Abstract
The quality of Klang river water is deteriorating dramatically since it is in urban places every day and become one of the major problems. Therefore, the Malaysian government had initiated one river cleaning project named River of Life (ROL) project. This project is for rehabilitating and restoring the Klang river. A series of river water treatment plant (RWTP)s have been operated in Klang river catchment since 2014. Six RWTPs station has been monitored up to eight stations until presents. Eight parameters consisting of physio-chemical types and biological types have been recorded. RWTP effluent discharges are targeted to achieve Malaysia Interim National Water Quality Standard (INWQS) under Class II B. Since previous RWTP performance only emphasized on local river pollutants and certain conditions, this paper will investigate the effectiveness of full-scale RWTP unit process for river condition. Water quality assessment are involved which are consist of effluent water quality monitoring and pollutant removal efficiency. Most of the major pollutants able to be reduced by more than 50% reduction. Although BOD and AN still not able to achieve standard range gazetted by INWQS Class IIB, there is an improvement of river water quality at Klang River by using IFAS technology adopted in the RWTP system.
Highlights
In the last few decades river management and restoration play an important role in the environment
The effluent Chemical Oxygen Demand (COD) for most of the month is according to the standard range gazette by Interim National Wat er Quality Standard (INWQS) Class IIB (Fig 4) which is permitted to be within COD 10-205 mg/L[20]
This is due to Integrated Fixed Activated Sludge System (IFAS) system are consider as hybrid performance which are consist of suspended and attached growth system.[26], [27] Multiple previous studies have been conducted for nitrification process for removal Ammonia Nitrogen (AN) and its group substances; Nitrite and Nitrate.[28]
Summary
In the last few decades river management and restoration play an important role in the environment. In the fields of research a major area is improving the water quality of the river [4], [5]. The quality of Klang river water is deteriorating intensely since it is in urban places and become one of the major problems. The causes are both natural (e.g. changes in precipitation; flood; erosion;) and anthropogenic (e.g. urban, industrial and human activities) reasons for this problem. Continuous urban river pollution issues in Malaysia have urged more studies to be conducted to get intuition into new technologies approaches especially on RWTP. This research work is implemented to investigate the effectiveness of unit processes combined in full-scale RWTP for Klang river condition
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