Designing a Latex Effluent Treatment System Using Acid Coagulation Rubber Recovery Tank in Series with a Constructed Wetland
Keywords:
Natural rubber, latex effluent, acid coagulation, constructed wetland, designAbstract
Agro industries are at the center of Cameroons economy and the Cameroon Development Corporation (CDC) is the country’s largest agro producer of natural rubber which cultivates and transforms latex and field coagula into industrial grade materials. An average of 6800 tonnes of rubber is produced at the Tiko factory .This generates heavy quantity of effluent been channeled directly to the surrounding waters, constantly polluting it and affecting the surrounding population, company’s image and the ecosystem thus violates Cameroon and ISO 14001 standards. Causing losses of unrecovered rubber, extra charges, sanctions on the company and inability to obtain ISO14001 certification. Therefore it is necessary to design a rubber recovery and effluent treatment system to reduce the damages caused by this untreated effluent. In other to do so we analyzed the existing state, we characterized the waste water and designed a new system taking In to consideration key design constraints like high rubber recovery , use of existing structures onsite , zero energy needed and system efficiency. After analysis of the present state, we recorded the effluent characteristics of, flow rate of 22.2m3/day, TSS of 1031.4 mg/l, BOD5 1080 mg/l which are extremely higher than standards. Thus using a formic acid coagulation tank as primary treatment in series with a constructed wetlands as a biological treatment will ¶efficiently remove suspended solid, BOD, COD, phosphorous and, especially to ensure total nitrogen removal. By evaluating the formic acid coagulation we recorded 80- 85% rubber recovery, thus a reduction in turbidity, also we sized a horizontal flow constructed wetland using Echinochloa Pyramidalis to remove the high organic load. 2 parallel wetlands of area of 2*293.3 m2 , dimension (45.3 x 6.5 x 0.6)m , retention time of 1 day , bed porosity of 0.3 made up of fine gravels-sand filter bed with 9 plants per m2 of Echinochloa Pyramidalis, for a projected final discharge effluent of TSS<30mg/l, BOD5< 50mg/l. Finally we design using Microsoft Visio and solid works to represent a 3 dimensional view. The use of this design in NR agro industries will recover more of its rubber lost in the effluent and treated effluent is in conformity with ISO 14001 standards thus avoiding all the charges link to pollution and improve its company image.
References
. Napi Wouapi, Tamo V. Maimo. “ Towards a comprehensive analysis of cleaner technology potentials to address industrial pollution arising from natural rubber processing industry: A case study of cameroon development corporation -rubber factories ” Msc. Thesis Project. Roskilde University, Denmark, 2007.
. Clay. J. W. (2004, March). “World Agriculture and the Environment: A Commodity by commodity Guide to Impacts and Practices.” Island Press [On-line] 570(345) pp. 333-347. Available: www.IslandPress.org/ourstory [May 1, 2020].
. Iyagba MA., Adoki A., Sokari T, (2008, June). “Testing biological methods to treat rubber effluent. ” Afr. J. Agric. [On-line] 3(6), pp. 448-454. Available:http:www.academicjournals.org/AJAR [June 11, 2020].
. Siriluck L. “ Characterization of lipid composition of sheet rubber from hevea brasiliensis and relations with its Structure and Properties. “ PhD thesis, university of Montpelier, France, 2008.
. Massoudinejad M, Mehdipour-Rabori M, Hadi Dehghani (2015, Oct.). “Treatment of natural rubber industrial wastewater through a combination of physicochemical and ozonotion process. ” J Adv. Environ Health [On-line] 3(4), pp. 242-9. Available: http:www.jaehr.muk.ac.ir/article-40208.html [June. 11, 2020].
. Nguyen, Nhu Hien, Luong, Thanh Thao, (2012, July). “ Situation of waste water treatment of natural rubber latex processing in the Southeastern region, Vietnam. ” J. Viet. Env. [On-line] 2(2), pp. 58-64. Available: http:www.openacess.tu-dresden.de/ojs/index.php.jve/ [June. 13, 2020].
. Mitra Mohammadi, Hasfalina Che, Mohd Ali and Phang Lai (2010, September) “Treatment of
wastewater from rubber industry in Malaysia.” Academic Journals, [On-line] 9(38), pp. 6235 -6240. Available: http://www.academicjournals.org/AJB [June. 13, 2020].
. Kantachote D, Torpee S, Umsakul K (2005, December). “ The potential use of an oxygenic phototrophic bacteria for treating latex rubber sheet wastewater. ” E-J. Biotechnology, [On-line] 8(3),pp. 314-323. Available: http://10.2225/vol8-issue3-fulltext-8 [June. 19, 2020].
. Chua ET, Garces LR (1992, September). “Waste Management in the Coastal Areas of the ASEAN Region: roles of governments, banking institutions, donor agencies, private sector and communities. ” Ministry of the Environment and Canada-MEAN Centre, Singapore, [On-line] 740 pp. 117-126. Available: http://pubs.iclarm.net/libinfo/Pdf/Pub%20CP6%2033.pdf [June. 20, 2020].
. Anotai J, Tontisirin P, Churod P (2007, April). “Integrated treatment scheme for rubber thread wastewater: sulphide precipitation and biological processes. ” J. of Hazardous Mater. [On-line] 141(1), pp. 1-7. Available: http://10.1016/j.jhazmat.2006.11.029 [May. 19, 2020].
. Lung’aiya H, Sitoki L, and Kenyanya M, (2001, August) “The nutrient enrichment of Lake Victoria (Kenyan waters). Hydrobiologia. [On-line] 458, pp. 75–82. Available: 10.1023/A: 1013128027773 [June 29, 2020].
. Ulrike Lipkow, Elisabeth von Münch (2009, March) “Case study of sustainable sanitation projects constructed wetland for a peri-urban housing area Bayawan City, Philippines.” SuSanA [On-line] pp.1-7 Available: http/www.susana.org [June. 30, 2020].
. Ciria P, Solano M, and Soriano P, (2005, December), “Role of macrophytes typha latifolia in a constructed wetland for wastewater treatment and assessment for its potential as a biomass Fuel.” Bio Systems Engineering, [On-line] 92(4) Pp. 535-544. Available: http://10.1016/j.biosystemseng. 2005.08.007 [June. 30, 2020].
. Avsar Y, Tarabeah H, Kimchie S, and Ozturk I, (2007, January) “Rehabilitation by Constructed Wetlands of Available Wastewater Treatment Plant in Sakhnin” Ecological Engineering, [On-line] 29(1) Pp. 27-32. Available: 10.1016/j.ecoleng.2006.07.008 [July 02, 2020].
. Davor Stankovićm (2017, October). “Constructed wetlands for wastewater treatment. ” Građevinar [On-line] 29(1) Pp. 27-32. Available: https://doi.org/10.14256/JCE.2062.2017 [July. 02, 2020].
. Hoffmann H, Platzer C, Winker M, Von Muench E. (2011, February). “Technology review of constructed wetlands-subsurface flow constructed wetlands for greywater and domestic wastewater treatment” (GIZ) GmbH, Eschborn. [On-line] pp. 1-35. Available: http/www.gtz.de/ecosan [July. 07, 2020].
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