Readings:

Time: 0830
Inside Temp: 53 deg F / 12 deg C
Outside Temp: 41 deg F / 5 deg C
Relative Humidity: 65%

Time: 1300
Inside Temp: 78 deg F / 26 deg C
Outside Temp: 51 deg F / 11 deg C
Relative Humidity: 64%

Time: 1800
Inside Temp: 69 deg F / 21 deg C
Outside Temp: 51 deg F / 11 deg C
Relative Humidity: 61%

Minimum Temp: 54 deg F / 12 deg C
Maximum Temp: 75 deg F / 24 deg C
(Note: Temperature readings were taken in Fahrenheit; Max/min T were taken inside porthole at bottom of Hab ladder)

Normal chores in the GreenHab were performed on each of these occasions.

• Both aerators are working, one is in Tank #2 and one in Tank #4.
• Only air bubbles in Tank #2 & 4
• All plants were sprayed with water and fed. Currently the carrots are growing, and some radishes have sprouted in the last 2 days.
• The sump pump is connected to a timer which activates the system at 12:00 hours and 00:00 hours.
• The plants in the buckets appeared to have died only a layer of black goo remains.
• The plants in Tank #4 look like they are doing well.
• Water in tank #5 is running normally.
• Turned on recycle pump for 15 minutes to a 1/2hr to remove algae from the top of Tank One.
• The TST tank is still being filled as required by the pump.
• TST water filter flowrate is still acceptable.

Additional Chores:

• Clearing algae from the system.
  Previous Action: Cleaned and reinnoculated Trickling Filter 2 from the 100 gallon grey water tank. The translucent trickling filter reservoir tanks were wrapped with black plastic to cut out the light. The first four tanks were scraped to remove algae, and the rear section covered of the first four tanks with green plastic (our punctured air mattress/couch) to impede further growth.
  Suggested Daily Additional Chore: Turn on recycle pump for 15 minutes to a 1/2hr to remove algae from the top of Tank One.
• Nitrification/Denitrification Experiment.
  Operation State: 6hr ON/OFF cycles with a stir bar providing aeration.
  Day 0: Soapy water (1g/l concentration of soap) in a 2L beaker with 1700ml of water was inoculated with 25 ml of concentrated solids from the underground grey water tank. Soapy water of this concentration was shown to have: pH of 7.8; NH3 3 mg/L, NO2 0mg/L, NO3 10mg/L.
  Day 2: Took readings: pH 7.8, NH3 0.25 mg/L, NO2 0mg/L, NO3 0mg/L. Added 2.4 g of Oasis soap/ 1600ml which is ~ NH3 4.5 mg/L, NO2 0mg/L, NO3 15 mg/L. Nitrification/denitrification appears to be occurring; however, a control will be started to verify this.
  
  
• TST work - Float Switch
  Results: The existing fluid level sensor or high level alarm does not turn off the power to the TST fill pump when actuated. It is not easy to disassemble or troubleshoot, because it was placed in with RTV or aquarium sealant.
  Action: Install a new float switch per instructions. It turns out that we had located an AC float switch the other day, so we still need to find a DC float switch.

Evaporation Test:

Evaporation test begun yesterday to document water loss from the treatment tanks as part of the grey water system balance. I used a 2000 ml Pyrex beaker with a 4.75 inch diameter.

Beaker Surface Area: 11.04 sq inch
03/31/04 15:32 1400 ml
04/01/04 15:30 1350 ml
04/03/04 06:00 1300 ml (rainy day)
04.04.04 12:00 1250 ml
04.05.04 15:00 1200 ml

Tank Surface Area: 1057.5 sq inch per tank
Estimated water loss per Tank: 4789 ml / day
Estimated water loss for 5 Tanks: ~24L /day (~6.34 G/day)

Open Issues:

• "Hab Power" in the GreenHab:
  Status: Hab Power is from the solar panel pod. The SOLAR PANEL setting is actually from the 12 VDC power supply under the TST.
  Action: These will be returned to their original labeling in the coming days.
  
  
• Electrical Diagram of the Greenhab
  Status: We have finished mapped the wiring of the GreenHab to 99% of the system. We are still updating the electrical flow diagram in Power Point. This file will be uploaded to our Crew 27 directory along with other relevant procedures in the coming days
  Proposed Action: Finish mapping the GreenHab in the coming days.
  
  
• Tacking down loose wires
  Proposed Action: will be done in the coming days.
  
  
• The Southern louvers need to open more for proper ventilation.
  Status: 5 solar panels are connected to the solar pod and routed to the GreenHab fuse box for use by the DC devices, including the Southern Fan.
  Question: Should I add the working solar panel that is just resting unconnected in the Northern Hab to this sytem.
  
  
• Yellow Laptop as part of HOBO logger system
  Open Issue The yellow laptop hab computer has some port malfunction which is preventing the HOBO download.
  
  
• Treatment system appears not to be removing nitrate.
  Actions Reinnoculated trickling filter #2
  Further Action: Add water hyacinths when they arrive.
  
  
• Temperature readings from Oregon Scientific
  Observation: It records Temp and RH from 2 channels. Channel 0 is from the base unit in the upper Hab level. Channel 1 receiver is located outside of the rear airlock on the strut to the left.
  Action: Examine readings to see if the readings are correct.