water and solid remains for local needs

Impact on Eutrophication is almost completely caused during primary treatment due to the outflow of treated water to surface stream. With secondary treatment of 30% of waste water, this water is totally purified and emissions of nutrients to surface stream are reduced, what is considered as a benefit.

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  • 150
  • 100
  • 50

50 100 150 200 250 300

Eutrophication

kg phosphate equivalents

Eutrophication Potential

Benefits of secondary treatment Secondary treatment Primary treatment

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Impact on consumption of groundwater and surface water. The amount of purified water is used for different purposes as has been mentioned. For this reason, extraction of groundwater is reduced, what has a positive impact on saving reserves of groundwater.

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  • 80.000
  • 70.000
  • 60.000
  • 50.000
  • 40.000
  • 30.000
  • 20.000
  • 10.000

10.000

Blue water consumption [kg]

Liters

Blue water consumption

Benefits of secondary treatment Secondary treatment Primary treatment

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LIFE RusaLCA - Nanoremediation of water from small waste water treatment plants and reuse of water and solid remains for local needs

Three pillars of sustainability

Venn diagram of sustainable development: at the confluence of three constituent parts

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LIFE RusaLCA - Nanoremediation of water from small waste water treatment plants and reuse of water and solid remains for local needs

LIFE CYCLE COST ANALYSIS (LCCA)

  • LCCA is a process of evaluating the economic performance for

example of a structure (i.e. WWTP) over its entire life. LCCA balances initial monetary investment with the long-term expense of owning and operating the structure.

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Source: http://www.nlgreenenergysolutions.com

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LCCA of operation stage: The cost analysis showed that main hot spot of the secondary treatment refers to cost of zero-valent iron, which is required for nanoremediation. These costs exceeds costs of extraction of groundwater and production of tap water.

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LIFE RusaLCA - Nanoremediation of water from small waste water treatment plants and reuse of water and solid remains for local needs

CONCLUSIONS

  • Secondary treatment of waste water brings significant

reduction of impacts on eutrophication and results in saving

  • f ground water and surface water reserves.
  • On other hand, impact on some other impact categories is

increased, such as impact on global warming.

  • However, the overall environmental benefits associated with

secondary treatment are expected to exceed above mentioned additional burdens.

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LIFE RusaLCA - Nanoremediation of water from small waste water treatment plants and reuse of water and solid remains for local needs

Three pillars of sustainability

Venn diagram of sustainable development: at the confluence of three constituent parts

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Social life cycle assessment (S-LCA)

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S-LCA of waste water treatment

Padilla-Rivera et al. 2016: Addressing social aspects with wastewater treatment facilities. Env. Imp. Asses. Review 57, 101-113

UNFORTUNATELY, NO RESULTS YET Delay of pilot operation

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Thank you for your attention!

There are no new paths,

  • nly new ways of walking them.

With the pain of the dispossessed, the dark dreams

  • f the child who sleeps with hunger –

I have learned: this Earth does not belong to me alone. And I have learned, in truth, that the most important thing is to work, while we still have life, to change what needs changing, each in our way, each where we are. (Amadeu Thiago de Mello, Brasil‘s poet, activist for protection of the Amazonian rainforest)