Solid Biogas Research Articles

Diet rather than temperature determines the biochemical composition of the ragworm Hediste diversicolor (OF Müller, 1776) (Annelida: Nereidae)

The polychaete Hediste diversicolor is known to recycle side streams from aquaculture and biogas production. We conducted a feeding experiment to evaluate whether rearing temperature or mixtures of these two side streams enhances biomass production and fatty acid composition. We reared H. diversicolor along a 5-temperature gradient ranging from 5.8 °C to 17.1 °C and a 4-step gradient form 100% aquaculture sludge to 100% solid biogas digestate. Formulated fish feed served as a control diet. Polychaetes increased growth rate with increasing temperature, ranging from 0.01 at 5.8 °C to 0.14 at 17.1 °C, while survival was inversely affected by temperature with 100% survival at 5.8 °C and 70% survival at 17.1 °C. Diet had a less pronounced effect on polychaete survival, and no significant effect on growth rates. Contrasting to growth, the fatty acid composition of the polychaetes was not affected by temperature but was highly influenced by diet, as polychaetes did not cluster by rearing temperature but by the diets they received. In conclusion, H. diversicolor can be utilized as a recycler of aquaculture and biogas side streams, and production temperature can be optimized for growth without compromising fatty acid composition and quality of the polychaetes.

Towards Functional Insect Feeds: Agri-Food By-Products Enriched with Post-Distillation Residues of Medicinal Aromatic Plants in Tenebrio molitor (Coleoptera: Tenebrionidae) Breeding.

Sustainability, circular economy and alternative production systems are urgent imperatives for humanity and animal husbandry. Unless wasted, agri-food by-products can offer a promising source of high value. We evaluated the effect of rice bran (RB), corncob (CC), potato peels (PP), solid biogas residues (BR), and olive-oil processing residuals (OR), as alternative substrates to wheat bran (WB as control), on the growth and nutritional value of Tenebrio molitor during its breeding for animal feeds and/or human consumption. Innovation-wise, we further investigated the substrate supplementation (0, 10, 20%) with post-distillation residues of Mediterranean aromatic-medicinal plants (MAPs: lavender, Greek oregano, rosemary, olive; 1:1:1:1 ratio). Tenebrio molitor larvae (TML) were reared in all the studied substrates, and TML and diets’ proximate and fatty acid compositions as well as total phenol and flavonoid content and antioxidant potential were assessed using standard procedures. After statistical analysis of correlations, we observed that CC promoted oviposition and progeny survival; larval weight and dry matter were positively affected mainly by dietary energy and fat content; number of TML and/or larval weight increased using 10% MAPs inclusion in WB, RB and OR or RB, OR, BR and PP, respectively, which did not affect protein content; TML fatty acid composition decreased the content of saturated ones and increased that of mono-unsaturated ones; MAPs residues had an apparent favorable impact on total phenolic content and antioxidant activity of each substrate, with RB displaying the highest capacity and content. These findings indicate that alternative substrates can be exploited and their enrichment with natural phenolics is able to influence T. molitor growth, offering highly beneficial and nutritional value.

Effect of organic fertilizers on CH4 and N2O production from organic paddy field

Organic fertilizer potentially results in healthy soils and sustainable agriculture. Organic fertilizer is a nutrients source in organic farming. Organic fertilizer application affects CH4 and N2O production. CH4 and N2O production affect increasing greenhouse gas emission concentration, global warming and further climate change. This study aimed to determine organic fertilizers effect on CH4 and N2O production from organic paddy fields. Five types of organic fertilizer namely mixed compost (MC), cow manure (CM), cow manure compost (CMC), straw compost (SC) and solid biogas waste (SBW) were added to paddy soil and determined CH4 and N2O production. The result showed that CH4 and N2O production were affected by organic fertilizer addition. CH4 production was 109.52 mg kg soil-1 day-1 and N2O production was 1.70 mg kg soil-1 day-1. The lowest production of both gasses was in SBW treatment. CH4 production was 177.21 mg kg soil-1 day-1 and N2O production was 2.80 mg kg soil-1 day-1. The highest was in soil with cow manure (CM) treatment. CH4 and N2O production correlated positively with organic carbon and Carbon and Nitrogen ratio (C/N) of organic fertilizers (p < 0.05). Application of solid biogas waste (SBW) with drainage treatment on 10th day and composting are the best effort to mitigate CH4 and N2O production.

Dynamics of nutrient availability in tomato production with organic fertilisers

ABSTRACT In greenhouse organic horticulture there is a great challenge in supplying the crop with adequate amounts of nutrients at the right stage of crop development. This has been identified as one of the main factors compromising yields in organic systems as compared with conventional hydroponic systems based on the use of synthetic fertilisers. In organic systems, the supply of nutrients is reliant on microbial degradation of organic complexes, a process that is dependent on factors such as temperature, soil water content and pH. Different organic fertilisers will also have different characteristics with respect to mineralisation of nutrients. In order to evaluate different strategies for organic fertilisation in long-term greenhouse crops such as high-wire tomato crops, an experiment with three different treatments was performed. The different strategies evaluated were one based on blood meal, kalimagnesia and the commercial product Baralith Enslow (composed of clay and ground lucerne), one with poultry manure and kalimagnesia, and one with solid biogas digestate and kalimagnesia. A five-month tomato crop was grown. Lysimeter samples were taken from the growing media biweekly for monitoring of plant available nutrients. The results suggested that nitrogen was likely to have been the limiting factor for plant growth, however, the biogas digestate delivered mineralised nitrogen throughout the experiment.

EVALUATION OF SOLID BIOGAS FERMENTATION RESIDUE AS A SOURCE OF ORGANIC FERTILIZER ON BERSEEM CLOVER (Trifolium alexandrinum L.)

The study was carried out in order to investigate the effects of 5 different solid biogas fermentation residue doses (0, 0.5, 1, 2 t da-1) on the yield and quality of berseem clover (Trifolium alexandrinum L.) in Aydın province. In the study, no chemical fertilizers were applied and the harvest was carried out at 50-100% flowering time. In the study, hay yield (kg da-1), leaf / stem ratio (%), Ca (%), Mg (%), crude ash content (%), Acid Detergen Fiber (ADF (%)), Neutral Detergent Fiber (NDF (%)), crude protein content (%) parameters are measured. Crude protein yield yield (kg da-1) and relative feed value calculated after the measurements. According to the results, in 2016-2018 years average hay yield was obtained from 552.98 kg da-1 of 1.5 t da-1 solid biogas residue application. In terms of crude protein content, the highest value in 2016-2018 years was found as 22,88% in 1 t da-1 fertilizer application. As a result of the study, it was found that solid biogas waste had positive effects on feed efficiency and quality when all parameters were evaluated. Especially 1 t da-1 and 1.5 t da-1 solid biogas residue fertilizer doses were determined to come to the fore in the berseem clover.

Katı Biyogaz Atığı Uygulamalarının Sorgum ve Sorgum x Sudanotu Melezi Bitkilerinde Yem Verimi ve Kalitesi Üzerine Etkileri

Dünyada artış gösteren su sıkıntısı ve çevre kirliliği insanları üretim yaparken alternatif seçeneklere doğru yönlendirmektedir. Bu alternatiflerin özellikle çevreci ve sürdürülebilir olması hem bizi hem de doğayı daha sağlıklı kılacaktır. Bu kapsamda su kullanım etkinliği en yüksek düzeyde olan bitkilerden biri olan sorgum ve katı biyogaz fermentasyon atığı gübresi çalışmanın ana materyallerini oluşturmaktadır. Çalışmada sorgum bitkisinin (Sorghum bicolor L. Moench) Rox çeşidi kullanılırken sorgum-sudanotu melezinde (Sorghum bicolor x Sorghum sudanense Mtapf) Gözde-80 çeşidi kullanılmıştır. Çalışma 2018 yaz üretim sezonunda Aydın ekolojik koşullarında yürütülmüş ve 5 farklı katı biyogaz dozu (0, 500, 1000, 1500, 2000 kg da-1) uygulaması dışında herhangi bir kimyasal gübreleme uygulanmamıştır. Araştırma 3 tekerrürlü olarak yürütülmüş olup Nisan ayı içinde ekimi Ağustos ayında da biçim işlemi gerçekleştirilmiştir. Çalışma neticesinde kuru ot verimi, bitki boyu, yaprak sayısı, gibi verim ve verim öğelerinin yanında ham protein oranı, ADF, NDF ve ADL gibi kalite parametreleri de incelenmiştir. Bu ölçümlerin ardından ham protein verimi ve nispi yem değeri hesaplamaları gerçekleştirilmiştir. Sonuçlar incelendiğinde her iki bitkinin de gübre dozlarına tepkileri farklı olurken gübre uygulamalarının olumlu etkileri olduğu ancak belirli bir doz önerisinde bulunulamayacağı görülmektedir.

Potential of the polychaete Hediste diversicolor fed on aquaculture and biogas side streams as an aquaculture food source

AEI Aquaculture Environment Interactions Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections AEI 11:551-562 (2019) - DOI: https://doi.org/10.3354/aei00331 Potential of the polychaete Hediste diversicolor fed on aquaculture and biogas side streams as an aquaculture food source Haiqing Wang1,2,*, Andreas Hagemann2, Kjell Inge Reitan1, Jørgen Ejlertsson3, Håvard Wollan4, Aleksander Handå2, Arne M. Malzahn2 1Norwegian University of Science and Technology, Department of Biology, 7491 Trondheim, Norway 2SINTEF Ocean, 7465 Trondheim, Norway 3Scandinavian Biogas, 58273 Linköping, Sweden 4Biokraft AS, 7042 Trondheim, Norway *Corresponding author: haiqing.wang@ntnu.no ABSTRACT: We evaluated the potential of the marine bristleworm Hediste diversicolor (Polychaeta) to recycle side streams from aquaculture and biogas production. Polychaetes were fed along a gradient from pure aquaculture sludge (SS) to pure solid biogas digestate (SBD) in 33% steps, with a positive control reared on fish feed (FF). Worms fed with FF showed the highest specific growth rate; there were no significant differences in growth rates among worms fed pure SS, pure SBD or their mixtures. While the diets differed significantly in protein concentrations, the worms showed comparable protein concentrations at the end of the 30 d rearing period (42-47% of dry weight). Lipid content in the worms was positively correlated with that in their diets. The worms on mixtures of SS and SBD with different ratios showed similar amino acid profiles. Fatty acid (FA) composition in the polychaetes reflected diet, where increased fractions of SBD resulted in an increase in long-chain polyunsaturated FAs, such as arachidonic (C20:4 n-6) and eicosapentaenoic (C20:5 n-3) acids, whereas increased ratios of SS increased docosapentaenoic (C22:5 n-3) and docosahexaenoic (C22:6 n-3) acids. These results suggest that polychaetes can recycle organic nutrients from aquaculture and biogas side streams into high-quality proteins and lipids, and can potentially serve as ingredients for aquafeeds. KEY WORDS: Recycling · Salmon culture · Aquaculture waste · Solid biogas digestate · Aquafeed Full text in pdf format Supplementary material PreviousNextCite this article as: Wang H, Hagemann A, Reitan KI, Ejlertsson J, Wollan H, Handå A, Malzahn AM (2019) Potential of the polychaete Hediste diversicolor fed on aquaculture and biogas side streams as an aquaculture food source. Aquacult Environ Interact 11:551-562. https://doi.org/10.3354/aei00331 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in AEI Vol. 11. Online publication date: November 14, 2019 Print ISSN: 1869-215X; Online ISSN: 1869-7534 Copyright © 2019 Inter-Research.

Study of the performance of biogas production by mixed fermentation of cow dung, deer manure, and mushroom fungus

AbstractAnaerobic digestion (AD) of livestock and poultry manure to produce biogas can not only improve environmental problems, but also effectively utilize waste. In order to maximize the resource utilization of livestock and poultry manure, the AD experiments of mixing cow dung, deer manure, and mushroom fungus were carried out. The changes of AD biogas production (daily and cumulative biogas production), CH4 content, volatile fatty acids (VFAs), pH at different temperatures (20, 35, and 50°C), and mixing ratios were studied, and the optimum reaction conditions were discussed. Results show that with the increase in temperature the biogas production rate and the cumulative biogas production at each proportions increase. At 20°C, the amount of biogas generated is very small. Under different proportions of raw materials, the cumulative biogas production first increased and then decreased. The best biogas production is at a temperature of 50°C and a proportion of cow dung, deer manure, and mushroom fungus is 0.3:0.4:0.3. The unit total solid biogas production rate reached 0.23 L·g−1. The mixed fermentation of livestock manure and mushroom fungus made up for the inadequacy of its separate fermentation performance and was also an effective method to improve the biogas rate and comprehensive utilization rate of livestock manure. The results of this study are of great significance in promoting the utilization of livestock and poultry manure.

ЭФФЕКТИВНОСТЬ ПРИМЕНЕНИЯ ТВЕРДЫХ ПРОДУКТОВ БИОГАЗОВОЙ УСТАНОВКИ НА НЕФТЕЗАГРЯЗНЕННЫХ ПОЧВАХ

The article contains the results of scientific research on the use of solid products from the processing of poultry manure in a biogas plant of OOO NPO Agrobiogaz, St. Petersburg (hereinafter referred to as TBU or solid bio-fertilizer) on soils contaminated with oil products. Solid biogas plant processing products are a non-traditional type of organic fertilizer. The chemical composition of biofertilizer was determined: 1 ton of a natural substance contains on average 16,5 kg/ton of total nitrogen, 20 kg/ton of total phosphorus and about 16 kg/ton of total potassium, as well as trace elements. Scientific studies have shown that the use of bio-fertilizer on artificially polluted soils weakens their toxic effect, and with an increase in the dose of bio-fertilizers, it consistently increases the yield of barley. The results of scientific studies have shown that solid products of a biogas plant can be effectively used as improver on oil-polluted soils.

Integrating the Bottom Ash Residue from Biomass Power Generation into Anaerobic Digestion To Improve Biogas Production from Lignocellulosic Biomass

The bottom ash residue derived from biomass power generation was characterized by alkalinity and contained about 35 mineral elements, which offered a possibility to improve anaerobic digestion of lignocellulose biomass via providing mineral nutrients for microorganisms and alkali conditions for pretreatment. Technically, bottom ash was mixed with distilled water to prepare the extracting solution for this investigation. To check the function as a nutrient provider of bottom ash, the increased bottom ash loading from 0.37 to 2.96% was employed to achieve the extracting solutions with different concentrations of mineral elements. Rice straw was mixed with these extracting solutions for 7 days and then employed for the anaerobic digestion in batch. Results indicated that 314.38 mL/g of total solid biogas was achieved by 0.37% bottom ash, which was 21.2 and 15.8% higher than that of the blank and 0.12% NaOH (equivalent alkalinity of 0.37% bottom ash), respectively, proving that bottom ash substantially functi...

Pengaruh cairan lumpur organik unit gas bio terhadap persentase kandungan bahan organik dan protein kasar padatan lumpur organik unit gas bio

The purposes of this study were to analyze: 1) the constitution and characteristics of sludge, solid sludge and sludge flour derived from Biogas Unit (BGU); 2) the influence of organic sludge liquid on the percentage of organic and crude protein content of the BGU organic sludge (BGUOS). The methods used in the study were observation and randomized controlled trial experiments. Data derived from field study were analyzed descriptively while data derived from experiments were analyzed using variance analysis. Differences were shown using the smallest significance- p test with CI 95%. The results showed that organic sludge constitution were odious, the organic sludge was clotting after drying process. In addition it became powder as soft as bran after dried, powdered and brooded. The experiment showed that the composition of BGUOS liquid gave influence to the amount of organic content and crude protein in the powder constitution of BGUOS. The fifth treatment brought the optimum percentage of the organic content and crude protein. The research concluded that BGUOS constitution was detestable in its form of sludge, however it could be transformed into bran constitution by drying and brooding treatment. The optimum amount of organic content and crude protein of BGUOS bran were gained by using 5 th treatment. The research suggest it is necessary to maintain BGUOS on the basis of local technology and to study the application of BGUOS solid powder or bran as fish and livestock feed. Keywords : Solid Biogas Unit Organic Sludge (Solid BGUOS), CP