Keberkesanan elektro-penggumpalan (aluminum dan ferum) bersama penggumpal komposit(poli aluminum klorida dan tepung ubi kayu) bagi merawat larut lesapan

Kaedah elektro-penggumpalan bersama bahan penggumpal komposit telah banyak digunakan untuk merawat larut lesapan antaranya mengunakan kepelbagaian elektrod. Kepelbagaian elektrod merupakan salah satu faktor yang penting terhadap keberkesanan penyingkiran parameter di dalam proses EC. Kepentingan kajian ini dijalankan adalah untuk mengkaji keberkesanan penggunaan elektrod yang berbeza bersama bahan penggumpal komposit iaitu poli aluminum klorida dan tepung ubi (PACTF) menggunakan kaedah elektro-penggumpalan bagi merawat larut lesapan. Terdapat tiga objektif utama di dalam kajian ini iaitu objektif pertama merangkumi penentuan optimum terhadap ketumpatan arus elektrik, masa tindakbalas dan pH bagi empat keadaan elektrod (Al/Al, Fe/Fe, Al+/Fe-, Fe+/Al-). Objektif kedua merangkumi penentuan percampuran dos optimum bahan penggumpal komposit (PACTF) bersama elekro-penggumpalan. Manakala objektif ketiga ialah mengkaji struktur pembentukkan mendakan/flok pada keadaan optimum dua peringkat penggumpalan menggunakan analisis SEM dan EDX. Di dalam, kajian ini, prosedur kajian telah dijalankan menggunakan 750ml sampel larut lesapan dengan menggunakan pembekal arus elektrik (DC) sebagai pembekal arus bagi empat keadaan susunan elektrod. Bahan penggumpal komposit iaitu PACTF digunakan sebagai bahan percampuran bersama didalam dua peringkat penngumpalan (EC+ penggumpalan kimia). Hasil kajian yang diperolehi mendapati pengunaan elektrod Al+/Fe- menunjukkan peratusan penyingkiran tertinggi dengan menyingkirkan egen pencemaran seperti pepejal terampai, warna, permintaan oksigen kimia (COD), ammonia serta kekeruhan masing-masing sebanyak 94%, 91%, 60%, 15% dan 85% pada keadaan optimum ketumpatan arus 250 A/m2, masa tindakbalas 25 minit pada keadaan optimum pH 5. Bagi percampuran dos PACTF mendapati pengunaan elektrod Al+/Fe pada 300 mg/L dos optimum menunjukkan peratus penyingkiran tertinggi dengan peratusan penyingkiran pepejal terampai, warna, COD, ammonia serta kekeruhan masing-masing 96%, 95%, 71%, 24%, dan 78%. Selain itu, analisa SEM dan EDX mencatatkan ECAl/Fe menunjukkan struktur serta morfologi yang lebih baik bagi elektro-penggumpalan tanpa bahan komposit manakala bagi elektro-penggumpalan bersama bahan komposit, PACTFAl/Fe dan PACTF Al/Al merekodkan struktur morfolologi yang baik iaitu mempunyai permukaan yang lebih licin serta struktur yang lebih terbuka (liang dan pori). Kesimpulan keseluruhan kajian mendapati bahawa elektrod Al/Fe menunujukkan prestasi yang lebih baik berbanding elektrod yang lain samaada di dalam proses elektro-penggumpalan tanpa penggumpal komposit ataupun bersama percampuran bahan penggumpal komposit iaitu PACTF

Removal of Ammoniacal Nitrogen, Colour and Suspended Solids from Leachate using Aerated Electrochemical Coagulation (AEC) Under the Influence Factors of Electrolyte Concentration and Aeration Rate

In this study, aerated electrochemical coagulation (AEC) was used to treat leachate. This study was conducted to determine the best conditions for the AEC method to remove ammoniacal nitrogen, colour and suspended solids from leachate. Electrolyte concentration and aeration rate were the variable operating parameters of this study. Al and Fe electrodes were aerated with an air pump, and polyaluminium chloride (PAC) was added simultaneously to the leachate sample. The optimum value obtained from the AEC was 60ml of electrolyte concentration and an aeration rate of 1.0 L/min. Based on the optimum conditions, the experimental results removed 38%, 93%, and 95% of ammoniacal nitrogen, colour, and suspended solids, respectively. This indicates that the AEC method enhanced the removal of ammoniacal nitrogen, colour and suspended solids from leachate. However, only suspended solids comply with the effluent standard

Composite Coagulant (PACSPP) Ability to Remove Ammonia and Colour from Stabilised Leachate Under Ratio, pH and Dosage Influence

Along with chemical coagulants, coagulation-flocculation is one of the applications that works well for stable leachate treatment. Polyaluminium chloride (PAC) and sweet potato peels (SPP) were operated as a composite coagulant (PACSPP) to investigate the efficiency of removing colour and ammonia from Simpang Renggam landfill’s leachate. From the analysis of the results, the optimum ratio of composite coagulant was PACSPP(b) with a 4:6 ratio. The optimum dose and pH for composite coagulant of PACSPP(b) was 5,000 mg/L at pH 6, with removal percentages of colour and ammonia being 92% and 66%, respectively. The removal percentage of colour and ammonia of composite coagulant is at par but with less chemical coagulant. These results show that a composite coagulant made up of chemical coagulant (PAC) and natural coagulant (SPP) combined the best qualities of both coagulants and improved the coagulation effectivenes

Addition of composite coagulant (polyaluminium chloride and tapioca flour) into electrocoagulation (aluminium and ferum electrodes) for treatment of stabilized leachate

Physical-chemical method such as electrocoagulation (EC) and coagulation-flocculation processes work well for the treatment of stabilized leachate. This study investigated the efficiency of combined treatment (electrocoagulation and conventional coagulation) in removing colour and ammonia nitrogen (NH3-N) from stabilized leachate. For this combined treatment, the Fe and Al electrodes with the addition of composite coagulant (PAC and TF) were used. The considered factors were pH, current density, and duration of current flow. It was observed that, the highest removal of colour and NH3N were 96% and 13% at applied current density of 100 A/m2 that equal to 0.5 A and 20 minutes respectively. For single EC treatment, the highest removal was 88% for colour and 25% for NH3N at 60 minutes by 150 A/m2 that equal to 1.3A. Thus, it showed that the combined treatment performed better than single treatment in removing colour while reducing the current, and shorten the duration of current flow