Sunday, November 14, 2010

grey water treatment

The treatment system consists of several units:
† Fine screen (FS) – Removes gross solids, hair, etc. 1mm square shaped mesh.
† Equalisation basin (EB) – Regulates between raw greywater inflows and outflows to
the treatment system, and equalises the quality and temperature of the raw greywater.
The volume of the EB is 330 l, with a maximum residence time of 10 hours (the EB
feeds other systems too).
† Rotating biological contactor (RBC) – Attached growth biological treatment unit of
low energy consumption. The RBC consists of two basins in series. The volume of each
basin is 15 l, it is equipped with a horizontal axis which carries circular discs of 0.22m
diameter and total surface area of 1m2. The flow is perpendicular to the axis. Rotational
speed of the discs is 13 rpm which corresponds to a linear velocity of 9 m/min (comparable
with rotational speed of 1–1.5 rpm in a full scale RBC of 2–3m diameter). Feed
discharge is 7.5 l/hr, thus the mean residence time (MRT) in each basin is 2 hours.
† Sedimentation basin (SB) – The sedimentation basin is attached to the second RBC.
Its volume is 7.5 l, thus its MRT is 1 hour. Sludge is removed manually (in order to
study its production rate).
† Pre-filtration storage tank (PFST) – The storage tank is needed to regulate between
SB effluent flow (continuous) and the SF (see below) flow (intermittent). The maximum
residence time is about 2.2 hours. The tank is covered to eliminate flies and
mosquitoes problems.
† Sand filtration (SF) – Gravity filter of 10 cm diameter and 70 cm media depth. The
medium consists of quartz sand size 0 (d10 0.63 mm, d60 0.78 mm, uniformity coefficient
1.24, porosity 0.36). The filter medium is supported by 5 cm of gravel (diameter
2.2 mm). The filter is operated intermittently 11 times a day, 15 minutes each time.
The filter discharge is 65 l/h. which corresponds to filtration velocity (hydraulic load)
of 8.33 m/h. The filter is backwashed once a week (once every 77 filtration cycles –
1,260 l filtered).
† Disinfection – Disinfection was carried out by chlorination (hypochlorite 0.2–0.25%)
in a batch mode. Chlorine dose was calculated by chlorine demand and a requirement
for 1 mg/l residual chlorine after 30 minutes, contact time.

http://gwri-ic.technion.ac.il/pdf/Professors/Noah_Galil/3.pdf

http://www.greywater.com/

http://www.ozzikleen.com/announcements/ozzi-kleen-greywater-recycling-system

Our passive graywater irrigation kits make watering your greenhouse, orchard, or planterbeds a breeze. Graywater from your home is piped directly to this extremely durable, buried vault where solid debris (lint, hair, and dirt) settles to the bottom and grease floats to the top. Yes, Grease and Fats ... some of the most popular "natural" bar soaps are 99.9% refined chicken fat. That's why you must have a settling tank or your leach field will eventually clog and fail. As greywater flows in, clarified graywater irrigation flows out. Our graywater irrigation kit works without any "moving parts". All of the fittings required to install your greywater filter/settling basin are included*: tank with lid, rubber grommets for inlet and outlet pipes, neoprene lid gasket, and tamper resistant fasteners. Replacement and/or additional fittings are common four inch diameter sewer pipe available at your local plumbing or building supply store. *You provide the straight (perforated and/or solid) sewer pipe from house to tank and from tank into leach field.

http://www.thenaturalhome.com/greywaterdrywell.htm

Tuesday, October 12, 2010

One more idea

This is very rough design of another idea I had for the poster.

Wednesday, October 6, 2010

The posters with edited copy





I might rethink about the emphasis of the words and the placement of them.

I am not sure about this one and I have to change the colors to the color Misha chose.

Tuesday, September 21, 2010

Poster design

I am still working on the posters, but these are what I have so far.


Thursday, September 9, 2010

New sketches

I roughly sketched some of the ideas I had, in Illustrator.
The typeface, color, and images are not my final choices. The copy also is not the one that I want to use. I just wanted to see how the posters look like with those elements.

In the following poster, the type would be on the left side.