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SOLID WASTE MANAGEMENT CEEB433

SITE VISIT REPORT AT BUKIT TAGAR SANITARY LANDFILL

ELFFIE BIN YUNUS CE090607

MOHAMAD AZRUL FAIZAL BIN MOHAMAD RAZALI CE090852

LECTURE: DR.GASIM

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TABLE OF CONTENTS

INTRODUCTION………………………………………………………...1

OBJECTIVE OF THE VISIT …………………..……………..……………………..……...1

LOCATION OF SITE...............................................................……………1

DESIGN AND FACILITIES………………………………………………………………...5

THE WASTE PROCESS IN BTSL ………………………………………….10

APPENDIX…………………………………………………………………………………..12

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INTRODUCTION

A site visit for the solid management engineering class was organized by Dr Gasim on 4 August 2015. The location of the site visit was at Bukit Tagar Hulu Selangor. A total of approximately 30 students attended the site visit. The agenda of the visit consist of some briefing on presentation given by the person in charge. At the end of the briefing, there was a questioning and answering session between the student and the host. Countless valuable information was shared among both parties regarding the visit especially on the operation of the project.

OBJECTIVE OF THE VISIT

The purpose of this site visit is to provide the students with some knowledge and ideas on how the sanitary landfill being handled. The understanding of sanitary landfill would be good basis for student in order to practice in future. Besides the awareness on how important the management of solid waste can be increase and this site visit can assist the students on knowledge for the preparation of their future career.

LOCATION OF SITE

The Bukit Tagar landfill is situated on parts of Lots 25, 36 and 37 of Ladang Sg Tinggi in Mukin Sg Tinggi, Daerah Hulu Selangor. The landfill is approximately 50 km north of Kuala Lumpur and it is a developed on 700 acres land area with 1000 acres of buffer zone. The location also surrounded by palm plantation. It is a sanitary landfill and it started operation in 2007. The development of Bukit Tagar technically to overcome the problem associated with the closure of existing landfills at Taman Beringin in Kepong and Air Hitam in Puchong.

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DESIGN AND FACILITIES

BTSL is the premier sanitary landfill in Malaysia which developed by KUB- Berjaya Enviro Sdn Bhd and under supervision from the Ministry of Urban Welbeing, Housing and Local Government where it provide safe, efficient and environmental friendly solid waste management solution. It is designed as a fully engineered level IV landfill which provide maximum protection to the environment, with full high density polyethylene (HDPE) membrane liner, leachate collection and leachate treatment system which fully automated by SCADA system.

The facilities that BTSL has are:

a. landfill with full HDPE membrane liner, b. leachate collection and treatment facilities and c. Comprehensive landfill gas management system.

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LANDFILL SCHEMATIC DESIGN

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HDPE MEMBRANE LINER

HDPE is the most widely used geomembrane in the world and is used more commonly internationally due to its availability and relatively inexpensive material cost. It is also broad chemical resistance, its high strength, its relative inherent flexibility achieved without additives, its weathering resistance that allows it to be left uncovered, and its ability to be integrally fusion-welded by thermal methods rather than by using solvents and adhesives. HDPE is needed over the landfill to keep water out (to prevent leachate formation). If the cover liner is not maintained, rain will enter the landfill resulting in buildup of leachate to the point where the bathtub overflows its sides and wastes enter the environment.

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LANDFILL AREA

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LEACHATE TREATMENT

The leachate in BTSL is fully automated by SCADA system which control all the pumps and valves to enable the plant to operate automatically. The leachate treatment plant comprised 4 sequential batch reactor (SBR) lagoons, 24 aerators, chemical storage and dosing system, balancing tanks, sludge thickener and dissolved air floatation (DOF) plant.

The leachate is intercepted by the base liner system and conveyed through drainage pipes to the leachate treatment plant (LTP). When the leachate reach the LTP, the LTP will employs aerobic and anaerobic biological processes and it will also undergo the flocculation and dissolved air flotation process. These processes are important to break down pollutants in the leachate to harmless component within a 24 hour cycle. After the process complete then the treated effluent is further processed in the reed bed which consists of Phragmites plant capable of absorbing residues in the treated leachate to improve its quality. Final treated effluent achieving the DOE, standards are not discharged into water courses, but are irrigated in designated zones to be absorbed by vegetation through evapo-transpiration to achieve zero-discharge policy.

BTSL needs to treat the leachate properly because they are using it back as a water supply. They have successfully treated the leachate until it reaches the grade B for water drinking standard. Amazingly their Landfill in China, the leachate treated until it reach grade A of water drinking standard.

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LEACHATE TANK

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GAS MANAGEMENT SYSTEM

In BTSL, besides processing the solid waste, a comprehensive landfill gas management system is in place. This system is dealing with landfill gas, including methane, which is by product of the decomposition of organic matter. BTSL uses the methane gas to produce electricity to supply electric in BTSL.

The methane gas was channel as a fuel to power the 4.4MW gas engines to generate electricity taken up by the national grid through TNB under the Feed in Tariff scheme. Besides Bukit Tagar also optimizing land use by establishing pilot solar farm project where in future there will be demand for power.

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THE WASTE PROCESS IN BTSL

The waste has enter into BTSL will be processed very systematic and detail. Municipal waste arriving in haulage trucks are weigh at electronic weigh bridge first before that waste will be discharging at designated tipping areas in active at phase 2 and phase 3. At site, bulldozer and compactor spread and compact the waste in layer by layer and at the end of process, they will make daily cover for that active cell by using plastic and clay because they want to avoid the oxygen and the rain enter that cell.

The gas is produced by the waste will go out by gas vents and pipes are constructed contemporaneously within the waste layer capture and channel landfill gas. The storm water interception system diverts and drains storm water into silts traps and dentations ponds for discharge. The liquid or leachate come out from the waste is intercepted by the base liner system and conveyed through drainage pipes to leachate treatment plant (LPT).

The LTP employs aerobic and anaerobic biological process, flocculation and dissolved air floating to break down pollutant in the leachate to harmless components within 24 hours cycle. The treated effluent is further processed in the reed beds to remove traces of heavy metals. At the final process, final treated effluents achieving the DOE standards are not discharged into water course, but are irrigated in designated zones to be absorbed by vegetation through evapo-transpiration to achieve zero discharge policy.

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SITE PREPARATION TRUCK DISCHARGING WASTE

DAILY COVER

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APPENDIX

SITE VISIT/STUDY VISIT

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ELECTRICITY GENERATION LEACHATE TREATMENT PONDS

SIMPLE BRIEFING ABOUT BTSL

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ELECTICAL GENERATION

SITE PHASE 2 AND GET FAST EXPLANATION HOW THE

PROCESS RUNNING ON AT SITE

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PHASE 2, ACTIVE CELL ALREADY GET COVER BY

DAILY COVERLEACHATE TREAMENT PLANT

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THE PIPE SIZE AND TYPETHAT BE USED BY

BTSL

PHASE 1, ALREADY COMPLETE AND GET COVER BY FINAL

COVER

THE WATER CLASS B THAT BE PRODUCE BY BTSL