maturity and stability evaluation of composted municipal solid wastes
نویسندگان
چکیده
conclusions the produced compost in this study was mature and ready for use as an agricultural substrate or soil conditioner after 80 days of composting. results the results showed that the c/n ratio decreased during the composting process (reached to 15.6) due to the loss of carbon and the increase in nitrogen content per unit material; also, the nh4+/no3 ratio decreased with increase in the time of composting and reached to 1.08. in addition, the microbial parameters including salmonella and total and fecal coliforms decreased significantly at the end of the composting period and reached to standard values. furthermore, germination index (gi) increased during the composting process and the compost samples at the end of the composting phase had gi values greater than 90. objectives at the present study, the maturity and stability of composted municipal solid wastes at a biocompost plant was evaluated. materials and methods for the assessment of compost maturity, important parameters including temperature, moisture content, ph, electrical conductivity, carbon-to-nitrogen (c/n) ratio, microbial parameters including salmonella, total and fecal coliforms were measured during the composting process (80 days). in addition, phytotoxicity as seed germination index and heavy metals concentration (zn, cu, cr, ni, cd and pb) was determined at the end of the composting time. background composting process is a feasible biological treatment for the recycling of municipal solid wastes as a soil amendment. the principal requirement of compost for it to be safely used in soil is a high degree of stability or maturity, which implies stable organic matter content as well as the absence of phytotoxic compounds and plant or animal pathogens.
منابع مشابه
Composting of Municipal Solid Wastes
The generation of municipal solid waste is increasing year by year and there are many options for handling and disposing of these wastes. Currently in United States land disposal is the most common practice to deal with municipal solid wastes. The evolution of waste generation, and increase in population suggest composting as a future alternative. Since municipal solid waste comprises of a high...
متن کاملMunicipal solid wastes and their disposal.
A brief overview is given of the sources, characteristics, and toxic constituents of municipal solid wastes. Several methods are presented for handling, treating, and disposal of solid wastes. Monitoring the landfill site is necessary; there has been a trend to recognize that municipal solid wastes may be hazardous and to provide separate secure handling, treatment, and disposal for their dange...
متن کاملBiogasifica Tion of Municipal Solid Wastes
This is a rather interesting and ingenious experi mental laboratory approach to handling the organic fraction of municipal solid waste. Since this organic fraction is the portion that is putrescible, it presents a special disposal problem. Once segregated, it might be usefully disposed in the manner sug gested. However, much separation and preparation are required to obtain the organic fracti...
متن کاملValorization of municipal solid wastes through biogas production in Iran
Iran is a developing country with a population of over 80 million. The total daily MSWs production in Iran is about 50 million kg. Most of the MSWs in this country is being disposed of in the landfills. Some of the landfills are located in the urban area or near to sea, river, and forest. In this regard, the management of MSWS becomes a concern in Iran. One solution to manage MSWs and mitigate ...
متن کاملComparison of methods for evaluating stability and maturity of co-composting of municipal solid wastes and sewage sludge in semi-arid pedo-climatic condition
The step of maturation (around 60 days) appeared less active as compared to the first step of pre-fermentation (around 90 days) since the values of temperature, recorded during the second step of maturation, are found generally less important than those recorded during the first step. A similar tendency of C/N ratio values decrease is generally observed in the two piles of wastes during the two...
متن کاملمنابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
health scopeجلد ۵، شماره ۱، صفحات ۰-۰
کلمات کلیدی
میزبانی شده توسط پلتفرم ابری doprax.com
copyright © 2015-2023