background: olive oil wastewater  contains chemical contents and organic materials that are resistant to biodegradation.  the existence of phenolic inhibitor compounds, toxicity to microorganisms in wastewater treatment units, unpleasant odor, high biochemical oxygen demand (bod) and chemical oxygen demand (cod), high suspended solids, and compounds resistant to biodegradation in such wastewate...

The hemipteran (Insecta) diversity in the upper part of the Kerian River Basin was low with only 8 families and 16 genera recorded at 4 study sites from 3 rivers. Water bug composition varied among sampling sites (Kruskal-Wallis χ (2) = 0.00, p<0.05) but was not affected by wet-dry seasons (Z = 0.00, p>0.05). All recorded water parameters were weakly associated with generic abundance but the bi...

Coastal aquaculture can contribute to eutrophication of receiving waters. New technologies and improved management practices allow the aquaculture industry to be more sustainable and economically viable. Current practices, however, do not provide an additional use for effluent water. Nitrogen, phosphorus and other effluent compounds could be valuable plant nutrients. Inflow and effluent water f...

A new thermo-alkali-tolerant crude xylanase from Coprinellus disseminatus decreased kappa number by 34.38% and improved brightness and viscosity by 1.6 and 6.47% respectively after XE1-stage during prebleaching of Anthocephalus cadamba kraft-AQ pulp. At 2.4% chlorine demand, crude xylanase in a XECEHH (X= enzymatic prebleaching stage, E= extraction stage, C= chlorination stage, H= hypochlorite ...

Peternakan sapi perah mampu menghasilkan produk susu yang bernilai ekonomi tinggi namun juga berupa limbah baik cair (air), padat dan gas. Limbah cairan pada peternakan didominasi oleh air telah digunakan untuk pembersihan, sanitasi, pemanasan, pendinginan, pencucian lantai. Air langsung dibuang tanpa melalui pengolahan dapat berdampak kualitas lingkungan sekitar. Pencemaran di sekitar disebabk...

Abstract Microbial degradation is an important process for removing many organic chemicals from natural waters. The estimation of biodegradability which reach the aquatic environment necessary in assessing hazard associated with their use. Phenol has industrial applications and it finds its way into wastewater streams. It toxic to several biochemical reactions. However, biological transformatio...

Utilization of water in different parts of industrial life cycles brings a huge concern on environmental water and wastewater pollutions. In this research, environmental quality assessment of wastewater is studied using fuzzy logic. Fuzzy appliance is due to existance of statistical considerations (including standard deviations), various uncertainties, non-linearity and complexity of functions....

the purpose of this work was to test the efficiency of the treatment of wastewater by infiltrationunder laboratory conditions, to remove bacterial and organic load and to convert it to available nutrient for crop plants. in order to achieve this objective, polyvinyl chloride (pvc) columns of 133 cm of height were used. the columns were filled with sand and/or pozzolana and loaded with municipal...

We have developed a novel mediated biochemical oxygen demand (BOD) biosensor based on immobilized Bacillus subtilis (B. subtilis) on three-dimensional (3D) porous graphene-polypyrrole (rGO-PPy) composite. The 3D porous rGO-PPy composite was prepared using hydrothermal method following with electropolymerization. Then the 3D porous rGO-PPy composite was used as a support for immobilizing negativ...

This study presents a computational fluid dynamics (CFD) model of an aerated wastewater treatment oxidation ditch, taking into account gas-liquid flow, oxygen mass transfer and dissolved oxygen. Especially, the effect bubble size distribution (BSD) biochemical demand (BOD) on (DO) has been considered. Species transport modelling predicts DO BOD distribution. De-oxygenation local by is modelled ...