Qualitative Study of Compost Fertilizer Produced in Zahedan Factory, Considering Physical and Chemical Characteristics
Subject Areas : environmental managementFarah Heydari 1 , Gholamreza Miraki 2
1 - - Iranian Acadmic Center for Education, Culture and research (ACESR), Sistan and Baluchestan branch, Iran.
* ( Corresponding Author)
2 - - Department of Safty and the Environment Hills Pbny Italy University
Keywords: compost, Standard, Pollutant, recycle,
Abstract :
Background and Objective: Compost is extracted from the Latin word “Compositus”, meaning compound or mixture and sometimes it is known as mixed fertilizer in Persian language. Regarding the economic values of spoilable substances, producing fertilizer from waste not only will help to ues this value, but also in this way, the waste and its recycling can be controlled. Thus, construction of compost factories for hygienic repulsion and production of valuable fertilizer, are the main preferences of urban waste management in the country. Objective of this study is evaluation of physical and chemical quality of compost fertilizer, produced in Zahedan Factory, and its comparison with the standards in Iran and the world. Method: In this study, the compost fertilizer produced in Zahedan Factory was investigated during 9 months. To determine the physical and chemical characteristics of the compost produced in this factory, the factors such as pH, electrical conductivity, organic carbon, azoth, phosphor, lead, cadmium, zinc and copper were evaluated. Microbial specifications of the produced compost are also specified by determination of culiferoum, Salmonellae, and parasite zygote. Results: Evaluated factors are: average percentage of carbon (4.2 ppm), percentage of azoth (1.98 ppm), percentage of lead (89.98 ppm), percentage of cadmium (2.695 ppm). The microbial quality of the produced compost was in B level of Environmental Protection Organization of America. Conclusion: Results demonstrated that the produced compost, in terms of heavy metals, was in the range of UN, America and Canada standards (AAFC, CCME, and BNQ) and was reasonable according to the National Standards of Iran. Carbon and azoth percentages meet the compost standards in most cases. However, considering that the ratio of carbon is higher than the ratio of azoth, it is necessary to add vegetable and fruit wastes - that contain higher nitrogen - to the compost ingredients. Amount of phosphor is placed in rank 2 of National Standards of Iran. pH is almost higher than standard levels; in this case adding a little sulfur will solve the problem. Compost fertilizer samples are applicable as soil reclamation factor. Waste segregation at source and establishment of thermophilic conditions in mass are two effective strategies that should be concentrated to improve the quality of compost fertilizer.
1- Salehi.Technical and economical study of Khomein Compost Factory in compared with T ehran Compost Factory [dissertation].Tehran: Iran University of Medical Sciences; 2008. (In Persian).
2- Wei,et al,2003,Technology of MSW Composting The Technology of The Municipal Solid Wastes Composting.Life Science College Northeast Agricultural University, Harbin,Heilongjiang 150030, China, Chaina Agricultural University, Beijing, China Zimin Natura and Science, 1(1), 2003.
3- Shiralipour.A,et al.1992,Physical and chemical properties of soils as affected by municipal solid waste Compost application Biomassand Bioenergy, Volume3, Issues3-4, 1992,Page261-267.
4- Sharma,V.K.,Candietelli,M.,Fortuna,F.&Cornacchia,G Process of Urban and agro-industrial residues by aerobic Composting: review, Energy Conversion and Management,38,453-478,1997.
5- Tchobanoglous G, Kreith F.Handbook of Solid Waste Management.2nd ed.New York: McGraw-Hill; 2002.
6- Gerngross CA,Farland MC,Thompson WH.Compost sampling guideline dairy compost utilization.Prepared in cooperation with Texas commission on environmental quality and USA Environmental Protechtion Agency; 2006.
7- Test Method of composts and composting.Final release united state composting series G,800 pp.University of Kassel;2000
8- RAL, Environmental label; blue angel product requirements- soil improve/adjustment made from compost.RALdetaches institute fur gutesicherung und Kennzeichnung (www.blauer-engelde);1998.
9- Agency for water protection and waste management.technic verdung over refuse. (Swiss waste rule).3011 Bern; 1990.
10- Canadian T.Mindesqualitat von compost. (Minimum quality standard for compost).fac-edmz 3000 Bern; 1995.
11- Composting council of Canada.Setting standard: asummary of compost standard in Canada. [Updated 2000; cited 2008 Jun 14].Available from:www.compost.org/standard.
12- Compost council of Canada.Compost standard review.www.compost.org/ standard.1999
13- Wiliam F, Brinton F.Compost quality standard guideline.New York: Association of Recyclers; 2002.
14- Europe union council regulation.regulation organic forming. EEC no. martgarf verlug. 1998.
15- Institute of Standard and Industrial Research for Tehran:ISIRI No.10716; 2007(In Persian)
16- United States of Environmental protection agency. Sludge guideline. Proposed rule.Federal registers and published as CFR 40 chap 503. Final rule.Feb 1993
17- DHV.Composting in European Union. DHV euro commission; 1999.
18- Standard for compost.Briefing note. CAS 2.UK composting association; 2000.
19- Kraus P.wilke M.Schadstoffe in bioabfall compost. (Contaminant in bio-compost) mull und abfall.4-97.211-219; 1999.
20- Compost workshop.Steps toward a European compost directive.fed. Ministry for environment.Vienna Austria.2-3 nov;1999
21- ORCA.A review of compost standard in Europe.Tech Publishing; 1992.
22- SEPA.Compost quality and potential for use.Stockholm: Swedish EPA; 1997.
23- Renkow M, Rubin R.Municipal solid waste composting, does it make economic.North Carolina: North Carolina State University; 1996.
