This research is focused on the production of quality biogas, under the monitoring of production parameters; with the general objective of determining the difference between the calorific power and the thermal performance of biogas produced from organic solid waste and liquefied petroleum gas. The results obtained show a biogas with a specific heat of 958 Kcal/m 3 and thermal yield of 9.25% , in addition to a productio n between 1.8 to 2 m 3 of biogas for every 100L of daily load ; T he Anderson Darling test was applied to determine the normality of the data and the ANOVA test to contrast the results. This concluding that the levels of calorific power and thermal performance of biogas are of a high and functional level for any rural and urban project desp ite being lower than those of LPG, providing a reliable proposa l fo r optimization of its waste and implementation of clean biogas production techniques.

The extraction of copper from minerals bornite and chalcopyrite present in the tailings of the Taulis -Calquis -San Miguel de Pallaques -Cajamarca area was evaluated, through the cultivation of microorganisms from acidic waters of environmental liabilities of the Province of Hualgayoc-Cajamarca. The microorganisms from acidic waters were isolated from the environmental liabilities in the Province of Hualgayoc, in parallel the cultivation and reactivation of the Acidithiobacillus Ferrooxidans ATCC 23270 strain was carried out, the cultures were adapted to the minerals obtained from the tailings facility, with the consortium Mixed bacterial obtained, the percentage of effectiveness in copper extraction from bornite and chalcopyrite minerals was evaluated. 19 treatments were carried out, 03 treatments with bornite mineral and bacterial cultures derived from the Thiobacillus ferrooxidans strain ATCC 23270, 03 treatments with bornite mineral and isolated microbial cultures of the same mineral, 03 treatments with bornite mineral and acidic water microbial cultures. 03 treatments with chalcopyrite mineral with mixed bacterial consortium of all cultures, 02 treatments with tailings and mixed bacterial consortium, 02 treatments with pyrite and bornite minerals with mixed bacterial consortium and 03 treatments were control without adding the bacterial culture to the tailings with bornite. The parameters analyzed during the adaptation and bacterial growth phases were pH, Eh, temperature and bacterial population (cells / ml), the percentage of copper extraction was analyzed. In 29 days of treatment, 5.88% copper extraction was obtained from the tailings with the bornite mineraland with a microbial consortium isolated from the same mineral, and 9.53% from the tailings with chalcopyrite mineral using a mixed microbial consortium.

Cyanide ion (CN-) is widely used in different industrial operations, such as jewelry, steel manufacture, gold and silver extraction and electroplating. However, industrial emissions containing the CNion have to be treated to comply with environmental regulations. This research aimed to degrade free cyanide (CNL) present in the tailing of a metallurgical plant that processes gold-bearing ores and uses sodium cyanide (NaCN) as a leaching reagent. Sodium metabisulfite (Na2S2O5) and sodium metabisulfite with hydrogen peroxide (Na2S2O5 + H2O2) were used as oxidizing agents. To evaluate the effect of the factors, we used a factorial design with three independent variables: stirring time, reagent excess percentage, type of reagent and a dependent variable: CNL degradation (mg/L). According to the analysis of variance (ANOVA), the variables influenced significantly CNL degradation, being the most relevant the reagent excess percentage and according to the results, the maximum CNL degradation was 97.67% when 400% of Na2S2O5 was added with 4 hours of stirring.