ENVIRONMENTAL CONSIDERATIONS OF PALM OIL WASTE Mohamad Azim b. Mohd Adam*, Ahmad Rabbani b. Rosli**, Mohd Hafiz Firdaus b. Abdol Sukor** * Mechanical Engineering Student, Universiti Teknologi Malaysia , Malaysia, 017-8807736,
[email protected] ** Mechanical Engineering Student, Universiti Teknologi Malaysia , Malaysia, 014-2656260,
[email protected] *** Mechanical Engineering Student, Universiti Teknologi Malaysia , Malaysia, 013-2751970,
[email protected]
Palm oil industries are one of the largest industries in Malaysia other than rubber and the product has helped to change the scenario of its agriculture and economy. Oil palm was first introduced to Malaysia from Nigeria by the British colonialists in 1917. It was however not until the Malaysian government decided to promote oil palm as an alternative plantation crop in its Agricultural Diversification Policy in the 1960s that its cultivation took off. Oil Palm plantation has increased from 2.03 million hectares to 4.49 million hectares from 1990 to 2009, an increase of 121.2%, in Malaysia [1]. It makes Malaysia as the second larger in the production of palm oil after Indonesia surpassed Malaysia in 2006. Presently, the used of palm oil in food or non-food applications or either used as it is or in fractionated forms to produce a wide variety of products and the flexibility and versatility in advanced technology had been one of the reasons to the increment in the popularity of palm oil [2]. The increasing of palm oil demand each year can help Malaysia in generating a vibrant economy. According to the statistics released by Malaysia-Romania Palm Oil Trade Fair and Seminar (POTS), the amount of Malaysia’s palm oil export for the whole year in 2011 are approximately about 17.99 million tones with a net worth of RM 80.4 billion. China is the biggest consumer in palm oil with 22% following by the European Union (EU) with a percentage of 11% and the third biggest biggest is Pakistan with 10%. The total exports of Malaysian Malaysian products are
worth RM 694.5 billion and out of that, RM 80.4 billion were contributed by the palm oil industries. With an increase in demand, environmental management in the palm oil industry has become an issue of major concern today. The mills are most often located in the plantations and the prevailing practice is collecting the waste and dumping in the most unscientific manner as excess nutrients may be harmful to both the growing plants and the ecology on the whole [3]. The palm oil industry generates two major products from the processing of Fresh Fruit Bunches (FFB) namely Crude Palm Oil and Crude Palm Kernel Oil. The production of these two products will yield certain type of wastes and are mainly in the form of the Empty Fruit Bunches (EFB), Oil Palm Shell (OPS), Palm Fiber, Palm Oil Mill Effluent (POME) and sterilizer condensate. The Empty Fruit Bunches (EFB) is a lignocelluloses material which typically contains 25% of lignin, 50% of cellulose and another 25% of hemicelluloses in their cell wall [4]. For the past few years, EFB was being used as one of the fuel to generate steam to produce power source. The burning of EFB caused serious environmental concern as in order to Crude Palm Oil also it needs a burning of FFB and this will increase the air pollution. For a typical 500,00 tonnes of CPO, it may require the burning of 17,5000,000 tonnes of FFB which later produce 1 to 1.5 tonnes particulate matter to atmosphere per mil. The total amount of particles emitted by 309 palm oil mills in Malaysia is then about 154,500 tonnes in a day [5]. So, if this burning combined with the EFB burning, then the amount of air pollute will be higher. Composting treatment is the most lucrative option from the various waste management strategies because it reduces costs, thereby increasing profit, as well as being an environmentally sound solution. The process reduces EFB volume so that it is easier to transport and spread on the fields. Furthermore, it helps protect the soil and crops by reducing the risk of weed seeds, parasites, and pathogens spreading, which is a common problem with using manure as a fertilizer. Composting is not only more cost-effective than mulching, but it solves some logistic issues as well. For example, when the weather is unfavorable for spreading mulch, the EFB can undergo composting treatment and the resulting product can be distributed when the conditions in the field become more appropriate. Empty fruit bunch (EFB) composting treatment not only offers oil palm plantations a cost-effective and environmentally-friendly solution to dispose of their waste, but also provides another product with saleable value.
Palm Oil Mill Effluent (POME) is the effluent from the final stage of palm oil production in the mill. It is the largest Palm Oil industry by-product, a colloidal suspension containing 9596% water, 0.6-0.7% oil and 4-5% total solids including 2-4% suspended solids [6]. It is estimated that for 1 tonne of crude palm oil produced, 5-7.5 tonnes of water ends up as POME [7]. The palm oil industry still considers POME treatment as a burden rather than as part of the production process. For these obvious reasons, a raw POME or treated POME are still being discard into nearby rivers or land , as this is the easiest and cheapest method of disposal. POME is a thick, brownish in color, liquid with a discharged temperature between 80-900 , being fairly acidic with a pH value of 4.0-5.0 [8]. So the excessive quantities of untreated POME deplete a water body of its oxygen and suffocate aquatic life.
This situation can be significantly improved as POME contains high concentration of protein, nitrogenous compounds, carbohydrate, lipids and minerals that could be converted into some useful material [9]. A bio-gas can be produced by processing POME. A process in which microorganism break down biodegradable material in the absence of oygen. About 400 of bio gas can be produced from 100 tonnes of POME. Some fertilizers also can be derived from POME and used in the farms and vegetation areas. Other than that it is also found the gas composition contained hydrogen (66-68%) and carbon dioxide (32-34%) that can be produced from POME using anaerobic micro flora and this generated gas is free from methane [10].
The Oil Palm Shell (OPS) is another one of the waste products. The hard shells are directly attained by breaking the palm kernel shells with machinery. In Malaysia, there is an annual production of over 4 million tonnes of waste OPS. Exploiting this waste material not only maximizes the use of oil palm, but also helps preserve natural resources and maintain ecological balance. The OPS aggregate has a unit weight of 500-600 kg/ and this is approximately 60% lighter compared to the conventional crushed stone aggregates [11]. Therefore the OPS might be used in the production of cheap tiles concrete so that it can be used for low-cost houses since the demand for low cost houses are increasing. By implementing this waste management, it will generate a new source of income as the OPS product can be used for construction rather than use it for generate steam for boilers.
Malaysia is one of the world’s palm oil producers and has been taking steps in order to sustain the palm oil industries. Numerous obstacles and emphasis from various parties whether within or outside the country. The government should take some action towards obtrusion given by some parties and the reason why this journal was written is to throw and suggest some methods that can be implement to overcome one of the biggest palm oil problem which is waste management. If this journal can be take into consideration, then the following problems have been eliminated: 1) Air pollution from fuel oil combustion has been reduced 2) the problem of odour, the difficulties in acquiring waste water treatment sites, and the complaint from local communities. 3) the operating staff is now capable in terms of process control and environmental management. REFERENCES
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