This research studied the factors that affect the efficiency of phosphate reduction in the wastewater of the washing process with CaCO3 and CaO produced from eggshell and mussel shell. The study found that the optimum condition for adsorption when using CaCO3 from eggshell is to adjust the pH to be equal to 10 take 15 minutes to absorb and add 1 gram of sorbent which can reduce the phosphate content by 25 percent and when changing the adsorbent to CaO the optimum condition for phosphate removal is to adjust the pH to 7 take 15 minutes to absorb and add 1 gram of adsorbent which can reduce the phosphate content by 24 percent. The optimum conditions for adsorption when using CaCO3 from mussel shell were to adjust the pH to 10 take 45 minutes to absorb and add 1 gram of sorbent which can reduce the phosphate content by 25 percent and when changing adsorbents to CaO the optimum condition for phosphate removal is to adjust the pH to 10 take 15 minutes to absorb and add 3 grams of adsorbents which can reduce the phosphate content by 24 percent. In addition when studying the adsorption of impurities in the wastewater such as conductivity turbidity COD and BOD it is found that the optimum reduction conditions can reduce the impurities of the parameters that mentioned above were 19.32 2.60 54.77 and 16.67 percent respectively. CaCO3 and CaO produced from eggshell and mussel shell can be used to absorb impurities in wastewater before releasing into natural water sources.

The purposes of this research were : 1) to study the formulation of eggshell clay suitable for development which is a new material in home decoration products inspired by stucco work Wat Phra Chetuphon Wimol Mangkhalaram2) to design and fabricate home decoration products from inspiring stucco work Wat Phra Chetuphon Wimol Mangkhalaram with eggshell clay and 3) to study the satisfaction of experts on home decoration products from the inspiration of the stucco work Wat Phra Chetuphon Wimol Mangkhalaram with eggshell clay. The processes of the research were to study the formulation of clay from eggshell by assigning 5 experts 3 clay mold experts and 2 clay sculptors and select the most suitable formula for 1 formula design and development of home decoration products inspired by stucco work Wat Phra Chetuphon Wimol Mangkhalaram 3 types: mirror frame lamp and vase 3 types of each type 3 types of design 5 experts 2 design instructors 3 interior designers 3 types of the most suitable type 2 interior designers selected the most suitable type for each type of 3 ones. Then fabricated products for home decoration eggshell molding from inspiration stucco work Wat Phra Chetuphon Wimol Mangkhalaram.There were 10 experts for product evaluation ; 5 of them were from clay expertises and the remaining persons were the product designs and inquire about the satisfaction of experts with the product. The results showed that: 1) experts give the highest level of satisfaction to an appropriate eggshell formulation equal to 4.25 in all areas in formula 1 2) research results for product designs experts are interested in choosing a home decoration product designs from the inspiration of the stucco work of Wat Phra Chetuphon Wimol Mangkhalaram with eggshell clay. Classifying products for mirror frame type 2 (3 people 60 %) lamp type 2 ( 4 people 80%) and vase type 1 (3 people 60%) and 3) experts have overall satisfaction towards home decoration products from the inspiration of the stucco work of Wat Phra Chetuphon Wimol Mangkhalaram with eggshell clay at the highest score In every aspect of satisfaction such as product functional material and satisfaction with an overall average score of 4.53 from 10 experts.