Dairy Wastewater Treatment Using Orange Peel As Adsorbent
Dairy Wastewater Treatment Using Orange Peel As Adsorbent
Dairy Wastewater Treatment Using Orange Peel As Adsorbent
Key words: Wastewater, Natural Low Cost Adsorbents, Adsorption, Contact time, Water bath shaker.
1. Introduction
Water is the major source to life. Thehuman body weight is made up of about 75% water. The estimation done by WHO
says that about 85% of the rural population lack in potable drinking water. Due to deprived hygiene, malnutrition and
polluted drinking water about 15 million infants die every year in developing countries. About 80% of diseases caused in
developing countries are directly connected with polluted drinking water (WHO). If the water supply provision is made
nearby for consumers in sufficient for their daily needs in turn help greatly in reducing the incidence of skin diseases, eye
infections and also reduce water borne diseases, particularly if the bacteriological quality of water. However, major
improvements in health conditions can be achieved by providing sufficient safe quality and quantity of water, by practicing
domestic hygiene and adopting proper methods of water purification. [1]
Rapid industrialization will lead the waste effluent discharge directly into river or streams thereby causing pollution to the
environment. [3]Rapid industrialization contributes large quantity of wastewater and its treatment is a difficult task.
Compared to other industrials sectors, the dairy industry uses a much greater amount of water for each ton of product and
produce large amount of wastewater. Due to the high contamination load of wastewater, the milk processing industries
discharge raw or partially treated wastewater causing a serious environmental problem, thus appropriate treatments are
required. Reducing the wastewater treatment cost is gaining importance in recent years in vision of environmental
sustainability. Biological methods are usually used for the treatment of dairy wastewater due to its biodegradable nature.
But these methods consumes large amount of energy and also they are very complex. It is necessary to pre-treat dairy
wastewater in prior to biological treatment. [5] The effluents generated from dairy industries are the main source for
pollution to the environment. The wastewater arising from dairy products contains high organic matter. The dairy
industry in India generates 6-10 litres of wastewater per litre of the milk processed. [6]
The raw milk is processed into various dairy products such as milk, yogurt, cheese, butter, ghee etc. and leads to
generation of large quantity of wastewater which contains very high concentration of organic substances such as proteins,
carbohydrates and lipids. [7]There are many techniques in practice to treat the dairy wastewater, in the present study; an
attempt has been made to examine the application of low cost adsorbents like orange peels for the treatment of
wastewater from local dairy farm in Mysuru, Karnataka, India and also to evaluate the optimum dosage of adsorbent and
its contact time for efficient removal of study parameters.
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Karnataka Milk Federation (KMF) Limited is the crest body for the dairy co-operative movement in Karnataka. KMF is
the second largest dairy co-operative among all the dairy cooperatives in India. In South India, KMF stands in first
position in terms of sales as well as procurement. The basic mission of the Federation is marketing Milk and it’s by
Products. The Brand "Nandini" is the name for Pure and Fresh milk and its products. KMF comprises of 14 Milk Unions
covering the entire State, which obtain milk from Primary Dairy Cooperative Societies (DCS) and distribute milk to the
patrons in various Towns/Cities/Rural markets in Karnataka. The activities on Dairy Development were taken up in
the year 1975Under the World Bank aided Karnataka Dairy Development Projects. On 23.11.1976 The Mysore District
Co-operative Milk Producers Societies Union Ltd was registered, having the jurisdiction extended to the entire Mysore
District and Five Taluks of Mandya District.Mysore Dairy which is known as MYMUL (Mysore Milk Union Limited)
having capacity of 10 TLPD started in the year 1965 under the control of the Department of Animal Husbandry and
Veterinary Services of Karnataka State later in the year 1974 it was transferred to Karnataka Dairy Development
Corporation. In 1980 the volume was expanded to 60 TLPD under the scheme operation flood and transferred to the
KMF in 1984. On 01.06.1987 as per the Government policy the Dairy and its Centres were handed over to MYMUL.
The volume was expanded to 100 TLPD under the Operation Flood II and further expanded to 180 TLPD under
Perspective Plan I Programme. Later capacity was expanded to 300 TLPD.
Recent investigation has proved that orange peel waste is a hypothetically valuable resource that can be established
into high value products such as methane. Orange peels which control the following parameters in the industrial waste
water such as pH, COD, TSS (Total suspended Solids), TDS (Total suspended Solids), Chloride, Volatile acidity, Sulphate
and total nitrogen, nitrate and nitrite, total phosphorous. Extremely coloured industrial wastewater is a serious
environmental problem as it seriously affects the aesthetic appearance of waterways and also stops the penetration of
sunlight thereby affecting the photosynthesizing plant species in the water. Orange peels could be used to remove acid
dyes from industrial effluent. Orange peels are considered in this study as raw material for the production of citric acid
by solid state fermentation. Orange peels contain pectin and soluble sugars as the main constituents. The orange peels
contain 16.9% soluble sugars, 3.75% starch, 1.95% fats, 6.5% proteins and 10.5% hemicelluloses 10.5%. [4]
2.3 Preparation of Orange peels for experimental investigation (De –Hydrated Method )
Orange peels were collected from local markets & juice centres and washed numerous times with tap water to remove
the observing dirt. Further, peels were kept open area to dry itunder sunlight for 3-4days, then kept in an Oven for
2hours at 750C and preserved in a desiccator for half an hour. Later the orange peels were chopped into smaller pieces
and finally grinded into a fine powder, sieved through a 300μ sieve and the powder was stored in a container which is
airtight before starting the experimental investigations. Figure 2.1 and 2.2 shows the orange peels and orange peel
powder used for treatment process.
Water bath shaker shown in figure 2.3, the purpose of this is to shake steadily and mix samples while maintaining a
temperature at constant. Water bath shaker are used in application like culturing cells, hybridization, adsorption and
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molecular biological assays. Three conical flasks were taken with 500ml of dairy wastewater samples each, 0.2g of orange
peel powder was added into all the flasks and kept in an Water bath shaker for different contact times of 0 to 2hours (i.e.,
0, 60, 120 minutes each respectively) after which the samples were analysed for various study parameters like pH, BOD,
COD, sulphates, TDS, TSS, chlorides & turbidity and the tests were repeated for dosages of 0.4, 0.6 &0.8 g respectively.
The characteristics parameters of dairy wastewater generated are high due to floor washing, washing cans and
equipment’s. Plastic cans of 5 litres capacity were used for sampling. The cans were rinsed several times with distilled
water. The samples were collected using the grab sampling technique. The collected samples were transported to the
laboratory and various parameters where analysed by Standard Method (American water works Association (AWWA).[1]
The result showed that Total dissolved Solids is in the range of 9742 mg/L and the turbidity is in the range of 1801 NTU
where BOD and COD was very high as 2780 mg/L and 4474 mg/L respectively.
3.2 Effects on pH
It is observed that, as the dosage and the contact time are increased, the pH of the water sample gradually decreased.
This could be attributed to the citrus nature of Orange peels, as the dosage is increased; the acidity of the water
sample also increased there by decreasing the pH of sample. The corresponding results are plotted (fig 3.1) and
tabulated in table 3.2.
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Table 3.3: Chlorides results for different dosage and contact time
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250
200
0.2gm
150
0.4gm
100
50 0.6gm
0 0.8gm
0 20 40 60 80 100 120 140
Contact time in minutes
Fig 3.3: Chlorides variation for different dosage v/s contact time
Table 3.4: Sulphates results for different dosage and contact time
3130
3120
3110 0.2gm
3100 0.4gm
3090
0.6gm
3080
3070 0.8gm
3060
3050
0 20 40 60 80 100 120 140
Contact time in minutes
Fig 3.3: Sulphates variation for different dosage v/s contact time
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Table 3.5: Turbidity results for different dosage and contact time
2000
1800
1600
Turbidity in NTU
1400
1200
0.2gm
1000
800 0.4gm
600 0.6gm
400
200 0.8gm
0
0 20 40 60 80 100 120 140
Contact time in minutes
Fig 3.4: Turbidity variation for different dosage v/s contact time
Table 3.6: Total Dissolved Solids results for different dosage and contact time
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8000
0.2gm
6000
0.4gm
4000
0.6gm
2000 0.8gm
0
0 20 40 60 80 100 120 140
Contact time in minutes
Fig 3.5: Total Dissolved Solids variation for different dosage v/s contact time
Table 3.7: Total Suspended Solids results for different dosage and contact time
600 0.2gm
400 0.4gm
200 0.6gm
0.8gm
0
0 20 40 60 80 100 120 140
Contact time in minutes
Fig 3.6: Total Suspended Solids variation for different dosage v/s contact time
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Table 3.8: BOD results for different dosage and contact time
2500
BOD in mg/L
2000
0.2gm
1500
0.4gm
1000 0.6gm
500 0.8gm
0
0 20 40 60 80 100 120 140
Contact time in minutes
Fig 3.7: BOD variation for different dosage v/s contact time
Table 3.9: COD results for different dosage and contact time
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3000 0.2gm
2000 0.4gm
1000 0.6gm
0.8gm
0
0 20 40 60 80 100 120 140
Contact time in minutes
Fig 3.8: COD variation for different dosage v/s contact time
4. CONCLUSION
For the growth and development of rural India Dairy industry being one of the big industriesshould contribute to the
growth. A dairy consumes huge quantity of water for various purposes and the wastewater generated from a dairy is
also equally huge in volume with highly variable contamination characteristics. Wastewaters from dairy plants is a-
raised from washings of cans, dairy equipment’s, floors etc. and therefore resulting in high organic solid
concentrations particularly milk suspensions. This experiment was done to determine efficiency of orange peel
powderwhich is a natural adsorbentand an effective adsorbent in treating dairy wastewater. From the result obtained
it is clear that the orange peel can be used as an excellent adsorbing medium in treating dairy wastewater.The results
showed that the pH was reduced to 6.2 from 8.4, The BOD & COD removal was observed to be 70.79% & 74.58%
respectively. Turbidity and sulphates removal was observed to be 35.53% and 47.61% respectively. There was a
superficial increase in the chloride and total suspended solids level by 36.47% and 80.66% respectively. Total
dissolved solids removal was observed to be 86.86%. The concept of utilizing Orange peels has proved to optimize the
quantity of waste in dairy wastewater and an effective, Economical & a sustainable method to treat the dairy
wastewater.
5. REFERENCES
1. American Public Health Association, American Water Works Association and Water Pollutional Control
Federation (WPCF) 1989. Standard Methods for the examination of Water and Wastewater, 17th Ed., APHA
Pub. Office, Washington D.C.
2. Anju S; K.Mophin-Kani. Exploring the use of Orange Peel and Neem Leaf Powder as Alternative Coagulant in
Treatment of Dairy Wastewater. International Journal of Scientific & Engineering Research.2016, Volume 7,
Issue 4, ISSN 2229-5518.
3. Gaurav R. Dukare; ApekshaBhoir; SanchitaRaut; ParagParkar; Prof.ShilpaDeshpande;Prof.KiranThombre.
Removal of Heavy Metals By Means of Banana and Orange Peels. International Journal of Innovative Research
in Science, Engineering and Technology. 2018,Volume 7, Issue 4,ISSN (Online): 2319-8753.
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Wastewater by Using Orange Peels & Fish Scales. International Journal for Scientific Research & Development.
2017, Volume 5, Issue 01, ISSN (online): 2321-0613.
5. Shabna Banu A.M; Meena John M. Pre-Treatment of Dairy Wastewater Using Biopolymeric Flocculant
Extracted from Orange Peel. International Journal of Advance Research in Science and Engineering. 2017,
Volume 6, Issue 5, ISSN (O) 2319 -8354.
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6. Sivakumar D;Shankar D;JanakiSundaram S. Treating dairy industry effluent using orange peel powder. Journal
of Chemical and Pharmaceutical Sciences. 2016, Volume 9 Issue 3, ISSN: 0974-2115.
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dairy wastewater using orange and banana peels. Journal of Chemical and Pharmaceutical Research. 2015,
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