Appendix

I

Case Study – Lankayan Island Dive Resort

Project Project Duration: Sept 2010 – Dec 2010

Tomher Environmental Sdn Bhd has been appointed as the system designer and installer mid 2010 to solve the sewage disposal problem which has long plagued the island since its establishment. The entire project took 6 months from the initial site survey to the final commissioning/ observation of the system. However, the actual fabrication & installation took merely 2.5 months to complete. Prior to the adoption of Tomher “Infinity BioSolv” system, there had been various systems being installed/ modified but with little success. The diagram below shows the history of the systems that were previously installed and used until Infinity BioSolv has been adopted. The exact time of the installation for other systems installed is unknown but the chronological order is illustrated.

Timeline

Failed Malaysian

Effluent Standard B

Failed Malaysian Effluent

Standard B

Failed Malaysian

Effluent Standard B

Achieved Malaysian Effluent Standard A

Septic system is designed to only achieve Effluent

standard B at most.

Septic system is designed to only achieve

Effluent standard B at most.

Hydroponics is NOT

wastewater treatment system. It is only a polishing system. Achieve the same

effluent standard B

Achieved lower BOD

and SS than Malaysian Effluent Standard A.

Chemsains report: BOD: 5.82 mg/L

SS: 16 mg/L

NOT suitable for environmentally

sensitive areas such as islands, riverside,

shoreline establishment

The use of ozone

generator in septic tank is a Big NO NO. Ozone kills off the anaerobic bacteria needed for

digestion

Hydroponics is a good

secondary add-on if the right primary

wastewater treatment system is adopted

Very suitable for environmentally

sensitive areas and urban development

Prone to create

sewage pollution if not regularly desludged

Effluent quality

worsened & caused more severe sewage

pollution

Sewage pollution

remains

Compliance to DOE

requirements & beyond

Service Terminated

Service Terminated

Maintained but only as secondary treatment

after “Infinity BioSolv” system

Fully In Operation

Concrete Septic Tank

Concrete Septic Tank With Ozone Added in the septic tank

Ozone

Hydroponics (HTS)

Infinity BioSolv system

Enhanced Extended Aeration

(Biological Treatment

Plant)

In our initial site survey and study, we have found that the previous systems installed were not designed for application at areas which are environmentally sensitive especially where it comes in contact with the water source nearby. Septic tank is designed to only achieve Malaysian Effluent Standard B which is BOD: 50mg/L and SS: 100mg/L and is not capable of constantly maintaining at this level due to the accumulation of sludge in the system over time. Unless regular desludge of every 9 months is carried out, septic system is absolutely NOT suitable for this application. It is not a surprise that the previous systems installed were unable to meet the effluent requirement as the wrong primary treatment system was being applied. The solution is very simple! It is the matter of applying the correct and suitable Primary Treatment system. The primary treatment system must be capable of achieving Malaysian Effluent Standard A (BOD: 20mg/L and SS: 50mg/L) regardless of whether a secondary and/or tertiary treatment system is being used. It is important to point out that such system has to be an automated system where desludging can be carried out without the need of special desludging equipment which is often very complicated when the location is either remote or hard to access. In order to cause the least disruption to the normal operation of the resort, a complementing solution was mapped out to discard the problematic septic system, and Tomher “Infinity BioSolv” primary treatment system was installed as the ultimate replacement.

Before

Ground

Level

Concrete Septic Tank

Influent from Washrooms

Hydroponics (HTS)

Effluent to ground/ watersource

Influent from Washrooms

Balancing Tank

Hydroponics (HTS)

Infinity BioSolv system

Effluent to ground/ watersource

Ground

Level

After

Often than not, the existing septic tank can be converted into a balancing sump to balance out the diurnal effect of the influent from the facility. In the case of Lankayan project, a new balancing sump has to be constructed as the existing septic tank is found to be not suitable. Tomher “Infinity BioSolv” primary treatment system is then being installed before the hydroponic (HTS) system. The hydroponic system is maintained merely as a secondary treatment system which functioned as a polishing system and a green initiative to make use of the nutrients left in the effluent for growing crops.

Fully Installed and Operational – “Infinity BioSolv” primary treatment system

Existing Septic Tank chambers can be converted into

balancing sump

Level Float Switch to control the pumping rate of sewage into system. Submersible pumps designed to run in alternate loop

Control Panel Room

Hydroponics (HTS) system

b

Top left: Drying Beds; Top right: Sludge distribution lines in drying beds Bottom: Dried Sludge to be used as organic fertilizers

Cited the similarities in the existing system at Sipadan island and the previous system at Lankayan island, we are confident that our Infinity BioSolv system is the solution to solve the effluent quality issue for Sabah Park. Attached is also the effluent test report done by Chemsains Konsultant Sdn Bhd 15

th April

2011 after the system has been in operation for more than 4 months. The result from the test report has shown that the effluent quality is well below the BOD and SS limit set for Malaysian Effluent Standard A which is BOD: 20mg/L and SS: 50mg/L