Amicable Knowledge Solution University

Satna, India

Amicable Knowledge Solution University

Satna, India
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Awasthi M.K.,Hong Kong Baptist University | Awasthi M.K.,Amicable Knowledge Solution University | Awasthi M.K.,Northwest University, China | Selvam A.,Hong Kong Baptist University | And 3 more authors.
Bioresource Technology | Year: 2017

The objective of this work was to isolate a novel thermophilic bacterial strain and develop a bacterial consortium (BC) for efficient degradation oily food waste. Four treatments were designed: 1:1 mixture of pre-consumption food wastes (PrCFWs) and post-consumption food wastes (PCFWs) (T-1), 1:2 mixture of PrCFWs and PCFWs mixture (T-2), PrCFWs (T-3) and PCFWs (T-4). Equal quantity of BC was inoculated into each treatment to compare the oil degradation efficiency. Results showed that after 15. days of incubation, a maximum oil reduction of 65.12. ±. 0.08% was observed in treatment T-4, followed by T-2 (55.44. ±. 0.12%), T-3 (54.79. ±. 0.04%) and T-1 (52.52. ±. 0.02%), while oil reduction was negligible in control. Results indicate that the development of oil utilizing thermophilic BC was more cost-effective in solving the degradation of oily food wastes and conversion into a stable end product. © 2017 Elsevier Ltd.


Awasthi M.K.,Northwest University, China | Awasthi M.K.,Amicable Knowledge Solution University | Li J.,Northwest University, China | Kumar S.,Indian National Environmental Engineering Research Institute | And 6 more authors.
Bioresource Technology | Year: 2017

The aim of the study was to evaluate the bacterial and fungal diversities of 18contrastivecomposts applied with 17 different sources mad biochars applied treatments using 16S rRNA and 18S rDNA technology, while T-1 used as a control. The results showed that bacterial species of the phyla Actinobacteria, Proteobacteria and Chloroflexi, and fungi of the phylum Ascomycota and Basidiomycota were pre-dominant among the all treatments. The bacterial genus Subgroup_6_norank, Nocardioides, Pseudonocardia, Sphingomonas, Solirubrobacter and RB41_norank are first time identified in composting ecosystem. In addition, the fungal genus Ascomycota_unclassified, Aspergillus, Penicillium, Pleosporales_unclassified and Herpotrichlellacease_unclassified ubiquitous among the all compost. The Shannon and refraction-curve biodiversity indices showed a clear heterogeneity among all the treatments, which could be due to isolation of new genera in this system. Finally, the principal component analysis of the relative number of sequences also confirmed that bacterial and fungal population indiscriminate in different sources mad biochar applied treatments. © 2017 Elsevier Ltd.


Awasthi M.K.,Northwest University, China | Awasthi M.K.,Amicable Knowledge Solution University | Wong J.W.C.,Hong Kong Baptist University | Kumar S.,Indian National Environmental Engineering Research Institute | And 7 more authors.
Bioresource Technology | Year: 2017

The aim of this work was to study the biodegradation of food waste employing thermostable α-amylase and cellulase enzymes producing bacteria. Four potential isolates were identified which were capable of producing maximum amylase and cellulase and belong to the amylolytic strains, Brevibacillus borstelensis and Bacillus licheniformis; cellulolytic strains, Bacillus thuringiensis and Bacillus licheniformis, respectively. These strains were selected based on its higher cell density, enzymatic activities and stability at a wide range of pH and temperature compared to other strains. The results indicated that 1:1 ratio of pre and post consumed food wastes (FWs) were helpful to facilitate the degradation employing bacterial consortium. In addition, organic matter decomposition and chemical parameters of the end product quality also indicated that bacterial consortium was very effective for 1:1 ratio of FWs degradation as compared to the other treatments. © 2017 Elsevier Ltd.


Xiao R.,Northwest University, China | Xiao R.,Louisiana State University | Awasthi M.K.,Northwest University, China | Awasthi M.K.,Amicable Knowledge Solution University | And 6 more authors.
Bioresource Technology | Year: 2017

In recent years, considerable studies have been devoted to investigating the effect of biochar application on organic solid waste composting. This review provides an up-to-date overview of biochar amendment on composting processes and compost quality. Biochar production, characteristics, and its application coupled with the basic concepts of composting are briefly introduced before detailing the effects of biochar addition on composting. According to recent studies, biochar has exhibited great potential for enhancing composting. It is evident that biochar addition in composting can: (1) improve compost mixture physicochemical properties, (2) enhance microbial activities and promote organic matter decomposition, (3) reduce ammonia (NH3) and greenhouse gas (GHG) emissions, and (4) upgrade compost quality by increasing the total/available nutrient content, enhancing maturity, and decreasing phytotoxicity. Despite that, further research is needed to explore the mechanism of biochar addition on composting and to evaluate the agricultural and environmental performances of co-composted biochar compost. © 2017 Elsevier Ltd.


Wang Q.,Northwest Agriculture and Forestry University | Awasthi M.K.,Northwest Agriculture and Forestry University | Awasthi M.K.,Amicable Knowledge Solution University | Ren X.,Northwest Agriculture and Forestry University | And 4 more authors.
Environmental Science and Pollution Research | Year: 2017

In this study, greenhouse pot experiment was carried out to investigate the Cu and Zn mobility and their accumulations in pakchoi (Brassica chinensis L.) and Chinese cabbage (Brassica rapachinensis L.) growth in Ca-bentonite-pig manure co-compost (CBC)–soil system during three consecutive planting. Five composts (0, 2.5, 5, 7.5, and 10% Ca-bentonite-pig manure co-composts) amended soil with 5% (w/w) application rate and compared to control without any additive. The results showed that the addition of CBC increased the biomass and chlorophyll content of pakchoi, and the maximum overall yield was found in 7.5% CBC treatment (12.89 ± 0.25 g), while when compared with the 0% CBC (15.89 ± 0.52 g) treatment, the Ca-bentonite amendment slightly decreased the Chinese cabbage yield (14.65 ± 0.11–15.41 ± 1.97 g). Additionally, compared to the 0% CBC treatment (11.81 ± 0.57–25.75 ± 0.89 mg/kg), the Ca-bentonite amendments showed a positive effect on restraining the diethylene triamine penta-acetic acid Zn mobilization (4.43 ± 0.41–12.48 ± 2.54 mg/kg) in pakchoi and Chinese cabbage; beside this, no obvious effect was observed on DTPA-Cu. Furthermore, there were great potential impacts for plant-available Zn in Ca-bentonite amended treatments during the consecutive planting, which decreased the content of Zn in plants. DTPA extraction results showed significantly higher Cu and Zn contents in compost–soil mixture, but its availability for grown plant was not confirmed during the consecutive planting, because of the consecutive decrease heavy metals contents in crops. Overall, the Ca-bentonite could be a useful additive for restricting the heavy metal mobility and increase the pakchoi yield. © 2017 Springer-Verlag Berlin Heidelberg


Awasthi M.K.,Northwest Agriculture and Forestry University | Awasthi M.K.,Amicable Knowledge Solution University | Zhang Z.,Northwest Agriculture and Forestry University | Wang Q.,Northwest Agriculture and Forestry University | And 7 more authors.
Bioresource Technology | Year: 2017

In this work, the 16S rRNA gene was used to compare the bacterial diversity at thermophilic stage of six different biochar dosage applied SS composting, while compared without biochar added treatment or control. The results showed that biochar amendment affected the structure and succession of bacteria diversity in different ways, and there were 35 prominent genera among all samples displayed in the species abundance heat-map. Among them, Proteobacteria, Firmicutes and Chloroflexi were the main phyla found in genomic libraries from each treatment. The most abundant common genera among the all treatments were Pseudomonas, T78, Acinetobacter and Ureibacillus. In addition, Krona, principal component analysis and β-diversity indices showed a clear difference in bacterial diversity among the biochar added and control treatments. Finally, our results suggested that Planomicrobium, Paracoccus, Agrobacterium and Devosia could be considered as possible biomarkers symbolic of the thermophilic phase during SS composting. © 2017 Elsevier Ltd


Wang Q.,Northwest Agriculture and Forestry University | Awasthi M.K.,Northwest Agriculture and Forestry University | Awasthi M.K.,Amicable Knowledge Solution University | Zhao J.,Northwest Agriculture and Forestry University | And 5 more authors.
Bioresource Technology | Year: 2017

The present study aimed to investigate the effect of different concentrations (0%, 2.5%, 5.0%, 7.5% and 10.0%) of medical stone (MS) on the lignocellulose degradation and organic matter humification during pig manure (PM) composting. The results indicated that the addition of MS drastically promoted the organic carbon and lignin degradation. Compared to the control, the decomposition rate of hemicellulose and cellulose was increased by 9.64–27.08% and 2.11–12.07% in MS added treatments. Meanwhile, MS amendment significantly improved the humification of composting process, and the humic acid contents in MS added treatments were 5.58–9.75% higher than control. The FTIR and synchronous fluorescence spectra indicated that the aromatization of final compost was promoted with increasing the MS amount. In addition, the application of MS blended composts could significantly improve the biomass and chlorophyll content of pachoi (Brassica chinensis L.). Due to the effective performance of MS, the 10.0% MS was suggested for PM composting. © 2017 Elsevier Ltd


Wang M.,Northwest Agriculture and Forestry University | Awasthi M.K.,Northwest Agriculture and Forestry University | Awasthi M.K.,Amicable Knowledge Solution University | Wang Q.,Northwest Agriculture and Forestry University | And 5 more authors.
Bioresource Technology | Year: 2017

In this study, the pilot scale co-composting of sewage sludge (SS) + wheat straw amended with 10% (dry weight ratio of basis) of three different additives (zeolite, Ca-bentonite and medical stone) was conducted for 56 days to evaluate the greenhouse gases (GHGs) and nitrogen conservation efficacy and its correlation with analyzed physicochemical, gaseous and biological parameters. The results indicated that all of three additives could adequately buffer pH, considerably increase temperature, and enhance organic matter degradation as well as reduce ammonia and GHGs emission. Particularly, zeolite amended treatment showed the maximum reduction of CH4 emission by 88.45% and less amount of nitrogen loss by 28.80%, meanwhile reduced the maturity period by 2 weeks. In addition, the redundancy analysis was confirmed most significant relationship between biological, GHGs, bacterial community and nutrients concentration in 10% zeolite applied treatment than other treatments. The result suggested 10% zeolite could be a suitable additive to improve the quality of sewage sludge composting. © 2017 Elsevier Ltd


Awasthi M.K.,Regional Office | Awasthi M.K.,Amicable Knowledge Solution University | Awasthi M.K.,Hong Kong Baptist University | Pandey A.K.,Madhya Pradesh Private Universities Regulatory Commission | And 4 more authors.
Bioresource Technology | Year: 2014

Influence of fungal consortium and different turning frequency on composting of organic fraction of municipal solid waste (OFMSW) was investigated to produce compost with higher agronomic value. Four piles of OFMSW were prepared: three piles were inoculated with fungal consortium containing 5. l each spore suspensions of Trichoderma viride, Aspergillus niger and Aspergillus flavus and with a turning frequency of weekly (Pile 1), twice a week (Pile 2) and daily (Pile 3), while Pile 4 with weekly turning and without fungal inoculation served as control. The fungal consortium with weekly (Pile 1) turning frequency significantly affected temperature, pH, TOC, TKN, C/N ratio and germination index. High degradation of organic matter and early maturity was observed in Pile 1. Results indicate that fungal consortium with weekly turning frequency of open windrows were more cost-effective in comparison with other technologies for efficient composting and yield safe end products. © 2014 Elsevier Ltd.


Awasthi M.K.,Amicable Knowledge Solution University | Awasthi M.K.,Rani Durgavati University | Pandey A.K.,Madhya Pradesh Private Universities Regulatory Commission | Bundela P.S.,Regional Office | Khan J.,Rani Durgavati University
Bioresource Technology | Year: 2015

The effect of various bulking waste such as wood shaving, agricultural and yard trimming waste combined with organic fraction of municipal solid waste (OFMSW) composting was investigated through assessing their influence on microbial enzymatic activities and quality of finished compost. All three piles of OFMSW with different bulking waste were inoculated with microbial consortium. The results revealed that OFMSW combined with wood shaving and microbial consortium (Phanerochaete chrysosporium, Trichoderma viride and Pseudomonas aeruginosa) were helpful tool to facilitate the enzymatic activity and shortened composting period within 4. weeks. Maximum enzymatic activity were observed in pile 1 and 3 during the first 3. weeks, while in pile 2 relatively very low. But phosphatase activity was relatively higher in all piles until the end of the process. Maturity parameters of compost quality also favored the pile 1 as the best formulation for OFMSW composting. © 2015 Elsevier Ltd.

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