The presence of foreign materials in an environment, leading to cause undesirable changes called pollution, pollution can occur in water, soil, and air. Many other types of pollutions include thermal, radioactive, and noise pollutions. Chemicals like heavy metals usually most pollutants effects on plants, animals, and human health, cadmium exist by the volcano, fires in the forest, has many bad effects on human health, targeting the kidney, liver, and vascular system. Chrome, lead and manganese, cases of irritation, problems in pulmonary works, stomach, small intestine, and attacking of reproductive system. Cobalt and nickel cause chromosomal efficiency defects. Many big cities in the world suffer from high pollutions. Therefore these chemicals must be kept in safe limits, industrial cities must be under governmental laws, periodical examinations for humans and workers.

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Many nations are seeing an increase in water pollution from dairy and cheese production due to the high organic and fat content in their waste products and the high temperature of their waste products, which elevates the water temperature and causes loss to ecosystem components. Reusing industrial wastewater that has been treated to guarantee no harm has been done to the environment is being hampered by a lack of water. This study compares the presence and absence of mixing in the anaerobic biological treatment of liquid waste for the cheese industry. To decrease heat exchange with the external environment, cube-shaped anaerobic reactors with dimensions of (30 x 30 x 30) cm and thick glass (10 mm) were utilized in this investigation. The temperature of the two reactors was 35°C, with the first reactor containing a mixture and the second reactor containing no mixture. Samples were obtained every five days and evaluated in the laboratory to monitor changes in the characteristics of liquid cheese waste during the treatment period, which was 30 days. The indicators (pH, EC, TDS, TSS, COD, and Alkalinity) were used, and a total of 72 tests were performed throughout the research period for each indicator. The results appeared that the first anaerobic reactor with the combination removed 95.1 % COD, whereas the second reactor that did not contain the mixture removed 94.1 % COD. The anaerobic reactors are very efficient in treating COD; the COD removal rate in the first reactor with the combination was 1.9 %, while the COD removal rate in the second reactor without mixing was 94.1 %. The increase in pH in the first and second reactors, followed by achieving the neutralization value, is proof of anaerobic reactor success. Total dissolved solids removal was achieved in anaerobic reactors in the first reactor (7.5 %) and peaked in the second reactor (17.83). The proportion of TSS removed in the first anaerobic reactor was 57.9%, and in the second reactor, it was 60.3 %. From all above can be concluded that the presence of mixing had a slight and negligible positive effect on the anaerobic reactors Keywords. Mixture, Liquid Waste, Cheese Industry, Anaerobic reactors.

Bioremediation of contaminated retaw dna soil is consider more cheap and least harmful way of removing xenobiotics in ecology, also Bioremediation, one of the most safe technology. Microorganisms which live everywhere can be considered as an option way out to solve the problem. Depending on the differences in the nutritional capacity of microorganisms, it can used as bioremediation for degradation, eradication, immobilization, or detoxification and change contaminants like heavy metal, hydrocarbons, oil, dye's, pesticides... This study introduce a summarize to the progress in the technology of bioremediation and the techniques that used in its application (such as phytoremediation, Microorganism and animal remediation…) and the application of these techniques on water pollutants such as eutrophication, petroleum spills, pesticide, heavy metals). The environmental relations between pollutants and microorganisms will be discussed in this review; this study will focus also on major impact, the disadvantage and the advantage of the bioremediation methods and it affect on the contaminants, environment as well as the biology of livings especially its effect on the health of human.

New composite: chitosan-iron keplerate (CHIK) as an adsorbent was prepared by the stirring of chitosan and iron keplerate at 40°C in acidic medium. This compound beside the free chitosan and iron keplerate were characterized using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy techniques. Chitosan film (CH), iron keplerate (IK) and CHIK composite were used as adsorbents for the removal of Cu(II) and Cd(II) ions from water following the batch equilibrium method at pH = 5.5 (adsorption studies were performed with respect to contact time and adsorbent mass). The adsorption of metal ion on the surface of compounds was carried out by the aid of atomic absorption spectrophotometer. The adsorption studies displayed that the adsorption capacity of the free chitosan or free iron keplerate was enhanced upon the composition. The isothermal behavior together with the adsorption kinetics of metal ions on CHIK composite as a function of the temperature and the initial mass of CHIK were also studied. The two well-known isotherm models (Langmuir and Freundlich equations) were applied to fit the experimental data. The results show that the experimental data of the metal ion adsorption correlates well with the Langmuir isotherm equation.