Wednesday, 27 July 2016

Southern Landfill Visit

To get a better understanding of how Wellington handles both its trash and recycling I decided to go to the Southern Landfill to talk with the staff and see what problems there might be. Through the Wellington City Council website I contacted Wendy Bertholet who is a Waste Educator at the landfill. She agreed to meet with me and show me around as part of the free tours the council offers.

Southern Landfill Entrance Sign

     The first thing I learnt was that all the different regions of New Zealand oversee and run their own rubbish collection. Different councils can run their own initiatives that in no way affect other regions.
     Rubbish collection in Wellington is free and does not come from taxes. Drops made at the landfill using the weigh scales and the yellow general rubbish bags fund the collection and processes at the landfill. The collection of both recycling and trash is dependent on where the person lives in Wellington. Apartment buildings are responsible for their own rubbish as the likelihood of contaminated products is too high to warrant regular pickup. General residents in the city can put their recycled items in clear plastic bags on the curb instead of using the blue co-mingle bags. Residents outside of the city can apply for a pack of 52 recycle bags a year for free.

     One issue faced with both the blue and yellow bags is they themselves are non-recyclable. The plastic used is thicker than the average plastic bag to help prevent rips but this is still an area worth looking into due to the number of bags that get processed.
     An alternative to the bags is the black and yellow wheelie bins that are used for co-mingle recycling and the green glass bins. The use of these bins are taken quite strictly and after speaking with a member of the teams that investigates into the misuse of these bins I found out that house and even streets can be banned from recycling if the rules are not followed. Even putting glass in general rubbish can result in fines as the glass is crushed in the truck with all the general rubbish and contaminates the whole load. Once a house has had 3 strikes, their bins are taken away and no more recycling will be picked up from their residence.
     Not all houses can be given the wheelie bins however. The bins will not be given to houses on one way roads, busy streets, have no foot path and have more than a 13* gradient hill.
     The rules set out for these bins appears straight forward but it was brought up that a way to make sure people that people follow the rules of recycling will be of use to the council as this means they do not have to send people out to deal with bad recycling.

 Confiscated bin for incorrect recycling
 Confiscated bins for incorrect recycling
 Recycling Bin Storage
Recycling Bin Storage

     The southern landfill itself is a Class A landfill and consists of 3 sites. The first site is under the car park at the Second Treasures shop, a second is currently being settled and a third is being filled. The methane gas is filtered off of the landfills and is turned into electricity to power 1000 homes a year by Nova Energy. Daily Waste deal with curb side pick ups and Enviro Waste for recycling. The collection of recycling is done bi weekly. Co-mingle recycling is one week and glass the following.
      The plastic recycling is split depending on what the PET levels are. Levels 1 and 3-7 are sent to China to be processed while level 2 is sent to Palmerston North and Auckland. Glass is separated by Clear, Brown and Green and sent to O-I in Auckland. Metal is separated between Macaulay Metals for aluminium and Pacific Steel Group for steel. Cardboard is sent to Auckland to be remade by Carter Holt Harvey.
 Recycle bins at Second Treasures Carpark
 Recycle bins at Second Treasures Carpark
 Co-mingle Recycling Rules
 Cardboard Recycling Rules
 Glass Recycling Bin at Second Treasure Carpark
 Glass Recycling Rules
Nova Energy Electricity Generation Plant
 Nova Energy Electricity Generation Plant
Nova Energy Electricity Generation Plant

     Composting is a final aspect that is handled at the landfill. Using a windrow technique and constant turning, the compost can be made within 100 days. The compost is used from food and green waste. The result can be bought from the Second Treasures shop and helps to fund the free rubbish collection.

Monday, 25 July 2016

Zero Waste

How This Town Produces No Trash
  • https://www.youtube.com/watch?v=eym10GGidQU
    • The town used 34 different recycling bins to fully seperate all of their waste.
    • Roughly 80% of their waste is recycled, reused or composted.
    • Plastic containers are washed to remove all food waste before recycling.
Can You Live Without Producing Trash
  • https://www.youtube.com/watch?v=nYDQcBQUDpw
    • Composting and buying in bulk can save a lot of wadte. Bringing your own containers that can be refilled can remove the need for lots of packaging.
    • 3 steps that are reccomened to reduce waste.
      • Know your trash
      • Use reusable bags and items
      • Make your own products
How San Francisco is Becoming a Zero Waste City
  • https://www.youtube.com/watch?v=Cg3OA1s8-SI
    • San Francisco collect 650 tonnes of food scraps and garden trimming every day that now gets turned into compost
    • The watse is ground up and checked for plastic and other trash before being air-rated and watered. A piping system also filters out the green houses.
San Francisco Department of the Environment
  • http://sfenvironment.org/zero-waste/recycling-and-composting
  • http://sfenvironment.org/article/recycling-and-composting-residential-recycling-and-composting-business-recycling-and-composting/compost-recycle-in-san-francisco
    • San Francisco waste and recycling is organised into 5 sections
      • Compost
      • Recycle
      • Safely Dispose
      • Landfill
      • Give Away
    • Compost
      • Food
      • Plant Trimmings
      • Soiled Paper Products
    • Recycle
      • Plastic
      • Metal
      • Glass
      • Paper
    • Safely Dispose
      • Batteries
      • Light Bulbs
      • Household Hazardous Waste
      • Business Hazardous Waste
    • Landfill
      • Mylar Film (Glad Wrap)
      • Aseptic Containers
      • Special Glass
      • Ceramics
    • Give Away
      • Donate unwanted items
  • San Francisco aims to be a zero waste city by 2020

General Recycling


  • Recycling by Material
    • https://en.wikipedia.org/wiki/Recycling_by_material
  • Which Materials can you Recycle
    • http://www.dummies.com/how-to/content/which-materials-can-you-recycle.html


Plastic

  • Heat Compression
    • Taking all types of plastics both soft ans hard to and passing them through heated tumblers into a single material
  • Thermal Depolymerization
    • Using chemicals to break down the plastic to turn into petroleum and other fuels

  • Plastic Recycling
    • https://en.wikipedia.org/wiki/Plastic_recycling
  • Recycling Plastics Today: A Growing Solution
    • https://www.youtube.com/watch?v=s5p6Nk3SzcU

Glass:
  • The glass products are cleaned and separated by colour into Flint (clear), Amber (brown) and Green.
  • The glass is crushed into cullet and added to raw materials comprised of Soda Ash, Limestone and Silica Sand
  • New items can then be blown or molded from the material

  • The Smashing Story of Recycled Glass
    • https://www.youtube.com/watch?v=6R8YObQbE88
  • Glass Recycling
    • https://www.youtube.com/watch?v=ZHEY3LkBHU8

Metal
  • Metal items can be easily separated using magnets and are the largest recycled material in the world. The cans can be crushed into bales for easy transportion.
  • Steel cans can be recycled with no loss of quality through remelting
  • Aluminium can also be recycled with no loss of quality can saves 95% of the energy of making one from scratch.

  • Rexam's Full Circle Film - The Life Cycle of an Aluminium Can]
    • https://www.youtube.com/watch?v=7dK1VVtja5c

Cardboard
  • Cardboard is separated between 2 categories. Box card (cereal boxes) and corrugated cardboard.
  • The cardboard is soaked in water and chemicals to break down the fibers to a pulp.
  • The pulp is fed through filters to remove glue, tape and ink.
  • The pulp is then combined with fresh pulp to add strength to the weaken fibers.
  • The combined pulp mix is finally pushed through various heated rollers to remove any remaining water and dry the cardboard into sheets.

  • Process of Recycling Cardboard
    • http://www.livestrong.com/article/174486-process-of-recycling-cardboard
  • How Cardboard is Recycled
    • https://www.youtube.com/watch?v=Bx0ozMweqoU

Food
  • Landfills
    • Produces large amounts of Methane Gas as it decomposes
    • Attracts vermin, flies and birds
  • Animal Feed
    • Feeding scraps to animals saves the waste from entering landfills. This creates less air pollutants than food scraps in landfills.
  • Composting
    • Food waste can be composted to reuse as fertile soil in around 60-100 days
    • Vermicomposting is using worms to help break down the scraps

On the Wellington City Council website lists what can and can;t be put into compost bins.
  • Can be Composted
    • Vegetable and Fruit Scraps
    • Cooked Meat Scraps
    • Cooked Bones
      • Small to Medium
    • Shells
      • Oyster, Mussel, Clam, Crab, Eggs
    • Bread and Baking Products
    • Cheeses, Desserts and Cream
    • Coffee Grounds and Filters
    • Nuts and Cereals
    • Pasta and Rice
    • Tea Bags and Tea Leaves
    • Flowers, Plants and Garden Waste
    • Unbleached Paper Serviettes
    • Compostable Packaging
      • Paper, Potato
  • Can't be Composted
    • Large Cooked Bones
    • Raw Bones of any size
    • Raw Fish and Meat
    • Oils, Liquid Waste
    • Oil Based Plastics
    • Cigarette Butts
    • Cleaning Products
    • Cloth
      • Tea Towels
    • General Rubbish and Recycling

  • Food Waste
    • https://en.wikipedia.org/wiki/Food_waste
  • Food Waste Recycling in Hong Kong
    • https://en.wikipedia.org/wiki/Food_waste_recycling_in_Hong_Kong
  • Food Waste
    • http://wellington.govt.nz/services/environment-and-waste/rubbish-and-recycling/recycling/businesses/food-waste
  • Household Food Waste
    • http://wellington.govt.nz/services/environment-and-waste/rubbish-and-recycling/recycling/food-waste

Initial Concept

The initial concept for my studio project is a in-built kitchen counter can crusher.

Over the holidays I did a lot of cooking and the amount of tin cans for tinned tomatoes, baked beans, etc took up a lot of space in my rubbish bin. The cans I put in the bin were full size and had not been crushed or flattened in any way. While I myself posses the strength to flatten the cans partially, other people do not. If a machine could do this job then the cans will be much smaller and save more space in the pre-paid council recycling bags.

After talking with my lecturer about my project, the main piece of feedback I was given was to take a step back and look at all recycling and not focus too quickly on just cans. By doing this I will get a much more in-depth knowledge of the whole process and it will also give me more information to call upon when designing my 3 concepts.