1st Loading with Cow Dung

  

14th July 2010~

ah.. loaded the shit today.. first load..

no pics cos....it was rather messy.. x=

diluted the shit to 12% but it was rather..watery.. lol..

well.. it's in.. waiting for another month or so for the final result~~

cheers ppl!!!

  

Prototype Transportation to SVF

  

13 July 2010

transported prototype to the farm today!!

placed it in front of the big digester and the previous prototype cos it couldnt stand by itself..

heh.. Uncle Chris said tt if there's rain, it'll be gone.. o.=

ah well.. loading tml i guess..

dios~

  

Prototype Near Completion

  

9th July 2010

Today is a special day~~

we managed to connect everything together today!! sure, some parts aren't ready and taped together ( Anaerobic to aerobic, Anaerobic to scrubber, scrubber to capture).. it's all for easy transportation later..

but at last!! we just need a day for final adjustment, then we can finally start operation!! just have to wait for the photos from Jian Wei~~

:D

Adios amigo~~ we're almost there!!

 

More Tools Bought

 

8th July 2010

Bought the following today:

• contact glue (for joints)
• cloth tape for insulation

well.. that's all because we ended late~~

adios amigo

  

At Sun Hee, the Ultimate Store!

7th July 2010

So we went down to Sun Hee Hardware at Clementi (behind the mosque).. and bought the following:

• 3/4" PVC pipes for scrubber to capture
• 1/2" stainless steel pipe for capture to user
• Vents for all tanks
• necessary elbows and fittings

but we've spent about 3 hours finding all the necessary components..

and we've hit out $570.60 mark for expenditure already.... LOL.. poor Mr Kon..

Adios amigo~

  

More Hands-on Work

  

6th July 2010

back to Tuas againnnn...

Things completed today:

• Fixed PVC part of scrubber
• Cut all pipes to size
• Redrilled scrubber
• Resealed connectors

Marcus and Kian How working on the resealing..

previously, PVC gel was only placed on the outside of the tank connectors.. but we were advised that it will not create a leak-proof situation.. therefore, sealant is now placed between the drum and rubber and well as between rubber and tank connector..

Brenda's sizing pipe down..

as observed here, the pipe sizes came in 2.9m length. therefore, it is necessary to size down all the pipes to dimensions which we need..

adios amigo~~

 

More Purchasing Work

  

5th July 2010

more purchasing to be done!!!

we've more or less purchased everything already.. like, additional tank connectors or such which we'll need..

we've also settled our capture (initial idea was a piston, then changed to a plastic container[cookie type?] about last week or something, then now changed to just a simple swimming float)..

however, we've yet to settle our racks and from capture to users part as well as scrubber to capture part!!

oh yeah.. we've also removed the flowmeters as it wouldnt register much.. also have abandoned the turbine flow meter for now as it's for large flow and is far too expensive.. impractical for this prototype..

We've also removed the checkvalve between the digester and scrubber ( it would create too much additional pressure drop and is generally pointless).

so.. major changes are:

• removal of checkvalve between scrubber and digester
• change of capture from piston to container to float
• removal of flowmeter

more work to do!!!!

adios amigo~

  

Prototype Construction at Tuas

 
2nd July 2010

yawns, back at Tuas now..

today, we're focusing on sealing all the tank connectors to the three drums (anaerobic, aerobic and scrubber). meanwhile, we've also came up with a simplified stirrer idea.

Tank connectors purchased from LNK Trading previously is used instead of the previous valve rings obtained from Ensure. from left to right, 2", 1", 3/4".. tank connectors are used instead of valve rings. as it have protruding parts on both ends, it means that the tanks will never be fully empty (a safety device?)

Scrubber top.. three holes are: gas inlet (1"), gas outlet (1"), water inlet (1").. on the bottom of the drum is water outlet.. we've sealed the 1" tank connectors using PVC gel.

Aerobic top.. the three holes are: loading from Anaerobic stage (2"), vent (3/4" with threading on top), hand pump for oxygen (3/4" without threading)

Anaerobic top.. starting from the loading port (2"), gas outlet (1"), pressure gauge (3/4" threading), vent (3/4"), heater (1/2" without tank connector)

Stirrer Idea.. inserting a bearing into the tank connector then insert a rod into that.. we'll then add props at the other end of the rod to form a propeller type stirrer.. Marcus's idea

Stirrer Idea (prototype)... on the top right hand side, you can see the rod sticking out.. then you can see the bearing at the top.. it's all connected to the 3/4" valve ring but cant fit properly as the bearing is too big..

well.. so we've sealed everything but aint proud of my sealing work there.. at least Marcus have settled the stirrer idea.. and where's Kian How?? still stuck in class.. LOL...

adios amigo~~~ =)

  

Purchase of Fittings

  

1st July 2010

first day of the month!!!

we've went to buy more tank connectors as well as pipes (2" x 5.8m, 1" x 5.8m) from LNK as we've realised that we dont have enough.. we only have 3 x 2" tank connectors from Duran of Ensure.. and we needed 4 of that plus many many 1" and 3/4" and 1/2" ones..

also, we've gotten 2 pressure gauges from Teck Siong Huat Harware PTE LTD (recommended) for the anaerobic and aerobic stage of the digester..

we also discussed about the stirrer type and sizing.. so we're thinking of a screw type stirrer and asking Mr Koh Chuan Aik for help on that matter..

adios amigo~~ heh

  

Meeting in W314

30 June 2010 (from 1300 to 1550)

today, we're here once again..

we're collating the things that we needa buy..

currently, we need the following:

• checkvalve 1" x 2 (biogas, spring or non spring?, 1", UPVC/PVC)
  
• Pressure Indicator x 2 (3/4", >3bar, face size:2")
  
• valve rings (2" x 6, 1" x 8, 1/2" x 4, 3/4" x 4: UPVC/PVC)
• flowmeter x 2 (for biogas, slow flow, 1", atmospheric pressure)

and so, we start our calling of contractors to ABB (valves/fittings), Bourdon Sedeme (pressure, temp, force, acceleration measurement) and Flotech Controls PTE LTD (flow indicator).

well.. no one's replying us now.. but we're looking at Festo for valves and fittings as well as Lee Hung for flowmeters.. hmmmm..

and and.. the company Bourdon Sedeme doesnt exist at all!!!!

oh well.. time to go home now~~~

adios amigo!!!