Food processing wastewater purification by microalgae cultivation associated with high value-added compounds production — A review

2019 ◽  
Vol 27 (12) ◽  
pp. 2845-2856 ◽  
Author(s):  
Shuhong Li ◽  
Shuang Zhao ◽  
Siliang Yan ◽  
Yiting Qiu ◽  
Chunfeng Song ◽  
...  
2004 ◽  
Vol 49 (5-6) ◽  
pp. 421-431 ◽  
Author(s):  
V. Ivanov ◽  
J.-Y. Wang ◽  
O. Stabnikova ◽  
V. Krasinko ◽  
V. Stabnikov ◽  
...  

The combination of microbial reduction and further microbial oxidation of iron was applied to the treatment of food-processing wastewater and recovery of ammonium. Fe2+ ions were formed by iron-reducing bacteria under anaerobic conditions. Ammonium was recovered by co-precipitation with negatively charged iron hydroxides produced during oxidation of Fe2+ by iron-oxidizing bacteria under microaerophilic conditions. The value-added by-product of this process can be used as a slowly released ammonium fertilizer.


2020 ◽  
Vol 27 (16) ◽  
pp. 20554-20564
Author(s):  
Le Thi Bao Ngoc ◽  
Tran Anh Tu ◽  
Luu Thi Thanh Hien ◽  
Duong Nhat Linh ◽  
Nguyen Tri ◽  
...  

1998 ◽  
Vol 30 (9) ◽  
pp. 1585-1602 ◽  
Author(s):  
D M W N Hitchens ◽  
J E Birnie ◽  
A McGowan ◽  
U Triebswetter ◽  
A Cottica

The authors use a method of matched-plant comparisons between food processing firms in Germany, Italy, Northern Ireland, and the Republic of Ireland to investigate the relationship between environmental regulation and company competitiveness across the European Union. Comparative competitiveness was indicated by measures of value-added per employee, physical productivity, export share, and employment growth. The cost of water supply (public or well), effluent treatment (in-plant treatment and/or sewerage system), and disposal of sludge and packaging were also compared. Total environmental costs in Germany, Italy, and Ireland were small: usually less than 1% of turnover. Compared with the Irish firms, German companies had relatively high environmental costs as well as productivity levels. There was, however, a lack of a clear relationship between company competitiveness and the size of regulation costs: in Ireland and Italy environmental costs were similar but German firms had much higher productivity; compared with German counterparts, Italian firms had lower environmental costs but higher productivity.


1993 ◽  
Vol 01 (01) ◽  
pp. 133-144 ◽  
Author(s):  
Erin Goh ◽  
Wee-Liang Tan

Biotechnology is one of the fields highlighted by the Economic Committee as an area of high value-added technology which could be developed in Singapore. The recommendation of the Economic Committee was that the venture capital industry be developed to aid in attracting young foreign technological firms to Singapore. Biotechnology includes the areas of pharmaceuticals, chemicals, food processing and agro-technology. A number of local biotechnology businesses have sprung up. This is an interesting phenomenon since biotechnology is difficult ground for small firms to be engaged in. It is usually associated with a long lag time between the development and the actual introduction of the product into the market-place, a need for large sums to be invested in research, and a short product life span, amongst other disadvantages. In an environment where enterprise is only currently being encouraged and entrepreneurship being nurtured, one would not have expected local entrepreneurs to venture into biotechnology. It would therefore be of interest to examine these businesses to see if there are any unique problems that they face by operating in Singapore. This paper proposes to examine the problems encountered by these local firms. Some of the problems ascertained through interviews with local firms concern financing and government funding, and availability of trained staff.


Author(s):  
Simple Sharma ◽  
Sahil Chaudhary ◽  
Archu Harchanda

: Rhododendron is a resourceful, evergreen shrub or a small tree with an ornate display of scarlet red or pale pink flowers that belongs to the family Ericaceae. Rhododendron plants are traditionally being used for the medicinal treatment of numerous human ailments like blood dysentery, headache, asthma, cough, stomachache, fever, inflammation, and fungal infections. Rhododendron also has economic, medicinal, and pharmacological importance. Rhododendron has been regarded as a rich source of secondary metabolites. Apart from aesthetic and sacred values, from past times, Rhododendron juice was prepared from the flowers to curb allergies, treat diabetes, and to deal with inflammations. Recent studies have shown several promising activities particularly relaxant, digestive enzyme, antioxidant, antimicrobial, antispasmodic, anticancer, and antagonistic effects. With the rapidly growing popularity of Rhododendron arboreum it is important to have a comprehensive reference for its nutritional benefits with the growing search for natural and health foods. This work aimed to review the recent advances in research carried out to date for purposive evaluation of nutritional quality and potential health benefits of Rhododendron arboreum for its utilization in food processing industries for composing novel value-added products, to achieve high consumer acceptability and health benefits.


2003 ◽  
Vol 47 (11) ◽  
pp. 189-194 ◽  
Author(s):  
Q.J. Yu ◽  
H. Xu ◽  
D. Yao ◽  
P. Williams

Biofilm (or attached growth) reactors can be effectively used to treat organic wastewater from various industries such as food processing industry. They have a number of advantages including high organic loading rates (OLRs) and improved operational stability. A flexible fibre biofim reactor (FFBR) has been developed for efficient and cost effective treatment of food processing wastewater. In the process, simple flexible fibre packing with a very high specific surface area is used as support for microorganisms. The COD removal efficiencies for a range of OLRs have been studied. The FFBR can support an increasingly high OLR, but with a corresponding decrease in the COD removal efficiency. Therefore, a two-stage FFBR was developed to increase the treatment efficiency for systems with high OLRs. Experimental results indicated that a high overall COD removal efficiency could be achieved. At an influent COD of about 2700 mg/L and an OLR of 7.7 kgCOD/m3d, COD removal efficiencies of 76% and 82% were achieved in the first and the second stage of the reactor, respectively. The overall COD removal efficiency was 96%. Therefore, even for wastewater samples with high organic strength, high quality treated effluents could be readily achieved by the use of multiple stage FFBRs.


2021 ◽  
Author(s):  
Mohammed Amouri ◽  
Fayrouz Kaidi ◽  
Amel Ounnar ◽  
Majda Aziza

Abstract This paper aims to study a new growth media using cheese whey and drainage water from agriculture for indigenous microalgae cultivation for value-added product generation. In this context, four combinations are studied beside the BG11 as reference, where BG11/Cheese whey (60/40, %v/v), drainage water 100%, drainage water/Cheese whey (60/40, % v/v), and Cheese whey 100 % have been used. Moreover, investigated parameters are biomass dry weight, pH variation, total chlorophyll and carotenoid content. Results showed that used growth media have a significant impact on microaglae culture, particularly in terms of cells growth, pigment content and pH variation. Moreover, the mixture BG11/Cheese whey (60/40, %v/v) shows the best impact for total chlorophylls and carotenoids content. Likewise, the mixture cheese whey/drainage water (60/40, %v/v) presents a positive effect on pigments content. The use of cheese whey and drainage water lead to enhance the biomass and pigment production. This study showed that using agro-industrial C-rich wastes and drainage water enhanced microalgae biomass and pigment content, thus contributing to pollution abatement. This will contribute to both reducing the cost of production and resources recycling.


Author(s):  
Joanna Smoluk-Sikorska

The objective of the paper is identifying the main organic food sales channels from processing companies and attempting to determine their influence on organic food processing. Recently, the dynamic development of organic farming and its market has been observed. Nevertheless, the elements of this market show a number of weaknesses. One of the weakest links of the studied market is the processing of organic food, which bears a high transaction cost resulting from, among others, low distribution development. The paper presents the results of an inquiry research carried out in the first half of 2019 on 55 organic food processors. Conducted research shows that the production structure of the examined companies, mainly focused on fruit, vegetable and cereal products, is only partly adjusted to consumer expectations, who increasingly prefer organic dairy and meat. The main distribution channel is sales to small retail outlets. Wholesale trade came second, although still too underdeveloped, to assure effective products flow from processors to retail. More than half of the studied processors sell their products abroad, mainly to EU countries, North America and Asia. However, it is low-processed products, which are mostly exported. This is an unfavourable phenomenon from a value-added generating perspective.


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