Hello,
So for my work I design plumbing systems. We have a school on septics which were installed many years ago. The installation is old and the amount of students at the school has increased.
A geo-technical report has concluded that the school site is no longer suitable for septics - due to the size of the school and changes to code since the original installation.
The closest sewer manhole is 2.2km away, and the cost of pumping the sewer via a pumping station is approximately 2 million.
I have been able to locate a company which can process the sewer onsite, using a more modern process, but it will still require some waste water to be filtered into a grass mound. The plant which has been proposed to us, will convert the sewer waste after several stages into, "Class A Irrigation Water". I was surprised at the price by the company proposing this to us, and would like to investigate further the possibility of distilling the Class A irrigation water, and then disposing of it directly into a stormwater drain. The local council & EPA (Environmental protection agency) surely could have no objection to distilled water being discharged direct to stormwater.
I am due to finalize my feasibility study/recommendations to the school mid this coming week, so this is something I can focus on and spend some time on during work hours. My question is - can someone please recommend a commercial plant which could process this water by distillation?
The school produces 5900 liters of waste water per day. The system we are currently proposing which will convert this into Class A irrigation Water, will be designed to handle approximately 8000 liters/day.
We calculate this to be produced during an 8 hour period, and so this translates to a system which can distill approximately 16.5 litres of water per minute for 8 hours; or 990 liters per hour. Alternatively we could control the flow of water to be distilled to be as little as 5.5 litres per hour - if the machine ran non stop.
I'm aware that we should be able to dispose of Class A irrigation water direct down the stormwater drain anyway, however for absolute peace of mind for the school, and for our company who will be signing off on the installation, the idea that the waste water is distilled prior to disposal I think is the ultimate solution.
We would want a device (or a couple of devices in tandem), that can be set to run automatically within a purpose built shed, with virtually no human operating other than regular maintenance by groundsmen with minimal training. All the primary septics systems and pumping station operate fully automatically with no human operators. Is there a system or a company who could handle this sort of thing? There are larger companies that deal in this level of water purification, but they all require that the system is treating a minimum of 20,000 liters/day - hence most sewerage treatment plants aren't suitable for this. I'm just trying to see if there is a company which sells or specializes in commercial distilling of water, to the tune of approx 8000 liters / day?
Thanks for your time - apologies if I'm not really on the right forum.