Agricultural products/by-products are natural sorbent materials that possess capacity for removing contaminants including heavy metals from wastewaters and hence can be exploited as replacement of costly methods for wastewater treatment. The sorption of heavy metals onto these biomaterials is attributed to constituent's proteins, carbohydrates, and phenolic compounds that contain functional groups such as carboxylate, hydroxyl, and amine. Natural efficiency of these materials for removing heavy metals can be enhanced by treating them with chemicals. The present review emphasizes their use in developing eco-friendly technology for a large-scale treatment of wastewater.

Potential of biological materials for removing heavy metals from wastewater

Natural materials that are available in large quantities or certain waste from agricultural operations may have the potential to be used as low cost adsorbents, as they represent solid waste, widely available and are environmentally friendly after use it The aim of this research is to evaluate the applicability of using one of these locally available materials (sawdust) to improve the sewage effluent quality The sawdust, low cost locally available material and solid waste, was tested as biosorbent for the removal of biochemical oxygen demand (BOD5) from effluent sewage Adsorption of BOD5 onto this low-cost adsorbent was studied by continuous mode system The effects of initial BOD5 concentration, flow rate, bed height, particle size, activated carbon/sawdust ratios and pH on adsorption capacity were studied The experiments showed that the adsorption through the sawdust instead of commercial activated carbon was found to be very effective for the removal of BOD5, where the maximum removal percentage reached 8623%

https://www.uobabylon.edu.iq/uobcoleges/fileshare/articles/IMPROVING%20OF%20EFFLUENT%20SEWAGE%20BY%20TREATMENT%20WITH%20LOCAL%20MATERIALS.pdf

Improving of effluent sewage by treatment with local materials

Thesis study of the aerobic biological treatment of baker's yeast beet-molasses wastewater coming from the anaerobic effluent

3 Abstract: This investigation aims at studying the effect of interior structure of agro and non-agro materials for industrial wastewater treatment in the effluents quality occurring before and after industrial wastewater treatment as a filter media. Removing of oil and grease and wastewater impurities are the main target of this experimental work to reuse the effluent for irrigation purpose. In this study different fibers such as rice straw, luffa, sawdust, palm hemp, mixture of rice straw and luffa, LECA and clay were used in trickling filter systems as a filter media. The overall objective of this study is the evaluation of the capability of tested agro and non-agro filters in decreasing wastewater impurities. The results shows that the highest reduction in BOD (95.33%), COD(89.79%), TSS (96.6%), TDS (98.1%) and Oil/grease (99%) were recorded using the mixture of rice straw & luffa beds. The BOD, COD, TSS, TDS and oil/grease in the final effluent were 21, 84.8, 17, 0.15 and 0.31 mg/l respectively. Also the conductivity of the effluent decreased during stages of the treatment.

M. M. Kamal

Papers

Role Of Interior Structure Of Agro And Non-Agro Materials For Industrial Wastewater Treatment