Enhanced anaerobic treatment of CSTR-digested effluent from chicken manure: The effect of ammonia inhibition

2012 ◽  
Vol 32 (1) ◽  
pp. 137-143 ◽  
Author(s):  
Zhan-Guang Liu ◽  
Xue-Fei Zhou ◽  
Ya-Lei Zhang ◽  
Hong-Guang Zhu
2020 ◽  
Vol 10 (21) ◽  
pp. 7825
Author(s):  
Yevhenii Shapovalov ◽  
Sergey Zhadan ◽  
Günther Bochmann ◽  
Anatoly Salyuk ◽  
Volodymyr Nykyforov

Providing anaerobic digestion is a prospective technology for utilizing organic waste, however, for waste with a high content of nitrogen such as manure, dilution is necessary to decrease the ammonia inhibition effect which leads to the production of a huge effluent amount which is difficult to use. Dry anaerobic digestion has some advantages such as reduced reactor volume, higher volumetric methane yield, lower energy consumption for heating, less wastewater production, and lower logistic costs for fertilizers. These factors generate interest in using it for treatment of even high-nitrogen substrates. The purpose of this work was to analyze different dry anaerobic digestion technologies, the features of dry anaerobic digestion, laboratory studies on chicken manure dry anaerobic digestion, and methods of reducing inhibitors’ effects. Nowadays, there are no dry anaerobic industrial plants working on chicken manure. However, studies on dry anaerobic digestion of chicken manure have proven the possibility of methane production under fermentation of chicken manure with high total solids content, but the process has been described as being unstable. Co-fermentation, ammonium/ammonia removal, and adaptation of the microbial consortium have been used to decrease the effect of ammonia inhibition. A prospective way for ammonia concentration control is absorption using a non-volatile sorbent located in the reactor. It decreases ammonia content during wet anaerobic digestion by 33% and it is characterized by having a positive economic effect. Therefore, dry anaerobic fermentation of chicken manure is possible, but there is still no efficient way to provide it. The results of this article should be helpful in the selection of anaerobic digestion technology for treating chicken manure.


2018 ◽  
Vol 97 ◽  
pp. 186-199 ◽  
Author(s):  
Werner Fuchs ◽  
Xuemei Wang ◽  
Wolfgang Gabauer ◽  
Markus Ortner ◽  
Zifu Li

2001 ◽  
Vol 73 (2) ◽  
pp. 154-164 ◽  
Author(s):  
E. Aspé ◽  
M.C. Martí ◽  
A. Jara ◽  
M. Roeckel

2016 ◽  
Vol 8 (4) ◽  
pp. 382-387
Author(s):  
Vitalij Kolodynskij ◽  
Pranas Baltrėnas

The investigation device – small size periodic operation bioreactors, which are developed for the production of biogas from different organic, vegetable waste. The device operates by maintaining optimum operating temperature and oxygen concentration required for anaerobic treatment process inside the bioreactor. Under favorable conditions, organic substance is being degradated because of anaerobic processess, colonies of microorganisms grow, and methane bacteria produce CH4 – useful flammable gases, which can be used as natural gas analogue. The gas is stored in special tanks of gas – gas holders. A study was implemented by analizing five different loads, according to the mixing ratio of vegetables (potatoes) and chicken manure waste. The quality and quantity of biogas was analized as well. It was found that the highest concentration of methane (67.8%) was achieved by using a load consisting only of chicken manure, but after evaluation of biogas yield, it was found that the best result (according to the quantity of biogas, a high concentration of CH4 and time of load degradation) is achieved using chicken manure and potato waste mix (relatively 70 and 30%). Mesophilic process temperature during the experiment was 33–35 °C, and oxygen concentration – 0.0–0.1%. After research implementation there will be an opportunity to create small size periodic operation bioreactors, which can be used in small farms or private houses, where the small amount of organic waste and manure are formed. Nagrinėjamas įrenginys – mažų matmenų periodinio veikimo bioreaktorių laboratorinis stendas, skirtas biodujų gamybai iš skirtingų organinės, augalinės kilmės atliekų. Stendas veikia palaikant optimalų temperatūrinį režimą ir anaerobiniam procesui reikalingą deguonies koncentraciją bioreaktorių viduje. Esant palankioms sąlygoms, vyksta įkrovos organinių medžiagų anaerobinės degradacijos procesai, auga mikroorganizmų kolonijos, ir metanogeninės bakterijos, kurios yra priskiriamos prie labai jautrių anaerobų, gamina metaną CH4 – energijos atžvilgiu naudingas degias dujas, kurias galima panaudoti kaip gamtinių dujų analogą. Biodujos yra saugomos specialiose dujų talpyklose (angl. gas holders). Atliktuose tyrimuose buvo nagrinėjamos penkios skirtingos pagal sumaišymo santykį daržovių (bulvių) atliekų ir vištų mėšlo įkrovos, biodujų sudėtis ir jų kiekis. Nustatyta, kad didžiausia metano koncentracija (67,8 % buvo pasiekta naudojant įkrovą, sudarytą tik iš vištų mėšlo, tačiau įvertinus biodujų išeigą nustatyta, kad geriausias rezultatas (pagal biodujų kiekį, aukštą CH4 koncentraciją ir įkrovos skaidymo laiką) pasiekiamas naudojant vištų mėšlo ir bulvių atliekų įkrovų mišinį (sumaišymas atitinkamai 70 ir 30 %). Mezofilinio proceso temperatūra eksperimentų metu siekė 33–35 oC, o deguonies koncentracija – 0,0–0,1 %. Laboratorinių eksperimentinių tyrimų pagrindu galima sukurti mažų matmenų periodinio veikimo bioreaktorius, kuriuos būtų įmanoma panaudoti nedideliame ūkyje arba privačiuose namuose, kur susidaro santykinai maži kiekiai mėšlo ir maisto atliekų.


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