6 replies to this topic

[gkselas]

Hello everybody..i have a project for ice-cream wastes and i can't find the flow diagram that shows from where they are produced, what type of wastes contain and how they process it.If anyone can help me i would be greatful.Happy new Year from Greece!!

[Hongyun]

Hope the attached article helped, though it seemed old... Not sure if it is outdated or not.

Attached Files

•  Newer_Concepts_of_Dairy_Waste_Disposa.pdf   1.5MB   210 downloads

[gkselas]

Thank you Hongyun.. of course it helps but im searching also something about how wastes seem to process as a flow diagram!Although you gave me very useful material thank you!!

[Hongyun]

Hi gkselas,

Another popular method would be the use of Sequencing Batch Reactor.

"Sequencing batch reactors (SBR) or sequential batch reactors are industrial processing tanks for the treatment of wastewater. SBR reactors treat waste water such as sewage or output from anaerobic digesters or mechanical biological treatment facilities in batches. Oxygen is bubbled through the waste water to reduce biochemical oxygen demand (BOD) and chemical oxygen demand (COD) to make suitable for discharge into sewers or for use on land."

More info can be found here.

Another article on biological treatment by SBR here.

Found a brief flowchart (see attached), but not sure if it is what you are looking for specifically.

Attached Files

•  SBR.JPG   17.49KB   54 downloads

[gkselas]

Hi Hongyun,

This method is very interesting (SBR), ill defenetely use it to my project, but the flow is not what im looking for..its like the attached file i have (in the 6th page).
Thank you for helping me and answering to my problem.I hope you understood my english..
If anyone else has something to propose i woulb be happy to hear it.!
We talk again

Attached Files

•  wasteicecreamsosss.pdf   373.39KB   150 downloads

[Charles.C]

Dear gkselas,

Thks yr question and welcome to the forum.

I deduce you are looking for (a) a generic type ice cream process / associated waste sources plus (b) some kind of a mass balance example of typical inputs / outputs plus © an idea of the waste treatment method ?

I guess the flow chart will somewhat depend on the specific product . There is one example of a HACCP flow chart for toffee ice-cream on this forum but no detail regarding waste flows so I guess not so interesting. Similarly hv not seen any detailed mass balances anywhere unfortunately.

However I found this summary of one ice-cream / waste scenario -

Waste Reduction & Recycling
Ben & Jerry’s Waste Reduction Efforts — Manufacturing Product Waste (“High Strength Dairy Waste”)
There is always product waste associated with the Company’s manufacturing processes. This waste contains sugar, cream, eggs, flavorings and add-in ingredients, all mixed with water. Waste product occurs in a variety of ways:

* Through the cleaning process associated with flavor changes on production lines.
* At the start/stop of production runs.
* When formulation errors occur.
* From spillage on the factory floor.
* As a result of testing new flavors or equipment.

This particular product waste, otherwise known as High Strength Dairy Waste (HSDW), represents one of the Company’s greatest environmental impacts. Ice cream ingredients contain high levels of sugar and fat which, without proper management at a wastewater treatment facility, can impact aquatic environments. Under strict regulatory permits, both manufacturing sites discharge to a municipal pretreatment system. In addition, the Waterbury Plant has its own pretreatment system through which production wastewater is treated prior to discharge to the municipal system. The treatment plant uses a dissolved air flotation (DAF) unit and aerobic lagoons to treat the waste to regulated discharge levels.

Despite our efforts to keep the ingredients flowing into the production system and not into the waste system, dairy waste is still generated. The waste is managed through two options:

* It is shipped to a permitted composting facility to be turned into fertilizer for landscaping, farms and home gardens.
* It is placed in permitted manure pits for use as fertilizer.

The high strength dairy waste that we compost is sent the Intervale Compost Project, run by the nonprofit Intervale Foundation. Once the material is composted it is used as fertilizer by local nurseries, individuals, or the Intervale Foundation’s farmer program.

http://www.benjerry....us/environment/

Similarly I found this Google info from a book on food processing (Shelley, Patiyath et al) -
(I guess there may be some overlap with Hongyun's input here but the topic is a bit over my head so sorry if duplication)

 ice_cream_waste.jpg   60.78KB   68 downloads

Anyway, maybe of some interest and perhaps there are other specialists here who can offer more ???

Rgds / Charles.C

added, I know this is probably not yr immediate interest but here's one more (1995) ref for treatment of ice-cream waste -

 ice_cream_wastewater_digestion.pdf   368.38KB   137 downloads

[gkselas]

WoW!! too many information!!
God, thanks you all are very helpful!

Charles, the idea of the HACCP plan is very good..i never thought of it (!!).And i think i'll use it!The .pdf file u sent me some things already put them in my prodject..

Im trying to show u excactly what i want to put in my prodject and i hope u understand me..
Thank you too Charles!