Sains Malaysiana 33(1): 167-180 (2004)                                                      Sains Fizis dan Gunaan /

Physical and Applied Sciences

 

Kesan Luahan Kumbahan Domestik ke atas Sungai

dan Perairan Pantai di Malaysia

(Effect of dischage of domestic sewerage to rivers

and coastal waters of Malaysia)

 

Lee Yook Heng, Zuriati Zakaria, Zanal Mohd Zain, Hazimin Harun,

Farrah Anis Fazliatul Adnan, Suhaida Mohd Redzuan

Pusat Pengajian Sains Kimia & Teknologi Makanan

Fakulti Sains & Teknologi, Universiti Kebangsaan Malaysia

43600 UKM Bangi, Selangor D.E., Malaysia

 

 

 

ABSTRAK

 

Kajian ke atas luahan kumbahan domestik ke atas sistem sungai dan perairan pantai telah dilakukan di Kajang (Sg Jeluh dan Langat) dan di Pantai Negeri Sembilan (Port Dickson dan Pantai Tanjung Biru). Parameter kajian tertumpu kepada ciri-ciri utama kumbahan domestik seperti kandungan organik (permintaan oksigen biokimia, BOD dan paras nutrien (fosfat terlarut (PO4) dan nitrat (NO)). Perlepasan kumbahan domestik daripada kolam pengoksidaan di sekitar bandar Kajang telah menyebabkan paras BOD dan PO4 yang tinggi iaitu 1.9-5.1 dan 0.15-2.03 mg/L masing-masing. Peningkatan BOD berkorelasi (r=0.77) dengan penurunan paras oksigen terlarut (DO) dalam air sungai. Pada keseluruhannya kesan kumbahan domestik ke atas Sg. Jeluh dan Langat adalah lebih ketara berbanding dengan yang dialami oleh air marin di persisiran pantai.

 

 

ABSTRACT

 

An investigation of the effect of discharge of domestic sewage to rivers at Kajang (Jeluh and Langat River) and coastal waters at Negeri Sembilan (Port Dickson and Blue Lagoon) was carried out. The parameters studied focused on the characteristics of sewage such as organic content (biochemi­cal oxygen demand, BOD and nutrients (dissolved phosphate, (PO4) and nitrate (NO)). The discharge of domestic sewage from oxidation ponds near Kajang has resulted in high levels of BOD and PO4 in river water, i.e. 1.9-5.1 and 0.15-2.03 mg/L respectively. The increase in BOD is correlated (r =0.77) with the decrease in the level of dissolved oxygen (DO) in the river water. In general. the effects of domestic sewage discharge on water quality is more obvious in the Jeluh and Langat rivers at Kajang when compared to the effect on marine water.

 

 

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