Unfavorable fishy odour is an inevitable problem in aquatic products. In the present study, headspace solid-phase mi- croextraction gas chromatography mass spectrometry （HS-SPME-GC-MS） analysis of volatiles from unt...Unfavorable fishy odour is an inevitable problem in aquatic products. In the present study, headspace solid-phase mi- croextraction gas chromatography mass spectrometry （HS-SPME-GC-MS） analysis of volatiles from untreated samples and three deodorized samples （under the optimal conditions） ofPaphia undulata enzymatic hydrolysate revealed that the compounds contrib- uting to the distinctive odor were 1-octen-3-ol, n-hexanal, n-heptanal, 2,4-heptadienal, and 2,4-decadienal, whereas n-pentanal, n-octanal, n-octanol, benzaldehyde, 2-ethylfuran and 2-pentylfuran were the main contributors to the aromatic flavor. The deodoriz- ing effects of activated carbon （AC） adsorption, yeast extract （YE） masking and tea polyphenol （TP） treatment on a P. undulata en- zymatic hydrolysate were investigated using orthogonal experiments with sensory evaluation as the index. The following optimized deodorization conditions were obtained： AC adsorption （35 mg mL-1, 80℃, 40 rain）, YE masking （7 mgmL l, 45 ℃, 30 min） and TP treatment （0.4mgmL-l, 40℃, 50min）. AC adsorption effectively removed off-flavor volatile aldehydes and ketones. YE masking modified the odor profile by increasing the relative contents of aromatic compounds and decreasing the relative contents of aldehydes and ketones. The TP treatment was not effective in reducing the odor score, but it significantly reduced the relative content of alde- hydes while increasing that of alkanes. It is also notable that TP effectively suppressed trimethylamine （TMA） formation in a P. un- dulate hydrolysate solution for a period of 72 h.展开更多
The effect of treating algae-bearing water and induced odor by use of permanganate potassium composite （PPC） pre-oxidation was investigated, and was compared with the effect of treatments by pre-chlorination, perman...The effect of treating algae-bearing water and induced odor by use of permanganate potassium composite （PPC） pre-oxidation was investigated, and was compared with the effect of treatments by pre-chlorination, permanganate petassium pre-oxidation and simple coagulation. The results showed that simple coagulation and pre-chlorination were less effective in removing algae and its odor, whereas PPC pre-oxidation was the most effective in algae removal and deodorization. Upon oxidation with PPC, the cells of Oscillatoria agardhic were inactivated and some intra-cellular and extra-cellular components were released into the water, which may help the coagulation by their bridging effect. The efficient removal of algae by PPC pre-oxidation is believed to be the joint contribution of several mechanisms.展开更多
The test methods of deodorization fabric are studied in daily life. In view of different deodorization fabrics and source gases,the detector tube method and gas chromatography-flame ionization detector ( GC-FID ) meth...The test methods of deodorization fabric are studied in daily life. In view of different deodorization fabrics and source gases,the detector tube method and gas chromatography-flame ionization detector ( GC-FID ) method were chosen to test the deodorizing rates of fabric and the influencing factors on deodorization test were discussed. Through the two methods,the residual concentration of odorous substance after adsorption can be measured,and the deodorizing rates of deodorization fabric can be got by calculation. The results show that the two test methods are both appropriate for deodorization test of fabric.展开更多
With the acceleration of urbanization process and the continuous improvement of people's living standards in China, more and more attention has been paid to atmospheric environment and quality protection by people...With the acceleration of urbanization process and the continuous improvement of people's living standards in China, more and more attention has been paid to atmospheric environment and quality protection by people. Pungent odor emitted by the sewage treatment plant and the sewage pumping station directly affect the normal life and physical and mental health of staff and surrounding residents. Odor treatment has become an urgent problem in the field of environmental protection. This paper introduces the BCE biological deodorization technology, which can effectively prevent the expansion and spread of pollution and improve the local air quality.展开更多
Fishy odor has been a major limiting factor for the production and commercialization of loach.Herein,this study aims to develop an efficient deodorization process using single-factor experiments and Design-Expert resp...Fishy odor has been a major limiting factor for the production and commercialization of loach.Herein,this study aims to develop an efficient deodorization process using single-factor experiments and Design-Expert response surface methodology.The deodorization capability is evaluated using gas chromatography-ion mobility spec-troscopy(GS-IMS).As a result,the trehalose-sweet wine koji method was selected and the final optimal deodorization conditions were shown as follows:the compound ratio of trehalose to sweet wine koji was 51:1,the content of sweet wine koji was 0.10%,and the deodorization time was 33 min at 17℃.Under the conditions,the final trimethylamine content of loach was reduced by 89%.A total of 29 volatile compounds in loach samples before and after deodorization were identified by GC-IMS,including 11 aldehydes,8 alcohol,7 ketones,1 ester,and 2 olefins.Volatile compounds responsible for fish-like odor,such as hexanal,pentanal,heptanal,benzal-dehyde,octanal,nonanal,n-butanol,pentanol,and acetone,were decreased in intensity.Principal component and fingerprint analysis confirmed the deodorization effect of this process on loach was significant(p<0.05).Collectively,the study developed an efficient loach deodorization method,which will improve the quality of loach production.展开更多
基金supported by the Public Science and Technology Research Funds Projects of Ocean (No.201305018)the National Key Technology Research and Development Program for the 12th Five-Year Plan (No.2012BAD33B10)+3 种基金the National Natural Science Foundation of Guangdong, China (Nos. 2014A 030310351 and 2014A030310338)the Innovative Development of Marine Economy Regional Demonstration Projects of Guangdong (Nos.SZHY2012-B01-004 and GD2013-B03-001)the Science and Technology Planning Project of Guangdong Province, China (Nos.2013B 090800002 and 2015B090904003)the National Science Foundation for Young Scientists of China (No.31101271)
文摘Unfavorable fishy odour is an inevitable problem in aquatic products. In the present study, headspace solid-phase mi- croextraction gas chromatography mass spectrometry （HS-SPME-GC-MS） analysis of volatiles from untreated samples and three deodorized samples （under the optimal conditions） ofPaphia undulata enzymatic hydrolysate revealed that the compounds contrib- uting to the distinctive odor were 1-octen-3-ol, n-hexanal, n-heptanal, 2,4-heptadienal, and 2,4-decadienal, whereas n-pentanal, n-octanal, n-octanol, benzaldehyde, 2-ethylfuran and 2-pentylfuran were the main contributors to the aromatic flavor. The deodoriz- ing effects of activated carbon （AC） adsorption, yeast extract （YE） masking and tea polyphenol （TP） treatment on a P. undulata en- zymatic hydrolysate were investigated using orthogonal experiments with sensory evaluation as the index. The following optimized deodorization conditions were obtained： AC adsorption （35 mg mL-1, 80℃, 40 rain）, YE masking （7 mgmL l, 45 ℃, 30 min） and TP treatment （0.4mgmL-l, 40℃, 50min）. AC adsorption effectively removed off-flavor volatile aldehydes and ketones. YE masking modified the odor profile by increasing the relative contents of aromatic compounds and decreasing the relative contents of aldehydes and ketones. The TP treatment was not effective in reducing the odor score, but it significantly reduced the relative content of alde- hydes while increasing that of alkanes. It is also notable that TP effectively suppressed trimethylamine （TMA） formation in a P. un- dulate hydrolysate solution for a period of 72 h.
文摘The effect of treating algae-bearing water and induced odor by use of permanganate potassium composite （PPC） pre-oxidation was investigated, and was compared with the effect of treatments by pre-chlorination, permanganate petassium pre-oxidation and simple coagulation. The results showed that simple coagulation and pre-chlorination were less effective in removing algae and its odor, whereas PPC pre-oxidation was the most effective in algae removal and deodorization. Upon oxidation with PPC, the cells of Oscillatoria agardhic were inactivated and some intra-cellular and extra-cellular components were released into the water, which may help the coagulation by their bridging effect. The efficient removal of algae by PPC pre-oxidation is believed to be the joint contribution of several mechanisms.
文摘The test methods of deodorization fabric are studied in daily life. In view of different deodorization fabrics and source gases,the detector tube method and gas chromatography-flame ionization detector ( GC-FID ) method were chosen to test the deodorizing rates of fabric and the influencing factors on deodorization test were discussed. Through the two methods,the residual concentration of odorous substance after adsorption can be measured,and the deodorizing rates of deodorization fabric can be got by calculation. The results show that the two test methods are both appropriate for deodorization test of fabric.
文摘With the acceleration of urbanization process and the continuous improvement of people's living standards in China, more and more attention has been paid to atmospheric environment and quality protection by people. Pungent odor emitted by the sewage treatment plant and the sewage pumping station directly affect the normal life and physical and mental health of staff and surrounding residents. Odor treatment has become an urgent problem in the field of environmental protection. This paper introduces the BCE biological deodorization technology, which can effectively prevent the expansion and spread of pollution and improve the local air quality.
基金supported by the Freshwater Aquaculture Inno-vative Team Construction Project of Modern Agricultural Industrial Technology System of Hebei Province(HBCT2018180206)the Key Research and Development Plan Project of Hebei Province(21327107D).
文摘Fishy odor has been a major limiting factor for the production and commercialization of loach.Herein,this study aims to develop an efficient deodorization process using single-factor experiments and Design-Expert response surface methodology.The deodorization capability is evaluated using gas chromatography-ion mobility spec-troscopy(GS-IMS).As a result,the trehalose-sweet wine koji method was selected and the final optimal deodorization conditions were shown as follows:the compound ratio of trehalose to sweet wine koji was 51:1,the content of sweet wine koji was 0.10%,and the deodorization time was 33 min at 17℃.Under the conditions,the final trimethylamine content of loach was reduced by 89%.A total of 29 volatile compounds in loach samples before and after deodorization were identified by GC-IMS,including 11 aldehydes,8 alcohol,7 ketones,1 ester,and 2 olefins.Volatile compounds responsible for fish-like odor,such as hexanal,pentanal,heptanal,benzal-dehyde,octanal,nonanal,n-butanol,pentanol,and acetone,were decreased in intensity.Principal component and fingerprint analysis confirmed the deodorization effect of this process on loach was significant(p<0.05).Collectively,the study developed an efficient loach deodorization method,which will improve the quality of loach production.
