A Review on Perishable Household Items

Abstract

With the advancement of technology, kitchen waste generated by the huge population has become a major problem. Kitchen wastes consist of vegetables and fruit peels, bones of meat, fish and uneaten food stuffs etc. These are loaded with nutrients and organic material and can be easily recycled. With recent investigations, it was found that various methods have been carried out in order to obtain biogas like Methane, Hydrogen, etc. from these biodegradable wastes. This paper gives you a review of the various investigations carried out on the amalgamation of kitchen waste by using anaerobic digestion process, composting or biomethanation. Hydrogen is obtained through anaerobic fermentation of household organic waste in the absence of pretreatment or photo-fermentation, or bio augmentation of indigenous fermentative communities. Chronological dark and photo fermentation process is also a new way studied for the manufacturing of bio-hydrogen using kitchen waste. Esterification and hydrolysis process has also been used to combine kitchen waste forming lactic acid. Thermo-chemical hydrolysis of household waste by boosting of temperature, time and chemical compositions, Fourier Transform Infrared Spectroscopy, micro-aeration process results in bio-fuel production. Studies show that Methane formation by using only black water is not as efficient as synthesizing black water and kitchen waste using two-stage up flow anaerobic sludge blanket (UASB) septic tanks at the lower temperatures. Using methods like freezing, thawing, centrifugation, filtration and evaporation, organic acids are produced from anaerobic digestion of household waste. Hence this paper deals with the study of various techniques of kitchen waste usage.