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Major constraints to wastewater treatment faced in Malaysia (Canning…
Major constraints to wastewater treatment faced in Malaysia
Non-compliance or mediocre compliance are mainly caused by high influent of oil & grease (O&G) discharged into STPs serving industrial, commercial areas & food related business premises that do not have grease traps or do not maintain grease traps adequately.
Other contributory factors are excessive discharge of soaps, detergents & other cleaning agents into sewerage system
At the present scenario, low sewerage tariff is unable to support the high operation and maintenance costs
Sewerage services collection by operators is not conducive as it is unfortunate that many Malaysians fail to realize the importance of sewage management with regards to a safer environment.
To curb this government has initiated proposal to introduce joint billing for water supply & sewerage services
The dynamics of the sewerage industry where sewerage infrastructures are constructed by private developers & handed over to the public operator (for operations and maintenance) opens up the risk factor of quality being compromised, which would subsequently have impact on the treatment processes and operations
Blue water = good quality water
Water hyacinth in lakes and rivers due to high nutrients
Algal bloom – sign of eutrophication
Brown water comes from swamps & forests
Weed infestation of water bodies is driven by nutrient enrichment
Green water = nutrient-enriched water
Canning
Trimming, culling juicing, blanching of fruits & vegetables
High suspended solid, colloidal & DOM
Meat & Poultry
High suspended & dissolved
organic matter, fats, blood & other protein
pens; slaughtering; bone & fats rendering
condensate residue; grease & wash water; chicken picking
Bakery
Washing and greasing of pans
& floor washing
High grease, BOD, sugar, flour &
detergents
Dairy
whole milk dilution, separated milk, butter milk & whey
High dissolved organic matter:
mainly protein, fat & lactose
Fish
pressed fish, evaporator & wash water & centrifuge rejects
Odour, High BOD & total organic
solid
Brewery & beverages
steeping & pressing of grain;
alcohol distillation residue, stillage evaporation, condensate
High in dissolved organic solid rich in Nitrogen & fermented starch