Discussion Diagrams: Wastes Processing & Management

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DISCUSSION AND DIAGRAMS

Wastes Processing and Management for Remote Sites
for Sewage, Grey Water and Solids

Dr. Michael C. Clarke,
Managing Director, M.E.T.T.S. Pty. Ltd.

WASTE STREAMS

· SEWAGE ('BLACK WATER') AND, BATHROOM AND INFIRMARY SOLIDS

· KITCHEN WASTES, SOLIDS, 'GREY WATER' AND, OIL AND GREASE

· BATHROOM AND LAUNDRY GREY WATER

· GARDEN SOLIDS, ROADWAY RUN-OFF WATER, SWIMMING POOL DISCHARGE

PROPOSAL AIM AND SCOPE

M.E.T.T.S. can provide hotel and resort operators with complete, integrated and economical

waste management schemes, that are almost totally self-sufficient, and require a minimum of external

management, materials supply and residuals removal. The concepts of biological neutralisation, recycling,

energy recovery and the maintenance of site ambience are included in the planning of any waste management

scheme. The aim of this proposal is thus to provide an environmentally benign but complete waste management

system. The scope of the proposal is to provide a waste management that will encompass the processing of all

of the above waste streams.

(1) Liquid wastes. The separation of sewage (black water) from kitchen and bathroom grey water

should be considered in any wastes management plan. The reduction in volume for 'full treatment'

by the sewage plant will provide capital and operating savings in sewage treatment.

(2) Grease traps. The removal of grease and oils before sewage treatment is standard practice. The

process can be enhanced by the application of grease eating bacteria to the waste stream. Grease

from the traps can be burnt in the incinerator, if bacterial oxidation is not utilised.

(3) Odour control. Odour control can be achieved by four means. These are, biological control using

packed beds, ozonation, incineration (combustion of odorous emissions) and dispersion. Depending

on the physical circumstances, any one of those methods could be employed.

(4) Water dosing. Depending on the intended uses, dosing of the reservoir water will be undertaken

to ensure water quality. It would be possible to produce water of potable quality by installing a

stringent dosing and filtration regime.

(5) Cooking oil. Depending on the cooking styles, the size of the kitchens and kitchen practice,

cooking oil can be a minor or major problem. Incineration, biological oxidation and landfill are all

disposal options.