Zastosowanie peroxonu do unieszkodliwiania odcieków z procesu kompostowania
AbstractOne of the basic technological problems identified during the process of composting biodegradable waste are leachates. In the literature of the subject, they’re defined as contaminated process water flowing out from waste during the decomposition process. The leachates contain high concentrations of pollutants (i.e. nitrates, sulphates, toxic metals), which make it impossible to direct them to sewage treatment plants. One of the possibilities to reduce high loads of pollutants in the leachate is the usage of chemical oxidants. Oxidation systems most often use hydroxyl radicals, which have a high electro-chemical potential, resulting from the decomposition of ozone or hydrogen peroxide. These compounds in the right concentration can spread most of the pollutants in a short time. The use of modern oxidation technologies allows in a cheap and quick way to pre-treatment the leachates before directing them to disposal in sewage treatment plants. The main objective of the conducted research was to develop technology for neutralizing leachate generated during the process of composting biodegradable waste with the use of peroxone. The monography presents research on the use of peroxone to neutralize contaminants contained in leachates from the process of composting biodegradable waste, which was carried out on a semi-technical scale. An in-depth knowledge and examination of the impact of peroxone additive on leachates from the composting process and determination of the impact of key parameters on the course and efficiency of this process was an indispensable element to prove the research hypothesis. Using peroxon in selected conditions of the disposal process can reduce the environmental burden of leachates from the composting process. Thus, the influence of the reaction, ozone and hydrogen peroxide concentration, reaction time, chemical oxygen demand, five-day biological oxygen demand, total Kjeldahl nitrogen content and plant toxicity were determined. In addition, the economic and practical applicability of the developed solution for leachate treatment was determined. The average reduction of the examined indicators was respectively: for COD (53%), BOD5 (74%) and Kjeldahl nitrogen (70%). It should be noted that the effective dose of reagents was 1 g∙dm-3 H2O2 and 0.75 g∙Nm-3 O3. The oxidation process was the fastest (4 min) in the slightly acid reaction of the solution (pH 5). The oxidation process used improves the biodegradability of leachate by 76%. It has been shown that the use of advanced oxidizing systems, which include peroxon, can be used to reduce pollutant expressed in chemical and biological oxygen demand, after optimizing the pH of the solution and determining the balance of reactions occurring during oxidation.
|Other language title versions||The use of peroxone for leachates neutralization from the composting process|
|Publisher name (outside publisher list)||Polskie Towarzystwo Inżynierii Rolniczej|
|Publishing place (Publisher address)||Kraków|
|Book series /Journal (in case of Journal special issue)||Inżynieria Rolnicza. Monografie i Rozprawy, (0 pkt)|
|Publication size in sheets||4.35|
|Keywords in English||peroxone, leachate, composting process, oxygen demand|
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