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The study adopted a descriptive survey design having a quantitative approach. The target population for this study was 9,320 real estate entrepreneurs comprised of 884, 95, 320 and 8,021 sourced from Softkenya directory, Kenya Developers Association, Estate Agent Registration Board and National Construction Authority respectively and having their registered offices in Nairobi, Nakuru, Kisumu and Eldoret. A sample size of 384 real estate entrepreneurs was selected and using a stratified random sampling procedure, them that participated in the study were identified and later served with online questionnaires using their emails. The primary data that was collected then analyzed descriptively and inferentially. Environmental risk management was found to a have a statistically significance effect on performance of commercial real estate entrepreneurial investments in Kenya. It further reveals that incomplete environmental analysis and unpredictable weather patterns were the two most frequent and severe sources of environmental risk. Political/legal risk management was however found not to have a statistically significant effect on the performance of the entrepreneurial investments. The study recommends the need by the concern authorities to enforce full compliance of environmental requirements before any entrepreneurial investment commences and throughout its life cycle and aided by real estate entrepreneurs and other stakeholders should further scrutinise all approvals that an entrepreneur requires with a view to determine the viability in the long run of the number of approvals as well as the number of

In microbial fuel cell technology, the substrate is consumed by microbes in anaerobic conversion of substrate to electricity. Bio-remediation of pollutants involves microbial environmental cleanup using green approach. The primary problems with pesticides are linked to the non-negligible proportion of the sprayed active ingredient that does not reach its intended target thereby contaminating environmental compartments persistently. The primary objective of this study was to assess the potential of microbial fuel cell technology in bio-remediation of lambda cyahlothrin, chlorpyrifos and malathion in Limuru loam soil. H-shaped double chamber microbial fuel cell was fabricated where the anodic chamber was loaded with 750 mL loam soil inoculated with 750 mL bio-slurry doped with 10 mL of 10 ppm lambda cyhalothrin, chlorpyrifos and malathion pesticide solutions. The cathodic chamber was loaded with 1500 mL distilled water. The setup was incubated for a 90 days retention time where voltage and current were recorded daily using a multi-meter. The degradation level was assessed using a GC-MS after sample extraction using standard QuEChERs method. The voltage generated from the pesticide doped loam soil showed an upward trend from day 0 to day 15 in lambda cyhalothrin and malathion and from day 0 to day 20 in chlorpyrifos and pesticide mixture after which constant readings were observed for three days with downward trends thereafter. The maximum generated voltage was 0.537 V, 0.571 V, 0.572 V and 0.509 V in chlorpyrifos, lambda cyhalothrin, malathion and pesticide mix (MCL) respectively. The bioremediation levels for chlorpyrifos and malathion were 65.80 % and 71.32 %, respectively while no detectable, lambda cyhalothrin was observed after day 60 of the study. This study concludes that bioremediation of lambda cyhalothrin, chlorpyrifos and malathion in Limuru loam soil can be achieved using microbial fuel cells.

The trace amounts of carbon dioxide and hydrogen sulfide in raw biogas lower its calorific value,cause corrosion and make it hard to compress biogas into the cylinder. Raw biogas was obtainedfrom anaerobic digestion of cow dung and market wastes. The gas was stored in tubes or urine bagbefore upgrading. Natural zeolite rocks, maize cobs, steel wire, desulphurizer, and worn-out tyreswere used as the upgrade materials. The composition of biogas was recorded before and afterupgrading using a GP180 portable biogas analyzer from Henan, China. The measured level of rawbiogas was 0.0227% H2S, >20% CO2 and 52-56% CH4. The most efficient upgrade materials werezeolite rocks with upgrade levels of 89–93% methane. The total removal using zeolite wasobserved to be 75% CO2 and 95.34% H2S. The morphological structures of zeolitic rocks accountfor its higher upgrading properties compared to other materials. In addition, the porosity in theserocks mean that CO2 and H2S were adsorbed resulting in high CH4 levels in the upgraded biogas.Other adsorbents showed upgrading properties with removal rates above 70% for both H2S andCO2. Keywords: Biogas, Upgrading, Natural zeolite, Bio-methane