No abstract

The Watermelon rind powder (WMRP) as a natural source of fiber, minerals, amino acids and natural antioxidant compounds. This research was performed to evaluate the influence of addition of WMRP at different level (3, 6, 9 and 12%) from total formula of beef burger patties on chemical, physiochemical, microbiological and sensory characteristics of beef burger patties during frozen storage period at-18 ±2°C up to 90 days. The obtained results showed that the percentage of the WMR about 37.84 % from the total weight of watermelon fruit which can be considered as by-product for processing. However, the WMRP contained crude fiber (15.98%), total ash (12.55%), Na (515.44 mg/100g), Ca (311.22 mg/100g), Mg (298.61mg/100g), P (288.28 mg/100g), and K (130.04 mg/100g), while Fe (12.98mg/100g) and Zn (3.12 mg/100g) as macro and micro elements. Lysine, leucine, valine and isoleucine were the major essential amino acids (4.97, 4.71, 3.75 and 3.14 gm/100gm protein, respectively). Meanwhile, glutamic, arginine, Aspartic, Alanine and Glycine were the major non-essential amino acids (9.94, 8.91, 6.63, 6.11 and 5.76 gm/100gm protein, respectively). Moreover, the incorporation of WMRP into the beef burger patties as texturized soy substitute, caused to improvement of gross chemical composition as that increased both of fiber, total ash, total soluble carbohydrates content and decreased crude fat of beef burger patties, as well as the improvement of physiochemical quality criteria (pH value, WHC, shrinkage, TVN and TBA values) throughout frozen storage in comparison with control sample. In addition, WMRP inhibited the growth and activity of microbial, as well as reduction of lipid oxidation in tested prepared product. Also, beef burger patties containing the WMRP exhibited a good sensory properties and better acceptability, especially those contained 6 and 9 % WMRP, even after stored for 90 days under frozen condition. The present results are useful of used WMRP in fortification of meat products to improve the nutritionally and healthy safe.

A continuous laboratory scale model, simulating an oxidation pond system has been used to investigate the treatability of municipal wastewater and to evaluate the treated effluent for aquaculture. While the detention period was kept constant at 25 days, the organic loading rate fed to the system changed with changes in the BOD5 of the raw sewage and varied from 15.7 to 58.3 with an average value of 34.1 kg BOD5/ha/day. Monitoring of the system indicated remarkable improvement in the water quality of the treated effluent. BOD5 was around 26 mg O2/l. Average residual values of COD, suspended solids and phosphorus were 154, 65 and 3.2 mg/l respectively. A reduction up to 99.99% in coliform bacteria population has been recorded. However, residual values were still high. Tilapia fish grew healthily during the study period. Daily growth rate was 1.43% of the body mass. The productivity was 7.15 kg/ha/day. The corresponding extrapolated yield was 26.09 t/ha/yr which is considered to be a high yield as compared to published information.

A massive mixed algal growth may have many adverse effects on the water quality and causes acute problems, especially in different treatment steps for the production of drinking water. The effectiveness of drinking water treatment options for eliminating the nuisance created by River Nile water algae was the main objective of this study. The algal removal rate increased when using oxidants combined with alum-potassium permanganate; this was the most effective treatment combination for algal removal. When natural flocculant seeds of Moringa oleifera were used, the algal removal rate increased by more than 18% than that obtained by a chemical coagulant.

Carries out an investigation to evaluate the performance of the maturation pond, one of an aerated oxidation pond system at the Mit Mazah Sewage Treatment Plant (Daquahliya Governorate, Egypt), with respect to phytoplanktonic structure and nutrient elimination during different seasons. Details how the study collected composite water samples from the maturation pond at monthly intervals. Observes that there are substantial changes in the distribution pattern of the algal community structure during different seasons. Concludes that to obtain considerable algal biomass in the maturation pond, the pond system must be subjected to performance control.